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Artículos de revistas sobre el tema "Nitrifikace"
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Jedličková, Věra y Petr Hlavínek. "OPTIMALIZACE PROCESŮ V AKTIVAČNÍ NÁDRŽI". Czech Journal of Civil Engineering 1, n.º 2 (31 de diciembre de 2015): 45–50. http://dx.doi.org/10.51704/cjce.2015.vol1.iss2.pp45-50.
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Trendem dnešní doby je nejen zefektivňovat, ale i šetřit náklady. Tento článek je zaměřený na snížení nákladů na provoz čistírny odpadních vod. Čist.renský proces je nepřetržitým procesem vyžadujícím pro svou funkci elektrickou energii. Největší množství elektrické energie je spotřebováno v aktivační nádrži, kde je nutné provzdušňování. Zmíněné energetické náklady se v mnoha případech dají snížit pouhou optimalizací procesů v aktivační nádrži. V případě našeho výzkumu se jedná o řízení aerace pomocí pevného nastavení doby nitrifikace a denitrifikace, kdy na základě předchozího pozorování byla snížena doba provzdušnění. Následně bylo prokázáno, že došlo ke třetinovému snížení elektrické energie spotřebované pro aktivační nádrž a to bez jakéhokoliv zhoršení odtokových parametrů.
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Hendrawan, Arya Ksatria Fernanda, Norma Afiati y Arif Rahman. "Laju Nitrifikasi pada Bioremediasi Air Limbah Organik Menggunakan Chlorella sp. dan Bakteri Nitrifikasi-Denitrifikasi". Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 11, n.º 2 (12 de agosto de 2021): 309–23. http://dx.doi.org/10.29244/jpsl.11.2.309-323.
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Pencemaran nitrogen secara global begitu meningkat akibat pembuangan air limbah organik bersumber dari aktivitas manusia yang mencemari lingkungan perairan. Peningkatan senyawa nitrogen secara terus menerus dan dalam waktu yang lama menjadi penyebab terjadinya eutrofikasi dan kematian organisme. Proses reduksi nitrogen pada air limbah dapat dilakukan secara ekonomis dan efisien menggunakan bakteri nitrifikasi-denitrifikasi. Teknologi ramah lingkungan yang juga dapat digunakan adalah bioremediasi menggunakan mikroalga seperti Chlorella sp. Adanya hubungan sinergis dari bakteri dan mikroalga berpotensi meningkatkan kinerja reduksi senyawa nitrogen pada air limbah organik. Penelitian yang dilakukan pada bulan Juli hingga Agustus 2020 ini, bersifat eksperimental laboratoris menggunakan Rancangan Acak Kelompok, bertujuan untuk mengetahui laju nitrifikasi dan perubahan kadar nitrat, laju pertumbuhan Chlorella sp., serta pengaruh perbedaan perlakuan dan waktu terhadap perubahan kadar nitrat pada air limbah organik dan hubungan Chlorella sp. dengan bakteri nitrifikasi-denitrifikasi. Air limbah yang diambil berasal dari danau Rawa Pening. Hasil penelitian menunjukkan, laju nitrifikasi secara berturut-turut dari yang tertinggi hingga terendah yaitu perlakuan C 0,2 mg NH4-N/liter/jam, diikuti perlakuan B, D dan A masing-masing 0,169, 0,009 dan 0,008 mg NH4-N/liter/jam. Pola pertumbuhan Chlorella sp. mengalami peningkatan hingga hari puncak (hari ke 6) dan menurun hingga hari terakhir. Persentase perubahan kadar nitrat dari awal hingga akhir pengamatan dari yang tertinggi secara berurutan yaitu perlakuan C (1874%), B (1664%), D (200%) dan A (175%). Hasil analisis sidik ragam menunjukkan terdapat perbedaan antara perlakuan terhadap perubahan kadar nitrat (p value <0,05). Hasil Uji DMRT menunjukkan rata-rata perubahan tertinggi adalah perlakuan C, B, D dan A.
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Sahribulan, Sahribulan, Ni’matuzahroh Ni’matuzahroh y Tini Surtiningsih. "Pengaruh Paparan Paraquat terhadap Populasi Bakteri yang Berperan sebagai Dekomposer, Pelarut Fosfat, dan Nitrifikasi pada Tanah Perkebunan Desa Batetangnga Sulawesi Barat". bionature 20, n.º 2 (8 de diciembre de 2019): 79. http://dx.doi.org/10.35580/bionature.v20i2.11276.
