MWH和圣地亚哥市的项目团队最近完成了一项为期12个月的项目 洛马角污水处理厂（San）的生物反应器（MBR）中试项目 加利福尼亚州迭戈）。这项由美国填海局资助的研究评估了四个 新开发的MBR系统最近可用于美国城市污水处理 集市试验系统（容量为5-20 gpm）在未经处理的城市污水上运行了一段时间 在平均流量和峰值流量条件下，目标周期为3500小时。企业的生产力 通过测量不同温度下跨膜压力（TMP）的增加来评估系统 恒定流量条件。还评估了每个系统满足第22篇水资源要求的能力 加州卫生部概述的膜系统回收标准 服务（CDH）。本研究的测试结果表明，新开发的MBR系统 在平均设计条件下，以300-1200小时的平均清洗间隔运行。在里面 此外，每个系统都能持续产生MBR预期的出水水质 城市污水处理技术（即BOD5<2 mg/L，氨<0.3 mg-N/L， 浊度<0.2 NTU，总大肠菌群<100 CFU/100 ml），并基于本研究的结果 获得CDHS的有条件批准。虽然总体而言，新的MBR系统 表现出良好的生产力和水质表现，表现出几项 由于膜完整性损失等问题，系统在试验期间退化， 机械故障和/或先导设计问题。MBR系统以最低或最低的成本运行 6天内峰值流量条件下的污垢；然而，水的比通量 淹没式MBR系统在峰值期间（即每天4小时）下降，而 外部MBR保持不变。新开发的MBR系统的成本估算显示 1 MGD容量回收系统的资本成本（K美元）在7990-9850美元之间，而 该产能的运维成本（K美元/年）在218美元至302美元之间。包括15个参考文献、表格和图表。

The project team of MWH and the City of San Diego recently completed a 12-month membrane bioreactor (MBR) pilot testing program at the Point Loma Wastewater Treatment Plant (San Diego, California). This U.S. Bureau of Reclamation funded study assessed the performance of four newly developed MBR systems recently available to the U.S. municipal wastewater treatment market. Pilot systems (capacities 5-20 gpm) were operated on raw municipal wastewater for a target period of 3,500 hours under average and peak flow conditions. The productivity of the systems was evaluated by measuring the increase in transmembrane pressure (TMP) under constant flux conditions. Each system was also evaluated for its ability to meet Title 22 Water Recycling Criteria for membrane systems as outlined by the California Department of Health Services (CDHS). Test results from this study showed the newly developed MBR systems operated with cleaning average intervals of 300 - 1200 hours under average design conditions. In addition each system consistently produced effluent water quality expected from MBR technology for municipal wastewater treatment (i.e. BOD5 < 2 mg/L, ammonia < 0.3 mg-N/L, turbidity < 0.2 NTU and total coliform < 100 CFU/100 ml) and based on results from this study were granted conditional approval by CDHS. Though overall the new MBR systems demonstrated good productivity and water quality performance, the performance of several of the systems degraded during the test period due to issues such as loss of membrane integrity, mechanical failures and/or pilot design issues. MBR systems operated with minimal or no fouling under peak flux conditions over a 6-day period; however, the specific flux of the submerged MBR systems decreased during peaking (i.e. 4 hours per day) while that of the external MBR remained constant. Cost estimates of the newly developed MBR systems revealed capital costs ($K) of 1 MGD capacity reclamation systems ranged from $7,990-9,850 while O&M costs ($K/year) for this capacity ranged $218-$302. Includes 15 references, tables, figures.