活性炭吸附过滤消毒一体化技术

技术简介：①用于原水浑浊度低于100NTU的条件;②采用较小滤速;③进水加入片状速溶消毒剂,过滤同时完成消毒,消毒剂采用高剂量投加。 功能与用途：用于除浊、微生物消毒和有机物去除。     

宁波市东钱湖水厂工艺设计

宁波市东钱湖水厂供水规模50万m3/d,现阶段要求出厂水浊度≤0.1NTU,pH不低于7.3,后期要求达到自来水直接饮用即符合《饮用净水水质标准》(CJ94—1999)的要求,且不得检出隐孢子虫和贾第虫,灭活率分别达到99%和99.9%。通过对其原水水质分析和对类似水厂的大量调查研究,提出采用常规水处理工艺并加强混凝、过滤等工程措施来满足现阶段出厂水水质要求,并建议后期根据原水水质变化情况和出厂水水质要求,增加臭氧-活性炭深度处理工艺。简要介绍了主要构建筑物工艺设计。包括设计参数、设备配置和加药消毒设施等,并对工艺设计特点进行了总结。     

石灰软化-超滤工艺处理高硬度地下水探讨

针对北方某地下水暂时性硬度较高的问题,通过小试和中试,考察研究石灰-超滤组合工艺处理高硬度地下水技术的可行性和运行的稳定性.研究表明,原水中投加Ca(OH)2可以通过沉淀法去除水中的暂时性硬度,再采用超滤过滤可以达到较好的固液分离效果,中试出水浊度低于0.2 NTU,硬度低于380 mg/L;中试系统的连续运行表明石灰-超滤组合工艺具有运行稳定、能耗低和易于实施的优点.     

绥滨地下水处理工艺简介

绥滨县位于黑龙江省东北部,黑龙江、松花江两江汇合的三角洲地带,大气降雨和地表水补给,形成了丰富、均衡的地下水资源,但水质较差,部分指标严重超标,必须进行地下水处理。 一、原水水质及处理工艺选择 从绥滨县地下水水质分析结果可以看出,超标物质主要是水中铁、锰离子。 根据生产实践经验,一般采用如下接触氧化法的除铁、除锰水处理工艺。     

农村饮用水净化模式的选择

由于我国农村水源状况不同、供水设施规模不同、水质条件不同,因此采用的净水模式也不相同.粗滤和慢滤两种工艺组合对农村小型水厂建设具有推广价值,原水经过处理、消毒后可作为饮用水.起混凝作用的药剂分凝聚剂、絮凝剂和助凝剂,混凝剂的制备和投配要求十分严格,原水要与药剂充分融合.消毒是净水工艺中重要环节,凡生活饮用水必须进行消毒,消毒剂也应根据原水水质状况的不同,投放量和方法也不相同.     

洗浴废水处理工艺中混凝预处理的作用与效果研究

采用混凝沉淀—过滤—固定化生物活性炭—膜滤—UV 消毒工艺处理洗浴废水,整体试验结果比较理想,在物化处理过程中混凝环节至关重要。为此研究了混凝对浊度、LAS、COD_(Cr)、洗浴浴香的处理效果。研究结果表明：当投药量大于25mg/L 时,混凝沉淀可以把平均浊度为65NTU的原水降低到15NTU 以下,对 LAS、COD_(Cr)的去除率可达62%和50%以上,因此混凝是去除洗浴废水中悬浮物质、LAS 和有机污染物有效的物化处理单元;但是混凝不能有效地去除洗浴废水中的浴香。     

混凝沉淀-气浮过滤工艺生产性试验研究

本文介绍了混凝沉淀气浮过滤工艺及生产性试验。试验结果表明，与传统的混凝沉淀过滤工艺相比，该工艺具有过滤周期长、出水水质好、除藻率高、费用低等特点，适于处理受污染的原水     

某水厂Fe/Mn/氨氮协同去除及处理效果分析

西北某水厂以地下水为原水,部分原水井中铁、锰普遍超标,浊度、色度、CODMn、氨氮季节性超标,本工程采用曝气、反应、接触氧化及生物活性炭过滤工艺,对原水中铁、锰、氨氮、色度、嗅味和CODMn进行分级协同去除,达到了良好的处理效果,出水水质优于生活饮用水卫生标准。     

实现低出水浊度常规处理工艺探讨

浊度是自来水厂的重要水质指标之一,降低浊度能大幅减少致病菌和"两虫"的危害,出水浊度≤0.1 NTU已成为各国水厂努力追求的控制目标.通过对国内外工程案例的总结,从精细化设计原水水质、加药及混凝沉淀、滤料粒径与级配和滤速等因素以及优化运行管理水平等方面进行了探讨.每个处理阶段和处理单元应尽量优化配置,最大限度地提高净化水质,采用常规水处理工艺能稳定达到出水浊度小于0.1 NTU的目标.     

