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Treatment of Swine Wastewater By Biological and Membrane Separation Technologies

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  024096,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.10488) @2002
Authors:   R.H. Zhang, P. Yang, Z. Pan, T.D. Wolf, J.H. Turnbull
Keywords:   Swine manure, anaerobic digestion, sequencing batch reactor, membrane separation

A lab-scale integrated biological treatment and membrane separation system was studied for treatment of swine wastewater to achieve energy recovery, fertilizer production, and water reclamation. The system consisted of one Anaerobic sequencing batch reactor (ASBR), two aerobic sequencing batch reactors (SBR1 and SBR2), one sludge settling tank, one sand filter and one reverse osmosis (RO) membrane separation unit. The system was tested with swine manure of 1.5% VS. After treatment with the ASBR and SBRs, COD, TS, VS, SS and VSS in the liquid effluent were reduced by 91.7%, 88.6%, 93.0%, 96.4%, and 97.1%, respectively, and there was close to 3-log reduction in total coliforms and E coli. The ammonia in the liquid was partially oxidized into nitrite and nitrate. The sand filter further reduced COD and suspended solids in the liquid prior to RO treatment. Two types of spiral wound RO membranes were tested and compared. The membrane separation results showed that when the volume of concentrate reached 50% and 10% of original feed volume, the concentrate contained about 90% and 70% of original total nitrogen, respectively, in the liquid effluent that passed through the sand filter. The reclamed water had very good quality.

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