Performance of membrane-coupled organic acid fermentor for the resources recovery form municipal sewage sludge.
This study focused on the treatment performance of membrane-coupled organic acid fermentor (MOF) with intermittent reciprocal air/ozone backwashing for the keeping of high permeation flux as well as for the effective recovery of dissolved organics from municipal sewage sludge. Intermittent reciprocal air/ozone backwashing was effective for membrane fouling reduction. When MOF was operated under the conditions of pH 5.5, hydraulic retention time (HRT) of 2 days and 20 days of solids retention time (SRT), most favourable fermentation efficiency was attained. Great inhibition for acid producing by intermittent reciprocal air/ozone backwashing was not observed during long-term operation. MOF with intermittent reciprocal air/ozone backwashing is believed to be an effective system for the recovery of organic matter from municipal sewage sludge and membrane fouling reduction.
Kim
Jong-Oh
JO
Department of Civil Engineering, Kangnung National University, Gangneung-daehangno 120, Gangneung, Gangwon-do, 210-702, Korea. jokim@kangnung.ac.kr
Jung
Jong-Tae
JT
D001421:Bacteria, Anaerobic / Q000378:metabolism*; D005285:Fermentation; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000032:analysis / Q000378:metabolism*; D010126:Ozone / Q000737:chemistry*; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis
D008567:Membranes, Artificial; D009930:Organic Chemicals; D012722:Sewage; D014874:Water Pollutants, Chemical; D010126:Ozone