徐州市两例河道来水水质净化工程工艺选择

目前城市黑臭水体整治已经成为我国各级地方政府改善城市人居环境工作的重要内容。徐州市于2013年提出"水更清"行动计划,规划建设水质净化D工程和N工程两座净水厂,对河道上游来水进行处理,从而优化河湖水质。针对原水水质和出水水质的差异,D净水厂采用以"预氧化+强化混凝沉淀"为核心的净水工艺,N净水厂采用以"预氧化+气浮生物过滤"为核心的净水工艺,介绍了两个案例的工艺选择及实施。     

A case study of dissolved air flotation for seasonal high turbidity water in Korea.

A DAF (Dissolved-Air-Flotation) process has been designed considering raw water quality characteristics in Korea. Although direct filtration is usually operated, DAF is operated when freshwater algae blooms occur or raw water turbidity becomes high. Pre-sedimentation is operated in case when the raw water turbidity is very high due to rainstorms. A main feature of this plant is that the operation mode can be changed (controlled) based on the characteristics of the raw water to optimize the effluent quality and the operation costs. Treatment capacity (surface loading rate) and efficiency of DAF was found to be better than the conventional sedimentation process. Moreover, low-density particles (algae and alum flocs) are easily separated while the removal of them by sedimentation is more difficult. One of the main concerns for DAF operation is a high raw water turbidity. DAF is not adequate for raw water, which is more turbid than 100 NTU. In order to avoid this problem, pre-sedimentation basins are installed in the DAF plant to decrease the turbidity of the DAF inflow. For simulation of the actual operation, bench and full-scale tests were performed for highly turbid water conditions. Consequently, it is suggested that pre-sedimentation with optimum coagulation prior to DAF is the appropriate treatment scheme.     

九龙江流域水厂生产废水回用条件的初步研究

以九龙江原水为研究对象,从改善低浊水混凝条件优化净水工艺角度,对生产废水的回用条件和作用规律进行了研究。研究认为:回用具有适当含固率的生产废水可以改善水处理过程的混凝条件,节省投药量,节药率一般为10%～40%;存在改善混凝条件、节省投药量的最佳含固率和最佳混合水浊度范围,最佳含固率为0.1%～0.7%,最佳混合水浊度为60～400NTU;原水浊度是显著影响最佳含固率的因素。当原水浊度小于60NTU时,最佳含固率随原水浊度的升高而增加,当原水浊度大于60NTU时.最佳含固率随原水浊度的升高而降低,最佳混合水浊度表现出相同的规律;在生产过程中,建议以最佳混合水浊度控制生产废水的回用。     

Particle and microorganism removal in floating plastic media coupled with microfiltration membrane for surface water treatment.

Floating plastic media followed by hollow fiber microfiltration membrane was applied for surface water treatment. The performance of the system in terms of particle and microorganisms was investigated. The floating filter was examined at different filtration rates of 5, 10 and 15 m3/m2 x h. Treated water was then fed into a microfiltration unit where different filtration rates were examined at 0.6, 1.0 and 1.4 m3/m2 x d. It was found that polyaluminum chloride was the best coagulant for the removal of particle, algae and coliform bacteria. Average turbidity in treated water from the floating plastic media filter was 3.3, 12.2 and 15.5 NTU for raw water of 80 NTU and 12.9, 11.7 and 31.2 NTU for raw water of 160 NTU after 6 hours at the filtration rates of 5, 10 and 15 m3/m2 x h, respectively. The microfiltration unit could further reduce the turbidity to 0.2-0.5 NTU with low transmembrane pressure development of 0.3-3.7 kPa. Microfiltration membrane could retain most of algae and coliform bacteria remaining in the effluent from the pretreatment unit. It was found that at higher turbidity, algae and coliform bacteria removal efficiencies were achieved at lower filtration rate of the system of 5 m3/m2 x h whereas a higher filtration rate of 15 m3/m2 x h yielded better coliphage removal.     

