北京市北小河污水处理厂MBR系统运行分析

北京市北小河污水处理厂是国内较早采用MBR工艺的大型污水处理工程,已稳定运行了3年多。对污水处理厂MBR工艺实际运行数据进行分析,并介绍了运行过程中出现的膜丝缠绕、生物池污泥浓度不均衡、膜清洗药剂消耗等问题及相应的改造措施,在此基础上对MBR工艺的设计提出建议。     

北京市北小河污水处理厂MBR系统运行分新

北京市北小河污水处理厂是国内较早采用MBR工艺的大型污水处理工程,已稳定运行了3年多.对污水处理厂MBR工艺实际运行数据进行分析,并介绍了运行过程中出现的膜丝缠绕、生物池污泥浓度不均衡、膜清洗药剂消耗等问题及相应的改造措施,在此基础上对MBR工艺的设计提出建议.     

大理某MBR城镇污水处理厂技术诊断及优化分析

对大理以MBR+人工湿地为处理工艺的某城镇污水处理厂通过工程数据收集、水质数据分析、现场勘查等方式进行技术诊断,发现该污水处理厂的主要问题是出水TN、TP和悬浮物长期超标,主要原因是进水负荷低;未安装化学除磷设备;MBR池DO、污泥回流比控制不当和膜清洗不规范及人工湿地运行不善。针对存在的问题,从进水、工艺、运行参数调整和运行管理强化等几个方面进行了优化调控分析,保证污水处理厂的出水实现稳定达标。     

无锡梅村污水处理厂MBR工艺多年运行效果分析

回顾了无锡梅村污水处理厂二期工程MBR的系统设计,对收集到的运行数据进行分析,通过剖析关键的性能指示参数,包括出水水质、跨膜压差、膜的透水率等,分析了7年多来MBR工艺的运行效果和膜性能。为MBR工艺污水处理厂运行管理提供数据支撑。     

三种两段缺氧A~3/O-MBR工艺脱氮除磷效率分析

以太湖流域3座采用两段缺氧的A3/O—MBR工艺的城市污水处理厂(城北污水处理厂、硕放污水处理厂及太湖国家度假区污水处理厂)为研究对象,介绍其工程概况和主要运行参数。通过对这3座污水处理厂运行效果的分析比较,初步研究其脱氮除磷效率。结果表明,各污水处理厂的氮磷去除效果均较好,出水水质稳定达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)中的一级A排放标准,增加后置缺氧段的A2/O/A—MBR工艺强化了脱氮除磷功能,去除效果明显优于其他2座污水处理厂。     

MBR工艺在太湖流域污水处理工程中的应用

以太湖流域7座膜生物反应器(MBR)工艺污水处理工程为例,对MBR工艺应用中的生物段形式、膜组件选择、生物段和膜段工艺参数的设计进行探讨,并介绍了几座MBR类污水处理工程的设计情况,最后提出了MBR类污水处理厂在应用中需要重点考虑的问题。     

平板膜生物反应器在川西生活污水处理厂的应用

四川省绵竹市某镇区污水处理厂一期工程设计规模4 000 m3/d,采用平板膜生物反应器(MBR)工艺,为该技术在川西生活污水处理厂中的首次应用,出水水质达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准.介绍了工程的设计参数、处理工艺流程及其设计特点,并对实际运行效果做了分析.     

基于BioWin的MBR工艺模拟

以实际运行污水处理厂MBR工艺为研究对象,利用BioWinTM软件平台及其内嵌的通用活性污泥模型和厌氧消化模型(ASDM),建立了工艺模拟模型并进行初步模拟及校正,利用校正的模型对MBR工艺的运行参数进行了模拟分析,得到出水水质对工艺参数的敏感度,从而总结出了部分运行指南。     

MBR+高级氧化工艺在高排放标准污水处理厂中的应用

北京某镇级污水处理厂,设计规模为3 000m~3/d,进水为市政污水,采用预处理+膜生物反应器(MBR)+高级氧化(AOPs)工艺,出水要求同时达到《城市污水再生利用城市杂用水水质》(GB 18920-2002)与北京市《城镇污水处理厂水污染物排放标准》(DB 11/890-2012)表1中的A标准。详细介绍了高排放标准要求下的污水处理厂工艺流程选择,以及相关工艺单体的优化设计和设备选型。     

MBR工艺机械性预处理系统的选择与设计

污水预处理对污水处理厂的正常运行起着重要的作用。结合无锡市城北污水处理厂设计实例,详细介绍了MBR工艺的整套机械性预处理系统的组成及各种预处理机械设备的工作原理、选型要求、安装位置和主要技术参数。     

Application of membrane bioreactor system with full scale plant on livestock wastewater.

