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 7):27-33.
Treatment of Food Waste Digestate by DMBR with Partial Nitrification and Denitrification
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
7 7
Page:
27-33
Column:
Date of publication:
2021-04-01
- Keywords:
- dynamic membrane bioreactor; food waste; digestate; partial nitrification and denitrification
- 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.
Last Update:
2021-04-01