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我国市政污水处理厂脱水污泥的主要处置方式为填埋,垃圾填埋场接受市政脱水污泥时,会设置污泥暂存坑存放市政污泥.白龙港污水处理厂污泥暂存场中长期存有污泥,大量雨水渗入致使污泥填埋的稳定性大幅降低.取出稳定化的污泥进行脱水,可进一步减量污泥,又可腾出大量污泥填埋空间.对暂存库区污泥进行脱水时,会产生大量的高氨氮压滤液.为消除污泥储坑中污泥及其产生渗滤液对周围环境的危害,需同步处理污泥和渗滤液,以消除污泥储坑对周围环境产生的危害.文中对白龙港污泥暂存场中所产生的污泥压滤液进行试验处理,经混凝沉淀、吹脱和氧化工艺处理后,出水水质可达到下水道纳管标准.通过开展填埋污泥暂存库区污泥处置成套技术研究与示范,为白龙港污泥暂存库区污泥消纳处理提供技术支撑. 相似文献
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1污泥的介绍污泥的种类很多,主要包括工业企业产生的污泥,如电镀污泥、印染污泥等;河道污泥,自来水厂污泥,污水厂污泥等。其中污水厂污泥(也称市政污泥)是随着城市污水处理量的增长而长期、稳定、大量产生的污泥,因其独特的理化性质,如得不到妥善的处理处置,对环境的危害是非常严重的。本文主要针对污水厂污泥的处理处置进行简要论述。 相似文献
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<正>污泥是由水或污水处理过程中产生的固体沉淀物质,包括污水处理厂和自来水厂的市政污泥,各种工业生产所产生的固体与水、油、化学污染物和有机质等混合物的工业污泥,排水收集系统的管网污泥,江河和湖泊的淤泥等。由于工业污泥大多属于危险废物,需要特许经营,而管网污泥和江河淤泥属于天然沉积物,可直接用于农业生产,而随着市政污泥对生态和环境的影响愈发突出,污泥处理处置问题已成为社会各界关注的议题之一。本文对水泥窑协同处置污 相似文献
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城市污水处理厂的污泥处置方案评价 总被引:6,自引:0,他引:6
城市污水处理厂的污泥是污水所产生的固态、半固态及液态废弃物。若处理、处置不当,会明显地影响污水处理厂的正常运行,同时又对环境造成严重污染。若有效地利用污泥中的营养成分及所含的生物能源,化害为利,将成为最好的选择。目前国内外较先进及成熟的污泥处理和处置方法有:土地利用、高温堆肥、热干化和焚烧等方法。无论采取何种处置方法,污泥产品都不应对环境造成二次污染。在介绍了几种处置方案后,认为只有在兼顾环境生态、社会和经济效益平衡的前提下,选择适合本地情况的最佳方案。污泥的最终出路是部分或全部资源化利用或以某种形式回到环境中去。 相似文献
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市政污泥是城镇污水处理厂的主要副产物,为有效处置和综合利用污泥,对市政污泥现有填埋、堆肥利用、建材利用、干化焚烧四种处置方式进行对比分析,对污泥干化和焚烧是污泥无害化处置的趋势.这种处置方式可将污泥有机物、有害物彻底分解,同时实现重金属离子的高温烧结固化,具有减容、减量、无害化的特征,燃烧后的残渣可进行综合利用,烟气经... 相似文献
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芬顿铁泥是芬顿氧化技术处理工业有机废水产生的一种工业危险废弃物。芬顿铁泥中含有大量的铁资源,具有很高的资源回收潜力,现已成为国内外的研究热点。从化学法、热能法两个方面综述了目前国内外对芬顿铁泥的各类资源化利用方法,并对各类典型方法的研究进展、优缺点以及核心技术进行了介绍。展望了芬顿铁泥资源化利用未来的发展目标,并基于中国火电厂运行实际情况提出芬顿铁泥资源化利用新途径,即将芬顿铁泥作为原材料制备火电厂铁基选择性催化还原(SCR)脱硝催化剂,以期充分回收利用芬顿铁泥中的铁资源,减小铁泥堆积所造成的环境危害。 相似文献
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Sewage sludge produced in wastewater treatment plants represent a significant portion of waste resulting from human activity and it is important to offer new ways of treatment. Thermal gasification of sludge is a promising thermal treatment, particularly because it can lead to a recovery of energy and a drastic reduction in the initial waste volume. However, it is a subject that has rarely been treated in the literature for sewage sludge. In particular, the nitrogen compounds present in significant quantities in the sewage sludge and their reactions during a thermal gasification step, must necessarily be taken into account. In order to study nitrogen behavior, this paper presents experimental results that are included in a model to predict NH3 emission. 相似文献
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深圳市每天产生的污泥约560 t,原有的运送到下坪固体废弃物填埋场直接填埋的方案存在诸多问题,急需寻找更加科学合理的处置方案。探讨了目前深圳市污泥处理对策,石灰固化法经济可靠,是当前最具可行性的处理对策。污泥经过石灰固化处理后,污泥的含水率降到55%左右,污泥十字板强度达6.07 kPa,无侧限抗压强度达22.42 kPa,基本能满足单独填埋的要求;经过补步核算,按200 t/d的污泥石灰固化处理单元,平均每吨的处理成本为111元。建议在各污水处理厂建设200 t/d的石灰固化处理单元,产生的污泥就地处理达到填埋要求后再运送至下坪填埋场填埋。 相似文献
