DCCH型澄清池的性能试验研究

Performance of DCCH Type Clarifying Basin

文章通过现场试验和分析分别考察了混凝剂加药量,活性泥渣浓度,助凝剂,澄清池进水流量和机械搅拌力度因素对DCCH型澄清池出水残余浊度的影响。试验表明增加混凝剂加药量可改善出水水质,但药量过量会使残余浊度上升;在一定范围内增加反应区活性泥渣沉降比澄清池残余浊度降低,且残余浊度与活性泥渣浓度符合一级反应动力学规律;助凝剂可改善絮体结构使残余浊度降低,但从经济环保角度出发应尽量减少使用量;增加进水流量使残余浊度上升,上升幅度主要取决于澄清池形成絮体的结构;适当增加机械搅拌力度能有效的降低澄清池残余浊度。

Capability test and theoretic analysis were employed to investigate the effect of coagulant agent dosage, concentration of activated sludge, coagulant aid, influent flow of clarifying basin and frequency of mixer on effluent turbidity of clarifying basin. Results showed increasing the dosage of coagulant agent in a fixed range could improve water quality while excess dosage would give colloid charge reversal and turbid water. Optimum increasing of settlement rate in the reaction zone would be effective in reducing the turbidity, and it appeared to be a first-order reaction. Coagulant aid was helpful to decrease the＇ turbidity by improving the activated sludge flocculants structure. Turbidity rising with the increasing of influent flow in clarifying basin, and the rising mainly depended upon the activated sludge flocculants structure. Optimum frequency of mixer could reduce the turbidity effectively.