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Abstrak. Paraquat adalah herbisida yang digunakan secara luas untuk mengontrol pertumbuhan gulma. Penggunaan paraquat dalam jangka panjang dapat mengganggu keseimbangan ekosistem termasuk mikroorganisme tanah karena keberadaan residunya di dalam tanah. Penelitian ini bertujuan untuk mengevaluasi pengaruh paparan herbisida paraquat terhadap populasi bakteri yang berperan sebagai dekomposer, pelarut fosfat, dan nitrifikasi pada tanah perkebunan. Penelitian ini merupakan penelitian observasional. Pengaruh paparan paraquat terhadap populasi mikroba dievaluasi dari nilai Total Plate Count (CFU/g Tanah). Bakteri yang berperan sebagai dekomposer, pelarut fosfat, dan nitrifikasi pada tanah yang terpapar dan yang tidak terpapar herbisida paraquat. Data penelitian dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa nilai TPC populasi bakteri yang berperan sebagai dekomposer, pelarut fosfat dan nitrifikasi diantaranya bakteri amilolitik, selulolitik, proteolitik, lipolitik, pelarut fosfat, dan penambat nitrogen pada tanah yang tidak terpapar herbisida paraquat masing-masing sebesar 7.34, 7.04, 7.48, 7.04, 7.77, dan 5.00 (CFU/g). Sedangkan pada tanah yang terpapar herbisida paraquat masing-masing sebesar 6.42, 6.04, 6.25, 6.41, 6.29, dan 4.85 (CFU/g). Kata kunci: paraquat, populasi bakteri, dekomposer, pelarut fosfat, nitrifikasi.
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Widanarni, Sugiyo Hadi Pranoto y Sukenda. "Selection of nitrification and denitrification bacteria with its application in culture medium of Pacific white shrimp (Litopenaeus vannamei)". Jurnal Akuakultur Indonesia 9, n.º 2 (27 de marzo de 2013): 184. http://dx.doi.org/10.19027/jai.9.184-195.
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<p>The aim of this study was to obtain nitrification and denitrification bacteria and tested its activity in reducing the ammonia, nitrite and nitrate compounds in culture medium of Pacific white shrimp Litopenaeusvannamei. The research was conducted through several steps: 1) Isolation of nitrification and denitrification bacteria from ponds and mangrove areas, 2) Selection of nitrification and denitrification bacteria in vitro, and 3) test of the nitrication and denitrification bacteria activities in culture medium of white shrimp. A total of 38 isolates of nitrification bacteria and 7 isolates of denitrification bacteria were successfully isolated from ponds and mangrove areas in the region of South Lampung and Subang, West Java. Of the total isolates were then selected in vitro based on its ability to reduce the compounds of ammonia, nitrite and nitrate and selected each 2 of the best isolates. Two select nitrification bacteria isolates, namely S11 and S12 each can oxidize ammonia at 78.25% and 80.54%, whereas two select denitrification bacteria isolates namely DS7 and DS3 each can reduce nitrate amounted to 85.41%, and 56, 49%. The test results of nitrification and denitrification bacteria activities in culture medium of white shrimp showed that S12-DS7 treatments gave the best result, with ammonia concentrations between 0.007 - 0.13 mg / l, nitrite of 0.04 -2.34 mg / l, nitrate of 1 0.33 - 3, 29 mg / l, shrimp growth rate of 2.1%, and survival rate of 90%.<br /><br />Keywords: nitrification, denitrification, Litopenaeus vannamei, water quality.</p><p> </p><p><strong>ABSTRAK</strong><br /><br />Penelitian ini bertujuan untuk mendapatkandan menguji aktivitasbakteri nitrifikasi dan denitrifikasi dalam mengurangi senyawa amonia, nitrit dan nitrat pada media budidaya udang vaname Litopenaeus vannamei. Penelitian dilakukan melalui beberapa tahap yaitu: 1) Isolasi bakteri nitrifikasi dan denitrifikasi dari lingkungan tambak dan mangrove, 2) Seleksi bakteri nitrifikasi dan denitrifikasi secara in vitro, dan 3) Uji aktivitas bakteri nitrifikasi dan denitrifikasi pada media budidaya udang vaname.Sebanyak 38 isolat bakteri nitrifikasi dan 7 isolat bakteri denitrifikasi berhasil diisolasi dari lingkungan tambak dan mangrove di daerah Lampung Selatan dan Subang, Jawa Barat. Dari total isolat tersebut kemudian diseleksi secara in vitro berdasarkan kemampuannya dalam menurunkan senyawa amonia, nitrit dan nitrat dan dipilih masing-masing 2 isolat terbaik. Dua isolat bakteri nitrifikasi terseleksi yaitu S11 dan S12 masing-masing dapat mengoksidasi amonia sebesar 78,25% dan 80,54%, sedangkan dua isolat bakteri denitrifikasi terseleksi yaitu DS3 dan DS7 masing-masing dapat mereduksi nitrat sebesar 85,41% dan 56,49%. Hasil uji aktivitas bakteri nitrifikasi dan denitrifikasipada media budidaya udang vaname menunjukkan bahwa perlakuan S12-DS7 memberikan hasil terbaik, dengan konsentrasi amonia berkisar antara 0,007-0,13 mg/l, nitrit 0,04-2,34 mg/l, nitrat 1,33-3,29mg/l,laju pertumbuhan udang sebesar 2,1%, dan kelangsungan hidup 90%.<br /><br />Kata kunci: nitrifikasi, denitrifikasi, Litopenaeus vannamei, kualitas air<br /></p>
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Purwandari, Yusrianti, Pujiono Wahyu Purnomo y Mustofa Nitisupardjo. "HUBUNGAN ANTARA TOTAL BAKTERI DENGAN BAHAN ORGANIK, NO3 DAN H2S PADA LOKASI SEKITAR ECENG GONDOK DAN PERAIRAN TERBUKA DI RAWA PENING". Management of Aquatic Resources Journal (MAQUARES) 2, n.º 3 (29 de agosto de 2013): 85–92. http://dx.doi.org/10.14710/marj.v2i3.4186.
