A study on flocculation control based on fractal theory was carried out. Optimization test of chemical coagulant dosage confirmed that the fractal dimension could reflect the flocculation degree and settling character...A study on flocculation control based on fractal theory was carried out. Optimization test of chemical coagulant dosage confirmed that the fractal dimension could reflect the flocculation degree and settling characteristics of aggregates and the good correlation with the turbidity of settled effluent. So that the fractal dimension can be used as the major parameter for floc-culation system control and achieve self-acting adjustment of chemical coagulant dosage. The fractal dimension flocculation control system was used for further study carried out on the effects of various flocculation parameters, among which are the dependency relationship among aggregates fractal dimension, chemical coagulant dosage, and turbidity of settled effluent under the conditions of variable water quality and quantity. And basic experimental data were obtained for establishing the chemical coagulant dosage control model mainly based on aggregates fractal dimension.展开更多
在服务市民的公用事业中,饮用水安全一直是社会关注的焦点。危害分析与关键控制点体系(hazard analysis critical control point,HACCP)是国际上认可和接受的食品安全保证体系。在发达国家,应用HACCP管控理念保障水质已有多年的实践,深...在服务市民的公用事业中,饮用水安全一直是社会关注的焦点。危害分析与关键控制点体系(hazard analysis critical control point,HACCP)是国际上认可和接受的食品安全保证体系。在发达国家,应用HACCP管控理念保障水质已有多年的实践,深圳水务集团借鉴先进供水管理经验,对水质管理现状及存在的问题进行深入分析,对供水全流程、管理全链条潜在的水质危害进行全面识别与评估,探索建立了饮用水HACCP体系,实现全过程水质管控,强调预防性管理。实施过程中以信息化为支撑点、以监督检查为着力点,在提升供水水质和供水管理模式的探索上取得了良好成效,可为供水行业水质管理提供借鉴。展开更多
基金Project (No. 2002AA601120) supported by the Hi-Tech Researchand Development Program (863) of China
文摘A study on flocculation control based on fractal theory was carried out. Optimization test of chemical coagulant dosage confirmed that the fractal dimension could reflect the flocculation degree and settling characteristics of aggregates and the good correlation with the turbidity of settled effluent. So that the fractal dimension can be used as the major parameter for floc-culation system control and achieve self-acting adjustment of chemical coagulant dosage. The fractal dimension flocculation control system was used for further study carried out on the effects of various flocculation parameters, among which are the dependency relationship among aggregates fractal dimension, chemical coagulant dosage, and turbidity of settled effluent under the conditions of variable water quality and quantity. And basic experimental data were obtained for establishing the chemical coagulant dosage control model mainly based on aggregates fractal dimension.
文摘在服务市民的公用事业中,饮用水安全一直是社会关注的焦点。危害分析与关键控制点体系(hazard analysis critical control point,HACCP)是国际上认可和接受的食品安全保证体系。在发达国家,应用HACCP管控理念保障水质已有多年的实践,深圳水务集团借鉴先进供水管理经验,对水质管理现状及存在的问题进行深入分析,对供水全流程、管理全链条潜在的水质危害进行全面识别与评估,探索建立了饮用水HACCP体系,实现全过程水质管控,强调预防性管理。实施过程中以信息化为支撑点、以监督检查为着力点,在提升供水水质和供水管理模式的探索上取得了良好成效,可为供水行业水质管理提供借鉴。