A full-scale plant of an MBR system treating livestock wastewater has shown impressive results. The Cheorwon County Environmental Authorities adopted the MBR process with UF membrane for retrofitting the old plant, which removes organic matter, nitrogen and phosphorus at a high level. According to 6 months operation data, BOD and SS removal were about 99.9% and COD(Mn), TN and TP removal were 92.0%, 98.3% and 82.7%, respectively. It is considered that the temperature at the bioreactor has to be controlled to be below 40 degrees C so as to ensure sufficient nitrification. It appeared that the MBR system is competitive with other conventional technologies for treatment of livestock wastewater such as piggery waste.     

Membrane bio-reactor for advanced textile wastewater treatment and reuse.

Textile wastewater contains slowly- or non-biodegradable organic substances whose removal or transformation calls for advanced tertiary treatments downstream Activated Sludge Treatment Plants (ASTP). This work is focused on the treatment of textile industry wastewater using Membrane Bio-reactor (MBR) technology. An experimental activity was carried out at the Baciacavallo Wastewater Treatment Plant (WWTP) (Prato, Italy) to verify the efficiency of a pilot-scale MBR for the treatment of municipal wastewater, in which textile industry wastewater predominates. In the Baciacavallo WWTP the biological section is followed by a coagulation-flocculation treatment and ozonation. During the 5 months experimental period, the pilot-scale MBR proved to be very effective for wastewater reclamation. On average, removal efficiency of the pilot plant (93% for COD, 96% for ammonium and 99% for total suspended solids) was higher than the WWTP ones. Color was removed as in the WWTP. Anionic surf actants removal of pilot plant and WWTP were very similar (92.5 and 93.3% respectively), while the non-ionic surfactants removal was higher in the pilot plant (99.2 vs. 97.1). In conclusion the MBR technology demonstrated to be effective for textile wastewater reclamation, leading both to an improvement of pollutants removal and to a draw-plate simplification.     

MBR technology: a promising approach for the (pre-)treatment of hospital wastewater

Membrane bioreactor (MBR) technology is a very reliable and extensively tested solution for biological wastewater treatment. Nowadays, separate treatment of highly polluted wastewater streams especially from hospitals and other health care facilities is currently under investigation worldwide. In this context, the MBR technology will play a decisive role because an effluent widely cleaned up from solids and nutrients is absolutely mandatory for a subsequent further elimination of organic trace pollutants. Taking hospital wastewater as an example, the aim of this study was to investigate to what extent MBR technology is an adequate 'pre-treatment' solution for further elimination of trace pollutants. Therefore, we investigated - within a 2-year period - the performance of a full-scale hospital wastewater treatment plant (WWTP) equipped with a MBR by referring to conventional chemical and microbiological standard parameters. Furthermore, we measured the energy consumption and tested different operating conditions. According to our findings the MBR treatment of the hospital wastewater was highly efficient in terms of the removal of solids and nutrients. Finally, we did not observe any major adverse effects on the operation and performance of the MBR system which potentially could derive from the composition of the hospital wastewater. In total, the present study proved that MBR technology is a very efficient and reliable treatment approach for the treatment of highly polluted wastewater from hospitals and can be recommended as a suitable pre-treatment solution for further trace pollutant removal.     

