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Dissertations / Theses on the topic 'Anaerobic digestion sludge'

Author: Grafiati
Published: 5 September 2021
Last updated: 29 July 2025

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1

Lafitte-Trouque, Sandrine. "Enhanced anaerobic digestion of sewage sludge." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369392.

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2

Tanneru, Charan Tej. "Anaerobic and Combined Anaerobic/Aerobic Digestion of Thermally Hydrolyzed Sludge." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/45880.

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Sludge digestion has gained importance in recent year because of increasing interest in energy recovery and public concern over the safety of land applied biosolids. Many new alternatives are being researched for reducing excess sludge production and for more energy production. With an increase in solids destruction, the nutrients that are contained in sludge especially nitrogen, are released to solution and can be recycled as part of filtrate or centrate stream. Nitrogen has gained importance because it has adverse effects on ecosystem's as well as human health. NH₄⁺, NO₂⁻, NO₃⁻-, and org
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3

Yi, Weigang. "Innovative sludge pretreatment technologies and enhanced anaerobic digestion." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43650.

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This dissertation reports the research findings from an investigation into the use of four technologies for municipal wastewater sludge pre-digestion treatment. The technologies explored include microwave, the microwave / hydrogen peroxide process, ultrasound and biological enzyme protease treatment. The general purpose of the sludge pretreatment applications is to improve anaerobic digestion efficiency in terms of biogas production, organic reduction and nutrient recovery. An examination was first carried out on the effects of these technologies on sludge solubilization (disintegration and h
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4

Yan, Jing-Qing. "Anaerobic digestion of cheese whey in an upflow anaerobic sludge blanket reactor." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/31898.

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The anaerobic digestion of cheese whey was studied in an upfiow anaerobic sludge blanket reactor for its start-up characteristics, the effects of various process parameters, the effect of sulfate addition and the determination of optimal operating conditions. Start-up of an UASB reactor treating cheese whey was extremely difficult due to its tendency to acidify. Various start-up strategies were tested to facilitate start-up and to ensure stable operation. Among the operating parameters, sludge loading rate was the most critical for proper start-up of the UASB reactor. The initial sludge loadi
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5

Premier, Giuliano C. "Toward simple generic control in anaerobic digestion." Thesis, University of South Wales, 2003. https://pure.southwales.ac.uk/en/studentthesis/toward-simple-generic-control-in-anaerobic-digestion(eb3e3942-bb11-4eb3-9831-8585bd30936e).html.

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The desirability of effective control of anaerobic digesters as a means of avoiding imbalance in the microbial population has become clearer and this can be seen from the literature in recent years. A number of published control strategies have been encouragingly successful, however the non-linear and time varying nature of the process generally requires a bespoke, engineered system dependant on the characteristics of the system. The 'cost of knowing' in employing control systems, is generally high. The ideal scenario for operators would be the availability of a generic control system at reaso
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6

Chari, Pooja Surendra. "Anaerobic Co-Digestion of Food waste and Primary Sludge." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491561610829611.

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7

Silvestre, Tormo Gracia. "Sewage sludge anaerobic digestion : study of synergies and operational strategies of co-digestion." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/334688.

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Wastewater treatment plants (WWTPs) are characterized by their high organic matter and nutrient removal efficiency, but also by their high energy consumption. In the current context where resources are increasingly scarce, all feasible strategies to save energy emerge as an important issue for the sustainable management of WWTPs. In this thesis, sewage sludge (SS) anaerobic co-digestion with available organic wastes, coming from different sources and having different compositions, was proposed as an interesting strategy to approach an energy self-sufficient scenario for wastewater treatment b
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8

Hermana, Joni. "Enhancing anaerobic digestion by manipulation of acidogenesis-methanogenesis phases during two-phase anaerobic system." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362518.

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9

Gabriel, Coelho Nuno Miguel. "Application of Microwaves and Thermophilic Anaerobic Digestion to Wastewater Sludge Treatment." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22763.

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Anaerobic digestion of waste activated sludge can be improved if hydrolysis of particulate substrates is enhanced and available substrate is made more accessible by both breakup of the sludge matrix floc and rupture of the cell wall. Microwave (MW) pretreatment was suggested and studied as a way to improve digestion efficiency. The work done focuses on the effects of MW pretreatment on the characteristics of the sludge, due to thermal and athermal effects. It also evaluates the effects some process variables in the activated sludge process have on the pretreatment efficiency as well as the eff
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10

Hamzawi, Nancy. "Anaerobic co-digestion of municipal solid waste and sewage sludge." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq21990.pdf.