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Fenomena eutrofikasi di perairan Rawa Pening dapat dikatakan telah mencapai tahap akut. Hal ini dapat dilihat dari melimpahnya populasi tanaman Eceng Gondok (Eichhornia crassipes) yang menutupi sebagian kawasan Rawa Pening. Pertumbuhan Eceng Gondok yang tidak terkendali akan mempengaruhi ekosistem danau Rawa Pening.Hal tersebut dapat mengakibatkan terjadinya defisit oksigen (O2) dan terganggunya proses nitrifikasi. Apabila hal ini terjadi secara terus-menerus dapat terjadi potensi bahaya pendangkalan. Proses nitrifikasi sendiri tidak terlepas dari bakteri, proses nitrifikasi merupakan proses yang mengubah ammonia menjadi nitrat dengan bantuan bakteri. Penelitian ini menggunakan metode studi kasus dan metode sampling menggunakan purposive sampling. Lokasi penelitian terdiri dari 2 stasiun yaitu kawasan perairan terbuka dan kawasan tutupan Eceng Gondok. Data yang diukur meliputi total bakteri, bahan organik, NO3, H2S, kedalaman, kecerahan, arus, suhu, pH dan DO. Hasil penelitian menunjukkan bahwa kandungan bahan organik tergolong tinggi. Hal ini berbanding lurus dengan total bakteri di perairan Rawa Pening yang tinggi. Kandungan NO3 pada perairan iniberkisar antara 0,088 – 0,279 mg/l. Sedangkan kandungan H2S berkisar antara 0,009 – 0,015 mg/l.
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Sidik, A. S., ,. Sarwono y ,. Agustina. "The Effect of Stocking Density on Nitrification Rate in a Closed Recirculating Culture System". Jurnal Akuakultur Indonesia 1, n.º 2 (7 de agosto de 2007): 47. http://dx.doi.org/10.19027/jai.1.47-52.
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<p>ABSTRACT</p><p>Nitrification rate in a closed recirculating water system with different stocking density of common carp (Cyprinus carpio L.) had been observed in the Laboratory of Aquaculture, Faculty of Fisheries and Marine Science, Mulawarman University. Fish were cultivated in rounded tanks with four level of stocking densities i.e. 10, 20, 30 and 40 fish/100 l in a closed recirculting water system, and fed on a commercial pellet given thrice a day at a quantity of 5% from the total body weight of fish per day. The experiment was designed completely randomized with three replications. Nitrification rate was calculated stoichiometrically through the determination of ammonia and nitrite oxidation rate. Results showed that in this experiment the ammonia and nitrite oxidation rate, and nitrification rate in a closed recirculating water system was increased with the increasing stocking density of fish. On the contrary, the growth of fish was decreased with the increasing of stocking density.</p><p>Key words : Nitrification rate, stocking density, recirculation system, common carp (Cyprinus carpio L.).</p><p> </p><p>ABSTRAK</p><p>Laju nitrifikasi dalam budidaya sistem resirkulasi air tertutup dengan padat penebaran ikan mas (Cyprinus carpio L.) yang berbeda telah diamati di Laboratorium Budidaya Perairan, Fakultas Perikanan dan Ilmu Kelautan Universitas Mulawarman. Ikan dipelihara dalam tong plastik dengan empat tingkat padat penebaran, yaitu 10, 20, 30 dan 40 ekor/100 l, dan diberi makan pelet komersial tiga kali sehari dengan jumlah 5 % dari berat badan ikan per hari. Penelitian ini dirancang secara acak lengkap dengan tiga ulangan. Laju nitrifikasi dihitung secara stoikiometrik melalui penentuan laju oksidasi amoniak dan nitrit. Hasil penelitian menunjukkan bahwa laju oksidasi amoniak dan nitrit serta laju nitrifikasi dalam sistem resirkulasi air tertutup meningkat dengan meningkatnya padat penebaran. Sebaliknya pertumbuhan ikan menurun dengan meningkatnya padat penebaran.</p><p>Kata kunci : Laju nitrifikasi, padat penebaran, sistem resirkulasi, ikan mas (Cyprinus carpio L.).</p>
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Pujihastuti, Yuni Puji. "Nitrification and denitrification in pond". Jurnal Akuakultur Indonesia 10, n.º 1 (1 de enero de 2011): 89. http://dx.doi.org/10.19027/jai.10.89-98.
