XIA Yi-fan,WANG Bing-jie,TU Ling-bo,et al.Treatment of Food Waste Digestate by DMBR with Partial Nitrification and Denitrification[J].China Water & Wastewater,2021,37(7):27-33.
DMBR短程硝化反硝化處理餐廚垃圾厭氧沼液
- Title:
- Treatment of Food Waste Digestate by DMBR with Partial Nitrification and Denitrification
- 關(guān)鍵詞:
- 動態(tài)膜生物反應(yīng)器; 餐廚垃圾; 厭氧沼液; 短程硝化反硝化
- Keywords:
- dynamic membrane bioreactor; food waste; digestate; partial nitrification and denitrification
摘要:- 以中空玻璃纖維編織管作為膜組件材料，自行設(shè)計制作了一套動態(tài)膜生物反應(yīng)器(DMBR)，研究了該裝置在短程硝化反硝化條件下對餐廚垃圾厭氧沼液的處理效果。結(jié)果表明，通過逐漸提高沼液比例并控制DO濃度為0.8~1.2 mg/L、溫度為35 ℃，可在16 d左右基本實(shí)現(xiàn)DMBR短程硝化反應(yīng)的啟動。系統(tǒng)穩(wěn)定運(yùn)行階段，當(dāng)進(jìn)水COD和NH+4-N濃度均值分別為6 944和650 mg/L、水力停留時間（HRT）為30 h時，COD、NH4+-N和TN去除率分別可達(dá)92%、92%和68%，COD和NH4+-N容積負(fù)荷分別達(dá)到5.13 kg/(m3·d)和0.48 kg/(m3·d)，NO2--N積累率穩(wěn)定在84%以上、最高值達(dá)到90.38%。經(jīng)處理后，餐廚垃圾厭氧沼液可穩(wěn)定達(dá)到納管標(biāo)準(zhǔn)，其溶解性微生物代謝產(chǎn)物熒光峰幾乎完全被去除，說明該工藝可顯著降解甚至完全去除類蛋白物質(zhì)。
Abstract:- A set of dynamic membrane bioreactor (DMBR) was designed and manufactured with hollow glass fiber braided tube as membrane module, and the treatment effect of the device on food waste digestate under the condition of partial nitrification and denitrification was investigated. Start-up of the partial nitrification of the DMBR could be achieved within about 16 days by gradually increasing the proportion of digestate and controlling the DO concentration between 0.8-1.2 mg/L and the temperature at 35 ℃. When the average COD and NH4+-N were 6 944 mg/L and 650 mg/L, and HRT was 30 h, the removal rates of COD, NH4+-N and TN were 92%, 92% and 68%, respectively, and the volumetric loads of COD and NH4+-N were 5.13 kg/(m3·d) and 0.48 kg/(m3·d), respectively. The accumulation rate of NO2--N was more than 84%, and the highest value was 90.38%. The concentration of the pollutants in the treated food waste digestate could meet the discharge standard for sewage entering into sewer network, and the fluorescence peak of the dissolved microbial metabolites was almost removed completely, which showed that the process could significantly degrade or even completely remove the protein-like substances.
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