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Journal articles on the topic 'Chemical oxygen demand (COD)'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Le, Gaoyang, Huizhong Yang, and Xiaodong Yu. "Improved UV/O3 method for measuring the chemical oxygen demand." Water Science and Technology 77, no. 5 (2018): 1271–79. http://dx.doi.org/10.2166/wst.2018.005.

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Abstract We improved the ultraviolet (UV)/O3-based method for measuring chemical oxygen demand (COD) in water. An on-line COD monitoring device was developed and the UV/O3 method was used to oxidize sample solutions. A model was established by using support vector machines (SVM) algorithm to estimate dissolved oxygen and CO2 in solutions. Based on the measured data by each sensor during the oxidation process and the estimated dissolved oxygen and CO2, the UV/O3-based COD test accuracy was improved. This approach overcomes many problems associated with the conventional COD determination techniq

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2

Kamarudin, Mohd Khairul Amri, Noorjima Abd Wahab, Siti Nor Aisyah Md Bati, et al. "Seasonal Variation on Dissolved Oxygen, Biochemical Oxygen Demand and Chemical Oxygen Demand in Terengganu River Basin, Malaysia." Journal of Environmental Science and Management 23, no. 2 (2020): 1–7. http://dx.doi.org/10.47125/jesam/2020_2/01.

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The rise in human population densities and the pace of development had intensified the depletion of the water quality. This study aimed to analyze the concentration of dissolved oxygen (DO), biochemical oxygen demand (BOD) and chemical oxygen demand (COD) during wet season and dry season at Terengganu River in 2016. A total of 29 monitoring stations in the study area were selected and three water quality parameters were analyzed using descriptive statistics and the correlation matrix methods. The DO ranged from 2.11 to 8.07 mg L-1, COD from 2.24 to 39 mg L-1 and BOD from 0.67 to 6.52 mg L-1 fo

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3

Harnadek, Colin M. W., Nigel G. H. Guilford, and Elizabeth A. Edwards. "Chemical Oxygen Demand Analysis of Anaerobic Digester Contents." STEM Fellowship Journal 1, no. 2 (2015): 2–5. http://dx.doi.org/10.17975/sfj-2015-008.

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An anaerobic digester converts organic materials into biogas and digestate in the absence of oxygen. The organic materials studied in this experiment include fibres (types of paper or cardboard), food waste, and woodchips, which serve as a bulking agent. To analyze digester performance, it is necessary to calculate an accurate mass balance based on the chemical oxygen demand (COD) entering and exiting the system. Digester performance refers to maximum efficiency and biogas yield. The COD of the biogas is known, but that of the feed and the digestate is not. This paper describes a method for me

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4

Jardim, Wilson F., and Jarbas J. R. Rohwedder. "Chemical oxygen demand (COD) using microwave digestion." Water Research 23, no. 8 (1989): 1069–71. http://dx.doi.org/10.1016/0043-1354(89)90182-6.

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5

Wojnárovits, László, Renáta Homlok, Krisztina Kovács, Anna Tegze, and Ezsébet Takács. "Wastewater Characterization: Chemical Oxygen Demand or Total Organic Carbon Content Measurement?" Molecules 29, no. 2 (2024): 405. http://dx.doi.org/10.3390/molecules29020405.

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The long time (2 h) required for measurement, expensive chemicals (Ag2SO4), and toxic reagents (K2Cr2O7, HgSO4) limit the application of the standard method for measuring the oxygen equivalent of organic content in wastewater (chemical oxygen demand, COD). In recent years, the COD has increasingly been replaced by the total organic carbon (TOC) parameter. Since the limit values of the pollution levels are usually given in terms of the COD, efforts are being made to find the correlation between these parameters. Several papers have published correlation analyses of COD and TOC for industrial an

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6

Sinurat, Mangoloi, Rosmayani Hasibuan, and Nelma Hasibuan. "Pemanfaatan eceng gondok untuk menurunkan kandungan biological oxygen demand (BOD), chemical oxygen demand (COD), pH, bau dan warna limbah cair tahu." Jurnal Pendidikan Kimia 9, no. 3 (2017): 356–61. http://dx.doi.org/10.24114/jpkim.v9i3.8909.

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7

Zhao, Yan, Hong Tang, Xiaoyan Ge, Yongyu Li, and Shihua Wang. "The chloride ion to the chemical oxygen demand (COD) analysis of the influence of different analysis method." E3S Web of Conferences 236 (2021): 02034. http://dx.doi.org/10.1051/e3sconf/202123602034.

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Research shows that chloride ion in the process of chemical oxygen demand (COD) analysis has a huge impact on the results of the analysis, How to improve the accuracy of chemical oxygen demand analysis results in the presence of chlorine ion interference is a difficult problem in current environmental monitoring work, This article introduces the chlorine ion in different analysis method to analysis the influence degree of the chemical oxygen demand (COD).

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8

Xue, Xingfu. "Treatment of ultrahigh chemical oxygen demand chemical wastewater by Fenton oxidation." Journal of Physics: Conference Series 2109, no. 1 (2021): 012011. http://dx.doi.org/10.1088/1742-6596/2109/1/012011.

