合肥市城市中水回用系统分析及工艺优化研究.pdf

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1、合肥市城市中水回用系统分析及工艺优化研究摘要当前，合肥市属于水质型缺水城市，随着城市建设规模和人口数量的不断增多，城市的优质水资源紧缺将更加明显。本文通过对合肥市水资源供需平衡进行分析，提出污水资源化的必要性;结合国内外污水资源化的经验和合肥市的实际情况，提出了中水主要回用于工业冷却水、城市杂用水与生态环境用水等几个方面，并提出了相应的处理流程与水质标准;同时对合肥市的近远期中水需求量进行了预测，结合合肥市的城市布局规划与城市污水厂的布局规划，对合肥市的中水回用系统提出了一定的规划建议。本文还介绍了合肥市中水处理厂的工艺一一微絮凝直接过滤工艺的实际运行情况，考虑合肥市中水处理厂出水主要

2、回用于景观水体的实际情况，以中水厂的原水为研究对象，以除磷去浊为试验处理目标，对工艺参数进行优化试验研究，得出适合原水水质的最佳药品为聚合氛化铝铁，最佳的运行工况为聚合氯化铝铁的加药量为15mg/L，过滤速度为10m/h.最后对合肥市中水处理厂的运行成本进行计算分析，得出处理成本为0.354元/m3，具有很好的经济效益、环境效益与社会效益。关键词:合肥市中水回用微絮凝除磷优化TheanalysisofreclaimedwaterrecyclesystemandstudyofprocessoptimizationinHeFeicityAbstractCurrently,Hefeiisth

3、ecityforlackofgoodqualitywater.Alongwiththeunceasingincreaseofbuildingsizeandpopulation,thelackofsuperiorqualitywaterresourceswouldbecomemoreobvious.ItwasholdoutthatwastewaterutilizationwouldbenecessaryafterthebalanceanalysisofsupplyanddemandofthewaterresourcesinHeFei;accordingtotheexperienceofw

4、astewaterutilizationathomeandabroadandthepracticalsituationinHeFei,itwasholdoutthatthereclaimedwaterwasmostlyreusedinindustrycooling,urbangrayandecologyenvironment,andthecorrespondingtreatmentprocessandwaterqualitystandardwereholdoutinthemeantime.Aftertheforecastofdemandquantityinthenearandforwa

5、rdfuture,someplanningadviceswereholdoutontherecycledwatersystemcombiningwiththeplanningoftheurbanlayoutandurbansewagework.Theprocessofrecycledwatertreatmentworkwasmicro-flocculationfiltrationanditspracticalrunningstatuswasintroduced.Consideringthepracticalconditionthattherecycledwaterfromtheplan

6、wasmostlyusedinlandscapewaterbody,theoptimizationstudywasdonetakingthefloodingassubjectinvestigatedandthephosphorusandturbidityremovalasthetestaim.Andtheconclusionwasthattheoptimumflocculantwaspolyaluminiumferricchloride,andtheoptimaloperatingconditionwasthatthequantityofflocculantwas巧mg几andthef

7、iltrationspeedwasIOrn/h.Intheend,therunningcostwasreckonedtobe0.354andtherewereverygoodeconomic,environmentalandsocialbenefitKeywords:Hefeicity;Reclaimedwaterrecycle;Micro-flocculation;Phosphorusremoval;Optimize插图清单图瑰，份工艺流程图