厌氧折流板反应器处理难降解PVA废水

Anaerobic baffled reactor (ABR) treatment of hardly degraded PVA wastewater

对厌氧折流板反应器(ABR)处理难降解聚乙烯醇(PVA)有机废水进行了试验研究.结果表明,ABR反应器污泥经过30d的驯化培养后,微生物对PVA具有一定的适应性,在连续运行阶段各隔室PVA、COD浓度呈逐级降低趋势,PVA、COD去除率均达到80%左右;污泥特性研究表明,各隔室污泥呈黑色,粒径为0.1～0.5mm,VSS/SS=0.25,污泥的F420随着运行时间的延长而提高,表明PVA的加入有利于产甲烷菌在反应器中的截留,1#隔室污泥中产酸菌的数量高达109,对PVA的降解起重要作用,1#、2#隔室污泥中Si元素含量较高,3#、4#隔室污泥中Ca、Fe、S含量较高,1#隔室污泥表面松散,孔洞交错,菌丝以产酸菌为主,其余隔室污泥表面以丝状产甲烷菌为主.

Pilot study was conduced on anaerobic baffled reactor (ABR) treating poly vinyl alcohol (PVA) organic waste water. Microorganism possessed definite adaptability on PVA after 30 days' cultivation of ABR sludge; in operation stage the concentrations of PVA and COD in every compartment tended to decrease gradually; the removal rates of PVA and COD all reached about 80 percent. The study on characteristics of sludge showed that sludge in each compartment was black with particle diameter 0.1-0.5 mm, VSS/SS=0.25, F420 of sludge increased with the elongation of operation time, which showed that addition of PVA was favorable to retention of methanogenic bacteria in the reactor. The quantity of acidogenic bacteria in the sludge of 1# compartment reached 109, which played an important role in the degradation of PVA. The contents of Si element in the sludge of 1#, 2# compartments were relatively high; in the sludge of 3#, 4# compartments the contents of Ca, Fe, S were relatively high. The sludge surface in 1# compartment was loose with its surface holes crossed together and acidogenic bacteria as dominant hypha, while methanogenic bacteria were dominant in other compartments.