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Grease trap waste (GTW) presents a challenge to wastewater treatment processes due to its slow biodegradation kinetics, high oxygen demand, and risks of pipeline blockage. The objective of this work was to evaluate the feasibility of GTW as an organic-rich co-substrate to improve biomethane production in the anaerobic digestion of municipal waste sludge (MWS) from sewage treatment, one of the most...
Experiments have been carried out to investigate the effect of biological factors such as organic loading, dissolved oxygen (DO) and temperature on performance of denitrification in a step-feed multi-stage biofilm reactor, for municipal wastewater treatment in small cities and towns.It was found that organic loading, DO and temperature had significant influences on performance of denitrification in...
A in situ biological uncoupling metabolism sludge yield reduction system was constructed in SBBR. To induce uncoupled metabolism, aeration mode was introduced to a bench-scale SBBR(Sequencing-Batch Biofilm Reactor) process to investigate sludge yield and sewage treatment performance. It was found that when the aeration mode was aeration 30min/30min without aeration, uncoupling metabolism in the biofilm...
Tannins occur commonly in the wastewaters from forestry, plant medicine, paper and leather industries. The treatment of this kind of wastewaters, including settling and biodegradation, is usually difficult because tannins are highly soluble in water and would inhibit the growth of microorganisms in activated sludge. The objective of this study is to investigate biodegradability of tannin-containing...
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