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11

Wahidunnabi, Abdullahil Kafi Md. "Temperature phased anaerobic sludge digestion with high pressure homogenization pretreatment." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46126.

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12

Flisberg, Kristina. "Anaerobic Co-digestion of Sewage sludge, Algae and Coffee Ground." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10206.

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Energy shortfall and air pollution are some of the challenges the human kind is facing today. Fossil fuel is still the most widely used fuel, which is a non-renewable resource, increasing excess carbon dioxide into the air. To overcome these issues, and reduce the carbon footprint, a greater development of renewable energy from green and natural resources is required. Compared to fossil energy, renewable energy has the benefit to reduce greenhouse gas emissions. There are different solutions available for green and renewable energy. Biomass is all biologically produced matter. Through the biol
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13

Webb, Jared A. "A Comparative Study of Anaerobic Digestion Processes for Sewage Sludge." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/41131.

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The Blue Plains Wastewater Treatment Plant in Washington, D.C. is in the process of updating its anaerobic digesters, with a completion date set for 2008. This research was undertaken to aid designers at Blue Plains by evaluating alternative digestion approaches. The technologies applicable to the plant included thermophilic anaerobic digestion, acid/gas phased digestion, and temperature phased anaerobic digestion. To obtain design data, a year long study was conducted using bench scale digestion systems operating at different solids retention times (SRT) and organic loading rates (OLR).
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14

Malhotra, Saimon. "Molecular biological characterisation of the functional microbial communities in anaerobic digesters." Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272792.

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15

An, Kyoung Jin. "Reduction of excess sludge in an oxic-settling-anaerobic (OSA) system : a modified activated sludge process /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202004%20AN.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 188-201). Also available in electronic version. Access restricted to campus users.
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16

Cacho, Rivero Jesús Andrés. "Anaerobic digestion of excess municipal sludge optimization for increased solid destruction /." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1115828603.

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17

Bordeleau, Etienne Louis. "Analysis of sludge pretreatments for conventional anaerobic digestion wastewater treatment plants." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28631.

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Pretreatment of primary sludge, waste activated sludge, and comingled sludges has become of substantial interest for the improvement of the rate limiting hydrolysis step during anaerobic digestion. As primary sludges are already easily degraded, waste activated sludges provide the most noticeable improvements in anaerobic digestion (AD) as a result of sludge pretreatment (SPT). A vast literature and theory review was conducted to establish high-potential treatment and result ranges. The average wastewater compositions for total chemical oxygen demand (COD) and total solids (TS) were 16-43 and
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18

Karlsson, Robin. "Anaerobic digestion of biological sludge from the pulp and paper industry." Thesis, Linköpings universitet, Tema vatten i natur och samhälle, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-60527.

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The need for - and use of non-fossile fuels such as biogas have increased due to global warming, oil depletion and stricter environmental regulations. Organic wastes can be anaerobically digested in order to produce biogas, which can be utilized to generate heat or electricity. So far, little attention has been directed towards anaerobic digestion of organic wastes from the forest industry. Due to high sludge management costs and more rigorous environmental legislation, the demand for new and/or improved disposal methodologies has increased. Substrate treatment methods such as enzyme addition
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19

Bishnoi, Pallavi. "Effects of Thermal Hydrolysis Pre-Treatment on Anaerobic Digestion of Sludge." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/34539.

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The increased demand for advanced techniques in anaerobic digestion over the last few years has led to the employment of various pre-treatment methods prior to anaerobic digestion to increase gas production. These pre-treatment methods alter the physical and chemical properties of sludge in order to make it more readily degradable by anaerobic digestion. The thermal hydrolysis process has been used in several treatment plants around the world, but none currently operate in the US. Thermal hydrolysis causes cell walls to rupture under the effect of high temperature and high pressure and results
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20

MADHAVAN, NARAIN. "EFFECT OF CHEMICAL PRETREATMENT ON THE ANAEROBIC DIGESTION OF MUNICIPAL SLUDGE." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1092621930.

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21

CACHO, RIVERO JESUS ANDRES. "ANAEROBIC DIGESTION OF EXCESS MUNICIPAL SLUDGE: OPTIMIZATION FOR INCREASED SOLID DESTRUCTION." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1115828603.

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22

Madhavan, Narain. "Effect of chmeical pretreatment on the anaerobic digestion of muncipal sludge." Cincinnati, Ohio : University of Cincinnati, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1092621930.

