Download or read book Anaerobic Co digestion of Municipal Sludge and Restaurant Grease written by Zengkai Liu and published by LAP Lambert Academic Publishing. This book was released on 2014-04-30 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anaerobic codigestion of municipal wastewater sludge and restaurant grease was investigated in a semi-continuous lab-scale digestion experiment under mesophilic condition (37 C). Compared to the control digester, COD loading rate for test digester was elevated to 387% (organic loading rate 4.235 kgVS/m3/d) and led to 467% increase in daily biogas production, 25.2% increase in methane yield (based on VS deduction), 29.8% increase in COD reduction rate and 27.2% increase in VS reduction rate, respectively. Methane content ranged from 62% to 67%. There was no negative effect of grease addition on the digester performance in this experiment. The great increases in biogas production and methane yield indicated enhanced digestion performance. In addition, partial alkalinity and pH proved to be good indicators to monitor digestion process and predict overloading. It is still possible to keep increasing organic loading by the addition of more grease, but according to monitoring results, the system was close to overloading.

Download or read book Anaerobic Codigestion of Municipal Wastewater Sludge and Restaurant Grease written by Zengkai Liu and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mesophilic Anaerobic Co digestion of Municipal Wastewater Sludge and Un dewatered Grease Trap Waste written by Sedat Yalcinkaya and published by . This book was released on 2014 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fat, oil, and grease residues, food particles, solids and some kitchen wastewaters are collected in grease traps which are separate from the municipal wastewater stream. Grease traps are emptied periodically and grease trap waste (GTW) is hauled for treatment. This dissertation focuses on anaerobic co-digestion of un-dewatered (raw) GTW with municipal wastewater treatment sludge (MWS) at wastewater treatment plants. In particular, this research focuses on the biochemical methane potential of un-dewatered GTW as well as the stability and performance of anaerobic co-digestion of MWS and un-dewatered GTW. A set of modified biochemical methane potential tests was performed to determine the methane potential of un-dewatered GTW under mesophilic conditions (35 °C). Methane potential of un-dewatered GTW in this study was 606 mL CH4/g VS [subscript added] which is less than previously reported methane potentials of 845 - 1050 mL CH4/g VS [subscript added] for concentrated/dewatered GTW. However, the methane potential of un-dewatered GTW (606 mL CH4/g VS [subscript added]) was more than two times greater than the 223 mL CH4/g VS [subscript added] reported for MWS digestion alone. A comprehensive study was performed to determine the stability and performance of anaerobic co-digestion of MWS with un-dewatered GTW as a function of increasing GTW feed ratios. The performance of two semi-continuously fed anaerobic digesters at 35 °C was evaluated as a function of increasing GTW feed ratios. Anaerobic co-digestion of MWS with un-dewatered GTW at a 46% GTW feed ratio (on a volatile solids basis) resulted in a 67% increase in methane production and a 26% increase in volatile solids reduction compared to anaerobic digestion of MWS alone. On the other hand, anaerobic co-digestion of un-dewatered GTW resulted in a higher inhibition threshold (46% on VS basis) than that of dewatered GTW. These results indicate that using un-dewatered GTW instead of dewatered GTW can reduce the inhibition risk of anaerobic co-digestion of MWS and GTW. Recovery of the anaerobic digesters following upset conditions was also evaluated and semi-continuous feed of digester effluent into upset digesters yielded of the biogas production level of the undisrupted digestion. Finally, a mathematical model was used to describe the relationship between methane potential and GTW feed ratio on a VS basis. The results of this research can be used to predict methane production and identify suitable GTW feeding ratios for successful co-digestion of un-dewatered GTW and MWS.

