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自来水厂排泥水处理技术的若干问题 总被引:17,自引:1,他引:16
探讨了自来水厂排泥水处理技术的若干问题,诸如正确确定自来水厂的污泥干固体产量的方法,减少自来水厂沉淀池的排泥水水量的措施,设置污泥调蓄均衡池的必要性等,指出自来水厂的排泥水处理工作应从对具体水厂的排泥水水质特性分析出发,注意自来水厂污泥和污水厂污泥之间的本质差别。 相似文献
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福州市东区水厂通过污泥机械脱水实验,提出排泥水处理和机械脱水系统的自动化控制的运行方法,在确定合理的处理工艺设计出高度的自动化模式,使系统在PLC中央控制下实现自动运行。PLC的使用使系统设备运行更加稳定、合理。东区水厂提出的自动控制设计为实现自动化程度高、工作人员维护量少、污泥处理过程中水体排放安全的污泥处理工艺提供了技术支撑。 相似文献
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本文主要通过对自来水厂排污泥处理系统工艺设备的配置选择及其问题,分别做出自来水厂的排污泥处理系统设计,从而对水厂的工艺流程、运行状况、各阶段排泥水的性状进行详细分析,从而实施最符合工艺流程的设备及配置. 相似文献
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介绍了丹麦Lundtofle 污水处理厂的机械设备、污水处理工艺(活性污泥法)、污泥处理(厌氧、消化、焚烧)的操作和运行情况,并给出了详细的运行费用方面的数据,包括药剂费、能耗等. 相似文献
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William Pablo Freese Barber 《Water and Environment Journal》2014,28(1):1-10
The challenge of stricter wastewater standards is resulting in configuration changes to wastewater treatment. As facilities upgrade, the type of sludge produced is changing, with growing quantities of secondary and chemical sludge at the expense of primary sludge. It is already understood that secondary sludge is harder to treat than its primary equivalent; therefore, increasing the quantity of this type of sludge will have detrimental impacts downstream. As legislation tightens further, extended aeration times may be required during processing to remove more nutrients. Work has shown that extended aeration further exacerbates the treatability of secondary sludge. This paper explains how tightening wastewater legislation fundamentally alters the nature of the sludge produced, and how these alterations impact further processing, especially with respect to sludge production and type; sludge energy content; performance of anaerobic digestion and dewatering, and potential for thermal energy recovery. 相似文献
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Effects of soluble and particulate substrate on the carbon and energy footprint of wastewater treatment processes 总被引:1,自引:0,他引:1
Most wastewater treatment plants monitor routinely carbonaceous and nitrogenous load parameters in influent and effluent streams, and often in the intermediate steps. COD fractionation discriminates the selective removal of VSS components in different operations, allowing accurate quantification of the energy requirements and mass flows for secondary treatment, sludge digestion, and sedimentation. We analysed the different effects of COD fractions on carbon and energy footprint in a wastewater treatment plant with activated sludge in nutrient removal mode and anaerobic digestion of the sludge with biogas energy recovery. After presenting a simple rational procedure for COD and solids fractions quantification, we use our carbon and energy footprint models to quantify the effects of varying fractions on carbon equivalent flows, process energy demand and recovery. A full-scale real process was modelled with this procedure and the results are reported in terms of energy and carbon footprint. For a given process, the increase of the ratio sCOD/COD increases the energy demand on the aeration reactors, the associated CO2 direct emission from respiration, and the indirect emission for power generation. Even though it appears as if enhanced primary sedimentation is a carbon and energy footprint mitigation practice, care must be used since the nutrient removal process downstream may suffer from an excessive bCOD removal and an increased mean cell retention time for nutrient removal may be required. 相似文献