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<p>More of waste than pond aquacultutre system produced, will increase sedimentation in the bottom. Ammonium and nitrite compounds are other forms of inorganic nitrogen in the pond. Nitrogen anorganic consist of ammonia, ammonium, nitrit, nitrat and nitrogen. Degradation of process metabolic biota culture waste can biologically be nitrat compound one of the forms that are not toxic in the nitrification process. Five process of nitrogen biogeochemical cycle in the container cultivation is the amonification, nitrification, nitrogen assimilation, denitrification and nitrogen fixation. Nitrogen is the one of the compound in the overlay/ top stratification sediment. Improvement of speed degradation will be success if the pond bottom on aerobic condition. Survival rate of tiger shrimp in the laboratory scale can be increase by administration of nitrification and denitrification bacteria should not just in the water kolom of pond engineering but also at the bottom pond layer at the preparation step. Depht of the sediment 15 cm in day zero, intensive pond have been produced of nitrit and ammonium with the producing bacteria. Application of nitrification and denitrification bacteria in the sediment and water coloum can be performed as the measurenment and evaluation nitrit, nitrat and ammonium abudance.</p> <p>Key words: ponds, nitrogen inorganic, nitrification, denitrification</p> <p><em> </em></p> <p>ABSTRAK</p> <p>Semakin banyak limbah kegiatan yang dihasilkan dalam sistem budidaya tambak, akan meningkatkan sedimentasi dalam dasar tambak. Senyawa amonium dan nitrit merupakan bentuk lain dari nitrogen anorganik dalam tambak. Nitrogen anorganik terdiri terdiri dari amonia (NH<sub>3</sub><sup>-</sup>), amonium (NH<sub>4</sub><sup>+</sup>), nitrit (NO<sub>2</sub><sup>-</sup>), dan nitrogen (N<sub>2</sub>). Secara biologis, proses perombakan sisa metabolisme biota budidaya dapat menjadi nitrat (NO<sub>3</sub>), suatu bentuk yang tidak berbahaya dalam proses nitrifikasi. Lima proses siklus biogeokimia nitrogen yang terjadi di wadah budidaya adalah amonifikasi, nitrifikasi, asimilasi nitrogen, denitrifikasi, dan fiksasi nitrogen. Nitrogen merupakan senyawa yang biasanya terletak di lapisan paling atas dalam sedimen. Peningkatan kecepatan degradasi akan dapat dicapai jika sedimen berada dalam kondisi aerobik. Tingkat kelangsungan hidup udang pada uji skala laboratorium memperlihatkan bahwa penambahan bakteri nitrifikasi dan denitrifikasi terseleksi dapat meningkatkan kelangsungan hidup udang windu Aplikasi pemberian bakteri nitrifikasi dan denitrifikasi tidak seharusnya hanya dalam air saja, namun juga dalam pengolahan tanah dasar tambak. Pada kedalaman sedimen 15 cm hari ke-0, tambak intensif telah terdapat bakteri penghasil nitrit dan amonium dan kelimpahannya semakin meningkat seiring dengan bertambahnya umur udang. Aplikasi pemberian bakteri nitrifikasi dan denitrifikasi di sedimen dan kolom perairan dapat dilakukan seiring dengan pengukuran dan evaluasi kondisi nitrit, nitrat dan ammoniumnya. Secara alami, dalam kolom perairan telah terdapat senyawa nitrit, nitrat dan amonium, seberapapun itu perlu diimbangi dengan kebijakan dalam pemberian bakteri dari luar.</p> <p>Kata kunci: tambak, nitrogen anorganik, nitrifikasi, denitrifikasi</p>
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Juliastuti, S. R., J. Baeyens, C. Creemers y J. Degreve. "Determination of rate parameter for kinetics of nitrification". Jurnal Teknik Kimia Indonesia 4, n.º 2 (2 de octubre de 2018): 234. http://dx.doi.org/10.5614/jtki.2005.4.2.7.
