Journal ArticleDOI
Effect of acid speciation on solid waste liquefaction in an anaerobic acid digester.
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TLDR
For efficient operation of two-phase anaerobic digestion, both VFAs concentration and pH should be controlled, and it was found that at low pH, undissociated acids are inhibitory.About:
This article is published in Water Research.The article was published on 2004-05-01. It has received 95 citations till now. The article focuses on the topics: Acidogenesis & Anaerobic digestion.read more
Citations
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Journal ArticleDOI
Review of the integrated process for the production of grass biomethane.
TL;DR: Production of grass biomethane is an integrated process which involves numerous stages with numerous permutations, and good digester design is to seek to emulate the cow, thus rumen fluid offers great potential for hydrolysis.
Journal ArticleDOI
The Influence of pH on Hydrolysis and Acidogenesis of Kitchen Wastes in Two-phase Anaerobic Digestion
TL;DR: A novel method of pH adjustment applying NH4 +-N buffer was established and indicated that adjusting pH to 7 in the acidogenic stage in the two-phase anaerobic digestion process would increase both TS loading rate and recovery of biological energy.
Journal ArticleDOI
Odor compounds from different sources of landfill: Characterization and source identification
TL;DR: This study investigated the odor compounds from different areas in a landfill site, which included the municipal solid waste (MSW)-related area, the leachate-related area and the sludge- related area, which showed that the main odorous substances emitted from landfill site were styrene, toluene, xylene, acetone, methanol, n-butanone, n -butylaldehyde and acetic acid.
Journal ArticleDOI
Anaerobic digestion of grass silage in batch leach bed processes for methane production
TL;DR: Anaerobic digestion of grass silage in batch leach bed reactors, with and without a second stage upflow anaerobic sludge blanket (UASB) reactor, was evaluated and sixty six percent of the methane potential in grass was obtained within the 55 days solids retention time in theLeach bed-U ASB process without pH adjustment.
Journal ArticleDOI
Two-stage anaerobic digestion of energy crops: methane production, nitrogen mineralisation and heavy metal mobilisation.
Anni Lehtomäki,Lovisa Björnsson +1 more
TL;DR: Efficient mobilisation of heavy metals during the acidic phase of digestion revealed the possibility of removing metals from leachate generated in two-stage anaerobic digestion of phytoextracting crops.
References
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Book
Standard methods for the examination of water and wastewater
TL;DR: The most widely read reference in the water industry, Water Industry Reference as discussed by the authors, is a comprehensive reference tool for water analysis methods that covers all aspects of USEPA-approved water analysis.
Book
Theory and practice of water and wastewater treatment
TL;DR: The Thermodynamic Basis for Equilibrium (TBE) is the basis for equilibrium in water and wastewater treatment as discussed by the authors, which is used for water quality and water quality standards.
Journal ArticleDOI
Volatile fatty acids as indicators of process imbalance in anaerobic digestors
TL;DR: In this paper, the use of volatile fatty acids (VFA) as process indicators was investigated in continuously stirred tank reactor experiments, with manure as substrate at thermophilic temperatures, and the VFA were evaluated according to their relative changes caused by changes in hydraulic loading, organic loading or temperature.
Patent
Two phase anaerobic digestion
Sambhunath Ghosh,Donald L. Klass +1 more
TL;DR: An improved two phase anaerobic digestion process in which an initial phase continually receives an organic feed for short detention times of less than two days under conditions which efficiently liquefy and breakdown the feed to lower molecular weight acids and other intermediates for conversion to methane is described in this paper.
Journal ArticleDOI
Uncoupling by Acetic Acid Limits Growth of and Acetogenesis by Clostridium thermoaceticum.
TL;DR: It seems unlikely that mutations at one or a few loci would result in C. thermoaceticum cells significantly more acetic acid tolerant than their parental type, as these cells require an internal pH of at least 5.5 to 5.7.