Download or read book Anaerobic Co digestion of Municipal Sewage Sludge with Selected Commercial and Industrial Organic Wastes written by Vahid Razaviarani and published by . This book was released on 2014 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall goal of this research was to investigate the anaerobic co-digestion of municipal sewage sludge with selected organic wastes in three main areas: (1) to determine the maximum feasible loading of co-substrate, (2) to calibrate the ADM1 model for co-digestion system at steady state, and (3) to evaluate the linkage between microbial community dynamics and reactor performance and stability during steady state and overloading co-digestion. In this study, restaurant grease waste (GTW) as a commercial waste and biodiesel glycerin waste (BGW) as an industrial waste were co-digested with municipal wastewater sludge (MWS) in separate trials. In the first part of this research, the maximum feasible loading of each of the organic wastes with MWS with respect to the reactor performance and stability were investigated in the separate pilot-scale experiments. In each run, two 1300L completely mixed reactors were operated under mesophilic temperature (37°C) and a solids retention time (SRT) of 20 days. Throughout the pilot experiment, one reactor served as control and received only MWS and the other was assigned as the test digester and fed with the mixture of MWS and the co-substrate (GTW or BGW) in various organic loadings. GTW co-digestion with MWS was found to be feasible up to a maximum loading of 23% VS or 58% COD relative to the total 1.6 kg VS/m3-d or 4.0 kg COD/m3-d loadings, respectively. At this loading, test digester biogas production was 67% greater than that of the control. The test digester biogas production declined markedly when the percentage of VS from GTW in its feed was increased to 30% of its total VS loading. Causes of the reduced biogas production were investigated and attributed to process inhibition due to long chain fatty acid accumulation. The maximum safe limit of BGW co-digested with MWS was found at 23% and 35% of the total 1.04 kg VS/ (m3-d) and 2.38 kg COD/ (m3-d) loadings, respectively. At this loading, the biogas and methane production rates in the test digester were 1.65 and 1.83 times greater than of those in the control digester which received only MWS, respectively. Process instability was observed when the proportion of BGW in the test digester feed was 31% and 46% of the 1.18 kg VS/ (m3-d) and 2.88 kg COD/ (m3-d) loadings, respectively. In the second part of the research, the ADM1 model was calibrated for co-digestion of MWS and GTW at steady state using anaerobic respirometric test with substrate characterizations. Initial biomass concentrations and distributions were estimated using methane production rate curves together with effluent values from full-scale anaerobic digesters. Two separate datasets obtained from steady state mesophilic bench-scale experiments were used to calibrate and validate the model. The modified model was able to predict reasonably well the steady-state results of biogas production, CH4 and CO2 contents, pH, alkalinity, COD and VSS observed within the evaluated GTW loading. The calibrated model predicted well the bench and pilot scale co-digesters performance. The last part of the study was to investigate the relationships between microbial population (bacteria and archaea) dynamics and reactor performance and stability during the co-digestion of MWS with GTW or BGW in two separate trails. Pyrosequencing analysis revealed that Methanosaeta and Methanomicrobium were the dominant acetoclastic and hydrogenotrophic methanogen genera, respectively, during stable reactor operation. The roles of syntrophic bacteria such as Candidatus Cloacamonas-- and hydrogenotrophic methanogens were found to be substantial at overloading conditions in both experiments.

Download or read book Environmental Economic and Process Evaluation of Anaerobic Co digestion of Grease Trap Waste with Municipal Wastewater Sludge written by James Hunter Long and published by . This book was released on 2012 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Industrial and Municipal Sludge written by Majeti Narasimha Vara Prasad and published by Butterworth-Heinemann. This book was released on 2019-04-16 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial and Municipal Sludge: Emerging Concerns and Scope for Resource Recovery begins with a characterization of the types of sludge and their sources and management strategies. This section is followed by specific chapters that cover Emerging contaminants in sludge (Endocrine disruptors, Pesticides and Pharmaceutical residues, including illicit drugs/controlled substances), Bioleaching of sludge [with an enriched sulfur-oxidizing bacterial community, Recovery of valuable metals (Bioleaching and use of sulfur-oxidizing bacterial community, and Biogas production by continuous thermal hydrolysis and thermophilic anaerobic digestion of waste activated sludge. In addition, the book includes numerous tables and flow diagrams to help users further comprehend the subject matter. - Includes numerous tables and flow diagrams to assist in the comprehension of new and existing sludge treatments and resource recovery technology - Covers biogas production by continuous thermal hydrolysis and thermophilic anaerobic digestion of waste activated sludge - Presents information on the recovery of valuable metals from sludge (bioleaching and the use of a sulfur-oxidizing bacterial community) - Includes opportunities and challenges in the biorefinery-based valorization of pulp and paper sludge

Download or read book Optimization and Applicability of Bioprocesses written by Hemant J. Purohit and published by Springer. This book was released on 2018-01-02 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book argues that the sustainable management of resources requires a systematic approach that primarily involves the integration of green innovative biotechnological strategies and eco-engineering. It discusses how microbial community intelligence can be used for waste management and bio-remediation and explains how biological processes can be optimized by integrating genomics tools to provide perspectives on sustainable development. The book describes the application of modern molecular techniques such as fluorescence in situ hybridization (FISH), highly sensitive catalyzed reporter deposition (CARD)-FISH, in situ DNA-hybridization chain reaction (HCR) and methods for detecting mRNA and/or functional genes to optimize bioprocessess. These techniques, supplemented with metagenomic analysis, reveal that a large proportion of micro-organisms still remain to be identified and also that they play a vital role in establishing bioprocesses.

