耦合臭氧和中空纤维膜生物反应器强化处理气态二甲苯混合物。

Coupling ozone and hollow fibers membrane bioreactor for enhanced treatment of gaseous xylene mixture.

机构信息

State Environmental Protection Key Laboratory of Risk Assessment and Control on Chemical Processes, East China University of Science & Technology, Shanghai 200237, PR China.

出版信息

Bioresour Technol. 2013 Feb;130:52-8. doi: 10.1016/j.biortech.2012.11.106. Epub 2012 Dec 5.

DOI:10.1016/j.biortech.2012.11.106

PMID:23313665

Abstract

Two hollow fiber membrane bioreactors (HFMBRs) inoculated with activated sludge were used in series to biodegrade continuously mixed xylene. The influence of gas residence time (τ) and mass loading rate (LR) on elimination capacity (EC) of the mixed xylene was investigated. A maximum elimination capacity (EC(max,v)) of 466gm(-3)h(-1) was achieved at τ=10s and LR(v)=728gm(-3)h(-1). Thereafter, ozone was introduced into inlet gas and the influence of ozone was investigated. Results showed that the maximum xylene elimination capacity increased from 524gm(-3)h(-1) to 568gm(-3)h(-1) and 616gm(-3)h(-1) at τ=10s, respectively when the inlet ozone concentration rose from 200mgm(-3) to 400mgm(-3) and 600mgm(-3), respectively. HFMBR coupled with O(3) has higher performance and stability for the long-term operation at the same condition.

摘要

两个接种活性污泥的中空纤维膜生物反应器（HFMBR）串联连续降解混合二甲苯。考察了气体停留时间（τ）和质量负荷率（LR）对混合二甲苯去除能力（EC）的影响。τ=10s 时，LR（v）=728gm（-3）h（-1），达到最大去除能力（EC（max，v））466gm（-3）h（-1）。此后，向进气中引入臭氧，并考察了臭氧的影响。结果表明，当进气中臭氧浓度分别从 200mgm（-3）上升至 400mgm（-3）和 600mgm（-3）时，τ=10s 时，二甲苯的最大去除能力分别从 524gm（-3）h（-1）增加至 568gm（-3）h（-1）和 616gm（-3）h（-1）。在相同条件下，HFMBR 与 O（3）耦合具有更高的性能和稳定性，适用于长期运行。