低温条件下UASB+AMT工艺处理垃圾渗沥液的试验研究

通过对某市生活垃圾填埋场渗滤液处理的试验研究，得UASB AMT工艺在低温条件下的处理效果，并对运用该工艺处理垃圾渗滤液所存在的问题进行了讨论。     

混凝-电化学氧化处理垃圾渗滤液MBR出水的效能研究

采用“混凝-电化学氧化”组合工艺对某垃圾填埋场中渗滤液MBR出水进行深度处理，探究了混凝工艺、电化学氧化过程中电极种类及运行参数对MBR出水中COD去除效果的影响，并讨论了混凝预处理在MBR出水电化学氧化过程中的重要意义。试验结果表明，“混凝-电化学氧化”组合工艺对垃圾渗滤液MBR出水中COD的降解效果显著。混凝预处理可去除MBR出水中68%以上的COD含量，同时可缓解电化学氧化的有机负荷，缩短电解时间，节约能耗，强化电化学氧化对水样中COD的降解效率，避免额外的深度降解工艺及成本投入，具有较好的经济环境效益。电化学氧化过程中，三种电极对该垃圾渗滤液MBR出水的处理能力大小为PbO₂>Ru系电极>Pt电极；采用Ti/PbO₂电极电解混凝处理后的MBR水样时，仅需在室温下进行，且当电流密度在50～70 A/m²时，水样中COD的去除率可达96%以上，出水COD含量可降至10 mg/L左右，处理效果更佳。     

膜生物反应器处理垃圾渗滤液研究进展

垃圾渗滤液由于污染负荷高,水质复杂,传统的活性污泥法处理难以达到相关的国家排放标准,是国内外污水处理的难题。相比于传统活性污泥法,MBR的水力停留时间(HRT)更短,有机负荷率(OLR)更高,出水稳定且有机残留低,近年来在渗滤液处理工艺中得到了广泛的应用。本文讨论了国内外膜生物反应器处理渗滤液的研究进展,对存在的问题进行了分析,提出了MBR处理渗滤液技术的发展方向。厌氧MBR在渗滤液处理和沼气生产上有很大潜力,而活性炭联用MBR在去除难降解物质和缓解膜堵塞方面表现出色。     

膜生物反应器（MBR）工艺处理烟草废水的试验研究

对膜生物反应器(MBR)工艺处理卷烟厂烟草废水进行现场试验研究,详细介绍了工艺流程、设备以及运行的主要控制参数。主要工序包括水解酸化、好氧曝气、MBR膜过滤和二沉池排水。实际运行结果表明,MBR工艺处理卷烟厂烟草废水的效果良好,系统产水水质达到城市绿化用水的水质标准,解决了一般废水处理系统膜污堵严重的运行难题。     

垃圾渗滤液脱氮处理工艺的工程实例

介绍了采用氨吹脱＋生物处理＋臭氧氧化工艺在深圳市过桥窝垃圾填埋场垃圾渗滤液处理中的应用情况。经半年多的运行实践证明：该工艺对渗滤液中氨氮去除效果稳定，对于氨氮浓度高达2000～2500mg／L的渗滤液，处理后出水可降至2～10mg／L，氨氮去除效率达99％以上。     

废渣场渗滤液处理工艺设计

从渗滤液的来源、水质、处理工艺和单体构筑物等方面介绍废渣场渗滤液处理工艺设计。采用"两级纳米铁反应沉淀+氧化絮凝沉淀+过滤"的处理工艺出水可达《地表水环境质量标准》(GB 3838-2002)Ⅳ类标准。实践证明,该工艺具有处理效果稳定,投资及运行费低的特点。     

小型豆制品废水处理工程设计实例

豆制品含有大量植物蛋白、草酸、胶原体等易被微生物降解的物质,可生化性强,属于高浓度有机废水.为满足某村豆腐丝加工业发展需要,建设一座处理规模为100 m3/d的小型豆制品废水处理工程,采用气浮+UASB+A2/O工艺.本文介绍了豆制品废水处理工艺设计方案、主要构筑物和设计参数,分析了工艺方案特点和工艺运行条件控制.该工...     