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23

Ng, Bernice. "Enhancement of methane production from anaerobic digestion of wastewater treatment sludge." Thesis, Ng, Bernice (2010) Enhancement of methane production from anaerobic digestion of wastewater treatment sludge. Honours thesis, Murdoch University, 2010. https://researchrepository.murdoch.edu.au/id/eprint/38921/.

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Anaerobic digestion is a commonly used technique in treating industrial, rural effluents and sewage sludge. Methane, CH4, produced in anaerobic digestion is a valuable renewable energy source. In wastewater treatment plant (WWTP), primary and secondary sludge are produced at different stages of wastewater treatment process. They are different in terms of composition and degradability. Experiments (batch/ semi-continuous) showed that primary sludge was more degradable and produced higher methane than secondary sludge. As primary sludge is highly degradable, the possibility of increasing feed
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24

Heimel, Daniel Eric. "Anaerobic Co-digestion of Wastewater Treatment Pond Algae with Wastewater Sludge." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/440.

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Microalgae harvested from wastewater treatment ponds can be anaerobically digested to produce biogas, a renewable fuel resource. However, past experiments have shown some limitations of algae digestion. Algal cell walls are thought to be resistant to digestion, and the high protein content of algae can lead to ammonia toxicity in digesters. Co-digestion of algae with substrates containing higher C:N ratios (e.g., waste paper) can be used to maintain non-inhibitory ammonia concentrations and increase methane production. However, high carbon waste co-substrates have become costly or are not read
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25

Spierling, Ruth E. "ANAEROBIC CO-DIGESTION OF MICROALGAE WITH FOOD WASTE AND WASTEWATER SLUDGE." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/586.

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This research sought to optimize anaerobic co-digestion of microalgae biomass harvested from a wastewater treatment pond facility with locally-available wastes. The goal was to produce high methane yields and stable digestion without the need for supplemental alkalinity addition. A key research question was if algae digestion could be improved via the synergistic effects of co-digestion. Cell disruption to increase digestibility was not pursued due to its relatively high mechanical complexity and high energy use. For the wastewater treatment ponds studied, the most practical co-substrates
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26

Yeneneh, Anteneh Mesfin. "Study on performance enhancement of anaerobic digestion of municipal sewage sludge." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/2056.

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This research focuses on investigating effects of combined microwave-ultrasonic pretreatment of municipal sewage sludge on anaerobic digester performance. Application of a novel combined microwave-ultrasonic pretreatment on thickened excess activated and mixed sludge significantly improved methane production, volatile solid and COD reduction, digestion kinetics, pathogen removal and dewaterability. Effects of Organic loading rate, sludge retention time and sludge mixing ratio were studied. Microwave and ultrasonic pretreatment conditions and digester operational parameters were optimized usi
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27

Wong, Tak Ian. "Numerical flow simulations of an egg-shaped anaerobic sludge digester in wastewater treatment /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202005%20WONG.

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28

Lee, Myung-Yeol. "Effective Anaerobic Co-digestion of Kitchen Garbage and Excess Sludge Using Two-Phase Hyperthermophilic Digestion Systems." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/124495.

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29

Wable, Milind Vishnd. "Investigation of hypothesized anaerobic stabilization mechanisms in biological phosphorus removal systems /." This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042006-164504/.

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30

Kwong, Tin-sang. "Anaerobic degradation of particulate starch in different reactors under mesophilic conditions /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1478693X.

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31

CHIAPPERO, MARCO. "Application of biochar as additive in Anaerobic Digestion." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2972102.

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32

Budiastuti, Herawati. "Intensification of single stage continuously stirred tank anaerobic digestion process using carriers." Thesis, Budiastuti, Herawati (2004) Intensification of single stage continuously stirred tank anaerobic digestion process using carriers. PhD thesis, Murdoch University, 2004. https://researchrepository.murdoch.edu.au/id/eprint/491/.

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The Continuously fed Stirred Tank Reactor (CSTR) is a popular design for anaerobic treatment of wastewater. This reactor type is simple in design and operation, independent of biomass type and low in capital costs. The CSTR has, however, to be operated at long Hydraulic Retention Times (HRT) of the order of 16 to 30 days since biomass is continuously lost with the effluent. Various alternate concepts of reactor design have, therefore, been developed to allow more rapid treatment. Treatment can be enhanced by retaining biomass within the digester so that the HRT is decoupled from solid biomass
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33

Budiastuti, Herawati. "Intensification of single stage continuously stirred tank anaerobic digestion process using carriers." Budiastuti, Herawati (2004) Intensification of single stage continuously stirred tank anaerobic digestion process using carriers. PhD thesis, Murdoch University, 2004. http://researchrepository.murdoch.edu.au/491/.

