Evaluation of an immersed hollow fibre membrane technology for the treatment of swine waste supernatant.

摘要

Direct filtration of diluted swine waste with an immersed hollow fibre membrane (ZeeweedRTM 500, Zenon Environmental Inc.) was tested for possible integration into a wastewater treatment system for direct non-potable or potable reuse in intensive livestock operations. A sustainable flux of 1.36 L h-1m-2kPa-1 at 20°C was determined in 20% swine waste supernatant (SWSN) which had a mean COD equivalent of 2.7 g O2/L. The compact membrane module had an effective membrane area of 0.047 m2 and 0.04 mum pore size. The membrane treatment was effective and a compete barrier to fecal coliforms and suspended solids. Turbidity was reduced to 0.5 NTU that would allow disinfectant or microbial reduction processes to work more effectively. Reduction of contaminants in percentage terms was TSS (100%), sulphide (79%), TP (49.5%), TOC (34%), COD (32%), BOD5 (29%), TDS (23%), TKN (21%), and NH3 (5.9%). A preliminary membrane size estimate of 225 m2 for a 1000 sow (6192 pig) grower finisher barn with 5:1 recycle was made.