浅谈垃圾渗沥液处理的工程应用

结合某项目公司渗沥液处理工程,介绍厌氧+生化+膜处理工艺在渗沥液处理中的应用。该渗沥液处理站采用高效厌氧反应器UAIC+AO+MBR+NF+RO膜组合工艺,稳定运行后部分超滤产水与纳滤产水混合后达到《GB8978—1996污水综合排放标准》三级标准(COD300 mg/L)外排至污水处理厂。剩余纳滤产水经过反渗透后达到《GB/T19923—2005城市污水再生利用工业用水水质标准》后作为项目生产水补充回用。该工艺处理效果明显,运行能耗低,操作灵活且二次污染少,具有明显的技术经济优势。     

浸没式MBR在钢铁厂废水处理中的应用

膜生物反应器(MBR)是将生物处理与膜分离技术相结合的一种高效污水处理与回用新工艺。广州JFE钢板有限公司冷轧工程废水站生化处理单元选用了浸没式膜生物反应器(MBR)工艺,运行平稳,出水水质稳定,为后续废水深度处理回用奠定了坚实的基础。本文介绍浸没式膜生物反应器(MBR)的材质、结构、工作原理、设计参数、运行状态及膜装置的清洗、储存等。     

超滤+真空闪蒸法资源化回收废乳化液工艺研究

针对现有废乳化液处理工艺产生污泥量较大、处理效果不理想、产品品质较低、无法有效实现废乳化液资源化回收的情况,提出了超滤+真空闪蒸工艺.介绍了超滤+真空闪蒸法工艺的预处理、超滤和真空闪蒸过程及处理效果,并探讨了原料物性、操作压力、操作温度、真空度对工艺的影响,分析了每吨废乳化液的处理成本.结果表明,废乳化液COD含量越大...     

应用MBR处理焦化废水的中试试验研究

本试验采用膜生物反应器(MBR)技术对焦化废水进行处理,把试验装置(膜分离部分)做成模块化操作单元,直接与丹东某焦化厂的A/O生物脱氮处理过程相连接后进行中试试验,并与该厂的A/O法进行处理效果对比。结果表明,MBR对于COD以及NH3-N的处理效果均好于该厂的A/O法。     

曼托维蒂堆浸-溶剂萃取-电积厂的工艺改进

曼托维蒂（Mantoverde）是一家堆浸-溶剂萃取-电积厂，投产于1995年12月份，每年产铜42130t．矿石处理量540万t。该厂铜产量稳步增长，已于2002年达到57290t。预计到2003年可处理铜矿石850万t，产铜60000t。该厂已经对堆浸工艺实施了一些改进。主要工艺改进有矿堆高度、废石粒度、冲洗率和浸出周期，另外改善了矿堆排水设计和溶液管理系统。第一次废石堆浸操作开始于1999年，铜产量为1922t。第二次废石堆浸操作开始于2002年初，铜产量为2805t。铜的废石堆浸产量将随着时间增加到24000t。本文详述了矿石堆浸工艺较之原工厂设计所做的主要改进以及主要的废石堆浸操作参数。     

曼托维蒂堆浸-溶剂萃取-电积厂的工艺改进

曼托维蒂(Mantoverde)是一家堆浸-溶剂萃取-电积厂,投产于1995年12月份,每年产铜42 130t,矿石处理量540万t.该厂铜产量稳步增长,已于2002年达到57 290t.预计到2003年可处理铜矿石850万t,产铜60 000t.该厂已经对堆浸工艺实施了一些改进.主要工艺改进有矿堆高度、废石粒度、冲洗率和浸出周期,另外改善了矿堆排水设计和溶液管理系统.第一次废石堆浸操作开始于1999年,铜产量为1 922t.第二次废石堆浸操作开始于2002年初,铜产量为2 805 t.铜的废石堆浸产量将随着时间增加到24000t.本文详述了矿石堆浸工艺较之原工厂设计所做的主要改进以及主要的废石堆浸操作参数.     

New Integrated Processes for Treating Cold-Rolling Emulsion Wastewater

Two new integrated processes, gas-energy-management (GEM)—electrochemical catalytic oxidation (ECO)—membrane bioreactor (MBR) and ultrafiltration (UF)—ECO—MBR, in industrial-scale test for treating cold-rolling mill emulsion wastewater with water quantity of 200 L/h to 3000 L/h were studied. The former was put forward firstly and the latter was applied initially in this field. The operation conditions and mechanisms of each module in the integrated processes were analyzed and the influences of operational parameters of two processes on chemical oxygen demand (COD_Cr) removal efficiency were comparatively investigated. The test results showed that the ultimate water quality from the two processes after treatment could meet the requirement for reuse. However, the quality of effluent treated by GEM—ECO—MBR was more stable than that of UF—ECO—MBR.     