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The Continuously fed Stirred Tank Reactor (CSTR) is a popular design for anaerobic treatment of wastewater. This reactor type is simple in design and operation, independent of biomass type and low in capital costs. The CSTR has, however, to be operated at long Hydraulic Retention Times (HRT) of the order of 16 to 30 days since biomass is continuously lost with the effluent. Various alternate concepts of reactor design have, therefore, been developed to allow more rapid treatment. Treatment can be enhanced by retaining biomass within the digester so that the HRT is decoupled from solid biomass
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34

Ferrer, i. Martí Ivet. "Study of the effect of process parameters on the thermophilic anaerobic digestion of sewage sludge, evaluation of a thermal sludge pre-treatment and overall energetic assessment." Doctoral thesis, Universitat Autònoma de Barcelona, 2008. http://hdl.handle.net/10803/5323.

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El consum energètic representa un 30 % dels costos d'operació en sistemes intensius de tractament d'aigües residuals urbanes. En depuradores convencionals que utilitzin un sistema de fangs activats, entorn al 15-20 % de l'energia és consumida en la línia dels fangs, que inclou el bombeig, l'espessiment, l'estabilització i la deshidratació. Per tant, la optimització de la gestió dels fangs pot contribuir substancialment en la reducció dels costos de tractament d'aigües residuals. La digestió anaeròbia termofílica és més eficient que la mesofílica i pscicrofílica, en termes de producció de biogà
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35

Lam, Shirley. "Effect of sulphate on the anaerobic degradation of organic pollutants (benzoate) /." Hong Kong : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13813523.

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36

Gomez, Barrantes Eddie Francisco. "Biodegradation of bio-based plastics and anaerobic digestion of cavitated municipal sewage sludge." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1385467507.

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37

Shana, Achame. "Application of an innovative process for improving mesophilic anaerobic digestion of sewage sludge." Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/809611/.

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Over the last 18 years, different sludge pre-treatment processes have been used to improve the performance of sewage sludge anaerobic digestion efficiency. Some of these pre-treatment technologies, notably the Thermal Hydrolysis Process (THP), has significantly increased the sludge throughput and allowed more efficient utilisation of treatment assets without adversely impacting the biology of the anaerobic digestion process. However, the expected increase in Volatile Solid reduction (VSr) and the consequent increase of biogas production have not been fully realised. Specifically, to address th
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38

Scheuerman, Phillip R., Samuel R. Farrah, and Gabriel Bitton. "Laboratory Studies of Virus Survival During Aerobic and Anaerobic Digestion of Sewage Sludge." Digital Commons @ East Tennessee State University, 1991. https://dc.etsu.edu/etsu-works/2870.

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The survival of three enteroviruses (polio 1, coxsackie B3 and echo 1) and a rotavirus (SA-11) was studied under laboratory conditions. The effects of temperature, dissolved oxygen, detention time, sludge source and virus type on virus inactivation were determined. Temperature was the single most important factor influencing the rate of virus inactivation. No significant differences were found for virus inactivation rates at dissolved oxygen levels between 0.9 and 5.8 mg/l. However, the inactivation rate of the viruses under aerobic conditions was found to be significantly greater than the ina
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39

林淑儀 and Shirley Lam. "Effect of sulphate on the anaerobic degradation of organicpollutants (benzoate)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31252886.

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40

Nilsson, Erik. "Anaerobic digestion trials with HTC process water." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325289.

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Hydrothermal carbonization (HTC) is a process where elevated temperature and pressure is used in order to convert biomass to hydrochar, a coal-like substance with good dewatering properties and many potential uses. HTC can be used to treat digestate from anaerobic digestion, but the process water that remains after the hydrochar has been recovered needs to be treated further in the wastewater treatment plant. In order to make HTC more competitive compared to other sludge treatments it is important to find a good use for the process water. The main objective of this master thesis was to investi
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41

Montelius, Josefine. "Förbehandling av skogsindustriellt slam för ett ökat metanutbyte vid rötning : En kombination av termisk och kemisk förbehandling." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31178.

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Vid tillverkning av massa och papper förorenas årligen 505 miljoner kubikmeter vatten som måste renas innan det släpps tillbaka till omgivningen. Vid reningen avskiljs först stora partiklar som sedan avvattnas och förbränns. Vattnet som blir kvar genomgår ytterligare en rening, varvid det bildas bioslam. Bioslammet innehåller mycket intracellulärt vatten, vilket gör det kostsamt och energikrävande att avvattna. Det är även sedan 2005 förbjudet att dumpa organiskt material, varför en mer ekonomiskt attraktiv behandling av slammet är anaerob nedbrytning. I denna nedbrytning omvandlas det organis
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42

Bowles, Evan Christopher. "Performance of Acid-Gas Anaerobic Digestion for Minimization of Siloxane and Hydrogen Sulfide Produced in Biogas for Energy Recovery." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/76828.

