STUDY ON OPPOSITE FOLDED PLATE HYBRID ANAEROBIC REACTOR (OFPHAR) IN TREATMENT OF SEWAGE

Based on the theories of mass-transfer and two-double integrated staged multi-phase anaerobe (TSMPA),an opposite folded plate hybrid anaerobic reactor (OFPHAR) was designed to treat low strength sewage. All the trial lasted 12 months and the results indicated that the optimal HRT was 6h. At this HRT,the COD,TP and TN removal rate were 76.95%,36.56%,39.28% respectively. The optimal anaerobic section rate was 45%～65%. The COD,TP and TN removal rate decreased from 79.34%,37.16%,39.89% to 63.53%,20.28%,22.35%,and the specific mathane production capacity decreased from 2.56 mL·gVSS-1·h-1 to 1.92 mL·gVSS-1·h-1 when the temperature decreased from 27℃ to 7℃ at a HRT of 6h. The results of trial indicated that it is feasible to apply this OFPHAR to treat low concentration sewage at low temperature in north China. Based on the results of trial,the mechanism of high efficacy OFPHAR in treatment of low strength sewage were owed to high efficient mass-transfer and TSMPA.