高盐选矿药剂生产废水处理工程实例
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摘要
选矿药剂生产废水具有硫化物高、含盐量高、有机物浓度高等特点,沈阳市某企业采用具有源水混合稀释的曝气脱硫-A/O组合工艺对高盐选矿药剂生产废水进行处理。结果表明,高浓度选矿药剂生产尾液与厂区其他废水混合稀释后,在平均进水COD为2 638.4 mg/L、NH_4~+-N为65.4 mg/L、S~(2-)为92.4 mg/L的情况下,稳定后处理出水平均COD为219.1 mg/L、NH_4~+-N为27.6 mg/L、S~(2-)为0.5 mg/L,去除率分别高达91.70%、57.80%和99.46%。该组合工艺有效避免了高盐、高硫等不利因素对生化处理的负面影响,出水水质可稳定满足辽宁省《污水综合排放标准》(DB 21/1627—2008)中排入城镇污水处理厂收集管网系统的标准,具有处理效果稳定、运行管理简便等优势。
The wastewater from beneficiation reagents production contained high level of salinity,sulfide and organic pollutants.A combined process of aeration desulfurization-A/O was employed in the project of wastewater treatment from the beneficiation reagents production in some mineral chemistry processing plant in Shenyang.The results showed that after the high strength production wastewater was mixed with other kinds of wastewater,the average original concentrations of COD,NH_4~+-N and S~(2-)were respectively 2 638.4 mg/L,65.4 mg/L and 92.4 mg/L.After treatment via the combined process,the average effluent concentrations of COD,NH_4~+-N and S~(2-)after stable operation were 219.1 mg/L,27.6 mg/L and 0.5 mg/L,the relative final removal rates reached 91.70%,57.80%and 99.46%.The effluent quality could reach the demand of discharging into municipal wastewater treatment plants in Integrated Wastewater Discharge Standard of Liaoning Province(DB 21/1627-2008).The negative impacts of high salinity and sulfide concentrations on the microorganisms activity was avoided in the combined process,so the process had advantages including operation stability and convenience.
The wastewater from beneficiation reagents production contained high level of salinity,sulfide and organic pollutants.A combined process of aeration desulfurization-A/O was employed in the project of wastewater treatment from the beneficiation reagents production in some mineral chemistry processing plant in Shenyang.The results showed that after the high strength production wastewater was mixed with other kinds of wastewater,the average original concentrations of COD,NH_4~+-N and S~(2-)were respectively 2 638.4 mg/L,65.4 mg/L and 92.4 mg/L.After treatment via the combined process,the average effluent concentrations of COD,NH_4~+-N and S~(2-)after stable operation were 219.1 mg/L,27.6 mg/L and 0.5 mg/L,the relative final removal rates reached 91.70%,57.80%and 99.46%.The effluent quality could reach the demand of discharging into municipal wastewater treatment plants in Integrated Wastewater Discharge Standard of Liaoning Province(DB 21/1627-2008).The negative impacts of high salinity and sulfide concentrations on the microorganisms activity was avoided in the combined process,so the process had advantages including operation stability and convenience.
引文
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[2]王基成,王建娜,潘成峰,等.驯化耐盐活性污泥处理高盐度工业废水[J].中国给水排水,2007,23(19):83-86.
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