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Abstract The article focuses on the Fenton oxidation process for the treatment of ultrahigh COD chemical wastewater from chemical plants. Optimum pH was determined as 2.0 and 10.0 for the first (oxidation) and second stage (coagulation) of the Fenton process, respectively. 0.465gFeSO4·7H2O, H2O2(30%)2ml, the mole tatio of H2O2 : Fe2+=10:1, adjust the pH of the solution to 10, after 1.5 hours of agitation, then add 5% PAM2ml to the solution, filtrate, extract, filtrate the clear liquid and dilute it three times, take 200ml of the diluted liquid, and add 0.465gFeSO4·7H2O, H2O2(30%)2ml, the mole

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9

Amagu, Kaiki, Riho Okajima, Moe Shimizu, et al. "Evaluation Method of Emulsion Using Chemical Oxygen Demand." MATEC Web of Conferences 333 (2021): 11009. http://dx.doi.org/10.1051/matecconf/202133311009.

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The “gas–liquid two-phases mixed flow” mechanism that fine bubble generation uses rapidly swirling water, which shear gas and making small bubbles in water. Based on this mechanism, sending liquid such as oil into the swirling water instead of gas and it able to be emulsified. At present, evaluation methods for emulsions are using particle size distribution and dispersion stability. However, the emulsion with bad separation behavior has a problem to catch only some dispersed oil particles and use them as a whole evaluation. In this study we examined emulsion evaluated by chemical oxygen demand

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10

Amagu, Kaiki, Riho Okajima, Moe Shimizu, et al. "Evaluation Method of Emulsion Using Chemical Oxygen Demand." MATEC Web of Conferences 333 (2021): 11009. http://dx.doi.org/10.1051/matecconf/202133311009.

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The “gas–liquid two-phases mixed flow” mechanism that fine bubble generation uses rapidly swirling water, which shear gas and making small bubbles in water. Based on this mechanism, sending liquid such as oil into the swirling water instead of gas and it able to be emulsified. At present, evaluation methods for emulsions are using particle size distribution and dispersion stability. However, the emulsion with bad separation behavior has a problem to catch only some dispersed oil particles and use them as a whole evaluation. In this study we examined emulsion evaluated by chemical oxygen demand

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11

Setiawan, Oki, and Alfian Trisna Pradipta. "Penggunaan Metode Response Surface Methodology Box Behnken Untuk Pemodelan dan Optimasi Proses Fenton pada Pengolahan Limbah Cair Home Industri Sarung Tenun Tradisional Medangan Gresik." METANA 20, no. 2 (2024): 97–107. https://doi.org/10.14710/metana.v20i2.66413.

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Seiring dengan semakin meningkatnya industri tekstil di Indonesia, akan berbanding lurus dengan limbah yang dihasilkan dari proses produksi. Limbah pewarna ini mengandung berbagai macam polutan organik, anorganik, dan senyawa kimia berbahaya lainnya yang, jika dibuang ke sumber air bersih tanpa pengolahan terlebih dahulu, dapat mencemari lingkungan perairan. Salah satu kandungan yang harus memenuhi baku mutu air limbah menurut Peraturan Menteri Lingkungan Hidup No. 5 Tahun 2014 tentang Baku Mutu Air Limbah Bagi Industri Tekstil adalah kadar Chemical Oxygen Demand maksimal 150 mg/L. Dari peneli

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12

Eko Supriadi and Ailsya Nadya Rizki. "Influence Decrease in Chemical Oxygen Demand (COD) Against Biogas Quality and Production." International Journal of Mathematics and Science Education 1, no. 4 (2024): 09–15. https://doi.org/10.62951/ijmse.v1i4.94.

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Chemical Oxygen Demand or Need Oxygen chemistry is amount oxygen is needed for waste organic matter in the water can oxidized in a way chemistry . Chemical Oxygen Demand (COD ) have the value which is size For level pollution by material organic . COD value contained in material standard such as palm oil mill effluent can converted into biogas due to its high value so that allow For produce high biogas production . On study This done data collection in direct that is with using secondary data and primary data. From the research that has been done , known that The more high COD Removal then th

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13

Deni, Nur Fauzi, and Ari Setyawan Dimas. "OPTIMISASI CHEMICAL OXYGEN DEMAND PRODUCED WATER PADA POLISHING UNIT." MADANI: Jurnal Ilmiah Multidisiplin 1, no. 2 (2023): 79–81. https://doi.org/10.5281/zenodo.7782294.

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Polishing unit pada Saka Indonesia Pangkah Limited menggunakan <em>biological treatment </em>yang memanfaatkan bakteri aerob untuk mengurangi kadar <em>Chemical Oxygen Demand</em> (COD) effluent pada produce water saat eksplorasi minyak agar sesuai dengan baku mutu. Untuk menjaga agar bakteri tetap hidup diperlukan tambahan substrat berupa nitrat dan fosfat yang dijaga pada kondisi tertentu. Uji data operasional menunjukan bahwa hubungan antara kadar COD effluent dengan variabel-variabel lain non linier dan kompleks. Sehingga dibutuhkan pemodelan <em>black box</em> seperti <em>Artificial Neura

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14

Fitriani, Nur, and Slamet Isworo. "The phytoremediation of Echinodorus palaefolius (Water Jasmine) in reducing BOD and COD of liquid waste - Batik Industry "X" in Pekalongan." GSC Biological and Pharmaceutical Sciences 12, no. 3 (2020): 215–22. https://doi.org/10.5281/zenodo.4266090.