高浊水处理投药方式的选择

在常规处理条件下,对西南岷江地区突发性非多砂高浊水进行了原水特性的分析及絮凝优化试验。结果表明,采用单级絮凝、分级沉淀工艺,先投加PAC,60~120s后投加PAM,对高浊度原水有良好的去除效果。原水浊度为15000NTU时,投加200mg/LPAC、0.4~0.5mg/LPAM,静沉30min后,出水浊度为1.73~2.48NTU。     

高浊水处理投药方式的选择

摘要：在常规处理条件下,对西南岷江地区突发性非多砂高浊水进行了原水特性的分析及絮凝优化试验。结果表明,采用单级絮凝、分级沉淀工艺,先投加PAc,60～120s后投加PAM,对高浊度原水有良好的去除效果。原水浊度为15000NTU时,投加200m∥LPAC、0．4-0．5mg／LPAM,静沉30min后,出水浊度为1．73-2．48NTU。     

臭氧与活性炭深度处理微污染原水试验研究

采用"预臭氧氧化 常规处理 GAC/O3-BAC深度处理"工艺针对南方某市微污染原水进行中试研究.结果表明:预臭氧能明显提高浊度、有机物和THMFP的去除效果,在此条件下常规出水浊度平均值＜O.1 NTU,与无预处理相比,CODMn去除率提高17.52%,氯消毒后CHCl3浓度降低86.4%;O3-BAC工艺对有机物、CHCl3的去除效果和吸附寿命均优于GAC工艺,但生物膜的脱落会影响浊度的去除效果;随着炭床厚度增加,GAC滤池中,CODMn呈线性降低,而BAC滤池中,上部500～1 000 mm厚度内,CODMn快速降低并稳定在一定的水平上.     

生物预处理技术在嘉兴地区给水厂的应用比较

对嘉兴地区主要给水厂近年来应用立体弹性填料、LT型悬浮球填料、YS型悬浮填料、卵石填料等的生物预处理工艺从填料及配套设施、工艺运行参数、运行效果、成本等方面进行了比较.认为弹性填料生物预处理更适用于低浊(50 NTU以下)、低氨氮(1.5 mg/L以下)原水,LT型悬浮球填料生物预处理适用于低中浊(100 NTU以下)、低中氨氮(2.5 mg/L以下)原水,YS型悬浮填料生物预处理及"SAF"滤池对低浊、中高氨氮(2.5 mg/L以上)原水有较好的适应性.最后探讨了弹性填料存在的短流、积泥,悬浮填料存在的部分填料流化不均匀,富氧的生物工艺单元内水生动物泛滥等问题.     

UV disinfection of wastewater effluents for unrestricted irrigation.

Wastewater reuse in arid regions is important for the production of a water resource to be utilised for non-potable purposes and to prevent the environmental transmission of disease-causing agents. This study was conducted to evaluate the effect of water quality on the comparative disinfection efficiency of viruses, bacteria and spores by UV irradiation. Furthermore, the microbial quality of effluent produced by coagulation, high rate filtration (HRF) and either UV irradiation or chlorination was determined. Using low pressure collimated beam, a UV dose of 80 mWs/cm2 was needed to achieve a 3-log10 inactivation of either rotavirus SA-11 or coliphage MS2, whereas over 5-log10 inactivation of E. coli was reached with a dose of only 20 mWs/cm2. B. subtilis inactivation was found to be linear up to a dose of 40 mWs/cm2 and then a tailing up to a UV dose of 120 mWs/cm2 was observed. It is worth noting that effluent turbidity of < 5 NTU did not influence the inactivation efficiency of UV irradiation. Operation of a pilot plant to treat secondary effluent by coagulation, HRF and UV disinfection at a UV dose of 80 mWs/cm2 resulted in the production of high quality effluent in compliance with the Israel standards for unrestricted irrigation (< 10 CFU/100 mL faecal coliform and turbidity of < 5 NTU). Sulphite reducing clostridia (SRC) were found to be more resistant than coliphages and F coliform for UV irradiation. The results of this study indicated that UV disinfection is suitable for the production of effluents for unrestricted irrigation of food crops.     

接触过滤-活性炭吸附-超滤一体化净水装置处理长江原水的研究

试验采用接触过滤-活性炭吸附-超滤工艺处理长江原水.结果表明,接触过滤能有效地去除较大悬浮物,活性炭能吸附水中大量有机物,有效防止膜污染.并且用0.4%的HCl和0.4%的NaOH对膜进行化学清洗,能使膜的过滤性能得到很好的恢复.当原水平均浊度为114.8 NTU、氨氮为0.35 mg/L、TOC为2.47 mg/L、CODMn为2.7 mg/L、细菌数为700 CFU/mL时,工艺出水浊度为0.07 NTU、氨氮为0.09 mg/L、TOC为0.3 mg/L、CODMn为0.88 mg/L、细菌总数为0.