基于純膜MBBR的BioFIMag®工藝用于新建污水廠
周家中,韓文杰,蘇丹丹,劉宜龍,苑廣耀,殷建文,吳迪
(青島思普潤水處理股份有限公司,山東 青島,266510)
摘要:肇慶市某新建污水處理廠設計處理規(guī)模3×104m3/d,出水需滿足《城鎮(zhèn)污水處理廠綜合排放標準》(GB18918-2002)一級A標準。采用基于純膜MBBR的BioFIMag®工藝解決了項目占地緊張、施工周期短的問題。通過高密度生物膜區(qū)、強化膜水分離區(qū)并加載智能控制系統(tǒng)確保項目出水水質穩(wěn)定達標及污水廠精準運行。工程實施后該污水處理廠實際占地僅為0.067 m2/(m3·d-1)。僅用時30d即完成項目的設計、施工和調試,出水COD、NH4+-N、TP、SS分別為13.07mg/L、1.47mg/L、0.26 mg/L、2.83mg/L,優(yōu)于一級A標準。該項目運行電耗0.203 kW·h/t。除磷混凝劑采用PAC,投加的Al/去除的TP的摩爾比為2.1。直接運行費用0.168元/t。BioFIMag®工藝具有極限占地、極限處理、超快實施、經(jīng)濟節(jié)約、管理簡便等優(yōu)勢,適用于應急污水處理項目的實施。
關鍵詞:純膜MBBR;生物膜;極限占地;一級A
Application of BioFIMag Pure MBBR in New Emergency Wastewater Treatment Plant
ZHOU Jia-zhong, HAN Wenjie,SU Dan-dan,LIU Yi-long, YUAN Guang-yao, YING Jian-wen, WU Di*
(Qingdao SPRING Water Treatment Co.,Ltd, Qingdao 266510, China)
Abstract:The design treatment capacity of an wastewater treatment plant in Zhaoqing city is 3×104m3/d, the effluent quality should reach the first level A criteria of “Discharge standard of pollutants for municipal wastewater treatment plant” (GB 18918-2002). The application of BioFIMag® process solves the problems of compact land occupation and short construction period of the project. Through high-density biofilm area, enhanced membrane water separation area and loading intelligent control system, the effluent quality is stable up to the standard of level A and the sewage treatment plant can realiezed the accurate operation. After the implementation of the project, the actual land occupation of the WWTP is only 0.067 m2/(m3·d-1). It take only 30 days to complete the design, construction and commissioning of the project. The effluent COD、NH4+-N、TP、and SS are (13.07mg/L、1.47mg/L、0.26mg/L、2.83mg/L, respectively, which are better than first level A criteria. The power consumption of the project is 0.203 kW·h/t. PAC is used as coagulant for phosphorus removal, and the molar ratio of Al added to TP removed is 2.1. The direct operation cost is 0.168 yuan/t. The BioFIMag® process has the advantages of limited land occupation, extreme treatment, ultra fast implementation, economic saving and simple management, which is suitable for the implementation of emergency wastewater treatment project.
Keywords: Pure MBBR; Biofilm; Limit land occupation; First level A criteria
1 項目簡介
廣東省肇慶市某城區(qū)在污水管網(wǎng)改造后,污水處理流量大幅度升高,但與之配套的污水處理廠面臨著進水容納能力不足的問題,從而使得約有3×104m3/d的污水無法進行有效處理。所以針對3萬t/d的污水處理缺口,急需建設污水處理廠,以實現(xiàn)污水達標排放。該污水處理廠位于肇慶市某污水處理廠廠內預留地,占地面積為2000m2,設計污水處理規(guī)模為3×104m3/d,其出水主要水質指標COD、NH4+-N、SS和TP等執(zhí)行國家《城鎮(zhèn)污水處理廠污染物排放標準》(GB 18918-2002 )中的一級A標準,設計進出水水質見表1。
表1. 設計進出水水質(mg/L)
Tab.1 Design water quality of inffluent and effluent
指標 |
CODcr |
SS |
NH4+-N |
TP |
設計進水 |
250 |
200 |
30 |
4.0 |
設計出水 |
50 |
10 |
5(8) |
0.5 |
本項目主要面臨以下困難:1)實施周期短:為保障廢水能到及時有效的處理,該項目需要在60d之內完成設計、施工和通水達標,實施時間較短;2)占地極限受限:該項目所提供的建設用地如圖1所示,其中紅色線框內為可用土體,面積僅為2000m2(100m×20m),且呈狹長區(qū)間分布,不僅需要將所有工藝構筑物布置于此,還需進行合理的平面布置;3)工藝運行穩(wěn)定性要求高:雖然本項目核心污染物指標如COD、NH4+-N、TP、SS等僅需要達到《城鎮(zhèn)污水處理廠污染物排放標準》(GB 18918-2002)中的一級A標準,但由于實施周期短和占地受限,故對于工藝運行穩(wěn)定性要求更高。