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The "X" batik industry is a textile industry with industrial waste water discharged into water bodies which causes high pollution in the Lodji river.  Data from the Environmental Office of Pekalongan on the status of biological oxygen demand  (BOD) and chemical oxygen demand (COD) in the Lodji River are classified as high, namely between 2.741 – 1.464 mg/l, exceeding the quality standard <45 mg.  Phytoremediation technology is an effort to reduce Biological Oxygen Demand and Chemical Oxygen Demand pollutants. This study aims to determine the ability of phytore

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15

Azhar, Muhammad Rizwan, Paul Nolan, Keith Cadee, and Mehdi Khiadani. "Chemical-Free Biologically Enhanced Primary Treatment of Raw Wastewater for Improved Capture Carbon." Water 14, no. 23 (2022): 3825. http://dx.doi.org/10.3390/w14233825.

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Conventional wastewater treatment processes require extensive energy inputs for their operations. Biologically enhanced primary treatment (BEPT) is a promising technology to capture incoming organics that may be utilized to produce biogas and potentially hydrogen with further downstream processing. This study involved a biologically enhanced primary treatment (BEPT) of raw wastewater at bench and pilot-scale using activated sludge (AS) addition and dissolved air flotation (DAF) using raw wastewater at a municipal wastewater facility in Western Australia with average chemical oxygen demand of ~

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16

Nur Shinta Dewi, Mareta, and Suseno. "Analysis of Color and Chemical Oxygen Demand (COD) in Textile Industry Wastewater." Jurnal Kimia dan Rekayasa 3, no. 2 (2023): 77–83. http://dx.doi.org/10.31001/jkireka.v3i2.51.

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Industry Textile including in Industry big that produces many waste especially waste water with content ingredient organic big who has color thick , smelly , and high Chemical Oxygen Demand (COD) , so that the waste water the should need processed more formerly before released to body of water with Fulfill raw the quality that has been set . Study this aim for knowing wastewater quality _ industry textile A if compared with raw quality according to Regulation Minister Environment Life and Forestry Republic of Indonesia Number P.16/MENLHK/SETJEN/KUM.1/4/ 2019 concerning Wastewater Quality Stand

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17

Piro, P., M. Carbone, G. Garofalo, and J. Sansalone. "CSO treatment strategy based on constituent index relationships in a highly urbanised catchment." Water Science and Technology 56, no. 12 (2007): 85–91. http://dx.doi.org/10.2166/wst.2007.758.

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In urbanising catchments the variability of particulate matter (solids) and oxygen demanding constituents of wet weather and dry weather characteristics result in variable treatment effectiveness from physical unit operations and biological unit processes. Higher organic concentrations during dry weather flow are more amenable to biological unit processes while the higher inorganic loads generated largely by urban wet weather constituents and much larger flows can be more effectively treated or conditioned by physical unit operations, including ideally preceded by hydrologic controls. This stu

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18

Kahar, Kahar, and Bunga Prasetia. "Gambaran Kadar Biochemical Oxygen (BOD) dan Chemical Oxygen Demand (COD) pada Limbah Cair Industri Tahu." Jurnal Sanitasi Profesional Indonesia 4, no. 2 (2023): 101–10. http://dx.doi.org/10.33088/jspi.4.2.101-110.

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Air limbah merupakan kombinasi cairan atau air atau limbah yang dihasilkan dari kegiatan rumah tangga, kelembagaan, komersial, dan industri yang dapat menyebabkan berbagai masalah, salah satunya industri tahu ini menghasilkan limbah cair dan limbah padat, terutama limbah cair dapat menyebabkan masalah dan pencemaran lingkungan apabila tidak diolah terlebih dahulu, baku mutu air limbah bagi usaha atau kegiatan pengolahan kedelai diantaranya Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Potential Hydrogen (pH), Total Suspended solid (TSS). Pabrik. Tujuannya untuk mengetahui kada

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19

Duan, Maoqing, Xia Du, Wenqi Peng, Cuiling Jiang, and Shijie Zhang. "Role of humic substances as refractory organic matter in sustainable water quality assessment and management." Water Supply 20, no. 2 (2019): 538–49. http://dx.doi.org/10.2166/ws.2019.186.

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Abstract In northern China, river water originating from or flowing through forests often contains large amounts of oxygen-consuming organic substances, mainly humic substances. These substances are stable and not easily biodegradable, resulting in very high detection values of chemical oxygen demand. However, under natural conditions, the dissolved oxygen demand is not as high. Using experimental values to evaluate river water quality and the impact of human activities on water quality is thus unscientific and does not meet national development goals. In this study, the potential sources of h

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20

Suaebu, Syamsudin, Rasman Rasman, and Muh Ahwan Fawwaz. "Eco Enzyme Dalam Mendegradasi Bahan Organik Pada Lindi TPA Antang." Sulolipu: Media Komunikasi Sivitas Akademika dan Masyarakat 25, no. 1 (2025): 47–54. https://doi.org/10.32382/sulo.v25i1.1306.

