移动床生物膜反应器预处理含酚废水

Pretreatment of Phenol-containing Wastewater in Moving Bed Biofilm Reactor

采用两级移动床生物膜反应器（MBBR）预处理高挥发酚含量的石化厂汽提净化水,考察了HRT和DO对废水中挥发酚和COD去除效果的影响.实验结果表明：在两级MBBR总HRT为10h、MBBR中部废水DO为1-3 mg/L的条件下,装置连续运行处理ρ（挥发酚）=110-201 mg/L、COD=644-1 827 mg/L、BOD5/COD=0.15-0.69的废水,两级MBBR处理后出水平均ρ（挥发酚）为17.6 mg/L,挥发酚去除率达87.9％;平均COD为745 mg/L,COD去除率为32.7％;出水BOD5/COD平均为0.68,表明经过两级MBBR处理后,废水的可生化性有所提高,有利于废水的后续生化处理.

A pilot-scale two-stage moving bed biofilm reactor （MBBR） was used to pretreat the stripping purified water with high phenol concentration in a petroleum refinery. The effects of HRT, DO on degradation of volatile phenol and COD in the wastewater were investigated. The experimental results show that： Under the conditions of total HRT 10 h, DO at middle of the MBBR 1-3 rag/L, the wastewater with 110-201 mg/L of p （volatile phenol）, 644-1 827 mg/L of COD, 0.15-0.69 of BODJCOD was pretreated in the two-stage MBBR with continuous running, and the average p （volatile phenol） of the effluent is 17.6 mg/L with 87.9% of removal rate, the average COD is 745 mg/L with 32.7% of removal rate, and the average BODJCOD is 0.68. The experimental results demonstrate that the biodegradability of the wastewater is improved.