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Determination of rate parameter for kinetics of nitrification The nitrification process is the bottleneck step in the total nitrogen removal. The formation of nitrate is considered as the rate limiting step in the whole process and its kinetics determine the design of the nitrification reactor. Heavy metals (Zn2+ and Cu2+) and different organic compounds are used as micropollutants. These kinetics were experimentally measured by respirometry. In line with the aim of the paper, the experimental investigation are conducted to develop design equations to describe kinetic rate relationships under optimum conditions, study the parameter influence such as pH and inhibition by reaction intermediates and inhibition by external pollutants. Results demonstrate that the maximum value of the specific growth rate of autotrophic biomass() is 1.02 day at pH=7 and decreases at pH 7.5; inhibition occurs at substrate (NH4) concentrations in excess of 15 mg N/l; inhibition occurs at increasing concentrations of NO –N and Cu2+ has more pronounced inhibitory effect than Zn2+. The inhibitory effect of organic compounds are listed as the Chlorobenzene > Trichloroethylene> Phenol> Ethyl benzene; the experimental oxygen uptake rate (OUR)-test results the autotrophic kinetic parameter values, which can be used in design equations. Keywords: Respirometry, Autotrophic Biomass, Nitrification, Oxygen Uptake Rate Abstrak Proses nitrifikasi merupakan langkah penting pada penurunan kadar total nitrogen. Pembentukan nitrat dianggap sebagai tahap pembatas kecepatan reaksi pada keseluruhan proses dan kinetikanya menentukan perancangan dari bagian proses nitrifikasi. Logam berat (Zn2+ dan Cu2+) dan berbagai jenis komponen organik digunakan sebagai mikropolutan. Kinetika ini secara eksperimental diukur menggunakan respirometer. Tujuan penelitian adalah mengembangkan persamaan perancangan yang menggambarkan hubungan laju kinetika pada kondisi optimum, studi pengaruh parameter seperti pH, inhibisi karena reaksi intermediat, dan inhibisi oleh polutan dari luar. Hasil penelitian ditunjukkan sebagai berikut: harga laju pertumbuhan biomasa autotrof maksimum spesifik adalah 1,02 hari-1 pada pH=7 dan menurun pada pH 7,5; inhibisi terjadi pada konsentrasi substrat (NH4+) lebih besar dari 15 mg N/l; inhibisi terjadi pada peningkatan konsentrasi NO -N ;Cu2+ lebih dikenal sebagai penyebab inhibisi daripada Zn2+. Efek inhibisi dari komponen organik di daftar mulai dari Chlorobenzene sampai Ethylbenzen. Tes OUR menghasilkan harga parameter kinetika yang dapat dipakai pad apersamaan perencanaan lumpur aktif nitrifikasi. Kata Kunci: Respirometer, BiomasaAutotrof, Nitrifikasi, Laju Kenaikan Oksigen
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Yosmaniar, Yosmaniar, Hessy Novita y Eri Setiadi. "ISOLASI DAN KARAKTERISASI BAKTERI NITRIFIKASI DAN DENITRIFIKASI SEBAGAI KANDIDAT PROBIOTIK". Jurnal Riset Akuakultur 12, n.º 4 (18 de enero de 2018): 369. http://dx.doi.org/10.15578/jra.12.4.2017.369-378.
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Senyawa nitrogen yang tinggi pada limbah budidaya perikanan intensif dapat memperburuk kualitas air, sehingga perlu diatasi dengan penambahan probiotik untuk proses bioremediasi. Tujuan penelitian ini adalah untuk mendapatkan bakteri nitrifikasi dan denitrifikasi yang berpotensi sebagai kandidat probiotik pengendali senyawa nitrogen pada budidaya ikan air tawar. Tahap penelitian terdiri atas: 1) koleksi sampel air dan sedimen dari kolam budidaya ikan patin di kawasan minapolitan Desa Pudak Kecamatan Kumpeh Kabupaten Muaro Jambi Provinsi Jambi dan Desa Koto Mesjid Kecamatan XIII Koto Kampar Kabupaten Kampar Provinsi Riau; 2) pengujian sampel secara in vitro yang meliputi: a) Isolasi dan seleksi bakteri nitrifikasi dan denitrifikasi; b) Karakterisasi morfologis bakteri terpilih; c) Karakterisasi fisiologi/biokimia isolat bakteri terpilih; d) Karakterisasi genetika isolat bakteri terpilih dengan sekuensing 16S-rRNA. Analisis data dilakukan secara deskriptif. Berdasarkan hasil penelitian diperoleh empat isolat bakteri nitrifikasi dan empat isolate bakteri denitrifikasi. Isolat bakteri nitrifikasi Pandoraea pnomenusa strain 1318 (NP1); Pseudomonas aeruginosa strain PSE12 (NP2); Pseudomonas aeruginosa strain PSE12 (NP3); Burkholderia vietnamiensis strain NE 7 (NP4); dan denitrifikasi Achromobacter xylosoxidans strain TPL14 (DP1); Stenotrophomonas acidaminiphila strain BTY (DP2); Stenotrophomonas maltophilia strain BHWSL2 (DP3); Ochrobactrum intermedium strain: SQ 20 (DP4) Achromobacter xylosoxidans strain TPL14 (DP1); Stenotrophomonas acidaminiphila strain BTY (DP2); Stenotrophomonas maltophilia strain BHWSL2 (DP3); Ochrobactrum intermedium strain: SQ 20 (DP4); yang berpotensi digunakan sebagai kandidat probiotik pengendali senyawa nitrogen pada budidaya ikan air tawar. Wastes from an intensive aquaculture contain nitrogen compounds which, if untreated, could rapidly reduce water quality condition within the system. The addition of probiotics as bioremediation to aquaculture system has been used to improve water quality with promising results. The aim of this study was to obtain potential nitrifying and denitrifying bacteria that could be used as probiotic candidates to control excessive nitrogen compounds in freshwater culture. This study consisted of two steps, 1) the collection of water samples and sediments from catfish ponds at ‘Minapolitan Area” in Pudak Village, Jambi Province and Koto Mesjid Village, Riau Province; 2) in vitro tests consisting of isolation and selection of nitrifying and denitrifying bacteria; morphological characterization of the selected nitrifying and denitrifying bacteria; characterization of physiological/biochemical selected nitrifying and denitrifying bacteria; genetic characterization of the selected nitrifying and denitrifying bacteria with 16SrRNA sequencing. All data were analyzed descriptively. The study had found four nitrifying bacteria isolates: Pandoraea pnomenusa strain 1318 (NP1); Pseudomonas aeruginosa strain PSE 12 (NP2); Pseudomonas aeruginosa strain PSE12 (NP3); Burkholderia vietnamiensis strain NE 7 (NP4). The study also found four isolates of denitrifying bacteria isolates: Achromobacter xylosoxidans strain TPL14 (DP1); Stenotrophomonas acidaminiphila strain BTY (DP2); Stenotrophomonas maltophilia strain BHWSL2 (DP3); Ochrobactrum intermedium strain: SQ 20 (DP4). All the identified nitrifying and denitrifying bacteria isolates have the potential to be used as probiotic candidates to control nitrogen compound in freshwater aquaculture.