Download or read book Bio Based Materials and Waste for Energy Generation and Resource Management written by Ram Naresh Bharagava and published by Elsevier. This book was released on 2023-05-08 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bio-Based Materials and Wastes for Energy Generation and Resource Management is the fifth and final volume in the series, Advanced Zero Waste Tools: Present and Emerging Waste Management Practices. It addresses processes and practices for utilizing bio-based materials and wastes to support efforts to promote a more sustainable society and provide readers with a better understanding of the major mechanisms required to achieve zero waste in different fields. This book covers numerous mechanisms supported by scientific evidence and case studies, as well as in-depth flowcharts and process diagrams to allow for readers to adopt these processes. Summarizing present and emerging zero waste tools on the scale of both experimental and theoretical models, Advanced Zero Waste Tools is the first step toward understanding the state-of-the-art practices in making the zero waste goal a reality. In addition to environmental and engineering principles, it also covers economic, toxicologic, and regulatory issues, making it an important resource for researchers, engineers, and policymakers working toward environmental sustainability. - Uses fundamental, interdisciplinary, and state-of-the-art coverage of zero waste research to provide an integrated approach to tools, methodology, and indicators for bio-based resource management - Presents strategies for treatment of biological waste to contribute to sustainable management and development - Includes numerous case studies to illustrate the management of biowaste for generation of economy and energy

Download or read book Microbial Fuels written by Farshad Darvishi Harzevili and published by CRC Press. This book was released on 2017-09-18 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book will highlight major trends and developments in the field of microbial fuels, with contributions from a number of highly experienced researchers. It will serve as a comprehensive reference for industrial stakeholders, scientists, researchers and graduate students interested in microbial fuels. The aims of this work are to present the technologies and perspectives taking into account different socio-economical contexts. A specific chapter will focus on the general perspectives of microbial fuels for low-income and emerging countries.

Download or read book Anaerobic Co digestion of Organic Food Wastes Fat Oil and Grease with Wastewater Sludge to Optimise Energy Production and Biogas Purification written by Olumide Wesley Awe and published by . This book was released on 2017 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods for Enhancing Biogas Production written by Agnieszka Montusiewicz and published by Taylor & Francis. This book was released on 2024-12-02 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concern about using organic waste as a renewable energy source is a critical worldwide issue. In this area, anaerobic digestion (AD) seems to be a promising solution because of the significant reduction of waste quantity and generation of valuable products such as biogas, regarded as being a good energy carrier and digestate with high nutritional potential for agriculture. The current trends in AD focus on improving the efficiency of the process to make this a cost-effective treatment. Depending on the source (agricultural, municipal, or industrial), organic waste varies considering both its composition and structure, and thus the bioaccessibility and biodegradability. Accordingly, materials rich in carbohydrates, proteins, and fats require different operational conditions to overcome technological problems and minimize the risk of disruption or failure of the anaerobic systems. Different strategies can be used to enhance biogas production, including waste pretreatment (physical, chemical, physico-chemical, biological, and combined), two-stage AD (temperaturephased AD and two-phase AD), anaerobic co-digestion (two-substrate and multi-substrate systems), and bioaugmentation (with natural strains or specialized consortia of microorganisms and genetically modified microorganisms or their consortia). Some of them enhance its accessibility and digestibility, while others improve nutritional balance, metabolic properties, and operational factors, facilitating synergistic effect of microorganisms. This book covers the current developments in the area of enhancing biogas production.

