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<正> 在城市污水处理系统中,如何对沉淀污泥和剩余活性污泥进行适宜的处理,是一长期未解决的问题。目前在城市污水处理厂中,大多用如下方法对污泥进行处理。将沉淀污泥和剩余活性污泥排入浓缩池中,在重力作用下进行浓缩,再向浓缩污泥中加入混凝剂或高分子絮凝剂,以改善污泥的脱水性能,然后,用压滤机、真空过滤机、造粒脱水机、离心脱水机等脱水机械对加药污泥进行脱水处理。 相似文献
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辽宁省阜新市某污水处理厂原污泥处理系统采用带式脱水机机械脱水,脱水后污泥含水率为80%左右,无法满足《城镇污水处理厂污泥处置混合填埋用泥质》(GB/T 23485—2009)的要求。为使污泥含水率达标需对原有污泥处理系统进行提标改造,改造工程中采用重力浓缩/化学调理/高压隔膜压滤机进行污泥深度处理。经调试运行,脱水后污泥含水率可达到60%以下的设计要求。该文对工程设计及运行过程进行了详细介绍,可为同类工程设计提供经验参考。 相似文献
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污泥处理被称为废水处理的两大支柱之一。长期以来,水处理工作者致力于废水的治理,但对水处理后作为污染物质的浓缩物──污泥的处理没有作出相应的努力。笔者认为,废水处理系统应具备污泥处理设施才算完善。基于这一点,本文运用国内外污泥处理技术的新理论和实践,对新型生物膜法废水处理中的污泥浓缩、污泥调质、污泥的机械脱水等问题进行了系统的研究。 相似文献
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为了确定伊拉克某油田污水处理站含油污泥处理设备,对比分析了板框式压滤机、带式压滤机、离心式脱水机和叠螺式脱水机等常用含油污泥机械脱水设备的技术特点和应用范围,并对叠螺式脱水机实际运行情况进行了现场调研。分析和现场调研结果表明,叠螺式脱水机集污泥浓缩和脱水于一体,具有出泥含水率低、占地面积小、易分离、不堵塞,可以实现自清洗,可用于低浓度污泥等特点,叠螺式脱水机简化了油田污泥处理工艺流程,降低了地面工程建设投资及运行成本,是含油污泥进行脱水的较好选择。介绍了伊拉克某油田污水处理站含油污泥叠螺式脱水机的选型设计。 相似文献
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《煤炭转化》2014,(3)
采用污泥重力浓缩脱水的实验方法探讨了煤粉对污泥调质与浓缩脱水的影响.结果表明,用煤粉对污泥进行调质,能够改善污泥的浓缩脱水性能和沉降性能,当100g污泥中加入10g煤粉时,浓缩污泥的含水率由煤粉调质前的91.13%降至调质后的76.35%,污泥的平均沉降速率由煤粉调质前的1.30mL/min提高至调质后的1.73mL/min;不同粒度的煤粉对污泥调质与浓缩脱水性能存在差异,最适宜污泥调质的煤粉粒径为0.076mm~0.25mm;随着煤粉投量的增加,污泥浓缩脱水性能及污泥机械脱水性能得到较大改善.用煤粉对污泥进行调质,能使浓缩污泥的含水率小于80%,为浓缩污泥与煤混合配制污泥水煤浆提供了条件,对污泥的资源化利用有重要的理论和实际意义. 相似文献
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南昌市红角洲水厂排泥水处理工艺包括调节、浓缩、平衡、脱水和回用水五大系统。浓缩采用辐流式重力浓缩池,能耗低、运行维护方便、处理效果稳定。平衡池用于接纳浓缩污泥,使浓缩污泥含固率保持相对稳定,从而提高后续污泥机械脱水效率。此外,平衡池兼作污泥调质池,在此投加调质药剂PAM,改善污泥的脱水性能。脱水采用离心脱水机,占地面积小、投资较低、运行管理简单。红角洲水厂一期工程已运行,排泥水处理效果稳定,污泥处理量为3.5~4 t干固体/d,处理后的泥饼含水率为75%~80%。水厂将生产过程中的排水进行回收利用,有效地降低了厂区自用水量,节约用水,且减少了水厂外排水。 相似文献
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污泥处理被称为废水处理的两大支柱之一,长期以来,水处理工作者致力于废水的治理,但对水处理后作为污染物质的浓缩物-污泥的处理没有作出相应的努力。笔者认为,废水处理系统应具备污泥处理设施才算完善,基于这一点,本文运用国内外污泥处理技术的新理论和实践,对新型生物膜法废水处理中的污泥浓缩,污泥调质,污泥的机械脱水等问题进行了系统的研究。 相似文献
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Jung Eun Lee 《Drying Technology》2014,32(2):156-166
Real-scale thermal filter press dewatering equipment (plate size: 630 mm × 630 mm) was installed and operated at a waterworks for one year in an attempt to achieve sludge reduction. During the period, the dewaterability was evaluated according to the seasonal sludge properties in order to compare the dewaterability of thermal dewatering and mechanical dewatering, as well as to determine the economics of thermal dewatering. According to the results, the winter season sludge showed a 36% decrease in water content and a two-thirds reduction in dewatering velocity compared to the summertime sludge. In addition, the dewatered cakes of the thermal filter press dewatering equipment showed a lower specific cake resistance and water content in the dewatered cakes than the mechanical filter press dewatering equipment, indicating superior dewaterability. This was attributed to the easier removal of the