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Satria, Arysca Wisnu, Merza Rahmawati y Agus Prasetya. "Pengolahan Nitrifikasi Limbah Amonia dan Denitrifikasi Limbah Fosfat dengan Biofilter Tercelup". Jurnal Teknologi Lingkungan 20, n.º 2 (31 de julio de 2019): 243. http://dx.doi.org/10.29122/jtl.v20i2.3479.
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ABSTRACTWater pollution is a problem that often arises and gives a serious impact to the environment. Therefore, it should be reduced by conventional methods or modern methods. The submerged biofilter is a biological waste treatment plant that utilizing microorganisms grown in a packing medium. The advantages of submerged biofilter as a waste treatment plant are easy to use and low energy consumption so the operational cost is cheaper. This study aims to determine the operational parameters of the submerged biofilter and to develop a model that can be used to estimate the rate of elimination of each pollutant using nitrification reactor for ammonia and denitrification reactor for phosphate. The experiments were conducted with draining the wastewater in a cylindrical bio-filter column in which the hight is 90 cm. At first, the microorganism was grown for two weeks with the residence time of one day. Furthermore, the wastewater removals are conducted with hydraulic loading rate (HLR) variation of 0.44; 0.55; 0.74; 1.11; 1.66; 2.21; and 3.32 m3/m2/day. Then the effluent from the outlet is analyzed using UV-Vis Spectrophotometer. The results showed that the optimum ammonia and phosphate removal was obtained in 0.44 m3/m2/day for ammonia removal and 1.66 m3/m2/day for phosphate removal. While the removal of ammonia and phosphate percentage from both conditions are 97.41% and 27.16% respectively. The changes of HLR will give an effect on substrate reduction rate (SRR), and the percentage of substrate removal. The model developed based on efficiency factors presented a good approach to represent the concentration of substrate effluent at various HLR. Keywords: wasteswater, nitrification, denitrification, submerged biofilter ABSTRAKPencemaran air merupakan permasalahan yang sering muncul dan berpengaruh serius pada lingkungan. Oleh karena itu, perlu dilakukan usaha yang berkelanjutan untuk dapat mengurangi dampak dari pencemaran tersebut, baik dengan cara-cara konvensional maupun inovasi teknologi terbaru. Biofilter tercelup (submerged biofilter) adalah suatu alat pengolah limbah secara biologi dengan memanfaatkan mikroorganisme yang ditumbuhkan dalam media packing di dalamnya. Kelebihan penggunaan biofilter tercelup sebagai alat pengolah air limbah adalah pengelolaannya yang mudah dan konsumsi energi yang rendah sehingga biaya operasionalnya murah. Penelitian ini bertujuan untuk mengetahui parameter operasional biofilter tercelup dan mengembangkan model untuk memperkirakan laju penyisihan setiap polutan menggunakan reaktor nitrifikasi untuk limbah amonia dan reaktor denitrifikasi untuk fosfat. Percobaan dilakukan dengan mengalirkan limbah pada sebuah kolom biofilter berbentuk silinder dengan ketinggian 90 cm. Pada mulanya mikroorganisme ditumbuhkan dengan mengalirkan limbah selama dua minggu dengan waktu tinggal cairan satu hari. Selanjutnya dilakukan penyisihan limbah dengan variasi kecepatan beban hidrolik (HLR) sebesar 0,44; 0,55; 0,74; 1,11; 1,66; 2,21; dan 3,32 m3/m2/hari. Effluent dari keluaran reaktor kemudian dianalisis menggunakan Spektrofotometer UV-Vis. Hasil penelitian menunjukkan bahwa kondisi optimum penyisihan amonia dan fosfat adalah 0,44 m3/m2/hari untuk penyisihan amonia dan 1,66 m3/m2/hari untuk penyisihan fosfat. Persentase removal amonia dan fosfat dari kedua kondisi tersebut berturut-turut sebesar 97,41% dan 27,16%. Perubahan HLR berpengaruh terhadap kecepatan penyisihan limbah (SRR), dan persentase limbah tersisihkan. Model yang dikembangkan berdasarkan faktor efisiensi memberikan hasil yang cukup baik untuk merepresentasikan besarnya konsentrasi effluent limbah pada berbagai variasi HLRKata kunci: limbah cair, nitrikasi, denitrifikasi, biofilter tercelup
Tesis sobre el tema "Nitrifikace"
1
Kyselová, Aneta. "Faktory ovlivňující zastoupení konečných produktů nitrifikace při biologické předúpravě fugátu". Master's thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-257719.
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In this diploma thesis, the influence of chemical composition of fugate, pH value, temperature and other factors on representation of final products of nitrification during biological pretreatment of fugate produced in agricultural biogas stations was evaluated.
During the experiment, fugate from biogas station Nový Dvůr with N-amon concentration in the range of 1300 - 3200 mg/l at input was processed. Results from the time period beginning on 21. September 2015 and ending on 22. December 2015 (day 0 - 93) were assessed. Nitrification reactor of five liter operational volume was placed in a laboratory at temperatures ranging from 20.4 to 25.2 degrees Celsius. During the experiment, volumetric loading of N-amon reactor ranged from 0,18 to 0,44 kg/(m3.d) and efficiency of N-amon removal from 68,6 to 96,9 percent. Hydraulic period of water delay was being decreased from 12,3 days to approximately 4,2 days during the experiment. pH value was regulated by NaOH to be approximately 7.
The experiment proved that it was possible to attain the process of nitrification in the aggressive medium of fugate. It was ascertained that pH value, which determined current concentration of Free Nitrous Acid (FNA), had significant influence on representation of final products of nitrification. Concentrations of N-NO2 in the reflux from the reactor were being increased from 130 up to 1840 mg/l during the process on the grounds of pH value fluctuations and increasing FNA concentration which inhibited activity of nitrite oxidizing bacteria (NOB). The representation of N-NO2 from day 0 to day 93 of the experiment gradually increased from 19 percent up to 95 percent. Concentrations of N-NO3 from day 0 to day 3 increased from 570 to 1056 mg/l and conversely from day 3 to day 93 they gradually decreased from 570 mg/l to approximately 100 mg/l. Representation of N-NO3 decreased from 80 percent to 5 percent from day 0 to day 93 and it was not possible to retain them as dominant products of nitrification on the ground of sensitivity of NOB.
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Radechovský, Josef. "Faktory ovlivňující průběh odstraňování dusíkatého znečištění z odpadních vod specifického složení". Doctoral thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-259627.
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Abstract:
This work summarizes the current knowledge about removing of nitrogen compounds from wastewater using non-traditional biological methods. They include for example process of nitritation/denitritation and a process of deammonification. Special innovative biological methods are economically advantageous because of savings of oxygen for the oxidation of N-ammon and organic substrate for the formation of N2.
Achieving of accumulation of nitrites (achieving of shortcut nitrification) due to suppression of nitrite oxidising bacteria (NOB) is the basis of methods mentioned above. Stable shortcut nitrification is influenced by many factors and achieving of this process in a low-strength wastewater is still problematic, so some new procedures how to optimize it are investigated. This was also the main aim of research that was realized at the Department of Agroenvironmental Chemistry and Plant Nutrition of the Czech university of Life Sciences in Prague.
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Hejsková, Pekárková Marie. "Vodní hospodářství malých savců v ZOO Brno". Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216850.
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Master's thesis deals with water utilization in exposition of arctic wolf and canadian beaver in ZOO Brno. Theoretical part describes water utilization in ZOO and processes in water connected with nutrient enriching and uprising of water bloom. Practical part focuses on monitoring water quality in April and May 2012 and concept to solute water filtration in ponds.
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Brychtová, Martina. "Faktory ovlivňující zapracování a účinnost nitrifikačního procesu při biologické předúpravě fugátu". Master's thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-257721.
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The thesis deals with assessment of the effect of pH value, temperature, concentration of toxic forms of nitrogen, concentration of dissolved oxygen and other factors on the process of start-up of the nitrification reactor serving for biological pre-treatment of fugate. Another objective of this thesis is to assess the effect of the conditions prevailing in the reactor on the efficiency of transformation of N-ammon to oxidized forms of nitrogen.
During the system start-up, nitrifying activated sludge sampled from the regeneration zone of the activation process at the Central Waste Water Treatment Plant in Prague was used as inoculum. The laboratory model with suspended biomass consisted of a nitrification
reactor, the working volume of which was 1.5 l in the first part of the experiment and 5 l in the second part of the experiment. The system start-up lasted from 17 April 2015 to
approximately 12 May 2015 (days 0 to 32). N-ammon concentration in the inflow ranged from 1660 mg/l to 3000 mg/l. Volume loading of ammonia-nitrogen in the reactor ranged from 0.1 to 0.4 kg/(m3.d). During the experiment, the dissolved oxygen concentration ranged 3.6 to 6.8 mg/l, and the temperature range was 23 C°.