MBR与接触氧化工艺用于中水处理的比较

某高校中水处理工程采用MBR代替接触氧化工艺进行改造,在实际运行情况的基础上,对MBR和接触氧化工艺在工艺流程、处理效果、投资成本和运行维护管理等方面进行比较,结果表明,MBR在各方面均体现出较强的优势,为MBR的实际应用和发展提供参考。     

Treatment of slaughterhouse plant wastewater by using a membrane bioreactor

The use of a membrane bioreactor (MBR) for removal of organic substances and nutrients from slaughterhouse plant wastewater was investigated. The chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) concentrations of slaughterhouse wastewater were found to be approximately 571 mg O2/L, 102.5 mg/L, and 16.25 mg PO4-P/L, respectively. A submerged type membrane was used in the bioreactor. The removal efficiencies for COD, total organic carbon (TOC), TP and TN were found to be 97, 96, 65, 44% respectively. The COD value of wastewater was decreased to 16 mg/L (COD discharge standard for slaughterhouse plant wastewaters is 160 mg/L). TOC was decreased to 9 mg/L (TOC discharge standard for slaughterhouse plant wastewaters is 20 mg/L). Ammonium, and nitrate nitrogen concentrations of treated effluent were 0.100 mg NH4-N/L, and 80.521 mg NO3-N/L, respectively. Slaughterhouse wastewater was successfully treated with the MBR process.     

Integration of performance,molecular biology and modeling to describe the activated sludge process

To study process performance and population dynamics in activated sludge, a pilot-scale Membrane Bioreactor (MBR) was installed in a municipal wastewater treatment plant (Aubergenville, France). Since no solids losses occur in the MBR effluent, the sludge residence time (SRT) can be: i) easily controlled by means of the sludge withdrawal, and ii) dissociated from the hydraulic residence time (HRT). A complete characterization of this activated sludge system was performed at three sludge ages (5, 10 and 20 days). Raw and treated wastewater quality, as well as sludge concentration, was analyzed, nucleic probe analysts was performed to determine the heterotrophic and nitrifier populations, and the results were compared to the output from a multispecies model that integrates substrate removal kinetics and soluble microbial products (SMP) production/consumption. This paper presents an integrated analysis of the activated sludge process based on chemical, molecular biology, and mathematical tools. The model was able to describe the MBR system with a high degree of accuracy, in terms of COD removal and nitrification, as well as sludge production and population dynamics through the ratio of active nitrifters/bacteria. Both steady-state and transient conditions could be described accurately by the model, except for technical problems or sudden variations in the wastewater composition.     

Membrane bio-reactor for textile wastewater treatment plant upgrading.

Textile industries carry out several fiber treatments using variable quantities of water, from five to forty times the fiber weight, and consequently generate large volumes of wastewater to be disposed of. Membrane Bio-reactors (MBRs) combine membrane technology with biological reactors for the treatment of wastewater: micro or ultrafiltration membranes are used for solid-liquid separation replacing the secondary settling of the traditional activated sludge system. This paper deals with the possibility of realizing a new section of one existing WWTP (activated sludge + clariflocculation + ozonation) for the treatment of treating textile wastewater to be recycled, equipped with an MBR (76 l/s as design capacity) and running in parallel with the existing one. During a 4-month experimental period, a pilot-scale MBR proved to be very effective for wastewater reclamation. On average, removal efficiency of the pilot plant (93% for COD, and over 99% for total suspended solids) was higher than the WWTP ones. Color was removed as in the WWTP. Anionic surfactants removal of pilot plant was lower than that of the WWTP (90.5 and 93.2% respectively), while the BiAS removal was higher in the pilot plant (98.2 vs. 97.1). At the end cost analysis of the proposed upgrade is reported.     

The removal of residual organic matter from biologically treated swine wastewater using membrane bioreactor process with powdered activated carbon.

The objective of this study was to characterize the mechanisms of the COD removal in the membrane bioreactor (MBR) process with powdered activated carbon (PAC) addition and to determine its optimal operation, for the removal of residual organic matters (ROM) from biologically treated swine wastewater. The MBR process with PAC showed higher removal efficiency of chemical oxygen demand (COD(Mn)) than that without PAC. When the average COD(Mn) concentration of the influent was 217 mg/L, the average COD(Mn) concentration of the permeate from the MBR with PAC was about 41.5 mg/L, indicating an approximate removal efficiency of 81%. On the other hand, the average COD(Mn) concentration of the permeate from the MBR without PAC was 172 mg/L. The PAC dosage estimated to obtain the above removal efficiency was about 0.74 g per litre of influent. Among the total residual organics removed by PAC-added MBR, 46.5% was removed by PAC adsorption, 20.8% by biodegradation, 4.4% by membrane separation, and 9.3% by enhanced microorganism activity. From these results, the MBR process with PAC was considered as a very useful treatment process for the reduction of COD(Mn) in biologically treated swine wastewater.     

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。