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高出水標準下的再生水廠COD深度處理工藝比選
- Title:
- Comparison and Selection of Advanced Treatment Process for COD Removal from Reclaimed Water Plants with High Effluent Quality
- 關鍵詞:
- font-size: 10pt; 再生水廠" style="text-decoration-line: none; color: rgb(48, 89, 220);">">再生水廠; 高出水標準; 臭氧催化氧化; 脈沖炭吸附池; 下向流炭吸附池; 活性焦吸附床
- Keywords:
- font-size: 10pt; reclaimed water plants" style="text-decoration-line: none; color: rgb(48, 89, 220);">">reclaimed water plants; high effluent quality; ozone catalytic oxidation; pulsed carbon adsorption tank; down- font-size: 10pt; flow carbon adsorption tank" style="text-decoration-line: none; color: rgb(48, 89, 220);">">flow carbon adsorption tank; activated coke adsorption bed
- 摘要:
- 北京市某再生水廠設計規模為8×104 m3/d，出水水質執行北京市地方標準《城鎮污水處理廠水污染物排放標準》（DB 11/890—2012）A標準。該廠采用多段進水A2O+MBR工藝作為主處理工藝，由于其出水COD很難穩定達到京標A標準的要求（COD≤20 mg/L），需增加COD深度處理單元。對目前可選擇的深度處理工藝——臭氧催化氧化、脈沖炭吸附、下向流炭吸附及活性焦吸附工藝就占地面積、投資、運行成本及工藝的實際應用情況進行了比較。結果表明,臭氧催化氧化工藝占地面積最小，脈沖炭吸附和下向流炭吸附工藝初期投資較低，活性焦吸附及下向流炭吸附工藝運行成本更低。臭氧催化氧化、脈沖炭吸附、活性焦吸附工藝均有實際應用案例。綜合考慮，最終確定脈沖炭吸附和活性焦吸附工藝是現階段較好的COD深度處理把關工藝。
- Abstract:
- The effluent of a reclaimed water plant in Beijing, with a design scale of 8 ×104 m3/d, implemented class A standard of Beijing local standard Discharge Standard of Water Pollutants for Municipal Wastewater Treatment Plants (DB 11/890-2012) (Beijing standard A). It was proposed to adopt multi-stage water inlet A2O+MBR process. Because it was difficult for the effluent COD to stably meet the requirements of the Beijing standard A(COD≤20 mg/L), advanced COD removal processing unit ought to be added. The theoretically feasible methods, such as the ozone catalytic oxidation, the pulsed carbon adsorption tank, the downflow carbon adsorption tank and the activated coke adsorption bed process, were compared in terms of land occupation, investment, operating cost and practical application of the process. The results showed that ozone catalytic oxidation covers the smallest area. The initial investment of the pulsed carbon adsorption tank and the downflow carbon adsorption tank was lower, and the operating cost of the activated coke adsorption bed and the down-flow carbon adsorption tank was lower. The ozone catalytic oxidation, the pulsed carbon adsorption tank, the active coke adsorption bed had practical application cases of the wastewater plant. Considering the above factors, it was concluded that the processes of pulsed carbon adsorption and activated coke adsorption were the better processes for COD removing advanced treatment at present.
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