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首页> 外文期刊>Fresenius Environmental Bulletin >TREATMENT OF MUNICIPAL WASTEWATER USING EXTENDED AERATION-ULTRAFILTRATION PROCESS IN A SUBMERGED MEMBRANE BIOREACTOR
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TREATMENT OF MUNICIPAL WASTEWATER USING EXTENDED AERATION-ULTRAFILTRATION PROCESS IN A SUBMERGED MEMBRANE BIOREACTOR

机译：浸没式膜生物反应器中扩展的曝气-超滤工艺处理市政污水

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A pilot-scale submerged membrane bioreactor (SMBR) with flat sheet ultrafiltration module was used to treat a municipal wastewater. Permeate extraction was carried out intermittently under a suction pressure in the range of 0.1-0.5 bar. The module was aerated from below the ultrafiltration module to provide cross-flow effect and oxygen requirement for the biological process. Active sludge from municipal wastewater treatment plant (WWTP) of Kayseri (Turkey) was used in the start-up with a food/ microorganism (F/M) ratio of about 0.15, which later changed between 0.05 and 0.2 during 170-day operation, and then increased up to 0.34 at the end of operation. This system worked throughout a 355-day operational period without any sludge extraction. The influent COD ranged between 524-983 mg L~(-1) during the study. Mixed liquor suspended solids (MLSS) concentration in aeration (oxic) tank of the submerged membrane bioreactor (SMBR) was changed between 3600-7400 mg L~(-1) during 170-day operation, and finally decreased to 2300 mg L~(-1) at day 355. The removal efficiency of COD was more than 99%. Influent and effluent pH values in the SMBR also changed between 7.3-8.4.
机译：具有平板超滤模块的中试浸没式膜生物反应器（SMBR）用于处理市政废水。在0.1-0.5巴范围内的抽吸压力下间歇地进行渗透物提取。从超滤模块下方对模块充气，以提供错流效应和生物过程所需的氧气。开塞利（土耳其）市政污水处理厂（WWTP）的活性污泥用于启动时，食品/微生物（F / M）比率约为0.15，随后在170天运行期间在0.05到0.2之间变化，然后在操作结束时增加到0.34。该系统在整个355天的运行时间内都可以正常工作，没有任何污泥的提取。在研究过程中，进水COD的范围为524-983 mg L〜（-1）。在170天的运行期间，浸入式膜生物反应器（SMBR）的曝气（氧气）槽中的混合液悬浮固体（MLSS）浓度在3600-7400 mg L〜（-1）之间变化，最终降至2300 mg L〜（ -1）在第355天。COD的去除效率超过99％。 SMBR中的进水和出水pH值也在7.3-8.4之间变化。

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