The performed experiment confirmed that it is possible to start up and maintain longterm the nitrification process also in fugate from a biogas station. It has been proved that despite the extreme characteristics of fugate, the nitrification process can be incorporated from the first days of the reactor operation. From the beginning of the experiment, N-NO3 was abundantly generated. N-ammon oxidizing efficiency ranged between 90 and 99 % and
influenced particular by pH values.
5
Krupica, Radek. "Návrh čistírny odpadních vod v lokalitě s extrémními požadavky na jakost vyčištěných vod". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226160.
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This diploma thesis deals with the wastewater treatment technologies by means of which high quality of the treated wastewater is attained, especially with regard to removing nutrients. The introduction of the thesis contains, among others, descriptions of the reserves in the Czech Republic where it is extremely important to insist on the highest quality of the discharged wastewaters. Then follows a summary of the quality requirements on the discharged wastewaters as stipulated in the legislation. Furthermore, I analyse the impact of the nutrients – nitrogen and phosphorus – on the environment and the principles of their removal from the wastewaters. In the next section I concentrate on the technological processes by means of which the required quality of the wastewater is achieved. The conclusion includes a list of technologies used as the tertiary wastewater treatments with emphasis on membrane technologies. The second part of my thesis is a study of a project of a wastewater treatment plant (WWTP) with membrane technology for the villages of Sloup and Šošůvka located within the protected landscape area of Moravian Karst.
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Střalková, Radomíra. "Dynamika nitrifikace v orných půdách". Doctoral thesis, 2002. http://www.nusl.cz/ntk/nusl-87797.
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Mrázová, Kateřina. "Vliv klimatických výkyvů na dostupnost dusíku pro rostliny". Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-92939.
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Vícha, Lukáš. "Vliv dusíkato-sirného hnojiva s inhibitorem nitrifikace na výnos a kvalitu zrna pšenice ozimé". Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-427901.
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This diploma thesis examines an impact of a nitrogen-sulphur fertilizer with and without a nitrification inhibitor on a yield and quality of a winter wheat grain. From a qualitative feature there has been observed an impact of fertilizers on a volume weight, nitrogen substances, gluten and sedimentation value. The research was conducted in a form of small fields experiment in a business year 2015/2016, 2016/2017 and 2017/2018 in a different localities. The first locality can be found on a South Moravia region specifically at experimental fields of School agricultural enterprise in Žabčice and the second is at Research fodder plants station in Vatín in Vysočina. There has been included five different variants in a research. 1. Unfertilized, 2. CAN + CAN, 3. ANAS + CAN (ammonium nitrate + ammonium sulfate), 4. CAN + ANAS, 5. CAN + ENSIN (ammonium nitrate + ammonium sulfate + inhibitor of nitrification). The results show, that an influence of fertilizer was influenced by a weather conditions in a particular year, when was yield increased in a 2016/2017 by 30 % against a previous year. The yield was also influenced by localities in which has been held. The difference was also between individual variants of fertiliszrs where the variant LAD + ENSIN performed the best with an average yield of 8,18 t/ha. Regarding the qualitative parameters of grain there has been also differences between individual years, localities and also fertiliser variants, however some of the values did not fulfilled norms for a food wheat, so the wheat is in general evaluated as a fodder wheat because the values for the volume weight of winter wheat grain were not met. The economic profit of the research was the best in variant LAD + ENSIN, where were finally displayed transportation savings and amount of applied fertilisers.
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Bláha, Jiří. "Využití dusíkatých hnojiv s inhibitory ve výživě pšenice ozimé". Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-150546.
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Tržil, Marek. "Ovlivnění výnosu a kvality zrna pšenice ozimé použitím stabilizovaných močovin se sírou". Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-362526.
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This thesis evaluated the influence of stabilized urea with sulphur on the yield and quality of winter wheat crop. Qualitative elements were used as a method how to observe influence of fertilizers on content of nitrogenous substances, gluten and sedimentation value. Experiment was conducted through small plot field trial in agricultural years 2012/2013, 2013/2014 a 2014/2015 in two different localities. First area is located in south Moravia on property of agricultural experiment station School Farm Žabčice. Second area is located in Vatín in Vysočina region. There were six different variants enrolled in the experiment: 1. unfertilized soil, 2. ALZON 46 + Ammonium sulfate granulated 100% dosage (fertilizers ratio 1:1), 3. ALZON 46 + SA granulated 80% dosage (1:1), 4. ALZON 25 - 6S 100% dosage, 5. ALZON 25 - 6S 80% dosage, 6. Urea + SA granulated (1:1). In the experiment results were compared between fertilizers without nitrification inhibitors (urea) and fertilizers with nitrification inhibitors (ALZON 46 and ALZON 25 - 6S) in both localities. The influence based on applicated dosage on parameters listed above was observed too. Crop yield and qualitative parameters were influenced by the locality. In agricultural experiment station in Žabčice was achieved better yield with better quality of the crop. In south Moravia the best and comparable results in all observed parameters achieved ALZON 46 + SA 100 % and urea + SA. In agricultural experiment station in Vatín the best results achieved ALZON 46 + SA 100 %. In both localities the worst results were observed in ALZON 25 - 6S 80% dosage.