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采用污泥活性炭处理亚甲基蓝模拟染料废水,研究了模拟废水初始浓度、污泥活性炭投加量、pH值、水浴吸附时间等因素对染料废水的脱色率和COD去除率的影响,探讨污泥活性炭处理染料废水的适宜工艺条件。实验结果表明:随着染料废水初始浓度的增大,脱色率和COD去除率均表现出下降趋势;随着污泥活性炭投加量的增加,脱色率和COD去除率效果均十分明显;随着模拟废水pH值的增大,其脱色率基本呈现增大趋势,而COD去除率则先增大后减小,当pH在7.6~7.8时,脱色率与COD去除率均出现最大值;在延长水浴时间的同时,脱色率和COD去除率均表现出较好的效果。本实验处理染料废水的适宜条件为:染料废水的初始浓度为2.5mg/L,调节染料废水的pH值7~8,加入0.8g污泥活性炭,30℃条件下2h。 相似文献
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超声波-复合絮凝剂对石化厂剩余污泥脱水的研究 总被引:3,自引:0,他引:3
以污泥含水率为考察指标,研究了超声波-复合絮凝剂对石化厂剩余污泥脱水效果的影响.实验结果表明,复合絮凝剂的脱水效果优于单一絮凝剂;污泥采用复合絮凝剂PAM-PAFC进行絮凝脱水,在投加质量浓度190 mg/L、m(PAM)∶m(PAFC)=1∶1条件下,再经20 kHz、400 W/m2超声处理2.5 min后,污泥含水率从97%降至79%,污泥体积缩小86%左右,比仅投加PAM处理时污泥含水率降低5%左右.可见,超声波-复合絮凝剂可以强化污泥脱水,在提高污泥脱水效果的同时,减少了有机絮凝剂PAM的用量,降低了污泥处理成本. 相似文献
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The proliferation of wastewater treatment plants has become essential to ensure the protection of the natural environment. As a consequence, the production of waste by‐products, namely sewage sludge, has increased together with both the unit efficiency levels and with the number of wastewater treatment plants. Since dumping is no longer allowed in the EU, the processes mainly used to treat sewage sludge are agricultural spreading and incineration. However, due to the constant increase in production, it has became essential to find alternative methods of treatment. Considering the chemical composition of sludge, some new thermal processes of treatment have recently been considered by researchers. Thermal gasification is one method that could be of significant interest. Dried sludge composition is sufficiently close to the that of classical biomass (such as wood, rice, etc.) to make sludge treatment in a gasifier feasible. In this paper we discuss how gasification technologies could be transposed to the treatment and valorisation of sludge. Although this process seems attractive, it will also be demonstarted that much experimentation remains to be conducted on a laboratory and pilot scale. 相似文献
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GERALD A. BEST 《Coloration Technology》1974,90(11):389-393
The demand for clean water for industry and for domestic supply is increasing yearly. Many readily accessible supplies are fuh'y exploited and water authorities are now having to consider hitherto-polluted rivers as possible sources for future demand. To meet the demand for clean water and for cleaner rivers which receive the waste from the consumers, a massive amount of expenditure will be required from central and local government and from industry for new water-treatment plants. The legislation covering river pollution and waste-water disposal in Scotland is described, and the particular problem of effluents from the textile industry is discussed. Many workers have demonstrated that waste water from the textile industry can be treated using conventional biological treatment and other techniques and be purified sufficiently to meet the standards imposed by the local authority for discharge into the sewerage system, or by the river purification board for discharge into the rivers or the sea. 相似文献