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Lindi yang berasal dari tempat pembuangan akhir merupakan air limbah yang sangat tercemar yang dapat menyebabkan permasalahan seperti pencemaran udara, pencemaran tanah dan juga pencemaran air di sekitar TPA (Tempat Pembuangan Akhir) maka dari itu perlu dilakukan pengolahan dan dengan memanfaat sisa kulit buah yang dibuat menjadi eco enzyme yang dapat bermanfaat untuk mengurangi sampah dan sebagai bahan untuk melakukan pengolahan lindi. Jenis penelitian ini merupakan penelitian quasy eksperimen atau eksperimen semu yang bertujuan untuk mengetahui kemampuan eco enzyme dalam mendegradasi bahan o

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Wahyuni, Sigma, and Sugito Sugito. "PENGARUH PENGGUNAAN KOAGULAN PADA BIOFILTER ANAEROBIK AEROBIK DALAM MENURUNKAN COD (CHEMICAL OXYGEN DEMAND) DAN BOD (BIOLOGICAL OXYGEN DEMAND) LIMBAH CAIR INDUSTRI FARMASI." WAKTU: Jurnal Teknik UNIPA 13, no. 1 (2016): 54–62. http://dx.doi.org/10.36456/waktu.v13i1.25.

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Limbah cair PT. Interbat berasal dari kegiatan domestik meliputi laundry (menggunakan detergen bebas phospat), kegiatan hygiene personal (mandi, keramas dan cuci tangan), kegiatan dapur dan kantin, toilet/WC (buang air), kegiatan kebersihan (pembersihan lantai dan kamar mandi); kegiatan produksi (penisilin, sefalosporin, dan non betalaktam) dan laboratorium meliputi pencucian alat-alat produksi dan alat laboratorium, pencucian botol, air cucian vial, air buangan dari wet scrubber HVAC (sistem tata udara). Beban dan jumlah limbah cair yang masuk dalam IPAL sentral PT. Interbat sering mengalami

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Geerdink, René Bernard, Joyce Brouwer, and Onno Jacob Epema. "A reliable mercury free chemical oxygen demand (COD) method." Analytical Methods 1, no. 2 (2009): 108. http://dx.doi.org/10.1039/b9ay00146h.

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23

Sholehah, Hijriati, Taufik Abdullah, Azwarudin, and Sri Aprianti. "Using pumice as an alternative to reduce biological oxygen demand and chemical oxygen demand in tough waste." Jurnal Pijar Mipa 18, no. 6 (2023): 1034–39. http://dx.doi.org/10.29303/jpm.v18i6.5989.

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The tofu industry is a type of industry that operates in the field of food processing from soybean raw materials. The tofu industry is dominated by small-scale businesses, most integrated into residential areas. The tofu industry has yet to process the liquid waste it produces. High environmental pollution can result in the death of aquatic biota due to lack of oxygen. This research aims to reduce BOD and COD levels that do not meet quality standards. Based on this, research was conducted to reduce the organic content in tofu liquid waste using pumice stone as a filtration medium. The research

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24

Wang, Jin, Li Jun Wang, He Xiao, and Jin Shan Chen. "Wet End Performance of Polydimethyl-Diallyl Ammonium Chloride with Different Characteristics." Advanced Materials Research 233-235 (May 2011): 1597–602. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1597.

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PDADMAC fixing agents with different characteristics were used to control dissolved and colloidal substances in P-RC APMP fiber suspension. Results showed that PDADMAC with higher charge density was easier to interact with anionic trash, resulting in better removal of suspended solid materials and chemical oxygen demand(COD). The PDADMAC achieved 78% removal of chemical oxygen demand. PDADMAC with higher molecular weight could easily be adsorbed onto fibers and fines, and had good removal for anionic trash. It was also found that PDADMAC with higher molecular weight was better to remove suspen

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Baquero-Rodríguez, Gustavo Andrés, Jaime A. Lara-Borrero, and Jorge Martelo. "A simplified method for estimating chemical oxygen demand (COD) fractions." Water Practice and Technology 11, no. 4 (2016): 838–48. http://dx.doi.org/10.2166/wpt.2016.089.

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A simplified method is presented for estimating chemical oxygen demand (COD) fractions. Its effectiveness was assessed by comparing different values found in literature. This case study considered two main sanitary sewer collection systems in Bogotá, Colombia. The results showed important differences in COD fractions between the sewer collection systems and the reference data. The method presented demonstrated advantages over those currently in place, the paper provides detailed explanations of the steps required and establishes a unified interpretation of the results obtained.

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Uwidia, Ita Erebho, and Christopher Ejeomo. "Prediction of Five-day Biochemical Oxygen Demand (BOD5) from Chemical Oxygen Demand (COD) Values in Raw and Biologically Treated Domestic Sewage." Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences 58, no. 3 (2015): 172–74. http://dx.doi.org/10.52763/pjsir.phys.sci.58.3.2015.172.174.

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The functional relationship between BOD5 and COD was evaluated using domestic sewage samples collected from a sewage treatment plant in an estate in Warri, Delta State, Nigeria. Two types of samples were collected: raw domestic sewage,(influent) and biologically treated domestic sewage (effluent).The correlation coefficient r between the BOD5 and COD was determined and values were 0.99 and 0.94, respectively for different sewage samples. The regression analysis carried out showed very strong correlation . The linear correlation established was: COD = 1.62 BOD5 + 15.82 ; r2 = 0.978; COD = 1.5

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Dwi Pratiwi, Emi Jayanti, Eko Sulistiono, and Mimatun Nasihah. "Efektifitas Filter Batang Pisang terhadap Penurunan Kadar Total Suspended Solid, Chemical Oxygen Demand dan Biological Oxygen Demand pada Limbah Domestik." Jurnal Enviscience 5, no. 2 (2021): 70–75. http://dx.doi.org/10.30736/5ijev.v5iss2.281.

