摘要：

某工业园区污水处理厂设计规模6.0万m³/d（分两期），一期3.0万m³/d，主要处理光伏企业废水。根据进水水质和排放标准，设计采用高密度沉淀+水解酸化+AAO+高密度沉淀+臭氧氧化+生物滤池组合工艺，并配套生态安全缓冲区。生态安全缓冲区采用表面流人工湿地形式，按照一、二期总排放规模4.2×10⁴ m³/d设计。两段高密度沉淀工艺保障氟化物达标（≤1.5 mg/L），臭氧氧化耦合生物滤池降解难降解COD，生态缓冲区进一步净化尾水。污水处理厂运行近1 a来，平均出水COD为18 mg/L，氟化物为1.1 mg/L，出水指标均满足江苏省《城镇污水处理厂污染物排放标准》（DB 32/4440—2022）中A标准。工程系统运行稳定、抗冲击负荷能力强、出水达标，吨水成本4.2元，兼具环境、社会与经济效益，可为高标准工业含氟废水处理及生态化转型提供示范。

关键词: 光伏废水, 高密度沉淀, 生化处理, 臭氧氧化, 生物滤池, 人工湿地, 生态安全缓冲区

Abstract:

The wastewater treatment plant from an industrial park was designed with a capacity of 60 000 m³/d (divided into two phases), with phase Ⅰ handling 30 000 m³/d, primarily for treating photovoltaic industry wastewater. Based on water quality of influent and discharge standards, the design employed a combined process of high-density sedimentation+hydrolytic acidification+AAO+high-density sedimentation+ozonation+biological filtration, supplemented by an ecological safety buffer zone. The ecological safety buffer zone adopted a surface flow constructed wetland, designed for the total discharge capacity of both phases (42 000 m³/d). The two-stage high-density sedimentation process ensured fluoride compliance (≤1.5 mg/L), ozonation coupled with biological filtration degraded recalcitrant COD, and the ecological buffer zone further purified the effluent. Over nearly one year of operation, the average effluent COD was 18 mg/L and fluoride was 1.1 mg/L, meeting all Class A standards specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (DB 32/4440—2022) in Jiangsu Province. The system was operated stably, which demonstrated strong resistance to shock loads, and consistently achieved compliant effluent quality. With treatment cost of 4.2 yuan/t, the project demonstrated environmental, social, and economic benefits, serving as a model for high-standard treatment and ecological transformation of industrial fluoride-containing wastewater.

Key words: photovoltaic wastewater, high density sedimentation, biochemical treatment, ozonation, biological filter, constructed wetland, ecological security buffer zone

中图分类号: 

• X52

• X703.1