对城镇污水处理厂污泥处理处置技术路线选择的思考

分析了当前我国城镇污水处理厂污泥处理处置存在的问题和原因,详细介绍了处理和处置的关系、不同处置方式的基本要求和各类处理手段的作用。提出了按照处置决定处理,处理满足处置,处置方式多样,处理适当集约的思路选择污泥处理处置技术路线的相关建议。     

我国污水处理厂污泥处理处置需关注的若干内容

近年,污水处理厂污泥非法倾倒事件频发,反映出对污水处理厂污泥处理处置的重要性认识不足。废水与污水同网、源头废水污染物浓度超标纳网等问题客观存在,使得污水处理厂污泥在源头上具有"污染物"的特性。"重水轻泥"、责任主体不明、稳定化程度明显偏低、处置目标方向不清、部分技术标准不合理、规划缺失或不落地、部分工艺路线不合理等问题亦客观存在。为此,我国现阶段的污泥处理处置一定要充分注重污泥性质,坚持全流程绿色、低碳、合理循环的理念,提倡低碳、高性价比的厌氧消化工艺,在污泥尚存有机物污染、重金属污染等污染物特性的现状条件下规划并建设主要的处理路线即污泥的单独焚烧,切忌不遵循HSE原则的盲目化协同处理,避免再现"治污企业反致污"的陋象。     

如何处置污水处理厂的污泥

污泥通常是指主要由各种微生物以及有机、无机颗粒组成的絮状物，是城市污水、废水处理不可避免的副产品。污泥量通常占污水量的0．3％-0．5％（体积）或约为污水处理量的1％-2％（质量），如果属深度处理，会增加0．5倍-1倍。污水处理效率的提高必然导致污泥数量的增加。     

北京市污水处理厂污泥处理与处置探讨

通过对北京市城市污水处理与污泥处理处置现况的分析,结合北京市城市污泥的特性,参照国内外污泥处理处置技术,提出适合北京市的污泥处理处置技术路线,并对北京市的污泥处置的规划原则、方案进行初步探讨,同时提出北京市污泥处置工作的建议和意见,为今后的污泥处置规划、项目建设、运行监管等提供参考。     

浙江省“十二五”城镇污水处理厂污泥处置规划介绍

从浙江省城镇污水处理厂污泥处置现状问题入手,对污泥主要安全指标进行了对比分析,按照国家城镇污水处理厂污泥处置原则与技术要点,结合实际情况选择了浙江省城镇污水处理厂污泥处置方式,根据浙江省"十二五"城镇污水处理厂污泥处置规划要求,预测了浙江省城镇污水处理厂污泥处置规模和投资,并提出了相应的对策建议。     

我国城镇污泥处理处置现状及思考

<正>1我国城镇污泥处理处置现状1.1我国污泥处理处置现状随着我国城镇化水平不断提高,污水处理设施建设高速发展,截至2010年,城镇污水处理能力已达到1.22亿m3,城镇污水处理厂已达2600多座,"十二五"期间还将增加污水处理能力9000万m3,增建和在建城镇污水处理厂达1 800多座,为实现国家减排目标和污染控制,做出了巨大贡献。     

三峡库区污水处理厂污泥处理与利用方式探析

三峡库区污水处理厂污泥处理处置是库区水环境保护的热点问题之一。对三峡库区污泥处置现状和存在的问题进行了分析,针对库区污泥理化特性,从库区城乡社会经济实际出发,遵循污泥处理处置的减量化、稳定化、无害化和最终安全环保处置及综合利用原则,设计了适合库区的污泥处理处置与利用方式最佳技术路线,提出了三峡库区污泥处置的配套政策意见与建议。相关对策措施可为库区污泥处理处置项目的规划、建设与运行提供参考。     

青浦区城镇污水处理厂污泥处理与处置方式的探讨

本文在简要介绍城镇污水处理厂几种污泥处置典型工艺的基础上，结合青浦区污泥处置现状和存在的问题，通过分析已投入运营的城镇污水处理厂污泥特性，提出采用焚烧工艺作为青浦区城镇污水处理厂污泥处置方式。     

珠海市污水处理厂污泥处理处置探讨

在总结国内外常用污泥处理处置技术的基础上,结合珠海市污泥处理处置现状以及污泥特性,探讨其污泥处理工艺和处置设施厂址选择.建议珠海市中心城区污水处理厂污泥适宜的处置工艺为:半干化填埋和干化焚烧;并针对不同的工艺,对污泥集中处置设施厂址进行了综合比选.     

净水厂生产排泥水处理工艺研究与设计

通过对净水厂生产排泥水的产生和水质特性进行分析,确定沉淀池排泥水和滤池反冲洗废水为净水厂排泥水的主要组成,结合设计干泥量的计算确定排泥水处理规模,在分析排泥水处理系统工艺流程布置特点的基础上对排泥水收集、调节、浓缩和脱水工艺进行分析,并对其中排水池、排泥池、浓缩池、平衡池、脱水工艺和场地布置的设计要点进行总结。     

城市污水处理厂恶臭污染及其评价体系

城市污水处理厂的恶臭问题正在成为环境领域的一个重要研究课题。在阐述了城市污水处理厂恶臭气体的来源、主要组成成分及其浓度的基础上,进一步概述了我国城市污水处理厂的恶臭污染现状,并提出了针对我国城市污水处理厂恶臭污染的评价体系。该体系从恶臭物质的产生、迁移和所产生的影响三方面进行评价,能够较全面地反映城市污水处理厂的恶臭污染状况及其对周边环境的影响程度。     

