CIESC Journal ›› 2012, Vol. 63 ›› Issue (5): 1558-1565.DOI: 10.3969/j.issn.0438-1157.2012.05.034

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Toxicity of high-sulfate pharmaceutical wastewater and performance of SPAC process

LU Huifeng,ZHENG Ping,ZHANG Meng,ZHANG Jiqiang,DING Shuang   

  1. Department of Environmental Engineering,Zhejiang University
  • Received:2011-10-23 Revised:2012-02-03 Online:2012-05-05 Published:2012-05-05
  • Contact: ZHENG Ping Zheng

高浓度制药废水毒性与SPAC反应器运行性能

陆慧锋,郑平,张萌,张吉强,丁爽   

  1. 浙江大学环境工程系
  • 通讯作者: 郑平

Abstract: The acute toxicity of typical pollutants (sulfate and sulfide)in high-sulfate pharmaceutical wastewater and effluent from SPAC reactor was tested using the 15 min half inhibitory concentration (IC50)to photobacterium.The results showed that the IC50 of sulfate and sulfide was 12077.8,78.1 mg·L-1,respectively; the IC50 of raw pharmaceutical wastewater,effluents from SPAC reactor with influents of 6-fold and 3-fold dilution were 64.5,44.7 and 78.9 times,respectively.The maximum volumetric COD,sulfate removal rates of SPAC reactor were 5.76,1.83 kg·m-3·d-1,COD and sulfate removal efficiency were 54.1% and 71.8% when the influent concentration was increased at a fixed HRT; the maximum volume COD,sulfate removal rates were 7.52,1.90 kg·m-3·d-1,COD and sulfate removal efficiency was 72.8% and 80.0% when the HRT was shortened at a fixed influent concentration.Low concentrations with high-flow rate made SAPC reactor run more efficiently.If the influent concentration exceeds inhibition concentration threshold,the pharmaceutical wastewater has a significant effect on performance of SPAC reactor.However,SPAC process showed a good ability to adapt the toxicity of high-sulfate pharmaceutical wastewater after a long term operation (about 3 months).The raw pharmaceutical wastewater should be diluted more than 5.13 folds to avoid the inhibition at the beginning of operation,while influent concentration could be increased to a dilution of 3.32-fold to cut the operation cost in the later.

Key words: high-sulfate pharmaceutical wastewater, toxicity of waste water;SPAC anaerobic reactor, process performance, operation strategies

摘要: 采用发光细菌法测试了高浓度硫酸盐制药废水中典型污染物(硫酸盐)、转化产物(硫化物)、供试制药废水原水、稀释6倍厌氧处理出水和稀释3倍厌氧处理出水的毒性,硫酸盐、硫化物的半抑制浓度分别为12077.8、78.1 mg·L-1;供试制药废水原水、稀释6倍厌氧生物处理出水和稀释3倍厌氧生物处理出水的半抑制浓度分别为64.5、44.7和78.9倍。试验了SPAC厌氧反应器处理高浓度硫酸盐制药废水的运行性能,高浓度低流量运行时,反应器最大容积COD、硫酸盐(以SO42-计,下同)去除速率分别为5.76、1.83 kg·m-3·d-1,COD和硫酸盐去除率分别为54.1%和71.8%;低浓度高流量运行时,反应器的最大容积COD、硫酸盐去除速率分别为7.52、1.90 kg·m-3·d-1,COD和硫酸盐去除率分别为72.8%和80.0%。低浓度高流量运行更易使反应器取得高效。试验了SPAC厌氧反应器对高浓度硫酸盐制药废水毒性抑制的适应性能,运试初期宜将废水稀释5.13倍以上,运试后期可将原水稀释3.32倍。

关键词: 高浓度硫酸盐制药废水, 废水毒性, SPAC厌氧反应器, 工艺性能, 控毒策略

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