基于污水处理系统重金属废水处理工艺分析

本文阐述了污水处理系统重金属废水处理操作方法,并对重金属废水处理工艺和系统的分析。     

生活污水处理厂生物膜技术工艺分析

对生物转盘、生物接触氧化两种生物膜法的污水处理方案进行了分析,分别指出了各种方案的优缺点及应用建议,并通过黑龙江科技大学工程实例,证明了在生物接触氧化池内增加溶解氧变频探头,可降低生物接触氧化法污水处理系统的能耗,提高污水处理效率。     

污水处理过程中的重金属变化规律研究

通过对采用活性污泥法的污水处理厂各个工艺环节中重金属变化情况的研究,分析了污水处理过程对重金属的消减原理以及去除规律、影响因素,最终得出了一些有意义的结论。     

生物氧化法在火电厂污水处理中的运用

随着环境保护标准的不断提高对污水处理的工艺提出了更高的要求。文章以长沙电厂污水处理系统工程为例介绍了二段式生物氧化法的施工工艺。证实生物氧化法污水处理技术是一种经济适用,环保健康的污水处理系统。     

生物转盘组合工艺用于南方某乡镇污水处理

以南方地区A县乡镇污水处理工程项目为例,具体分析了生物转盘组合工艺在乡镇污水处理中的应用情况,同时对乡镇污水处理工程的建设运营模式进行了探讨。结果表明,生物转盘组合工艺基本上可以满足乡镇污水处理要求;采用一体化建设模式的生物转盘组合工艺便于降低成本和形成规模效应,为我国乡镇污水处理提供了一种新的思路。     

重金属迁移转化规律研究

通过对阜阳污水处理厂的进水、曝气沉砂池、出水分析检测,研究CASS工艺对城市污水中重金属的去除效果,得出了重金属的迁移转化规律,为进一步提高CASS工艺的污水处理效果提供了科学依据。     

生物絮凝吸附组合工艺在污水处理中的应用

结合中小城镇污水的特点,提出了小城镇污水处理工艺的发展方向,探讨了生物絮凝吸附组合工艺在小城镇生活污水处理中的应用,对具体的工艺流程进行了介绍,指出生物絮凝吸附组合工艺是适用于中小城镇生活污水处理的新型工艺。     

污水处理微生物检测中分子生物学技术的应用

和传统的生物污水处理法相比,分子生物学污水处理技术可以更加充分地揭示污水内部的生物反应信息,分子生物学技术能更好地对污水中的生物进行控制处理,因此,具有更为广阔的应用空间。基于此,本文详尽地分析并介绍了分子生物学技术在污水处理微生物检测中的应用。     

膜生物反应技术在环境工程污水处理中的相关分析

环境工程在不断更新和发展污水处理技术,提高污水处理效果,减少水二次污染情况。膜生物反应技术对污水处理起到重要作用。对膜生物反应技术在环境工程污水处理中的应用进行分析和探讨。     

隧道弃渣场生态防护及污水治理

针对某隧道弃渣场含重金属渗漏水污染环境事件,进行水质检测及矿物元素分析,合理选取污水处理工艺,确定运行年限,采取生态防护与污水处理相结合的措施高效解决重金属污染水及污泥处置问题,取得了显著的环境效益,可为铁路渣场治理工程提供借鉴。     

The influence of nitrilotriacetic acid on heavy metal transfer in the activated sludge process-I. at constant loading

Removal of metals in the sewage treatment process is closely related to the chemical forms in which the metals exist. One critical factor controlling the forms of the metals in sewage is the chemical matrix of the sewage; as a consequence of their chelating capacity detergent builders are important in modifying the sewage matrix. Laboratory simulations of the activated sludge process have been studied to estimate the impact of the detergent builder nitrilotriacetic acid on the removal of heavy metals from sewage in this treatment process.The acclimation period for the biodegradation of nitrilotriacetic acid in a hard water synthetic sewage was found to vary from 16 to 31 days. In a soft water synthetic sewage, biodegradation was not observed even after 60 days. Hydrolysis of condensed phosphates in both hard and soft water synthetic sewages occurred within 3 h. Even when substantially biodegraded in hard water synthetic sewage, nitrilotriacetic acid appeared to be adversely affected by the absorption of cadmium, copper and zinc by the biological solids. The greatest absorption of heavy metals to the biological solids occurred when condensed phosphates were present. In soft water synthetic sewage metal absorption was minimal in the presence of nitrilotriacetic acid. In the presence of condensed phosphates absorption was considerably higher but not comparable with that achieved in hard water synthetic sewage.     

