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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"Co-digestion"”.
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Anaerobic co-digestion of municipal solid waste and sewage sludge.
… of municipal solid waste management, anaerobic digestion possesses the optimal combination of volume reduction, probability of success and potential for both energy and resource recovery. An innovative application of anaerobic processes is the co-digestion of sewage sludge and the organic …
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Anaerobic Co-digestion of Microalgae with Food Waste and Wastewater Sludge
<p>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 …
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Anaerobic Co-digestion of Wastewater Treatment Pond Algae with Wastewater Sludge
… 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 …
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Process development for co-digestion of toxic effluents : development of screening procedures
Submitted in partial fulfilment of academic requirements for the degree of Masters of Technology: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2009.
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Optimization of anaerobic co-digestion of sewage sludge using bio-chemical substrates
Submitted in fulfillment of the requirements of the degree of Masters of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2018.
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Improvement of the digestion of cattle slurry via the process of co-digestion
The use of maize (Zea mays) as a co-substrate with cattle slurry for the production of biogas was investigated in detail by running several long term digestion trials under different operational conditions in laboratory scale semi-continuous digesters. These conditions included varying the organic …
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The effect of biomass acclimation on the co-digestion of toxic organic effluents in anaerobic digesters
Dissertation submitted in fulfilment of academic requirements for the Degree of Master of Technology: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2008.
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ENHANCING BIOGAS PRODUCTION IN COLD-REGION WASTEWATER TREATMENT USING ULTRASONIC PRETREATMENT AND CO-DIGESTION WITH BREWER’S SPENT GRAIN
Anaerobic digestion (AD) is a widely used renewable energy technology that treats sludge from municipal wastewater treatment plants (MWTPs) by converting its organic matter into biogas. However, AD processes have limitations, such as slow hydrolysis rates, low biogas yields, and sensitivity to …
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Anaerobic Co-Digestion of High Strength Food Waste with Municipal Sewage Sludge: An assessment of Digester Performance and gas production
Anaerobic digestion is perhaps the simplest and most widely accepted method for solids and residuals management in the field of wastewater treatment. An emerging trend with regard to anaerobic digestion is the addition of additional organic or industrial wastes rich in degradable material (COD) …
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Using Anaerobic Co-Digestion With Addition of Municipal Organic Wastes and Pre-Treatment to Enhance Biogas Production From Wastewater Treatment Plant Sludge
In this project, by adding selected co-substrates and by incorporating optimum pre-treatment strategies, four experimental phases were conducted to assess the enhancement of biogas production from anaerobic co-digestion using wastewater treatment plant sludge as the primary substrate. In the first …
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Greenhouse gas mitigation cost of energy from biogas : a techno-economic analysis of co-digestion of three types of waste in Cape Town
This paper investigates, in the context of Cape Town the emission reduction potential (ERP) of energy from biogas and related cost. Two project-scale models and a city-scale model were developed. Substrates for project model 1 were organic fraction of municipal solid waste (OFMSW) and primary …
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Improving the anaerobic co-digestion of pelagic Sargassum and food waste into biogas and a bio-fertiliser using hydrothermal pre-treatment: Concept to application in the Caribbean
In recent years pelagic Sargassum has invaded the coastlines of the Caribbean region, Gulf of Mexico, Florida and West Africa. With intense expansion since 2011 due to environmental and oceanic anthropogenic changes, these brown seaweeds have negatively impacted aquaculture and the overall …
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Bioenergy Recovery from Bulk Greenhouse Waste and Raw Sewage Sludge
Global political climate has been leaning towards concepts of environmental consciousness, circular economy, and renewable energy. Several provincial governments in Canada have passed legislation that subjects certain municipal and industrial entities to mandates of waste diversion from landfills. …
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International biogas applications
… preferred due to their higher methane yields. Concerns about the sustainability of the use energy crops for biogas production have reduced the use of these substrates worldwide, which has encouraged the research on algae feedstock for AD. In the first part of this thesis, the biogas and …
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Avaliação da produção de hidrogênio e metano a partir da codigestão anaeróbia de resíduos
… of hydrogen and methane through anaerobic codigestion in two phases (acidogenesis and methanogenesis) of organic waste (OW), sewage sludge (SS) and raw glycerol (GL), was investigated in batch assays under temperature controlled conditions. The effect of glycerol addition (1 and 3% v/v) as …
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IMPROVING THE CIRCULARITY OF BIODEGRADABLE BIOPLASTICS BY PRODUCING BIOGAS: A FULL-SCALE ASSESSMENT
Abstract Polylactic acid (PLA) is one of the commonly used bioplastics, promoted as a sustainable alternative to conventional plastics. Their anaerobic co-digestion with the organic fractions of municipal solid waste (OFMSW) is a promising end-of-life scenario, as it reduces pre-treatment and …
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Investigating factors affecting the anaerobic digestion of seaweed: modelling and experimental approaches
… production of anaerobic systems, and thus their economic value, is one of the current research areas in the field of bioenergy production. Marine biomass represents a unique source of organic matter for the optimisation of anaerobic digestion systems and can be regarded as a sustainable …
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Pre-treatment and anaerobic codigestion of waste activated sludge from a petrochemical wastewater treatment plant
… sludge. Alternative treatment methods should be considered to minimise emissions and to derive some benefit from the WAS. One such potential method is the pre-treatment of waste activated sludge combined with co-digestion in an anaerobic digester. This study focusses on selection of a feasible …
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Thermal Hydrolysis of LCFAs and Influence of pH on Acid-phase Codigestion of FOG
… management and performance of processes for the co-digestion of biosolids with fats, oils, and grease (FOG). The mechanisms of long chain fatty acids (LCFA) degradation in thermal hydrolysis pretreatment and the influence of pH on LCFA degradation in two-phase co-digestion systems were studied. …
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Evaluation of solid food waste for biogas and manure production: a case study of the University of Venda Canteen Solid Food Waste
… food waste generated globally attracts grave concerns due to associated environmental and socio-economic implications. One way to mitigate these adverse consequences is to use the food waste as feedstock for valuable energy and fertilizer generating anaerobic digestion (AD) process. While AD …
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