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Showing 1 to 20 of 289 for “"Anaerobic Digestion"”.
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Anaerobic digestion of catering wastes
… associated<br/>with long term semi-continuous digestion of food waste as a sole substrate, and the role of<br/>trace elements and biomass retention in digestion of food wastes.<br/><br/>Source segregated food wastes were collected from a university catering facility and found,<br/>in …
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Developments in anaerobic digestion modelling
Anaerobic digestion (AD) is notorious for being susceptible to failure and is regarded as unstable and sensitive. Thus, to avoid failure, anaerobic digesters are frequently operated far below their optimal level. In order to run a digester closer to capacity, a better understanding of AD failure is …
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Anaerobic Digestion: Factors Effecting Odor Generation
Land application of anaerobically stabilized biosolids is a beneficial method of handling the solid residuals from a wastewater treatment plant. One of the main issues that restrict land application of biosolids is nuisance odors associated with biosolids. Despite its importance, few studies have …
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Anaerobic Digestion of Separated Cattle Slurry
… size did not significantly influence the digestion process. <br/><br/>Shock treatments were performed by lowering the temperature of digesters operated at a 1O and 25 day RT on SCS from 35oC to 3-6oC over several days, and employing different recovery strategies. Measurement of gas …
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Toward Simple Generic Control in Anaerobic Digestion
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 …
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Impact of metallic nanoparticles on anaerobic digestion
… and industrial wastewater treatment. In batch anaerobic digestion systems, AgNPs at the concentration of 40 mg/L did not inhibit methane production, as more than 90% of AgNPs were removed from the liquid to the associated sludge while almost no silver ions were released from AgNPs under …
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Optimisation of small scale anaerobic digestion technology
The recent advances in anaerobic digestion (AD) technology and changes in government policies have contributed to the gradual increase in the establishment of on-site smallscale anaerobic digesters in developed regions, particularly in Europe. However, these advances have not completely eradicated …
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Biological nutrients and growth in anaerobic digestion
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Sanitary Engineering, 1961.
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Kinetic modeling and experimentation of anaerobic digestion
Anaerobic digesters convert organic waste (agricultural and food waste, animal or human manure, and other organic waste), into energy (in the form of biogas or electricity). An added benefit to bio-digestion is a leftover high-grade organic fertilizer. Models of the anaerobic digestion process do …
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Comparative Studies of Alternative Anaerobic Digestion Technologies
… Sewage Authority is planning to construct a new anaerobic digestion facility at its Blue Plains WWTP by 2008. The research conducted in this study is to aid the designers of this facility by evaluating alternative digestion technologies. Alternative anaerobic digestion technologies include …
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Molecular biology approach to anaerobic digestion of marine biomass: Anaerobic digestion from marine materials. What makes a methanogen happy?
… the microbial community associated with seaweed anaerobic digestion in order to understand the intricate interaction between the microbial population and process functions. Selected seaweeds (Laminaria digitata, Saccharina lattissima and Fucus serratus) found commonly on the west coast of …
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Variables Affecting Gas Production in Mesophilic Anaerobic Digestion
… influence the net gas production in mesophilic anaerobic digesters. The major variables were examined during a six year period using equipment specially designed for the purpose. Continuous operation of these pilot plants over many months produced results which shoved a relationship "between gas …
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Cellulose mineralization in two-stage anaerobic digestion systems
… objective of this research was to evaluate the anaerobic degradation of a simulated high-strength solid waste/sludge, particulate cellulose, by two-stage anaerobic digestion systems. Cellulose hydrolysis and methanogesis were examined in both the thermo-meso and acid-methane two-stage systems …
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Mechanisms of Methanogenic Inhibition in Advanced Anaerobic Digestion
A series of lab-scaled digestion studies including conventional mesophilic anaerobic digestion(MAD), thermophilic anaerobic digestion (TAD) at a range of treatment temperatures, and mesophilic high solids digestion of thermally pretreated wastewater sludge (THD) were carried out. Enhanced digestion …
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Enhancing biomethane production from anaerobic digestion of Sargassum muticum
Higher methane yields from the anaerobic digestion (AD) of Sargassum muticum could improve the process energy balance and make its use during AD more economical and energetically favourable. Previous research showed that after 28 days of AD, methane yields from S. muticum were low (17% of the …
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Effect of Long-Chain Fatty Acids on Anaerobic Digestion
… long-chain fatty acids (LCFAs) have an effect on digestion of waste sludge under anaerobic conditions. Four different kinds of LCFAs were used in this study. The 18 carbon series with 0, 1, 2 and 3 double bonds were studied to evaluate the degree of saturation on fatty acid degradation. Due to …
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Improving Anaerobic Digestion of Sewage Sludge Using Free Ammonia Pretreatment
… economic burden for WWTPs for their disposals. Anaerobic digestion (AD) for sewage sludge treatment is adopted WWTPs globally for sludge reduction and energy recovery through biogas. However, the AD efficiencies for sludge reduction and biogas production are generally limited. Hydrolysis is …
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