山西省污水厂污泥重金属处理技术

针对当前国内污泥处理现状及重金属污染防治难题进行了探讨,介绍了山西省污水厂污泥的特点,着重阐述了化学法、物理法、生物法处理污泥重金属的原理及特点,指出化学淋滤技术与生物淋滤技术可作为山西污水厂污泥重金属处理的主要技术路线。     

堆肥处理对排水污泥中重金属的钝化作用

讨论了城市排水污泥中重金属的含量和形态分布特征，分析了堆肥处理对污泥中重金属结合形态转化的影响。根据不同学者的研究结果，提出堆肥处理可降低污泥中Zn、Cu、Pb、Mn等重金属的活性，并指出堆肥处理是降低污泥在土地利用中重金属污染风险的途径。     

消化污泥中重金属的生物有效性研究

对城市污水处理厂消化污泥中重金属的形态分布进行了分析 ,并对污泥农业利用后重金属对作物的生物有效性进行了研究、试验 .结果表明 ,消化污泥中的重金属大部分以稳定态存在 ,植物可吸收量极少 .     

奥贝尔氧化沟总磷去除效果浅析

以某污水处理厂的污水处理为例,研究了生物除磷原理,针对该污水处理厂出水总磷去除率较差的现象,对流程各阶段溶氧数值进行了相应的实验分析,从而探索提高奥贝尔氧化沟处理工艺除磷效率的途径。     

The influence of heat treatment on the metallic and polycyclic aromatic hydrocarbon content of sewage sludge

Heat treatment followed by vacuum filtration or filter pressing is one method of dewatering sewage sludge. The concentrations of certain heavy metals and polynuclear aromatic hydrocarbons in raw sewage sludge, treated sludge cake and the resultant liquors have been determined in samples collected from three sewage treatment works in the United Kingdom utilising heat treatment. Mass balances have been calculated using the results obtained and the degree of resolubilisation of these materials which occurs during the treatment process has been determined.     

Environmental aspects of the use of NTA as a detergent builder

The behaviour, fate and significance of the detergent builder nitrilotriacetic acid (NTA) has been reviewed with particular reference to the removal of NTA during wastewater treatment and the effects of NTA on heavy metal solubility both during treatment and in the receiving environment. It is concluded that NTA removal during secondary biological treatment is subject to considerable variation, both temporal and between works as a result of changes in NTA load, temperature, water hardness and treatment process parameters. As a result of such variability, effluent NTA concentrations may be sufficient to mobilise heavy metals resulting in metal contamination of receiving waters and potable waters, particularly in areas of low effluent dilution and high water re-use. Removal of NTA during primary sedimentation and septic tank treatment is concluded to be predominantly due to adsorption to the sludge solids while removal in anaerobic sludge digestion is subject to operational characteristics of the treatment works. Disposal of NTA contaminated sludge to land may contaminate groundwaters and affect heavy metal speciation, while the disposal of contaminated sludge or sewage to sea may result in toxic algal blooms, in addition to effects on metal speciation.     

小城镇污水处理适用技术的比较分析

针对小城镇污水处理筛选出来的、典型的污水生物处理技术的特点进行分析，采用综合指标-分值比较的方法，对处理小城镇污水的适用性进行了阐述，并确定了应用小城镇污水处理适用技术的基本条件与要求。     

Source identification of heavy metals in sewage sludge and the effect of influent characteristics: a case study from China

To advance the reclamation of sewage sludge and evaluate the potential risk during sludge application, wastewater and sludge were sampled from seven secondary wastewater treatment plants seasonally in 2016 and 2017. The influent characteristics and the accumulation of eight toxic heavy metals in sludge were analyzed. According to the results, copper, chromium, nickle and zinc were the main heavy metals constraining reclamation of sewage sludge in Shanghai and they were mainly from domestic wastewater. Influent concentration, treatment process and coexisting elements had significant effects on accumulation of heavy metals in sludge. Lead concentration in sludge from AAC plants was generally higher than that from AAO plants, but for other metals the differences were insignificant or depended on the initial concentrations. Nutrients, suspended solids and coexisting heavy metals had significant effects on heavy metal accumulation in sludge when the initial concentration was controlled.