Minimization of excess sludge production for biological wastewater treatment.
By Yuansong Wei, Renze T van Houten, A. Borger, D. Eikelboom, Yao-bo Fan. Water Research, 2003
728 citations recorded by the source corpus.
Excess sludge treatment and disposal currently represents a rising challenge for wastewater treatment plants (WWTPs) due to economic, environmental and regulation factors. There is therefore considerable impetus to explore and develop strategies and technologies for reducing excess sludge production in biological wastewater treatment processes. This paper reviews current strategies for reducing sludge production based on these mechanisms: lysis-cryptic growth, uncoupling metabolism, maintenance metabolism, and predation on bacteria. The strategies for sludge reduction should be evaluated and chosen for practical application using costs analysis and assessment of environmental impact. High costs still limit technologies of sludge ozonation-cryptic growth and membrane bioreactor from spreading application in full-scale WWTPs. Bioacclimation and harmful to environment are major bottlenecks for chemical uncoupler in practical application. Sludge reduction induced by oligochaetes may present a cost-effective way for WWTPs if unstable worm growth is solved. Employing any strategy for reducing sludge production may have an impact on microbial community in biological wastewater treatment processes. This impact may influence the sludge characteristics and the quality of effluent.
Subfields: Industrial and Manufacturing Engineering, Pollution
View Paper: https://www.semanticscholar.org/paper/e29120d1d06c08f6c587a191914dde63b1cb6b5e
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Citations in the corpus
- Microbiological Endogenous Processes in Biological Wastewater Treatment Systems (2010, methodology): “Although the uncoupling of heterotrophic bacteria would hardly occur automatically in the municipal BWTSs where carbon sources (ie, energy sources of heterotrophic bacteria) are usually limited, we can put uncoupler into the wastewater to minimize the waste sludge by taking advantage of uncoupling ”
- Succession of bacterial community and enzymatic activities of activated sludge by heat-treatment for reduction of excess sludge (2008, background): “The reduction of excess sludge by heat-treatment is induced y sludge lysis and further cryptic growth (lysis-cryptic rowth) [2].”