Download or read book Waste to Energy Approaches Towards Zero Waste written by Sunpreet Singh and published by Elsevier. This book was released on 2021-11-09 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waste-to-Energy Approaches Towards Zero Waste: Interdisciplinary Methods of Controlling Waste provides a comprehensive overview of the key technologies and approaches to achieve zero waste from energy. The book emphasizes the importance of an integrated approach to waste-to-energy using fundamental concepts and principles, and presents key methods, their applications, and perspectives on future development. The book provides readers with the tools to make key decisions on waste-to-energy projects from zero-waste principles, while incorporating sustainability and life cycle assessments from financial and environmental perspectives. Waste-to-Energy Approaches Towards Zero Waste: Interdisciplinary Methods of Controlling Waste offers practical guidance on achieving energy with zero waste ideal for researchers and graduate students involved in waste-to-energy and renewable energy, waste remediation, and sustainability. - Provides an integrated approach for waste-to-energy using zero waste concepts - Offers decision-making guidance on selecting the most appropriate approach for each project - Presents the sustainability and life cycle assessment of WTE technologies on financial and environmental grounds

Download or read book Encyclopedia of Food Security and Sustainability written by and published by Elsevier. This book was released on 2018-11-08 with total page 1861 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Food Security and Sustainability, Three Volume Set covers the hottest topics in the science of food sustainability, providing a synopsis of the path society is on to secure food for a growing population. It investigates the focal issue of sustainable food production in relation to the effects of global change on food resources, biodiversity and global food security. This collection of methodological approaches and knowledge derived from expert authors around the world offers the research community, food industry, scientists and students with the knowledge to relate to, and report on, the novel challenges of food production and sustainability. This comprehensive encyclopedia will act as a platform to show how an interdisciplinary approach and closer collaboration between the scientific and industrial communities is necessary to strengthen our existing capacity to generate and share research data. Offers readers a ‘one-stop’ resource on the topic of food security and sustainability Contains articles split into sections based on the various dimensions of Food Security and Food Sustainability Written by academics and practitioners from various fields and regions with a “farm to fork understanding Includes concise and accessible chapters, providing an authoritative introduction for non-specialists and readers from undergraduate level upwards, as well as up-to-date foundational content for those familiar with the field

Download or read book Current Developments in Biotechnology and Bioengineering written by Duu-Jong Lee and published by Elsevier. This book was released on 2016-09-19 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Developments in Biotechnology and Bioengineering: Biological Treatment of Industrial Effluents provides extensive coverage of new developments, state-of-the-art technologies, and potential future trends in data-based scientific knowledge and advanced information on the role and application of environmental biotechnology and engineering in the treatment of industrial effluents. These treatment processes have been broadly classified under aerobic and anaerobic processes which determines the scope and level of pollutant removal. Chapters in this volume review the most recent developments and perspectives at different environmental cleanup operation scales. - Outlines available biochemical processes for the treatment of solid industrial waste - Covers aerobic and anaerobic treatments, their mechanisms, and selection criteria - Highlights specific industrial applications, such as anammox processes

Download or read book Wastewater Sludge Processing written by Izrail S. Turovskiy and published by John Wiley & Sons. This book was released on 2006-08-08 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reap the benefits of sludge The processing of wastewater sludge for use or disposal has been a continuing challenge for municipal agencies. Yet, whensludge is properly processed, the resulting nutrient-rich product--biosolids--can be a valuable resource for agriculture and other uses. Wastewater Sludge Processing brings together a wide body of knowledge from the field to examine how to effectively process sludge to reap its benefits, yet protect public health. Presented in a format useful as both a reference for practicing environmental engineers and a textbook for graduatestudents, this book discusses unit operations used for processing sludge and the available methods for final disposition of the processed product. Topics discussed include sludge quantities and characteristics, thickening and dewatering, aerobicand anaerobic digestion, alkaline stabilization, composting, thermal drying and incineration, energy consumption, and the beneficial use of biosolids. COMPREHENSIVE IN ITS COVERAGE, THE TEXT: * Describes new and emerging technologies as well as international methods * Compares different types of sludge processing methods * Explains both municipal and industrial treatment technologies Written by authors with decades of experience in the field, Wastewater Sludge Processing is an invaluable tool for anyone planning, designing, and implementing municipal wastewater sludge management projects.

Download or read book Biological Wastewater Treatment written by C. P. Leslie Grady Jr. and published by CRC Press. This book was released on 2011-05-09 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following in the footsteps of previous highly successful and useful editions, Biological Wastewater Treatment, Third Edition presents the theoretical principles and design procedures for biochemical operations used in wastewater treatment processes. It reflects important changes and advancements in the field, such as a revised treatment of the micr

Download or read book Anaerobic Co digestion of Thickened Waste Activated Sludge with Grease Interceptor Waste written by Ling Wang and published by . This book was released on 2012 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: