深床反硝化滤池的应用现状和工艺设计

深床反硝化滤池是国内外污水处理厂深度处理工艺的重要选项之一,为提高深床反硝化滤池的工艺设计和应用水平,分析了深床反硝化滤池的工艺特点,介绍了深床反硝化滤池在国内外污水处理厂深度处理中的应用现状,指出了影响深床反硝化滤池处理效果的主要因素和解决措施,并结合工程实例介绍了深床反硝化滤池的工艺设计,比较了该工艺与其他常见替代工艺之间的技术经济差异。     

反硝化组合工艺在污水深度处理中的应用

由于排放标准的提高,某石化企业污水二级生化装置排水,进入深度处理装置再处理,该深度处理装置采用"反硝化滤池+臭氧+生物活性炭滤池+高密度沉淀池"的工艺,处理后污水水质达到CODCr≤30mg/L、氨氮≤2mg/L、总氮≤15mg/L、总磷≤0.3mg/L.装置投运后运行较为平稳.2020年大修后,CODCr去除率为74...     

反硝化滤池用于城市污水深度处理的研究进展

反硝化滤池是一种将生物氧化与深床过滤机理有机结合的现行污水处理技术。文章阐述了反硝化滤池的工艺原理和工艺特点,从工艺的挂膜与启动、填料、碳源、动力学和反硝化脱氮过程中N_2O的释放方面,详细介绍了反硝化滤池的最新研究进展和探讨了反硝化滤池的发展趋势。同时,指出了反硝化滤池今后在城市污水深度处理中的研究方向。     

城镇污水处理厂提标改造工程工艺设计典型示范

介绍城镇污水处理厂提标改造工程为满足一级A出水排放标准及污泥脱水含水率60%要求的典型工艺设计:预处理+A2/O处理工艺+反硝化深床滤池+深度处理(斜板絮凝沉淀+V型砂滤)+紫外线次氯酸钠联合消毒工艺,污泥深度处理采用叠螺机机械浓缩、添加生石灰和三氯化铁调理+隔膜压滤机脱水工艺。实际运行表明,水质抗冲击性强,工艺运行稳定,出水水质达到一级A排放标准。     

石洞口污水处理厂提标改造工程

上海石洞口污水处理厂原设计处理规模为40万m~3/d,原主体工艺采用UNITANK工艺。改造后污水处理工艺采用"粗格栅+细格栅+旋流沉砂池+综合池+生物反应池+高效沉淀池+反硝化深床滤池"的全流程工艺配置,多模式运行,出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准后排入长江。     

SE-东方炉水煤浆气化污水处理工艺

SE-东方炉气化装置外排污水氨氮含量高、硬度高,采用预处理、活性污泥生化处理和深度处理的工艺流程.预处理采用化学沉淀工艺除硬,生化处理采用短程硝化反硝化工艺脱氮,深度处理工艺采用"臭氧催化氧化+曝气生物滤池",设计处理后的污水达到特别排放限值:氨氮含量不高于5 mg/L,总氮含量不高于25 mg/L,COD不高于50 ...     

反硝化深床滤池在污水厂提标改造工程中的运行分析

在执行更严格的TN排放标准的工艺设备中,反硝化深床滤池获得了水处理行业的认可。针对珠海市某污水处理厂提标改造工程,通过中试实验,验证了改造后全工艺的运行处理能力,以及进水为高浓度氨氮模拟废水时,反硝化深床滤池出水的稳定性,并详述了实际工程中该工艺工程的设计参数及系统运行效果,为反硝化深床滤池在提标改造工程的应用提供参考。     

BDP工艺应用于华中某污水厂体表改造工程中试实验

采用生物倍增+赛莱默深床反硝化滤池工艺应用于华中地区某污水厂中试系统,其COD去除率达到90.2％、氨氮去除率均值达到94.2％、TP去除率为93.52％,出水效果稳定.该结果表明,采用生物倍增+反硝化滤池工艺能够有效提升污水厂出水水质,为污水厂进行提标改造工程提供理论依据.     

深床反硝化滤池在深度脱氮处理的应用

采用深床反硝化滤池对宁波某污水处理厂的出水进行深度脱氮处理。出水SS控制在10 mg/L以下,乙酸钠投加质量浓度在70 mg/L,经深床反硝化滤池处理后,TN可被消除80%以上,出水实现TN15 mg/L的目标。     

某污水处理厂扩建及提标改造工程设计与运行

随着污水处理厂出水标准越来越严格,高邮市某污水处理厂原一期百乐克(BIOLAK)工艺是无法满足要求的。针对这些问题,扩建及提标改造工程预处理采用水解酸化池,生化处理采用改良AAO工艺,深度处理采用"高密度沉淀池+深床反硝化滤池"组合工艺,确保出水水质稳定达标。改造工程包含扩建、提标两部分内容,生化处理扩建规模为3.5万m^3/d,预处理和深度处理规模为6.0万m^3/d。采用了较为先进的工艺设计理念,选取合理的设计参数,可供同类污水处理厂扩建及提标改造时参考。     

污水深度处理工艺的比较研究

污水经过长时间的生化处理后,大量易生化和可生化的有机污染物均大部分得到降解,而残留于水中的微量有机物却影响了污水的达标排放。这些残留于污水中的有机污染物采用进一步生物处理、物理吸附的方式都无法达到出水要求。在对臭氧氧化、芬顿催化氧化、MBR、BAF几种深度处理方式对比的基础上,确定深度处理工艺为反硝化滤池(DNBF)+曝气生物滤池(BAF)+高级氧化组合工艺。     

Influence of sludge loadings and types of substrates on nutrients removal in MBRs

It has been shown that by combining the patented process for biological phosphorus removal with post-denitrification without additional carbon dosing in membrane bioreactors (MBRs) good nutrient eliminations can be achieved. Especially, reported denitrification rates are higher than expected ones. The reason for this is not understood yet but a correlation between acetate dosing in batch trials and DNR has been reported. The present study investigated the influence of COD sludge loading and acetate inflow concentration on denitrification rates in continuous MBRs. A laboratory scale MBR operated with synthetic wastewater was switched from a multi to a mono substrate (acetate) wastewater and compared to three other MBR connected to separate sewer systems. Better eliminations for COD, TN and TP for the MBR operated with acetate were expected. However, elimination efficiencies were on a good level for all plants and configurations (eliminations: 94-97% COD, 86-94% TN, 92-99% TP) and no significant increase for mono substrate could be found. Average denitrification rate and TN elimination was even a bit lower with mono substrate. For increasing COD sludge loads increasing denitrification rates could be found. However, the variation within the rates has proved that many different influences have to be considered.     

Survey of MBR market: Trends and perspectives in China

Membrane bioreactor (MBR) has gained considerable attention for wastewater treatment and reuse in China in the last two decades. Comparing with the global MBR market, which has an average annual growth rate of 10.9%, the average annual growth rate in China is nearly 100% in recent years. In the past 10 years, publications on MBR researches and applications for wastewater treatment have increased sharply. Over three hundred MBR plants have been successfully applied into practice for different wastewater treatments, such as municipal wastewater, bathing wastewater, restaurant wastewater, landfill leachate, hospital wastewater, petrochemical wastewater and high-concentration industrial wastewater. These plants have capacities ranging from 10 to 100,000 m³/d, among which over 12 MBR plants have capacities exceeding 10,000 m³/d. The largest MBR plant, i.e. Beijing Kunyu River WWPT, which has a capacity of 100,000 m³/d for municipal wastewater treatment and reuse, was constructed in Beijing by Origin Water Technology Co., Ltd. The largest MBR plant for industrial wastewater treatment was located in Tianjin and installed by Motimo Membrane Inc., which has a capacity of 30,000 m³/d. The largest MBR application for industrial sectors was petrochemical wastewater treatment, and over ten MBR plants each exceed a capacity of 5000 m³/d. In South-east China, the constructed MBRs are mostly involved in the high-strength industrial wastewater treatment while in North China MBRs mainly focused on municipal wastewater treatment and reuse.For an MBR commercial application in China, MBR plants were constructed by a lot of home-grown companies such as Tianjin Motimo Membrane Technology Co., Ltd., Beijing Origin Water Technology Co., Ltd. and Omexell Environmental Engineering Co., Ltd. and overseas-funded companies like Zenon-GE and CNC-Simens. Origin Water occupies the majority of the MBR market in China, whereas CNC-Simens and Zenon-GE have a larger number of installations in other parts of China. MBR unit key suppliers in China are Zenon (Canada), Mitsubishi-Rayon (Japan), Toray (Japan), Kubota (Japan), Norit (Netherlands), Motimo (China) etc.Due to more stringent regulations and wastewater reuse strategies, it is expected that a significant increase in MBR plant capacity and a widening of application areas will occur in the future.     