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Limbah rumah tangga adalah limbah cair hasil buangan dari kegiatan perumahan (rumah tangga) seperti dapur, mandi, dan cucian. Limbah domestik merupakan jumlah pencemar terbesar (85%) yang masuk ke badan air. Penelitian ini bertujuan untuk mengetahui penurunan kadar TSS (Total Suspended Solid), COD (Chemical Oxygen Demand) dan BOD (Biocemical Oxygen Demand) pada limbah domestik setelah dilakukan filter batang pisang. Jenis penelitian ini menggunakan eksperimen dengan uji analisis ANOVA dan didukung dengan uji analisis REGRESI. hasil analisis kualitas air limbah domestik akan dibandingkan dengan

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Dwi Pratiwi, Emi Jayanti, Eko Sulistiono, and Mimatun Nasihah. "Efektifitas Filter Batang Pisang terhadap Penurunan Kadar Total Suspended Solid, Chemical Oxygen Demand dan Biological Oxygen Demand pada Limbah Domestik." Jurnal EnviScience (Environment Science) 5, no. 2 (2021): 70–75. https://doi.org/10.30736/jev.v5i2.281.

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Limbah rumah tangga adalah limbah cair hasil buangan dari kegiatan perumahan (rumah tangga) seperti dapur, mandi, dan cucian. Limbah domestik merupakan jumlah pencemar terbesar (85%) yang masuk ke badan air. Penelitian ini bertujuan untuk mengetahui penurunan kadar TSS (Total Suspended Solid), COD (Chemical Oxygen Demand) dan BOD (Biocemical Oxygen Demand) pada limbah domestik setelah dilakukan filter batang pisang. Jenis penelitian ini menggunakan eksperimen dengan uji analisis ANOVA dan didukung dengan uji analisis REGRESI. hasil analisis kualitas air limbah domestik akan dibandingkan dengan

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29

Nóbrega, Eryka Thamyris Damascena, Iagê Terra Guedes de Oliveira, Anderson Dias Viana, Luiz Henrique da Silva Gasparotto, and Edgar Perin Moraes. "A low-cost sensor based on silver nanoparticles for determining chemical oxygen demand in wastewater via image processing analysis." Analytical Methods 11, no. 43 (2019): 5577–83. http://dx.doi.org/10.1039/c9ay01755k.

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Saputri, Indryani, Fatimatuzzahra Fatimatuzzahra, and Yetti Lestari. "Analisa Kadar COD (Chemical Oxygen Demand) Pada Limbah Cair Disekitar Kawasan Penambangan Batubara Kabupaten Bengkulu Utara." Organisms: Journal of Biosciences 3, no. 2 (2023): 9. http://dx.doi.org/10.24042/organisms.v3i2.18035.

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COD (Chemical Oxygen Demand) is the amount of oxygen used to degrade organic substances present in water through chemical processes. The magnitude of the COD value indicates that there is a significant amount of organic matter in the water. These organic substances convert oxygen into carbon dioxide and water, resulting in oxygen depletion in the water. The method used involves absorbance analysis using a spectrophotometer. The data are analyzed through duplicate analysis. This research aims to determine the COD levels in surface water and wastewater from mining companies, which can serve as i

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31

Khristiani Suhari, Dian, and Peni Pujiastuti. "Chemical Oxygen Demand (COD) Analysis Ink Printing Waste Water Using Titrimetry Method." Jurnal Kimia dan Rekayasa 1, no. 1 (2020): 24–31. http://dx.doi.org/10.31001/jkireka.v1i1.9.

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The printing industry produces wastewater from the ink used. Contains organic and inorganic pollutants such as lead, cadmium, chromium and zinc. Having a quality that exceeds the quality standards for wastewater. If it is discharged into the environment it can pollute the receiving water body. Need to do an analysis of organic pollutant content, by measuring the parameters of Chemical Oxygen Demand (COD). Determination of COD numbers in printing industry wastewater ink using titrimetry method (SNI 6989.73: 2009). Perform oxidation-reduction titration using Ferro Ammonium Sulfate (FAS) solution

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Toth, Andras Jozsef, Eniko Haaz, Botond Szilagyi, et al. "COD reduction of process wastewater with vacuum evaporation." Waste Treatment and Recovery 3, no. 1 (2018): 1–7. http://dx.doi.org/10.1515/wtr-2018-0001.

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Abstract Washing detergents in process wastewaters from fine chemical industry produce high Chemical Oxygen Demand (COD), which poses a serious environmental problem. Method has to be found, which follows the principles of circular economy so that the treated water can be recycled or reused. Heat pump vacuum evaporator is evaluated in order to reduce the Chemical Oxygen Demand of process wastewater with washing detergent content from initial 7500 mg O2/L to a lower value below the effluent limit , which is 1000 mg O2/L. Yield and COD rejection are determined for the evaluation of selected trea

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El bied, Oumaima, Mathieu Kessler, Martire Angélica Terrero, Taoufiq Fechtali, Angel Faz Cano, and José A. Acosta. "Turbidity and Chemical Oxygen Demand Reduction from Pig Slurry through a Coagulation Flocculation Process." Agronomy 11, no. 11 (2021): 2158. http://dx.doi.org/10.3390/agronomy11112158.

