摘要
不锈钢废水中含大量的重金属、F和高浓度的NO3-,水质成份复杂,处理难度大。文章对该种废水生物脱氮的可行性进行了研究,考察了不同碳源、C/N比和运行方式对脱氮效果的影响。试验结果表明,以乙酸为外加碳源可获得最大反硝化速率;以葡萄糖为碳源,最佳C/N=5。SBR运行方式:短时进水,曝气0.5h,缺氧搅拌3.0h,闲置0.5h,每4h为一个运行周期,则不锈钢废水经生物处理后最终出水中NO3-<50mg/L,脱氮效率在95%以上。
It is very difficult to treat the the stainless-steel wastewater because of the high concentration nitrate, plenty of heavy metals and F-, and complex water quality. The possibility of its denitrification was investigated in the paper. Different carbon sources, C/N, and operation modes were discussed in detail, respectively. The experimental results showed that the maximum value of dinitrification velocity was achieved by using acetic acid as carbon source. Under the condition of using glucose as the added carbon source, C/N=5, SBR operation mode, i.e., aeration 0.5 h-anoxic mixed 3.0 h-sediment 0.5 h, the NO3-concentration in the effluent could be decreased to less than 50 mg/L and the removal efficiency was up to more than 95 %.
出处
《广东化工》
CAS
2009年第8期158-160,共3页
Guangdong Chemical Industry
关键词
不锈钢废水
硝化脱氮
碳源
SBR
the stainless-steelwastewater
denitrification
carbon sources
SBR
