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首页> 外文会议>Water Environment Federation 75th annual technical exhibition amp; conference (WEFTEC 2002) >RECIPROCATING SUBSURFACE TREATMENT SYSTEM KEEPS AIRPORT OUT OF THE DEEP FREEZE
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RECIPROCATING SUBSURFACE TREATMENT SYSTEM KEEPS AIRPORT OUT OF THE DEEP FREEZE

机译：往复式地下处理系统可将机场保持在深冻状态

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ABX Air, Inc., the Airborne Express airline (ABX), operates a shipping service in Wilmington,rnOhio. During winter operations, chemical deicers are used to remove frozen materials fromrncritical aircraft surfaces. Following application, the deicers mix with storm water and arernconveyed to the airport’s storm sewer system. If the deicer-laden storm water is discharged tornthe local receiving streams, in-stream dissolved oxygen concentrations can decrease belowrnregulatory water quality standards. In January 2001, construction was completed on a stormrnwater collection and treatment system designed to treat the collected storm water usingrnreciprocating subsurface treatment cells. The system design was based upon a three-year pilotscalernstudy of the same technology. The reciprocating unit process consists of a pair of belowgradernlined cells containing gravel. A bacterial population forms on the gravel substrate,rnresulting in an attached-growth biological treatment system. The deicer food source, nutrients,rnand oxygen are supplied to the bacterial films through the reciprocation process. In thernreciprocation process, water is exchanged between the subsurface treatment cells every two tornfour hours, creating alternating states of submergence of the gravel in wastewater and exposurernof the gravel to atmospheric oxygen.rnThe full-scale treatment system at ABX consists of a series of the reciprocating subsurfacerntreatment cell pairs in parallel trains. Influent flows and CBOD5 concentrations, which can eachrnvary by two orders of magnitude, are managed through a detention and equalization system. Thernsystem started up in January 2001 and has operated for two deicing seasons. CBOD5 removalrnrates for the full-scale system have matched design levels, with influent CBOD5 concentrationsrnreduced by an average of 90% from influent concentrations as high as 3,500 mg/l. Effluentrnsuspended solids concentrations have been minimal.rnThe process has been proven to operate well at cold-water temperatures (as low as 34°F) , absorbrnshock loads well, maintain consistent degradation rates, produce low solids concentrations, andrnoperate without significant odor. The system has applications for any high strength wastewaterrnand can easily be designed to fit any size application.
机译：空中快运航空公司（ABX）的ABX Air，Inc.在俄亥俄州的威尔明顿市经营运输服务。在冬季运行期间，化学除冰剂用于从飞机的关键飞机表面清除冷冻物质。应用后，除冰剂与雨水混合并被输送到机场的雨水管道系统中。如果将装有除冰剂的雨水排到当地的接收溪流中，则溪流中溶解氧的浓度会降低到低于法定水质标准的水平。 2001年1月，雨水收集和处理系统的建设完成，该系统设计为使用往复式地下处理池处理收集的雨水。系统设计基于对相同技术的三年试点研究。往复单元过程由一对含砾石的低于分级线的单元组成。细菌种群在砾石基质上形成，导致附着生长的生物处理系统。通过往复过程将除冰的食物来源，营养素，氧气和氧气提供给细菌膜。在往复运动过程中，每隔两到四个小时在地下处理单元之间交换水，从而使砾石浸入废水中，并使砾石暴露于大气氧中，产生交替的状态。rnABX的全尺寸处理系统由一系列往复运动组成平行训练中的地下处理细胞对。进水流量和CBOD5浓度（可分别变化两个数量级）通过滞留和均压系统进行管理。 Thernsystem于2001年1月启动，已经运行了两个除冰季节。完整系统的CBOD5去除率与设计水平相匹配，进水CBOD5浓度从高达3500 mg / l的进水浓度平均降低了90％。悬浮液中的悬浮物浓度极低。已证明该方法在冷水温度（低至34°F）下运行良好，吸收力好，保持一致的降解速率，产生低的固体浓度，并且过硫酸盐无明显气味。该系统可用于任何高强度废水，并可轻松设计以适合任何规模的应用。

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