青島某全地下污水處理廠設(shè)計(jì)規(guī)模為4×10⁴ m³/d，廠區(qū)占地為1.31 hm²，采用曝氣除油沉砂池+精細(xì)格柵+生物池 +MBR 工藝。進(jìn)水以生活污水為主，設(shè)計(jì)出水水質(zhì)同時(shí)滿足《城鎮(zhèn)污水處理廠污染物排放標(biāo)準(zhǔn)》（GB 18918—2002）一級A標(biāo)準(zhǔn)、《城市污水再生利用 景觀環(huán)境用水水質(zhì)》（GB/T 18921—2002）中的娛樂性景觀環(huán)境用水標(biāo)準(zhǔn)、《青島市環(huán)境保護(hù)局關(guān)于明確2015年省控河流斷面水質(zhì)改善目標(biāo)的函》中相關(guān)要求。廠區(qū)用地面積較小且呈不規(guī)則狀，為保證生物池水力停留時(shí)間滿足處理要求，本次設(shè)計(jì)生物池有效水深為8.5 m。實(shí)際運(yùn)行表明，出水水質(zhì)完全達(dá)到了設(shè)計(jì)目標(biāo)，其設(shè)計(jì)經(jīng)驗(yàn)可供其他類似工程參考。

The design scale of an underground MBR wastewater treatment plant in Qingdao was 4×10⁴ m³/d with the area coverage of 1.31 hm². The combination treatment process of aeration oil removal sedimentation tank+fine grille+biological treatment tank+MBR was adopted. Domestic sewage was the main part of influent. The design effluent quality was required to meet the relevant requirements of the first class A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), the recreational landscape environment water standard in the Reuse of Urban Recycling Water—Water Quality Standard for Scenic Environment Use (GB/T 18921-2002), and the Letter of Qingdao Environmental Protection Bureau on Clarifying the Water Quality Improvement Target of Provincial River Section in 2015. The land of the plant was small and irregular. In order to ensure the sufficient hydraulic retention time of the biological tank for the treatment requirements, the effective depth of the biological tank in this design was 8.5 m. The actual operation showed that the effluent quality had completely reached the design goal. Its design experience could be used as a reference for other similar projects.