Abstract:

Tow-stage anaerobic process is adopted to treat wastewater con taining high sulphate and ammonia. The results show the CODCr and TP removal rat es are over 95% and 55%. In the first reactor, when the influent CODCr, sulpha te and ammonia are about 11 000, 2 800 and 1 000 mg/L, respectively, the rem oval rates of sulphate and CODCr are over 96% and 87%, respectively. In the ana erobic biotreatment process, there are complex interactions between H2S, VFA, CO2 and free ammonia, which helps the anaerobic biotreatment. The pH of influen t is 7.7 - 7.8 and that of the effluent is above 8.0 in the second UASB, and th e removal rate of CODCr is 65% - 75%. The SEM photographs show that the main mic robes in the two reactors are different.

Key words: upflow anaerobic sludge bed, anaerobic biotreatment, sulphate, granular sludge

摘要：

将两段UASB反应器用于处理含高浓度硫酸盐、氨氮的有机废水,结果表明COD_Cr的去除率>95%,总磷的去除率>55%。第1段反应器进水的COD_Cr、硫酸盐、氨氮分别在11000、2800、1000mg/L时,硫酸盐、COD_Cr去除率分别为>96%、>87%；厌氧生物处理过程中,废水中的游离NH3与产生的H₂S、VFA、CO₂相互作用,有利于厌氧生物处理的顺利进行。第2段反应器进水pH7.7～7.8,出水pH>8.0,COD_Cr去除率为65%～75%。扫描电镜照片显示,两段反应器中占优势的微生物种群不同。

关键词: 上流式厌氧污泥床, 厌氧生物处理, 硫酸盐, 颗粒污泥

CLC Number: 

• X703.1