NDLI: Sludge minimisation technologies

Content Provider	Springer Nature Link
Author	Pérez Elvira, S. I. Nieto Diez, P. Fdz Polanco, F.
Copyright Year	2006
Abstract	The treatment and disposal of excess sludge represents a bottleneck of wastewater treatment plants all over the world, due to environmental, economic, social and legal factors. There is therefore a growing interest in developing technologies to reduce the wastewater sludge generation. The goal of this paper is to present the state-of-the-art of current minimisation techniques for reducing sludge production in biological wastewater treatment processes. An overview of the main technologies is given considering three different strategies: The first option is to reduce the production of sludge by introducing in the wastewater treatment stage additional stages with a lower cellular yield coefficient compared to the one corresponding to the activated sludge process (lysis-cryptic growth, uncoupling and maintenance metabolism, predation on bacteria, anaerobic treatment). The second choice is to act on the sludge stage. As anaerobic digestion is the main process in sewage sludge treatment for reducing and stabilising the organic solids, two possibilities can be considered: introducing a pre-treatment process before the anaerobic reaction (physical, chemical or biological pre-treatments), or modifying the digestion configuration (two-stage and temperature-phased anaerobic digestion, anoxic gas flotation). And, finally, the last minimisation strategy is the removal of the sludge generated in the activated sludge plant (incineration, gasification, pyrolysis, wet air oxidation, supercritical water oxidation).
Starting Page	375
Ending Page	398
Page Count	24
File Format	PDF
ISSN	15691705
Journal	Reviews in Environmental Science and Biotechnology
Volume Number	5
Issue Number	4
e-ISSN	15729826
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-07-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	activated sludge process anaerobic digestion excess sludge production sludge minimisation wastewater treatment Atmospheric Protection/Air Quality Control/Air Pollution Microbiology Environmental Biotechnology
Content Type	Text
Resource Type	Article
Subject	Waste Management and Disposal Pollution Environmental Engineering Applied Microbiology and Biotechnology

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Removal of natural and xeno-estrogens during conventional wastewater treatment

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