液晶面板工业尾水深度处理中试
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摘要
深圳市某液晶面板工业尾水具有机物浓度低、硝态氮及总氮含量高、BOD5/COD值<0.1的特点。现应用立体生态污水处理技术对该尾水进行中试规模深度处理。运行90 d后,反应池表面水生植物生长状况良好,填料及植物根系微生物挂膜情况较佳,微生物量较大。COD、氨氮、硝态氮和总氮去除率分别为63%、48%、55%和68%,其中,硝态氮和总氮去除率比现有实际深度处理工艺出水分别高35和45百分点。对中试进出水进行GC-MS分析得出,尾水中部分含氮杂环有机物得到降解,并生成其他有机中间产物。
Secondary effluent from a liquid crystal display( LCD) industrial wastewater treatment plant in Shenzhen contains low concentration organic matter,high concentration nitrate and total nitrogen,and its BOD5/COD was even lower than 0. 1.Pilot scale ecological-biological combined system was applied to treat the LCD tail water for reuse. After 90-day operation,the aquatic plants grew well,the microbial biomass on filler and plant roots was large. In addition,COD,ammonia,nitrate and total nitrogen( TN) removal efficiencies reached up to 63%,48%,55% and 68%,respectively. The nitrate and TN removal efficiencies were 35% and 45% higher than that of the advanced treatment plant. Using GC-MS analysis,several nitrogenous heterocyclic compounds were degraded and several organic intermediates appeared in the effluent.
Secondary effluent from a liquid crystal display( LCD) industrial wastewater treatment plant in Shenzhen contains low concentration organic matter,high concentration nitrate and total nitrogen,and its BOD5/COD was even lower than 0. 1.Pilot scale ecological-biological combined system was applied to treat the LCD tail water for reuse. After 90-day operation,the aquatic plants grew well,the microbial biomass on filler and plant roots was large. In addition,COD,ammonia,nitrate and total nitrogen( TN) removal efficiencies reached up to 63%,48%,55% and 68%,respectively. The nitrate and TN removal efficiencies were 35% and 45% higher than that of the advanced treatment plant. Using GC-MS analysis,several nitrogenous heterocyclic compounds were degraded and several organic intermediates appeared in the effluent.
引文
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[3]程恒卫,张景成,张彦平,等.FBR工艺处理生活污水试验研究[J].水处理技术,2008,34(2):74-77.
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