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Organosilicon compounds, which are heavily utilized in personal care products, are typically present, sometimes in high concentrations in the influent of wastewater treatment facilities. During anaerobic sludge digestion, these compounds volatilize and enter the methane gas recovery stream. As the methane is combusted for energy cogeneration, these compounds become oxidized to microcrystalline silicon dioxide and cause damage and potential failure of expensive infrastructure. Adsorption and other catchment methods are typically utilized for removal of these volatilized compounds in order to mi
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43

Holloway, Ryan W. "Forward osmosis for concentration of anaerobic digester centrate." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1436020.

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44

Chen, Tong. "Anaerobic treatment of benzoate- and phenol- containing wastewaters /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17590607.

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45

Ozkan, Yucel Umay G. "Co-treatment Of Hazardous Compounds In Anaerobic Sewage Sludge Digesters." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609952/index.pdf.

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Xenobiotic compounds, which are exclusively man made, are produced in large quantities every year and released to the environment. Besides, anaerobic sludge digestion offers advantage in co-treatment of hazardous substances produced by the industry. The performance of the digesters can be monitored by modeling efforts. In this study, Anaerobic Digestion Model No.1 (ADM1) was calibrated, and validated for full-scale digester, lab-scale digester, and lab-scale digester seeded with totally different anaerobic biomass than that of full-scale digester. The model xenobiotic compound, a mono azo dye
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46

Tshivhunge, Azwiedziswi Sylvia. "Enzymology of activated sewage sludge during anaerobic treatment of wastewaters : identification, characterisation, isolation and partial purification of proteases." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1004072.

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During anaerobic digestion bacteria inside the digester require a carbon source for their growth and metabolism, sewage sludge was used as a carbon source in this study. The COD content was used to measure the disappearance of the substrate. COD content was reduced by 48.3% and 49% in the methanogenic and sulphidogenic bioreactors, respectively, while sulphate concentration was reduced by 40%, producing 70mg/L of hydrogen sulphide as the end product over the first 5-7 days. Sulphate (which is used as a terminal electron acceptor of sulphur reducing bacteria) has little or no effect on the sulp
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47

Park, Chul. "Cations and activated sludge floc structure." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34253.

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This research was designed to investigate the effect of cations on activated sludge characteristics and also to determine their influence on digestion performance. For this purpose, cations in solution and in floc were evaluated along with various activated sludge characteristics and the collected waste activated sludge underwent both anaerobic and aerobic digestion. It was found that large amounts of biopolymer (protein + polysaccharide) remained in the effluent of WWTP that received high influent sodium but had low iron and aluminum in floc. However, sludges from plants with high sodium and
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48

Vaidya, Ramola Vinay. "Effect of Addition of High Strength Food Wastes on Anaerobic Digestion of Sewage Sludge." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52936.

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Anaerobic co-digestion of municipal sludge and food wastes high in chemical oxygen demand (COD) has been an area of interest for waste water treatment facilities looking to increase methane production, and at the same time, dispose of the wastes and increase the revenue. However, addition of food wastes containing fats, oils and grease (FOG) to the conventional anaerobic digestion process can be difficult and pose challenges to utilities. Incorporating these wastes into the treatment plants can potentially inhibit the digestion process. In this study four lab-scale, anaerobic digesters were op
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49

DE, FRANCHI GIOVANNI. "EFFECT OF ACID AND BASE PRETREATMENT ON THE ANAEROBIC DIGESTION OF EXCESS MUNICIPAL SLUDGE." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1123706457.

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50

Soares, Ana Cristina Fermino 1964. "Occurrence of enteroviruses and Giardia cysts in sewage sludge before and after anaerobic digestion." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/278627.

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The disposal of anaerobically digested sewage sludge onto farmland in Pima county has created the need to evaluate the potential public health impact of pathogens which are indigenous to sewage and may be present in sludge. The occurrence of enteroviruses and Giardia cysts in sewage sludge before and after anaerobic digestion was monitored for a period of 14 months. This study showed that significant concentrations of enteroviruses and Giardia cysts are present in anaerobically digested sewage sludge being applied to farmland in Pima County. The concentration of Giardia cysts ranged from 1.33
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