探讨电网电压的波动对电锅炉系统的影响

穆利亚希铜湿法厂于2009年12月开始进行设计,2012年4月搅拌浸出建成投产,其中加温浸出是穆利亚希铜湿法厂的特色,也是穆利亚希铜湿法厂成本的关键所在,通过近几年的自动化控制技术实践探索和创新,设备的完好率达到98%,设备运转率达到95%,设备运行日趋稳定,为穆利亚希铜湿法厂实现增产达标、提质增效奠定了坚实的基础。     

Optimization of Biological Nutrient Removal in a Membrane Bioreactor System

The main objective of the present study is to develop a modified membrane bioreactor (MBR) system for the treatment of municipal wastewater for the enhanced biological removal of nitrogen (N) and phosphorus (P) simultaneously with the ultimate goal of optimizing the two processes. The paper will address the implementation and optimization of the MBR process with respect to biological characteristics, operational performance, and effluent quality. The system utilizes anoxic P uptake and nitrification–denitrification in a MBR. Following optimization, the system achieved 99% chemical oxygen demand (COD), 98.4% NH3–N, 77.5% TN, and 96.3% P removal producing effluent biological oxygen demand, COD, NH3–N,NO3–N,NO2–N, and P of <3, 3, 0.4, 5.8, 0.050, and 0.18?mg/L, respectively.     

生物堆浸生产工艺实时监控系统

针对复杂的生产工艺仅靠简单的单回路调节器,无法消除生产中的诸多故障隐患。着重介绍生物堆浸生产工艺实时监控系统的原理及作用,该系统能优化生物堆浸生产工艺参数,降低设备故障率,实现计算机在线控制,提高堆浸厂的自动化综合管理水平。     

Combined Anaerobic/Aerobic Secondary Municipal Wastewater Treatment: Pilot-Plant Demonstration of the UASB/Aerobic Solids Contact System

Anaerobic pretreatment followed by aerobic posttreatment of municipal wastewater is being used more frequently. Recent investigations in this field using an anaerobic fluidized bed reactor/aerobic solids contact combination demonstrated the technical feasibility of this process. The investigation presented herein describes the use of a combined upflow anaerobic sludge bed (UASB)/aerobic solids contact system for the treatment of municipal wastewater and attempts to demonstrate the technical feasibility of using the UASB process as both a pretreatment unit and a waste activated sludge digestion system. The results indicate that the UASB reactor has a total chemical oxygen demand removal efficiency of 34%, and a total suspended solids removal efficiency of about 36%. Of the solids removed by the unit, 33% were degraded by the action of microorganisms, and 4.6% accumulated in the reactor. This low solids accumulation rate allowed operating the UASB reactor for three months without sludge wasting. The long solids retention time in this unit is comparable to the one normally used in conventional sludge digestion units, thus allowing the stabilization of the waste activated sludge returned to the UASB reactor. Particle flocculation was very poor in the UASB reactor, and therefore, it required postaeration periods of at least 100?min to proceed successfully in the aerobic unit. Polymer generation, which is necessary for efficient biological flocculation, was practically nonexistent in the anaerobic unit; therefore, it was necessary to maintain dissolved oxygen levels greater than 1.5?mg/L in the aerobic solids contact chamber for polymer generation to proceed at optimum levels. Once these conditions were attained, the quality of the settled solids contact chamber effluent always met the 30?mg BOD/L, 30?mg SS/L secondary effluent guidelines.     

Fate of Anionic Surfactants in a 38?ML/Day UASB-Based Municipal Wastewater Treatment Plant: Case Study

The outcome of a 15-month monitoring study (August 2004–October 2005) on the anionic surfactants (AS), at the 38?ML/day up-flow anaerobic sludge blanket (UASB)-based sewage treatment plant (STP) is described. The average removal of AS was only around 57%. Appreciable concentration of AS was being discharged to the watercourse (average 2.41?mg/L; range 0.63–5.16?mg/L). On an average dried sludge contained 1,560?mg?AS?kg?1 dry weight. Mass balance indicated that, AS load of the orders of 23 and 33% is removed by adsorption in UASB reactors and polishing ponds (PP), respectively. Biodegradation of AS under anaerobic conditions in UASB reactors and PP does not seem to take place. In the sludge stream, appreciable biodegradation ( ≈ 70%) of adsorbed AS under aerobic conditions on the sludge drying beds takes place. If influent AS mass flux is normalized to 100?units, than 43 and 7?units are discharged with treated effluent and dried sludge, respectively, whereas 33 and 16?units are adsorbed/settled in PP and aerobically biodegrade on sludge drying beds, respectively.