磁加载多效澄清技术在城市黑臭水体治理和城市生活污水处理中的应用案例

Application of magnetic ballasted clarification technology in black and smelly water treatment and domestic sewage treatment

磁加载多效澄清技术通过在混凝反应中加入磁粉,利用磁粉密度、粒径、表面电荷、矫顽力等作用提高混凝效果,增强絮体沉降性能,缩短混凝沉淀时间并有效提高出水水质。将磁加载多效澄清技术用于大兴某黑臭水体治理工程中,在进水水质变化条件下,出水浊度和TP均稳定在5 NTU和0.5 mg·L^(−1)以下,表现出较好的抗冲击负荷能力和系统稳定性。在黑龙江某污水处理厂的污水深度处理中,出水SS和TP可控制在一级A排放标准以下。磁加载多效澄清技术具有抗冲击能力强、出水优良、运行费用低、占地面积小等优势,在污水处理、水环境治理领域有很好的应用前景。

Magnetic ballasted clarification is the enhanced coagulation and sedimentation process by the ballasted reaction with magnetic particles addition and recovery.In the reaction,the coagulation efficiency and flocs settling performance and the effluent quality are enhanced greatly due to the positive effects by the higher density,particle size,surface charge,and the coercivity of the magnetic particles.In the treatment and remediation of a black and odorous water body in Daxing district,Beijing,magnetic ballasted clarification achieved stable effluent turbidity and TP below 5 NTU and 0.5 mg·L-1 respectively regardless of significant variation of influent quality.This indicates strong resistance against variations in influent pollutant load and shows high stablibility of sewage treatement.In a tertiary wastewater treatment processin Heilongjiang province,the effluent SS and TP achieved Class 1A discharge standard by applying this technology.Therefore,the one stage magnetic clarifier with multi-effects is potentially valuable for the treatment of sewage due to the the advantages of stable performance,good efficiency,low operating cost,and low land requirement.