摘要
采用混凝/沉淀工艺处理某高校校园的路面初期雨水径流,并对其弃流问题进行了探讨。结果表明,最佳混凝剂为聚合氯化铝(PAC),其最佳投量为20～35 mg/L;混凝/沉淀工艺对初期雨水的浊度、COD的去除率较高,均可达90%以上;不预沉的初期雨水径流的混凝/沉淀效果明显优于预沉后的;综合考虑初期雨水弃流装置的建设、运行、维护、管理等因素,建议校园或类似区域宜选择初期雨水不弃流,将收集到的全部雨水经混凝/沉淀处理后再利用。
The coagulation/sedimentation process was applied to treat road first flush runoff in a campus, and the split-flow was discussed. The results show that the best coagulant is polyaluminium chloride （PAC） , and its optimal dosage is 20 to 35 mg/L. The removal rates of turbidity and COD from the first flush by coagulation/sedimentation process are high, both reaching more than 90%. The coagulation/sedimentation efficiency of the first flush without pre-sedimentation is obviously better than that with pre-sedimentation. Considering the factors of construction, operation, maintenance and management of first flush removal devices, the initial split-flow in campus or similar district is not suggested. All rainwater runoff collected can be reused after the coagulation/sedimentation treatment.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第19期106-108,共3页
China Water & Wastewater
基金
天津科技支撑重点项目(08ZCGYSF00100)
国家水体污染控制与治理科技重大专项(2008ZX07314-004)
关键词
初期雨水径流
弃流
混凝
预沉
first flush runoff
split-flow
coagulation
pre-sedimentation
