详细信息
根据大湖湖泊水体污染情况,对大湖重金属污染水体进行治理,拟按如下路线进行:
①现场建设一座污水预处理池,用于对湖水、底泥脱水过程产生的尾水和施工过程产生的废水进行预处理;
②大湖上层湖水上(约1.5m)经反应沉淀池预处理达到《污水综合排放标准(GB8978-1996)》后排入霞湾港中;
采用“石灰+PAC强化反应沉淀技术”作为本项目重金属污染水体处理的技术,清除水中的汞、铅、镉、铜、砷等重金属。
③下层湖水、施工废水以及底泥脱水过程中产生的尾水经反应沉淀池预处理后排入清水塘工业废水处理利用厂进行处理,达标后排入湘江。
从预处理池至清水塘工业废水处理利用厂,将经过预处理的废水送至清水塘工业废水处理利用厂进行处理,处理后水质达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级B标准。
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