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Qingyang Guo Feng Qi Ruimin Mu Gejiang Yu Guixia Ma Qianya Meng 《Water and Environment Journal》2023,37(2):192-205
Because of the low energy consumption of aeration, strong nutrient removal capacity, low greenhouse gas emissions and high resource recovery potential, the wastewater treatment process using microalgal–bacterial consortia is considered as an excellent alternative to the traditional activated sludge wastewater treatment process. In this review, the wastewater treatment process based on microalgal–bacterial consortia and its greenhouse gas emission reduction mechanism are introduced. The potential advantages and constraints of the process in carbon neutral wastewater treatment were highlighted and critically discussed. The environmental impact of wastewater treatment, the research progress of environment-friendly treatment technologies and the challenges faced by integrating these technologies are discussed. However, the wastewater treatment process based on microalgae–bacteria consortia still needs to be studied. In the future, it is necessary to optimize the scheme for quantifying the environmental impact of wastewater treatment and further expand the recycling rate and cost value of wastewater resources. 相似文献
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污水处理是一个高能耗、低能效的复杂过程。改变传统认知,将污染物当作能量物质加以资源化,回用于水处理过程或者产品化,可改变污水处理的能耗。以城市污水与焦化废水为例,分析了水质中污染物具有的内含能形式,并探讨了两种计算方法,指出内含能利用的两类可能途径和最大限度。基于热力学基本定律与污水水质特征,辅以适当的当量假设,分析了污水处理过程中的不同形式能量消耗及其原因,运用能流图表达了两个具体案例的能量转化与分布规律。比较了污水处理两类节能评价方法的优异性,提出了未来水处理可能的节能新途径。在加深污水内含能认识的基础上,结合相关产业与工艺技术,分离回收有价值成分,如营养物(氮、磷)、重金属等,并获得水资源的再利用,以间接补偿处理过程的能耗,从而实现节能目标。 相似文献
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与水质达标相比,污水处理的经济成本问题易被忽视.建立成本统计台账,对电耗、药耗、污泥处理费、维修费等项目进行统计,测算生产成本,并依此查找漏损,节能降耗,才能做到精细化、成本化管理污水厂. 相似文献
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多功能微生物制剂用于污泥减量的研究 总被引:2,自引:3,他引:2
目前如何减少剩余污泥的产量已成为污水处理的研究热点。为此,基于目前主要的污泥减量理论,在自然界中分离、筛选出一些特殊的微生物菌种,在特定培养工艺下研制一种多功能微生物制剂(MCMP)用于污泥的减量。采用该微生物制剂在重庆长寿污水处理厂进行中试:设3套相同装置,均采用常规活性污泥法且运行操作相同,其中两套装置分别投加所处理水量0.005%和0.01%的微生物制剂,一套不投加,对比其污泥减量效果。试验结果表明:投加MCMP的两套装置的污泥减量比例分别为81.76%和89.18%,3套装置的污泥增长速率分别为2.0%、1.5%和11.5%;投加MCMP能提高出水水质,3套装置出水的COD、NH3-N平均浓度分别为35.08、33.89、36.51mg/L和1.40、1.22、1.62mg/L。投加MCMP不用增设专用的处理单元,也不需改变原有的处理设施及运行方式。3套装置的曝气量相同,因而投加MCMP不会增加整个系统的动力消耗。该制剂具有良好的污泥减量效果,能减轻污水处理厂污泥处理、处置的负担。 相似文献
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在新型冠状病毒感染的肺炎疫情期间,消毒液(次氯酸盐)的使用量大幅提升,导致排水中的消毒液含量增加。消毒液虽然在调节池和管网输送过程中会被还原,但依然存在污水厂进水次氯酸盐增加的风险,可能会对活性污泥系统造成一定程度的冲击。因此,如何判断污水处理厂是否受到冲击以及如何应对这种潜在风险成为广泛关注的问题。整理了课题组关于次氯酸钠对活性污泥微生物活性影响的相关研究成果,旨在为疫情期间污水处理厂的安全运营提供一些建议及应对措施。特别需要指出,当进水氯负荷超过4 mg/(gSS·d)或污泥恢复指数RI长期维持在较高水平时(如超过16%),表明系统受到了冲击,面临较大的事故风险,污水厂需采取措施消除进厂水中高浓度余氯对系统的影响。 相似文献