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针对水厂原水夏季锰超标带来的出厂水浊度、色度超过滤后水的问题,经对比试验和分析论证采用液氯氧化除锰方案.通过在预氧化接触池投加氯,出厂水中锰从原水的0.1-2.0mg/L降低到0.05 mg/L以下,色度从原水的50-80度降低至5度,工艺简单,易于操作.同时调查分析了水厂锰的来源及变化,并针对水厂设计以及液氯除锰中需... 相似文献
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针对嘉兴市内河水质持续恶化的现状,提出嘉兴市城乡供水的当务之急是寻找合格的饮用水源。介绍了嘉兴市太湖引水的规划方案与实施情况,并进行了详细的技术与经济分析。 相似文献
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粉末活性炭强化处理京杭运河常州段微污染原水 总被引:1,自引:0,他引:1
以京杭运河常州段微污染原水为研究对象,对其进行常规处理的同时增投粉末活性炭(PAC),通过静态吸附试验考察了最佳的投炭点和投加量.结果表明,投炭点在净水工艺流程中越靠前,则PAC对污染物的吸附效果越好;增投粉末活性炭可大幅度提高对有机污染物的去除效果;粉末活性炭的最佳投加点为吸水井,最佳投量为30 mg/L. 相似文献
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某水厂斜管沉淀池清水区经常出现大量絮体突然上浮聚集于池面的现象。部分上浮的细碎絮体随出水进入滤池使滤池的反冲次数增加,过滤周期缩短。现象的机理可解释为“加压溶气气浮”。分析甄别了产生这一现象的成因,主要是取水泵挟气和原水中不同程度含有表面活性剂等污染物,而且与原水浊度、混凝剂投加量相关。针对主要原因提出了解决问题的方案。 相似文献
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Neal C House WA Jarvie HP Neal M Hill L Wickham H 《The Science of the total environment》2005,344(1-3):107-128
Variations in phosphorus (P) concentrations in an agriculturally impacted river draining a Chalk aquifer and an associated canal in the west of the Thames Basin, southern England are examined and linked to agricultural and sewage sources and within river/canal process controls. The study area comprises the River Dun, the adjacent River Kennet and the Kennet and Avon (K&A) Canal. Large seasonal variations are observed for soluble reactive phosphorus (SRP) and dissolved silicon (Si) with low concentrations in the spring and summer times when biological activity is high. The K&A Canal shows the largest SRP and Si concentration declines. This reflects high biological activity coupled with higher temperatures and higher water residence times. The extent of SRP removal is examined in relation to organic (uptake/release with phytoplankton growth/decay) and, to a lesser extent, inorganic (SRP coprecipitation with calcite) mechanisms. Boron (B) is used as a tracer of sewage sources. Agricultural inputs of both dissolved and particulate P (PP) can be important particularly under conditions where the catchment is wet and near surface/overland flow is important: sewage treatment works effluent and septic tank discharges to groundwater also probably provide a major component of the SRP occurring within the water column. The canal, and to a lesser extent the river, acts as sink for P in sewage effluent sources due to the high biological activity especially during the spring and summer. The aquifer probably acts as a major sink for agricultural and septic tank inputs of P. 相似文献