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Pig slurry is considered a high-risk effluent that causes several environmental problems if it is not adequately managed and treated. White Iberian pig farms in the southeast of Spain treat their slurry in situ using separation, double filtration, decantation, and constructed wetland treatments. However, the pretreatment process does not successfully reduce solids, which leads to clogging in the constructed wetlands (CWs). The main objective of this research paper is to reduce the turbidity and chemical oxygen demand (COD) from the effluent to make it appropriate for CW treatment. Optimization

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Wardani, Nur Indah, Septi Purwaningsih, Annisa Yuliana Angeline, Sari Sekar Ningrum, Muhamad Sofi Ardani, and Zhilal Shadiq. "Prinsip Kerja Sensor Elektrokimia dalam Penentuan Chemical Oxygen Demand (COD): Review." SCISCITATIO 6, no. 1 (2025): 15–23. https://doi.org/10.21460/sciscitatio.2025.61.189.

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Peningkatan kebutuhan sumber air akibat tingginya populasi masyarakat memerlukan perhatian terhadap uji kualitas air. Chemical Oxygen Demand (COD) adalah indikator jumlah limbah organik di dalam air. Penggunaan sensor elektrokimia dalam pengukuran COD memberikan keuntungan lebih, seperti sensitivitas tinggi dan biaya murah. Pengukuran COD menggunakan sensor elektrokimia didasarkan pada reaksi oksidasi elektrokimia senyawa organik melalui reaksi dengan radikal hidroksil (.OH) pada elektroda kerja (WE). Terdapat 2 prinsip kerja yang digunakan dalam reaksi oksidasi limbah organik, yaitu degradasi

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Verma, Sanjay. "Seasonal and Spatial Variations in Biochemical and Chemical Oxygen Demand of Untreated Sewage in Sironj Tehsil, District Vidisha, India." International Scientific Journal of Engineering and Management 04, no. 06 (2025): 1–9. https://doi.org/10.55041/isjem04667.

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- In this study, untreated sewage from five suburban sites in Sironj Tehsil, district- Vidisha, India, was evaluated for seasonal and spatial variations in Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) in 2024. The APHA 5210 B and 5220 D procedures for BOD and COD, respectively, were used to analyse 100 sewage samples from Kahra Bazar, Kathali, Bhawani Nagar, Katra Mohalla, and Hajipur. Due to runoff-driven organic matter, the BOD ranged from 159.16 to 186.96 mg/L, with Bhawani Nagar recording the highest value (186.96 mg/L) during the monsoon season (mean 180.98 mg/L). Bhaw

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Mallari, Rhea, Jose Rene Micor, and Ernesto del Rosario. "Comparison of Spectrophotometric and Digital Photometric Methods for Determining Chemical Oxygen Demand." Journal of Environmental Science and Management 21, no. 2 (2018): 16–22. http://dx.doi.org/10.47125/jesam/2018_2/03.

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Visible spectrophotometry (VS) and digital photometry (DP) for determining chemical oxygen demand (COD) were compared; the latter method involved image processing of digital photographs of analyte solutions using RGB-AIC software. Statistical analysis showed that COD values of untreated and treated (trickling filter) wastewater samples from a hog slaughterhouse were not significantly different using VS and DP methods. The COD values were not significantly different among the treated samples as well using a* and L* plots. Tests for accuracy and repeatability of the DP method showed acceptable r

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Sanou, Yacouba, Samuel Pare, Gnon Baba, Nyonuwosro Kwamivi Segbeaya, and Libona Yvonne Bonzi-Coulibaly. "Removal of COD in wastewaters by activated charcoal from rice husk." Revue des sciences de l’eau 29, no. 3 (2017): 265–77. http://dx.doi.org/10.7202/1038927ar.

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The discharge of industrial wastewater and domestic sewage from Kara city affects the quality of Kara river water. To mitigate this water pollution, the capacity of mesoporous charcoal prepared from rice husk (RH) to remove the chemical oxygen demand (COD) in wastewater samples from five sites of Kara City was investigated. The temperature, pH, conductivity, total suspended solids (TSS), biochemical oxygen demand (BOD5), chemical oxygen demand (COD) and oxidizable matters (OM) of samples were analyzed. Batch experiments were applied to study the COD reduction by using powdered RH and two types

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Abuzar, Suarni Saidi, and Yommi Dewilda. "ANALISIS PENYISIHAN CHEMICAL OXYGEN DEMAND (COD) LIMBAH CAIR HOTEL MENGGUNAKAN SERBUK KULIT JAGUNG." Jurnal Dampak 11, no. 1 (2014): 18. http://dx.doi.org/10.25077/dampak.11.1.18-27.2014.

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Perlunya penelitian penyisihan Chemical Oxygen Demand (COD) menggunakan serbuk kulit jagung adalah untuk menentukan besarnya nilai absorsi COD dan menganalisis kemampuan serbuk kulit jagung dalam penyisihan COD limbah cair hotel. Penelitian ini dilakukan secara bacth, menggunakan larutan artifisial glukosa untuk mendapatkan kondisi optimasi dari variasi diameter, berat adsorben, waktu kontak, konsentrasi larutan, kecepatan pengadukan dan pH larutan. Analisis menggunakan metode spektofotometer. Kondisi optimum yang diperoleh yaitu diameter adsorben (0.127-0.181) mm, berat adsorben 1.5 gram, wak

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Hasanah, Uswatun, Ade Heri Mulyati, Sutanto ., et al. "DEVELOPMENT OF COD (CHEMICAL OXYGEN DEMAND) ANALYSIS METHOD IN WASTE WATER USING UV-VIS SPECTROPHOTOMETER." Journal of Science Innovare 3, no. 2 (2020): 35–38. http://dx.doi.org/10.33751/jsi.v3i2.3007.