filtrate remaining in the capillary tubes due to thermal dewatering. The energy consumption for thermal dewatering was 300 kJ/dry solids (DS) kg. A comparison of the sludge dryers indicated that it is possible to produce dewatered cakes that consume less energy and can be recycled. According to the performance evaluation results, the real-scale thermal filter press dewatering equipment had high adaptability to the changes in seasonal sludge, showing excellent dewaterability compared to the mechanical filter press dewatering equipment, and was economical due to the lower energy consumption. 相似文献
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采用先进的离心脱水工艺技术处理炼油厂的含油污泥和非含油污泥,通过对污泥脱水装置的技术改造,经过3年连续生产的检验,运行稳定,操作方便,自动化程度高,各项指标均达到了设计值,从而解决了污泥对环境污染问题。 相似文献
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污泥脱水是减小污泥体积的关键工艺技术,而枵泥脱水设备的选型对污泥脱水效率的高低和脱水工艺的正常运行最为重要。文章以广州某水厂为例,在介绍常见污泥脱水设备的基础上,选择了合适的污泥脱水设备,在污泥脱水工艺流程中发挥了稳定的脱水效果,该厂的污泥脱水问题也得到了有效的解决。 相似文献
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一种新型污泥脱水设备-滚压式污泥脱水机 总被引:2,自引:1,他引:1
滚压式污泥脱水机是一种新型的用于污泥脱水的过滤机械,它脱水率高,固相保留率高,连续工作时间长,并且全过程封闭。重点介绍了这种脱水机的结构,通过与现有的几种比较流行的污泥脱水过滤机的比较,说明其具有良好的污泥脱水功能。 相似文献
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Dewatering of Sewage Sludge 总被引:1,自引:0,他引:1
John T. Novak 《Drying Technology》2006,24(10):1257-1262
Dewatering of sewage sludges is usually carried out using belt filter presses or centrifuges. The ability to remove water from sludges by mechanical dewatering is a property of both the sludge and the equipment used for dewatering. Newer high-solids centrifuges can remove more water than a belt press but require a higher chemical conditioning dose. The Gt value, the product of the mean velocity gradient and the shear time, has been found to be a useful parameter for characterizing the shear in mechanical dewatering equipment. Dewatering can be considered a two-step process, filtration followed by expression. The expression step is the most important of these and the benefits of various sludge processing techniques and conditioning chemical types remains a fruitful area of research. 相似文献
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John T. Novak 《Drying Technology》2013,31(10):1257-1262
Dewatering of sewage sludges is usually carried out using belt filter presses or centrifuges. The ability to remove water from sludges by mechanical dewatering is a property of both the sludge and the equipment used for dewatering. Newer high-solids centrifuges can remove more water than a belt press but require a higher chemical conditioning dose. The Gt value, the product of the mean velocity gradient and the shear time, has been found to be a useful parameter for characterizing the shear in mechanical dewatering equipment. Dewatering can be considered a two-step process, filtration followed by expression. The expression step is the most important of these and the benefits of various sludge processing techniques and conditioning chemical types remains a fruitful area of research. 相似文献