Toward energy-neutral wastewater treatment: a high-rate contact stabilization process to maximally recover sewage organics
The conventional activated sludge process is widely used for wastewater treatment, but to progress toward energy self-sufficiency, the wastewater treatment scheme needs to radically improve energy balances. We developed a high-rate contact stabilization (HiCS) reactor system at high sludge-specific...
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| Veröffentlicht in: | Bioresource technology 2015-03, Vol.179, p.373-381 |
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| creator | Meerburg, Francis A Boon, Nico Van Winckel, Tim Vercamer, Jensen A R Nopens, Ingmar Vlaeminck, Siegfried E |
| description | The conventional activated sludge process is widely used for wastewater treatment, but to progress toward energy self-sufficiency, the wastewater treatment scheme needs to radically improve energy balances. We developed a high-rate contact stabilization (HiCS) reactor system at high sludge-specific loading rates (>2 kg bCOD kg(-1)TSS d(-1)) and low sludge retention times ( |
| doi_str_mv | 10.1016/j.biortech.2014.12.018 |
| format | Article |
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We developed a high-rate contact stabilization (HiCS) reactor system at high sludge-specific loading rates (>2 kg bCOD kg(-1)TSS d(-1)) and low sludge retention times (<1.2 d) and demonstrate that it is able to recover more chemical energy from wastewater organics than high-rate conventional activated sludge (HiCAS) and the low-rate variants of HiCS and HiCAS. The best HiCS system recovered 36% of the influent chemical energy as methane, due to the combined effects of low production of CO2, high sludge yield, and high methane yield of the produced sludge. The HiCS system imposed a feast-famine cycle and a putative selection pressure on the sludge micro-organisms toward substrate adsorption and storage. Given further optimization, it is a promising process for energy recovery from wastewater.</description><identifier>ISSN: 0960-8524</identifier><identifier>EISSN: 1873-2976</identifier><identifier>DOI: 10.1016/j.biortech.2014.12.018</identifier><identifier>PMID: 25553568</identifier><language>eng</language><publisher>England</publisher><subject>Activated sludge ; Biological Oxygen Demand Analysis ; Carbon - analysis ; Chemical energy ; Chemical Fractionation ; Contact ; Energy use ; Kinetics ; Methane ; Methane - biosynthesis ; Organic Chemicals - isolation & purification ; Sewage - chemistry ; Sludge ; Stabilization ; Thermodynamics ; Waste water ; Waste Water - chemistry ; Wastewater treatment ; Water Purification - methods</subject><ispartof>Bioresource technology, 2015-03, Vol.179, p.373-381</ispartof><rights>Copyright © 2014 Elsevier Ltd. 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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Activated sludge Biological Oxygen Demand Analysis Carbon - analysis Chemical energy Chemical Fractionation Contact Energy use Kinetics Methane Methane - biosynthesis Organic Chemicals - isolation & purification Sewage - chemistry Sludge Stabilization Thermodynamics Waste water Waste Water - chemistry Wastewater treatment Water Purification - methods |
| title | Toward energy-neutral wastewater treatment: a high-rate contact stabilization process to maximally recover sewage organics |
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