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The COD (Chemical Oxygen Demand) analysis method based on the Indonesian National Standard (SNI) is a revision of SNI 06-6989.2-2004, Water and wastewater - Part 2: Method of testing for chemical oxygen demand (COD) with closed reflux spectrophotometrically. This SNI uses references from international standard methods, namely Standard Methods for the Examination of Water and Wastewater, 21st Edition, editor of LS Clesceri, AE Greenberg, AD Eaton, APHA, AWWA and WEF, Washington DC, 2005, Methods 5220 D (Closed Reflux, Colorimetric Methods). The purpose of this study was to validate the total me

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Hue, Do Thi Kim, Takumi Shiba, Yasuaki Maeda, and Norimichi Takenaka. "A 3-step chemiluminescence method for chemical oxygen demand measurement with dichromate oxidizing reagent." Anal. Methods 9, no. 39 (2017): 5797–805. http://dx.doi.org/10.1039/c7ay01652b.

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In this study, the use of potassium dichromate as an oxidizing reagent in the 3-step chemiluminescence (CL) chemical oxygen demand (COD) method, based on the principle of the permanganate COD (COD<sub>Mn</sub>) method (JIS K0102), was developed (3-step CL COD<sub>Cr</sub> method).

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Rahman, SH, SMN Islam, N. Kaiser, and Md M. Rahman. "Electrocoagulation (EC) for Reduction of Chemical Oxygen Demand (COD) of Surface Water." Bangladesh Journal of Scientific and Industrial Research 47, no. 1 (2012): 77–82. http://dx.doi.org/10.3329/bjsir.v47i1.10728.

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Karnopara Canal water containing high COD values (1050 mg O2/L) was treated by electrocoagulation (EC) method covering a wide range of operating conditions such as, water pH, internal electrode distances, final pH, supplying 30V electricity for constant time period (30 minutes) through same electrode material (Al electrode). The effects of different operating parameters on the efficiency of the process were examined. Targeting to reduce the COD value within the recommended limit (200 mg O2/L), this research work was emphasized on EC treatment at the simplest and cheapest way. The batch experim

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Elsheikh, Mahmoud Abdel-Shafy. "Tannery wastewater pre-treatment." Water Science and Technology 60, no. 2 (2009): 433–40. http://dx.doi.org/10.2166/wst.2009.351.

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Tannery wastewater is one of the most pollution sources. It can cause environmental problems related to its high organic matter, suspended solids and chromium. Chromium (III) salts are the most widely used chemicals for tanning processes, causing the tannery wastewater to be highly pollutant with chromium. The main objective of this study is to investigate the pre-treatment of an actual Egyptian tannery wastewater using two systems; the first electrolytic system and the second physico-chemical system. The performances of electrolytic system at current of 10, 20, 30 and 40 A were discussed. Poo

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Hanafiah, M. M., N. I. H. A. Aziz, A. A. Halim, L. S. Shamdin, and L. A. A. Razzak. "Phytoremediation of landfill leachate using Ipomoea aquatica and Pistia stratiotes." Journal of Environmental Biology 42, no. 3(SI) (2021): 775–81. http://dx.doi.org/10.22438/jeb/42/3(si)/jeb-06.

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Aim: In this study, Ipomoea aquatica and Pistia stratiotes were used to remove total suspended solids, chemical oxygen demand and ammoniacal nitrogen (NH3-N) from the landfill leachate collected at Ampar Tenang Closed Landfill (ATCL) site in Dengkil, Selangor, Malaysia. Methodology: The physico-chemical characteristics of landfill leachate (pH, temperature, NH3-N, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, total dissolved solids, total suspended solids, salinity, electrical conductivity and nitrite as well as selected heavy metals were determined before phytoremediati

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Bima, Damar Nurwahyu, Kumala Devi, Suhartana Suhartana, and Sriyanti Sriyanti. "Optimasi Kondisi Elektrokoagulasi pada Proses Degradasi Limbah Karbofuran (Furadan 3GR) dengan Elektroda Al/grafit." ALCHEMY:Journal of Chemistry 11, no. 1 (2023): 12–18. http://dx.doi.org/10.18860/al.v11i1.15360.

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Elektrokoagulasi merupakan salah satu metode elektrokimia untuk mengolah polutan air dan limbah. Pada penelitian ini, proses elektrokoagulasi menggunakan elektroda aluminium diaplikasikan pada limbah artistik yang mengandung karbofuran untuk melihat nilai chemical oxygen demand (COD). Proses elektrokoagulasi dipilih dalam penelitian ini berdasarkan beberapa keunggulan, seperti mudah dan sederhana untuk diaplikasikan. Beberapa parameter seperti waktu elektrolisis, konsentrasi elektrolit, dan pengaruh pH telah diteliti pengaruhnya terhadap proses elektrokoagulasi. Hasil penelitian menunjukkan ba

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Leonard, Franita, Wahyuni, and Hasanuddin. "Identifikasi Risiko Pencemaran Air Limbah Domestik." Jurnal Media Teknik Sipil 2, no. 1 (2024): 33–42. https://doi.org/10.56963/judiateks.v2i1.369.