污水处理厂脱水污泥中重金属的分布规律

针对污泥中重金属赋存形态尚不明确的问题,使用MacNicol提出的组分分离方法,以3个污水处理厂污泥为对象,研究了重金属在无机颗粒、生物絮团、胶粒、流动相4个组分中的分配情况。结果表明,脱水污泥的干物质中颗粒组分和生物絮团组分约占到了67％～94％,而在脱水污泥中颗粒组分和生物絮团仅占7％～22％,大多数属于流动相。这一组成特性决定了脱水污泥的大部分重金属分布在污泥流动相中,无机颗粒、生物絮团、胶粒中的重金属只占很少一部分。但从赋存浓度来看,流动相重金属浓度很低,相反有机相胶粒组分中重金属浓度较高。     

MBR工艺处理城镇污水处理厂污泥水中试研究

将平板膜组件与传统脱氮除磷工艺相结合,构建了膜生物反应器强化生物脱氮除磷中试系统,并用于处理城镇污水处理厂的污泥系统废水。结果表明,出水CODCr、BOD5、NH3—N、TN和TP的平均浓度分别为70.8 mg/L、8.7 mg/L、15.1 mg/L、29.7 mg/L和0.38 mg/L,达到或接近了《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级标准。     

季节性气候变化下污水处理厂性能及污泥特性分析

研究季节性气候变化条件下污水处理厂运行性能和活性污泥特性对科学、高效运行具有重要意义.以我国北方某城市污水处理厂改良AAO工艺系统为研究对象,基于2年完整的运行数据,分析了污染物去除量及污泥特性变化规律.结果表明,COD和TN去除量存在季节性周期变化趋势;MI.VSS/MLSS值在水温15℃以下相对稳定,在15℃以上时...     

污水处理厂污泥厌氧消化优化设计与运行探讨

对国内典型的污水处理厂污泥厌氧消化系统进行调研发现,厌氧消化系统的运行管理尚存在诸多问题。在总结白龙港污水处理厂污泥厌氧消化调试与运行管理经验的基础上,针对厌氧消化工艺存在的普遍性问题,提出了厌氧消化系统设计和运行管理方面的建议,以促进工艺设计优化,提高运行管理水平。     

活性污泥和生物膜复合/联合工艺在污水处理厂技术改造中的应用

随着我国污水处理厂污染物排放标准不断提高,许多污水处理厂面临技术改造问题。提出了技术改造的原则和引造的技术方案。综述了国内外活性污泥和生物膜复合/联合工艺在污水处理厂技术改造中应用和研究情况。该工艺用于污水处理厂的技术改造具有明显的优点,同时也指出了尚需解决的一些问题。     

Disinfection of sludge using lime stabilisation and pasteurisation in a small wastewater treatment plant.

Removal efficiency of faecal coliforms and helminth eggs was evaluated in a small wastewater treatment plant (WWTP) serving a population of 1,000. This system was formed by the association in series of a UASB reactor and four submerged aerated biofilters. The density of faecal coliforms and the count of helminth eggs were estimated in the liquid and solid phases of the system. Two different methods of disinfecting sludge were investigated: (a) chemical treatment with lime and (b) a physical treatment by pasteurisation. As expected, the association UASB + BF was very efficient at removal of helminth eggs from the final tertiary effluent, but coliforms were still present at high densities. Lime treatment and pasteurisation of sludge were very effective methods of disinfection and produced a sludge safe for final disposal.     

Activated sludge wastewater treatment plants optimisation to face pollution overloads during grape harvest periods.

The principal objective of our study was to optimise a municipal activated sludge wastewater treatment plant (WWTP) to face high organic flows due to viticulture effluents inputs. Treatment file optimization consisted in testing different treatment lines, changing the number and volume of biological basins and clarifiers, with or without a buffer basin upstream, with a view to achieving a better reduction of COD. The actual WWTP biological stage is composed of two aerated basins whose total volume is 1365 m3. The studied cases are successively, the installation of a single basin of 1365 m3, then of several basins whose total volume remains constant and equal to 1365 m3. Another case was also considered, that of an aerated basin followed by a first clarifier and then, by another aerated basin and a second clarifier. All scenarios presented below were evaluated, for standard dry weather conditions and for high organic load conditions, as encountered during the grape harvest period. The method used was to carry out various simulations, using numerical modelling, and to compare the impact of different process line scenarios and management strategies on the activated sludge WWTP efficiencies.     

Automatic control for do and pH in the activated sludge process in a coke wastewater treatment plant

The objective of this study is to develop an automatic control system for dissolved oxygen (DO) and pH of the activated sludge process in a coke wastewater treatment plant. A discrete type autotuned proportional-integral (PI) controller using an auto-regressive exogenous (ARX) model as a process model was developed to maintain the DO concentration in aerators by controlling the speed of surface aerators. Also a nonlinear pH controller using the titration curve was used to control the pH of influent wastewater. This control system was tested in a pilot scale plant. During this pilot plant experiment, there was small deviation of pH and the electric power consumption of surface aerators was reduced up to 70% with respect to the full operation when the DO set point was 2 mg/1. For real plant operation with this system, the discrete PI controller showed good tracking for set point change. The electricity saving was more than 40% of the electricity consumption when considering surface aerators. As a result of maintaining the DO constantly at the set point by the automatic control system, the fluctuation of effluent quality was decreased and overall improvement of the effluent water quality was achieved.