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对上海市某污水处理厂污泥重金属特性及含量进行分析,为市政污泥可农用性提供初步判断.研究结果表明,该污水处理厂污泥重金属Cu、Zn、Pb、Cd、Cr、Ni含量均值分别为246、591、60.8、1.35、58.6、33.0 mg/kg.主成分分析(PCA)显示,第一主成分(PC1)中重金属Cu、Zn、Pb、Cd、Cr和Ni占主导作用,为污泥主要污染因子,且其值反映重金属的影响力;第二主成分(PC2)反映污泥中有机质与热值.与污泥农用重金属控制标准比较,样品污泥中重金属检测浓度均低于控制浓度限值,表明该污水处理厂污泥具有可农用性潜力. 相似文献
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本文分析了包头市南郊污水处理厂污泥中Cr、Cu、Mn、Pb、Zn 5种重金属的含量及其各形态的含量,并运用地质累积指数法(Igeo)和潜在生态危害法(RI)对污泥在园林绿化使用中潜在生态风险做了综合评价.结果表明:各金属元素含量均未超出我国城镇污水处理厂污泥处置园林绿化用泥质标准中的最高允许含量,重金属元素的形态主要以残渣态和有机结合态为主,在环境中较稳定.Igev和RI评价结果显示,包头市南郊污水处理厂污泥中5种重金属均为低潜在生态风险,所以污泥经过适当处理可以比较安全的用于园林绿化当中. 相似文献
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以江西省某工业园区污水处理厂为例,通过对污水处理厂的原辅材料、污水处理工艺分析,以及对主要纳管企业的原辅材料、产品方案、生产工艺、废水处理的工艺分析,结合污泥和芬顿结晶初筛样品的检测结果,排除了污泥和芬顿结晶的易燃性、反应性、急性毒性的危险特性,确定了污泥及芬顿结晶的腐蚀性、浸出毒性、毒性物质含量的危险特性的鉴别检测。经采样鉴别检测,该工业园区污水处理厂污泥及芬顿结晶的腐蚀性、浸出毒性、毒性物质含量超标份样数均为0,判定该工业园区污水处理厂污泥及芬顿结晶不属于危险废物。同时对工业园区污水处理厂污泥危险特性鉴别工作要点进行了总结,为同类型污泥危险特性的鉴别工作提供参考。 相似文献
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本文主要介绍泉州市中心市区污水处理厂污泥处理、处置现状,以及如何优化选择处置方式,选用适宜污水处理厂污泥焚烧处置的蒸汽间接干化法和循环流化床焚烧工艺,对泉州市中心市区污水处理厂产生的污泥先干化至含水率40%~45%,再进入焚烧炉与生活垃圾进行掺烧处置. 相似文献
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Maria Wlodarczyk-Makula 《Polycyclic Aromatic Compounds》2013,33(2):183-194
Abstract Sewage and sewage sludge from a municipal wastewater treatment plant were analyzed for 16 EPA-PAHs. This plant is a classic mechanical-biological treatment plant, consisting of activated sludge technology with additional chemical treatment for the removal of phosphorus compounds. The process of sewage sludge treatment is carried out in closed as well as open sludge digesters. Primary and mechanically thickened sludge are passed through the fermentation process. Digested sludge is dewatered on filter-press through addition of flocculent. The measurements were obtained to investigate the effect of different treatment stages on PAH content in wastewater and sewage sludge. The following wastewater samples were collected: crude ones and those after sand trap, primary sedimentation, biological treatment and secondary sedimentation. Sewage sludge samples were collected from: primary sludge, digested sludge and dewatered sludge. PAH load in influent, mechanically and biologically treated sewage, as well as in raw digested and dewatered sludge, were calculated. PAHs were extracted from wastewater and sludge samples, with cyclohexane, dichloromethane using an ultrasonic method. Gas chromatograph equipped with mass spectrometry was used for qualitative and quantitative determination of PAHs. Mechanical and biological treatment proved the removal of 83–85% of PAHs from the influent. Despite this its daily PAH load introduced into the environment was high and reached 27–37% of PAH load in influent. In sewage sludge it was 46–70 g/d of PAHs (carcinogenic PAHs content 4–12%). In waste sludge (filter pressed sludge and sand from detrirer) PAH total load reached 42–68 g/d with (10–17% of carcinogenic PAHs). 相似文献