MBR和BAF用于城市污水深度处理的工艺特性比较

采用膜生物反应器(MBR)和曝气生物滤池(BAF)2种工艺分别对以生活污水为主的城市污水进行深度处理,以达到污水回用的目的.中试结果表明,在平均水温仅为5℃的情况下,MBR工艺的处理效果明显优于BAF,MBR_4~+工艺对COD、BOD＿5、NH_4~+-N和TP的去除率分别可以达到75%、92%、95%和90%,,而BAF对COD、BOD_5、NH_4~+_N和TP的去除率仅为70%、78%、29%和82%.经核算,MBR和BAF的污水处理运行费用分别为0.82元·m~(-3)和0.55元·m~(-3).与BAF相比,MBR具有处理效果优良、出水稳定、占地面积少,且维护管理方便等特点,因此,在以污水回用为目的的实际工程中推荐采用MBR工艺.     

提高城镇污水处理厂脱氮除磷潜能的案例分析

"十二五"污染物减排增加了对氨氮的指标要求,通过对城镇污水处理厂运行情况和减排能力的分析,研究城镇污水处理厂在现状下污染物减排的潜能和进一步脱氮除磷的可行性,在此基础上提出进一步减排的措施,即通过加强运行管理和局部的设施改造来降低出水污染物浓度,为污染物减排决策提供依据。     

应用膜生物反应器处理焦化污水

膜生物反应器(MBR)是膜分离与生物反应器相结合的新型水处理技术。焦化污水是一种高浓度、难降解的工业污水，应用传统的生化方法处理焦化污水存在费用大、效率低的缺点。作者采用一体浸没式膜生物反应器处理焦化污水，调整合适的操作参数，污水中主要污染物COD、NH2-N的去除率分别达到80％、98％以上，操作简单，出水水质稳定，且远好于国家一级排放标准，取得了良好的效果，有一定的推广意义。     

Sustainable reclamation and reuse of industrial wastewater including membrane bioreactor technologies: case studies

One of the most crucial and difficult elements of the bioprocess is its ability to separate between the biosolids and the liquid effluent phase. The objectives of this study were to evaluate practical possibilities to upgrade existing wastewater treatment facilities by operating aerobic treatment based on MBR technology, in order to obtain high quality effluent for sustainable reclamation and reuse of industrial wastewater. Three different types of industrial wastewaters have been biologically treated by MBR working on hollow fiber technology: (a) paper mill; (b) food production; (c) fuel port facilities. The MBR received preliminarily treated effluent by anaerobic, chemical and physical processes, respectively. The experimental work in this study indicated that biological treatment of industrial wastewater containing contaminants characterized by hydrophobicity and/or by low biodegradability would require the adaptation of the MBR operation conditions, by lowering cell residence time and MLVSS in the bioreactor and by increasing the amounts of excess biosolids accordingly. The effluent was of high quality and could be considered for reuse in paper mill and food production.     

膜生物反应器(MBR)技术及其工程应用探讨

膜生物反应器(MBR)废水处理技术开发始于20世纪90年代,近年来MBR技术的应用在世界上维持着每年高于10%的增长率。随着对水资源利用水平要求的不断提高,我国已经成为世界上MBR工程应用增长最快的国家。特别是2005年以来,处理能力5 000m3/d以上的新建大中型MBR项目均保持大于100%的年增长率。作者介绍了膜生物反应器(MBR)污水处理技术工程应用的主要类型及特点,总结了膜污染的机理、主要影响因素及当前工程上对膜污染的主要控制手段,给出了当前几种典型的生活污水及工业废水MBR工艺的工程应用的技术经济情况,显示出MBR工艺的应用前景。     

A novel approach to an advanced tertiary wastewater treatment: Combination of a membrane bioreactor and an oyster-zeolite column

A combination of a microfiltration-membrane bioreactor (MBR) and oyster-zeolite (OZ) packed-bed adsorption column was studied for the first time to evaluate the advanced tertiary treatment of nitrogen and phosphorous. The membrane module was submerged in the bioreactor and aeration was operated intermittently for an optimal wastewater treatment performance. Artificial wastewater with COD_cr of 220 mg/L, total nitrogen (T-N) of 45 mg/L, and total phosphorous (T-P) of 6 mg/L was used in submerged MBR with MLSS of 4,000–5,000 mg/L. The experiments were performed during a 100-day period with periodic membrane washing. The results showed that COD_cr could be effectively removed in the MBR alone with over 96% removal efficiency. However, T-N and T-P removal efficiency was slightly lower than expected with only the MBR. The permeate from MBR was then passed through the OZ column for tertiary nutrient removal. The final effluent analysis confirmed that nutrients can be additionally removed resulting in over 90% and 53% removal efficiencies for T-N and T-P, respectively. The results of this study suggest that the waste oyster shell can be effectively reclaimed as an adsorbent in advanced tertiary wastewater treatment processes in combination with a MBR.