苏南地区小区双水源中水处理工艺中絮凝剂优化的研究
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摘要
本研究的目的在于优化混凝过程为双水源中水回用提供经济合理的工艺途径,对苏州某小区优质杂排水和雨水双水源原水进行混凝沉淀实验。通过讨论投药种类、投药量、搅拌强度、pH等因素对混凝效果的影响,筛选出效果最理想的絮凝剂与助凝剂,确定了双水源不同水量配比(因季节与地点而变)下,絮凝剂与助凝剂的最佳投配比以及其混凝工艺的最佳运行条件,为研究混凝沉淀法处理双水源小区中水的一般规律提供依据。
通过几种常用絮凝剂与助凝剂的筛选实验,以浊度为指标考查其对优质杂排水和雨水处理效果的影响。实验筛选出效果最优的絮凝剂和助凝剂。通过复配实验,考查对于不同水量配比原水,絮凝剂与助凝剂最佳复配浓度。采用三水平四因素的正交实验方法对最佳水力条件进行了探讨并作优化选择,确定了双水源中水回用工艺的最佳水力条件。通过pH值实验,研究了pH值的变化对各指标去除率的影响。以雨水与优质杂排水的不同水量配作为原水进行模拟实验,得出了最佳工艺条件。
通过对混凝沉淀工艺所做的经济分析,采用混凝沉淀工艺处理小区双水源中水经济高效、技术可行,在中水处理领域具有很好的应用前景。
This article aims to provide economic and reasonable way for dual-source water reuse technology by optimizing the coagulation process. The study has been carried on coagulation and sedimentation with double water sources from a distract of SuZhou. The effects of the kind of coagulant, the optimal adding dose, stirring intensity, pH, etc. on the coagulation and sedimentation have been analyzed. As a result the optimal flocculant and flocculant aid have been obtained. The optimal doses of flocculant and flocculant aid as well as the optimal parameters of coagulating process are determined for the seasonal ratio of the drainage and rainwater in raw water to provide the basis for general laws of the coagulation treatment of dual-source water reuse.
In coagulant filtration experiments, the effect of dual-source water weighed by target of turbidity removal was observed. By experimental study the optimal flocculant and flocculant aid have been obtained for the recycling water treatment process with double water sources of superior drainage and rainwater. The best compound concentrations of flocculant and flocculant aid for different volume ratio of raw water were determined though mixed experiment. Through the orthogonal experimental design, the optimal hydraulic conditions and optimal choices have been explored by this study. Experimental results show that the best hydraulic conditions can be identified. Through the pH value of the experiments, the study investigated the effect of different pH value on the removal of various indicators. Selecting the four groups of raw water, this study carried out simulation experiments. This article find out the optimum conditions derived from the experiments.
The economic analysis of the coagulation and sedimentation process is conducted in the test. The Coagulation and sedimentation process is an economical, high-efficient and feasible process in treating the reclaimed water. The process has a good application prospect in the pollutant removal of reclaimed water reuser in China.
通过几种常用絮凝剂与助凝剂的筛选实验,以浊度为指标考查其对优质杂排水和雨水处理效果的影响。实验筛选出效果最优的絮凝剂和助凝剂。通过复配实验,考查对于不同水量配比原水,絮凝剂与助凝剂最佳复配浓度。采用三水平四因素的正交实验方法对最佳水力条件进行了探讨并作优化选择,确定了双水源中水回用工艺的最佳水力条件。通过pH值实验,研究了pH值的变化对各指标去除率的影响。以雨水与优质杂排水的不同水量配作为原水进行模拟实验,得出了最佳工艺条件。
通过对混凝沉淀工艺所做的经济分析,采用混凝沉淀工艺处理小区双水源中水经济高效、技术可行,在中水处理领域具有很好的应用前景。
This article aims to provide economic and reasonable way for dual-source water reuse technology by optimizing the coagulation process. The study has been carried on coagulation and sedimentation with double water sources from a distract of SuZhou. The effects of the kind of coagulant, the optimal adding dose, stirring intensity, pH, etc. on the coagulation and sedimentation have been analyzed. As a result the optimal flocculant and flocculant aid have been obtained. The optimal doses of flocculant and flocculant aid as well as the optimal parameters of coagulating process are determined for the seasonal ratio of the drainage and rainwater in raw water to provide the basis for general laws of the coagulation treatment of dual-source water reuse.
In coagulant filtration experiments, the effect of dual-source water weighed by target of turbidity removal was observed. By experimental study the optimal flocculant and flocculant aid have been obtained for the recycling water treatment process with double water sources of superior drainage and rainwater. The best compound concentrations of flocculant and flocculant aid for different volume ratio of raw water were determined though mixed experiment. Through the orthogonal experimental design, the optimal hydraulic conditions and optimal choices have been explored by this study. Experimental results show that the best hydraulic conditions can be identified. Through the pH value of the experiments, the study investigated the effect of different pH value on the removal of various indicators. Selecting the four groups of raw water, this study carried out simulation experiments. This article find out the optimum conditions derived from the experiments.
The economic analysis of the coagulation and sedimentation process is conducted in the test. The Coagulation and sedimentation process is an economical, high-efficient and feasible process in treating the reclaimed water. The process has a good application prospect in the pollutant removal of reclaimed water reuser in China.
引文
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