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Air memiliki peranan yang sangat penting bagi ekosistem lingkungan, air sangat diperlukan untuk memenuhi keberlangsungan mahluk hidup dan alam sekitarnya, tetapi juga sebagai potensi sumber energi terbarukan dalam pembangunan berkelanjutan. Penelitian ini bertujuan untuk meng identifikasi risiko pencemaran lingkungan yang terjadi terhadap pembuangan air limbah domestik. Pengambilan sampel air dilakukan secara langsung menggunakan metode grab sampling dengan menggunakan alat water sampler sesuai dengan SNI. Sampel tersebut dibawa ke laboratorium yang telah terakreditasi KAN untuk dianalisis. Pa

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Khorsandi, Hassan, Rahimeh Alizadeh, Horiyeh Tosinejad, and Hadi Porghaffar. "Analysis of nitrogenous and algal oxygen demand in effluent from a system of aerated lagoons followed by polishing pond." Water Science and Technology 70, no. 1 (2014): 95–101. http://dx.doi.org/10.2166/wst.2014.194.

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In this descriptive-analytical study, nitrogenous and algal oxygen demand were assessed for effluent from a system of facultative partially mixed lagoons followed by the polishing pond using 120 grab samples over 1 year. Filtered and non-filtered samples of polishing pond effluent were tested in the presence and absence of a nitrification inhibitor. Effective factors, including 5-day biochemical and chemical oxygen demand (BOD and COD), total suspended solids (TSS), dissolved oxygen, chlorophyll A, and temperature, were measured using standard methods for water and wastewater tests. The result

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Dhea Permatasari Putri, Syaisariyana Alfin Wahida, and Marlinda Marlinda. "Pemanfataan Kulit Pisang Kepok (Musa Paradisiaca L.) Sebagai Adsorben Untuk Menurunkan Kadar COD (Chemical Oxygen Demand) Pada Air Limbah Laundry." Jurnal Informasi, Sains dan Teknologi 5, no. 02 (2022): 71–77. http://dx.doi.org/10.55606/isaintek.v5i02.66.

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Industri laundry merupakan salah satu industri yang banyak dijumpai di indonesia. Akibat dari pembuangan limbah laundry tanpa adanya pengolahan terlebih dahulu mengakibatkan terjadinya pencemaran lingkungan. Penelitian ini bertujuan untuk mengetahui pengaruh variasi waktu kontak adsorben yang berasal dari kulit pisang kepok sebagai karbon aktif terhadap penurunan konsentrasi nilai COD (Chemical Oxygen Demand) pada limbah laundry melalui model persamaan adsorpsi isothermal Freundlich dan isothermal Langmuir. Metode yang digunakan untuk pengolahan limbah yakni metode adsorbsi dengan karbon aktif

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Yustiani, Yonik Meilawati, Fadjari Lucia Nugroho, Fauzi Zaki Murtadho, and Achmad Teguh Djayadisastra. "Applying Eco Enzyme to Reduce Chemical Oxygen Demand (COD) Content of Artificial River Water." Journal of Engineering and Technological Sciences 55, no. 1 (2023): 91–97. http://dx.doi.org/10.5614/j.eng.technol.sci.2023.55.1.9.

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Eco enzyme is claimed to improve the quality of polluted water. However, the low pH of eco enzyme solutions can acidify water. The objective of this study was to investigate the effectiveness of eco enzyme in reducing the COD of river water and its effect on the pH of sterilized synthetic river water. The effect of 0.01%, 0.5%, and 1% enzyme concentrations on the COD and pH of synthetic river water with an initial COD of 240 mg/l was investigated. The results showed that eco enzyme itself has high concentration of COD and low pH. The undiluted eco enzyme increased the COD and decreased the pH

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Mulyati, Ade Heri, Leny Heliawati, Sutanto ., et al. "DEVELOPMENT OF COD (CHEMICAL OXYGEN DEMAND) ANALYSIS METHOD IN WASTE WATER USING SPECTRODIRECT." Journal of Science Innovare 3, no. 2 (2020): 32–34. http://dx.doi.org/10.33751/jsi.v3i2.3006.

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Increased human activities will cause various problems, one of which is water pollution in water sources because it receives a pollution load that exceeds its carrying capacity. In the context of environmental conservation, the government has set quality standards for liquid waste produced by various industries and other activities in a Decree of the State Minister for the Environment. COD (Chemical Oxygen Demand) is one of the most important parameters in wastewater quality standards. This study aims to validate the COD analysis method which refers to COD Thermoreactor System (LOVIBOND brand)

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Jiao, Nianzhi, Jihua Liu, Bethanie Edwards, et al. "Correcting a major error in assessing organic carbon pollution in natural waters." Science Advances 7, no. 16 (2021): eabc7318. http://dx.doi.org/10.1126/sciadv.abc7318.

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Microbial degradation of dissolved organic carbon (DOC) in aquatic environments can cause oxygen depletion, water acidification, and CO2 emissions. These problems are caused by labile DOC (LDOC) and not refractory DOC (RDOC) that resists degradation and is thus a carbon sink. For nearly a century, chemical oxygen demand (COD) has been widely used for assessment of organic pollution in aquatic systems. Here, we show through a multicountry survey and experimental studies that COD is not an appropriate proxy of microbial degradability of organic matter because it oxidizes both LDOC and RDOC, and

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