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论述了绘制沉淀池等浊度曲线的作用,根据等浊度曲线可以对比不同种类药剂的处理效果,确定同一药剂投加于不同水质、不同负荷沉淀池时的最佳药剂投加量,以及不同原水温度下沉淀池最佳的运行负荷、最为经济的药剂投加量,找出影响沉淀效果的主要因素并采取相应的调整措施。等浊度曲线的走势也可以反映具体絮凝颗粒所受的水体动力学影响。并通过实测的等浊度曲线探讨了该曲线对沉淀池实际生产运行的指导意义。 相似文献
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浮沉池中斜板装置对气浮运行效果的影响研究 总被引:3,自引:0,他引:3
以松花江水为原水,研究了浮沉池内部侧向流斜板装置对气浮运行效果的影响.试验结果表明,斜板装置对气浮净水效果具有一定的不利影响:对于低浊水基本无影响;随着原水浊度和浮渣层厚度的增加,不利影响略有增加;加入斜板装置后落渣现象严重,排渣周期有缩短趋势.由于气浮分离区上部固有的分层流结构受斜板装置的影响较小,因此对有机污染物的去除效果影响不大. 相似文献
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四段式生物接触氧化池预处理微污染珠江原水研究 总被引:10,自引:0,他引:10
利用广州市白鹤洞水厂闲置的一组回转式隔板絮凝池,通过加装填料和曝气设备构建了四段式生物接触氧化池,并采用其预处理微污染珠江原水。结果表明,该工艺对NH3-N、CODMn和浊度的去除效果良好,末段出水的NH3-N、CODMn和浊度平均值分别为0.41mg/L、3.41mg/L、16.5 NTU,相应的平均去除率分别为92.03%、47.85%和61.09%。该工艺对氨氮的去除较为高效,是处理高氨氮微污染原水的一种有效方法。 相似文献
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The occurrence and removal of phthalates in a trickle filter STW 总被引:2,自引:0,他引:2
This study investigated the fate of phthalates in a trickle filter sewage treatment works. A wide variety of phthalates were researched of which only two were present in significant amounts. Mean concentrations of di-(2-ethylhexyl) phthalate (DEHP) and diethyl phthalate (DEP) measured throughout the system were 23.6 and 25.0 microg/l in raw sewage, 22.0 and 24.8 microg/l in primary, 14.6 and 0.60 microg/l in trickle filter, 18.6 and 0.10 microg/l in humus tank and 18.5 and 0.40 microg/l in reedbed effluents, respectively. Removal by the trickle filter was constantly high for DEP (94-99%) whereas DEHP was variable (<1-44%). Mean concentrations of DEHP and DEP in raw sludge were 30.2 and 1.60 microg/g dry wt, respectively. A mass balance for DEHP was calculated using data from field studies and estimates of sludge production at the works. The mass balance approach helped to provide information that could be used to improve the design and operation of sewage treatment works. 相似文献
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根据辐流沉淀池近三年的单池负荷、原水浊度以及混凝剂投加量数据,绘制了混凝剂投加量与浊度、单池负荷之间的曲线关系图,并介绍了混凝剂投加曲线的应用,以期对现实生产起指导作用。 相似文献
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混凝-粉末活性炭工艺处理京杭运河微污染原水研究 总被引:1,自引:0,他引:1
针对京杭运河常州段原水水质情况,通过静态烧杯试验研究了混凝-粉末活性炭工艺对水中浊度、有机物等主要污染物的去除效果.试验结果表明,混凝可以有效去除浊度,去除率达97.3%;活性炭对有机物去除效果明显,其最佳投加量为30 mg/L.混凝剂对比试验表明,聚合氯化铝(PAC)和聚合硫酸铁(PFS)对臭和味、色度具有相同的去除效果;PFS对UV254、挥发酚的去除效果优于PAC,而对浊度、CODMn的去除效果较PAC差. 相似文献
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东莞运河樟村水质净化厂是目前国内最大的污染河道水质净化厂,其污泥处理采用重力浓缩/机械脱水工艺.一期工程于2004年春季投入生产运行后,污泥处理系统存在浓缩池浓缩效果不佳、浓缩池未设计放空系统、污泥脱水机脱水能力不足、泥饼含水率不能达标和污泥脱水机房操作环境恶劣等问题.为此提出了增加浓缩池加药和放空系统、增加机械浓缩机和离心脱水机系统以及增加脱水机房除臭系统等技改方案.2005年-2006年实施改造后,有效解决了污泥处理系统处理能力不足和泥饼含水率不能达标等问题,改善了厂区员工的生产操作环境和厂区环境,达到了预期效果. 相似文献