升流式厌氧填充床反应器处理高硫酸盐废水的运行特性

Abstract

本文采用升流式填充床厌氧反应器，探究了HRT (12、14、16、20 h)和COD/SO42- (0.6、0.7、0.8、0.9、1)以及硫酸盐负荷(1.5、3、4.5、6、7.5 kg/(m3•d))对反应器长期性能的影响。当HRT从12 h延长到16 h时，进水硫酸盐去除率从(68.53±4.42)%增加到(89.90±1.89)%，并且在20h和24h时均保持在90%以上。当COD/SO42-为1时，硫酸盐去除率高达(91.59±3.53)%。当COD/SO42-比为0.6时，硫酸盐去除率仅为(62.85±5.47)%。当硫酸盐负荷为1.5、3 kg/(m3•d)时均有90%以上的良好的硫酸盐去除率，当硫酸盐负荷高于4.5kg/(m3•d)去除效果不佳。研究结果表明当HRT为16h且在COD/SO42-为0.9时，且硫酸盐负荷低于4.5kg/(m3•d)时硫酸盐还原菌(SRB)具有优异的处理高硫酸盐废水的能力。 This article uses an upflow packed bed anaerobic reactor to explore HRT (12, 14, 16, 20 h) and COD/SO42- (0.6, 0.7, 0.8, 0.9, 1) and the influence of sulfate load (1.5, 3, 4.5, 6, 7.5 kg/(m3•d)) on the long-term performance of the reactor. When HRT was extended from 12 h to 16 h, the influent sulfate removal rate increased from (68.53 ± 4.42)% to (89.90 ± 1.89)%, and remained above 90% at 20 h and 24 h. When COD/SO42- is 1, the sulfate removal rate is as high as (91.59 ± 3.53)%. When the COD/SO42- is 0.6, the sulfate removal rate is only (62.85 ± 5.47%)%. When the sulfate load is 1.5, 3 kg/(m3•d), both have a good sulfate removal rate of more than 90%. When the sulfate load is higher than 4.5 kg/(m3•d), the removal effect is not good. The research results show that when the HRT is 16 h and the COD/SO42- is 0.9, and the sulfate load is less than 4.5 kg/(m3•d), sul-fate reducing bacteria (SRB) have excellent ability to treat high sulfate wastewater.