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《分离科学与技术》2012,47(6):920-932
In this work an ultrafiltration (UF) membrane system was investigated for the treatment of textile wastewater. UF membranes were assisted by activated sludge and minerals, which were employed as sorbents, to remove Cu(II), Pb(II), Zn(II), Ni(II), color, and organics. Significant variations were observed in metal removal efficiencies among the textile wastewater samples of different origin, even at the same pH (= 6) due to the presence of different compounds in wastewater. At the examined pH range (5.63–9.21), the dominant mechanism for copper and lead removal was the formation of insoluble metals due to precipitation and complexation of metal ions with wastewater compounds, including adsorption of metals on suspended solids and colloidal matter. The adsorption process of metals on minerals and activated sludge was the dominant process for nickel and zinc removal at low pH, while precipitation/complexation prevailed at higher pH. The examined adsorption-UF system could produce a treated effluent having low metal concentrations that could be safely discharged into municipal sewers. COD removal ranged from 76%–92% for the five textile wastewater samples. The color removal accomplished was significant (45%–70%), and depended on the type of dye. 相似文献
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通过研究不锈钢酸洗废水体系中氟离子脱除和金属离子沉淀的规律,开发了钙钠协同沉淀新工艺,并对新工艺产生的污泥于1200℃下进行还原,细磨、磁选后得铁、铬、镍合金粉末和再生萤石矿。结果表明,该工艺实现了废水的达标排放,污泥产生量减少了14.79%,实现了铁铬镍的金属化还原,得到了再生萤石矿和金属品位93.62%的合金粉末,合金粉末中铁、铬、镍品位分别达69.31%, 7.60%和16.71%,回收率分别高达95.30%, 88.70%和97.53%。 相似文献
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出于快速、准确和经济角度,采用电感耦合等离子体原子发射光谱法(ICP-OES法)测定塑料类输液容器中金属元素和金属离子含量。按照《国家药包材标准》(2015版)的方法得到待测液后,利用ICP-OES测定金属元素和金属离子的含量,并对测定方法进行了方法学考察。通过与《国家药包材标准》规定的原子吸收法进行比较,筛选出最佳的检测方案。结果表明,ICP?OES法中,铅、镉、铜、铝、钡、锡、铬的谱线选择分别为220.353、214.438、324.754、167.079、445.403、189.989、283.563 nm;检出限分别为2.09、0.05、0.67、0.60、0.32、0.88、0.90 ng/mL;精密度(20 ng/mL)分别为2.53 %、0.12 %、0.96 %、0.42 % 、0.33 %、1.22 %、1.55 %;金属元素的加标回收率分别为80.71 %~113.95 %,金属离子的加标回收率分别为72.30%~129.36%;ICP?OES法能够快速、准确地测定塑料类输液容器中金属元素和金属离子的含量。 相似文献
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近年来,水资源短缺以及水体污染问题日益严峻。传统的活性污泥生物水处理技术由于产生大量剩余污泥,在某种程度上限制和影响了该方法在废水处理中的应用。由微生物自凝聚形成的特殊生物膜——好氧颗粒污泥由于具有污泥颗粒结构紧凑致密、沉降性能好、生物量较高,同时具备多种微生物功能、剩余污泥量较少等优势,而备受关注。本文重点论述了好氧颗粒污泥的结构特征、表观气速与溶氧水平,有机负荷、金属离子、代谢方式等外部环境因子对污泥颗粒快速培养和形成过程的影响,微生物菌群结构与颗粒形成机制、以及影响颗粒长期运行过程中稳定性缺失的主要原因,提高好氧颗粒污泥的稳定性的常用措施,以提高人们对好氧颗粒污泥的认识,推动好氧颗粒污泥技术在废水领域中的应用。 相似文献
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