Quaternary ammonium compounds (QACs) are disinfection agents used in industrial cleaning processes that known to interfere with the proper functioning of anaerobic waste digestion directly impacting quality and quantity biogas produced (i.e., CO2 CH4). While impact these contaminants on digestors well known, have metabolic profile an digestor is less understood. This paper describes use nuclear...

Abstract Anaerobic mesophilic batch digestion of lime-pretreated rice straw/chicken manure/ rumen fiber mix was investigated to determine their feasibility as a feedstock produce volatile fatty acids (VFAs). The influence solid content (10, 15 & 20%) on the bioreactor performance studied in system. increase gave slight VFAs concentration but higher productivity 12.1 gL −1 d . Response surfa...

Abstract A single-stage anaerobic fluidized membrane bioreactor (AnFMBR) was applied to investigate the effects of temperature changes on fouling while treating real municipal wastewater. The AnFMBR operated at four phases: 25 °C for 42 days, 20 15 and 10 days. systems achieved a total chemical oxygen demand (TCOD) removal efficiency above 90% all phases. As decreased, accumulation solids possi...

Industrial tempeh wastewater contains high organic compounds that will negatively affect the water ecosystem's quality whenever discharged without proper treatments. Biological treatment, in particular, anaerobic digestion, is potential to be an effective solution for eliminating contaminant. Considering its advantages, especially produce methane gas, a study evaluate ...

For many years, analysis of short chain fatty acids (volatile fatty acids, VFAs) has been routinely used in identification of anaerobic bacteria. In numerous scientific papers, the fatty acids between 9 and 20 carbons in length have also been used to characterize genera and species of bacteria, especially nonfermentative Gram negative organisms. With the advent of fused silica capillary columns...

Livestock production contributes to releasing methane into the atmosphere. Liquid manure management offers significant opportunities reduce these emissions. A better understanding of factors controlling emissions from is necessary select effective mitigation strategies. Our study aimed identify influence storage temperature and associated change in chemical composition on dairy fattening pig ma...

Volatile fatty acids (VFAs) accumulation is a common problem in anaerobic digestion, which constraining the process. In this study, bioaugmentation was initially adopted as measure to tackle acidification continuous digester. However, after stopped, promotive effect of hard sustain. comparison, combination and Activated charcoal (AC) enabled better reactor performance. The positive impact AC on...

The pH and substrate-to-inoculum ratio (S/I) are important parameters in the anaerobic fermentation of agroindustrial residues, therefore optimization these two is needed for a stable, efficient, sustainable reactor operation. In this work, (5–9) S/I (0.5–3 gVS gVS−1) were optimized to produce biobased volatile fatty acids (VFAs) from hydrothermally pretreated olive mill solid waste (HPOMSW). r...

Abstract Water system closure in recycled containerboard mills may have reached a technical limit due to the accumulation of organic and inorganic contaminants process water. The specific water chemistry characteristics with restricted systems were analyzed computer model was developed simulate calcium carbonate solubility presence volatile fatty acids under relevant mill conditions. A strong l...

The effect of reducing particle size on physical properties, the methane yield and energy flow were investigated through biochemical potential (BMP) experiment aerobic-anaerobic digestion (AAD) rice straw (RS). whole was crushed four sieves different aperture sizes (1, 3, 5, 7 mm) to obtain actual non-uniform distribution (PSD). results indicated that normally or logarithmic distributed. Reduci...