杜創(chuàng)1，雷振2，張鐵源3
（1.合肥市地下管網(wǎng)建設(shè)管理辦公室，合肥，230031；2.賽萊默（中國）有限公司，上海，200051；3.賽萊默水處理（齊利諾普爾）有限公司，美國，16063）
摘要：合肥市某污水處理廠設(shè)計排放主要指標(biāo)需達(dá)到地表水環(huán)境質(zhì)量Ⅳ類標(biāo)準(zhǔn)。該項目深度單元處理采用Leopold elimi-NITE®反硝化深床濾池工藝，兼顧了過濾，反硝化脫氮及除磷功能，使污水廠出水穩(wěn)定達(dá)到TN＜5mg/l，TP＜0.3mg/l，SS＜10mg/l。深床濾池設(shè)計采用弧形堰、恒液位控制及“前饋+后饋” 精確碳源投加控制方式，力求最經(jīng)濟(jì)的碳源投加量。
關(guān)鍵詞：類Ⅳ類水；elimi-NITE®深床濾池；碳源投加控制
The Application of Deep Bed Filter in WWTP Upgrading to Meet Near Surface Water Class IV Standards
Chuang Du1, Lei Zhen2, Zhang Tieyuan3
(1.Hefei City Underground Pipe Network Construction Administration Office, Hefei, 230000; 2. Xylem (China) Co. Ltd, Shanghai, 200051; 3. Xylem Water Solutions Zelienople LLC, Zelienople, PA 16063)
Abstract: He Fei City Economic Development Zone WWTP Phase Ⅲ Project is designed to improve discharge qualities comply with Surface Water Environment Quality Class IV Standard (TN≤5mg/l). The Leopold elimi-NITE® denitrification deep-bed filter, which is a combination of filtration, denitrification and dephosphorization processes, has been applied as advanced treatment to ensure the effluent of SS<10mg/L, TN＜5mg/L and TP＜0.3mg/L. The deep bed filter design has considered curve weir, constant level control for better filter operation. In addition, an advanced Carbo dose control system with forward & backward was incorporated to achieve economical carbon usage.
Key words: Surface Water Class IV Standards, elimi-NITE® Deep-Bed Filter, Carbon Source Dosage Control
污水廠已建成污水處理規(guī)模20萬m3/d（每期規(guī)模為10×104m3/d），現(xiàn)階段執(zhí)行一級A排放標(biāo)準(zhǔn)，近期將對一期、二期工程進(jìn)行提標(biāo)改造，將污水排放標(biāo)準(zhǔn)提高到主要指標(biāo)達(dá)到地表水環(huán)境質(zhì)量Ⅳ類標(biāo)準(zhǔn)。污水處理廠三期工程設(shè)計規(guī)模為10×104m3/d，出水設(shè)計值在達(dá)到《城鎮(zhèn)污水處理廠污染物排放標(biāo)準(zhǔn)》（GB18918-2002）一級A標(biāo)準(zhǔn)的基礎(chǔ)上，要求總磷、總氮、氨氮、化學(xué)需氧量4項主要指標(biāo)濃度值分別不高于0.3、5、1.5、30mg/L，主要指標(biāo)達(dá)到地表水環(huán)境質(zhì)量Ⅳ類標(biāo)準(zhǔn)（總氮≤5mg/L）。
