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Volume 38 Issue 9
Nov.  2020
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2020  >  38(9): 31-35,42
LIU Dong, QI Junwen, XU Zunzhu, ZHANG Jiwen, JIN Xiaoxian, LI Jiansheng. ADSORPTION PERFORMANCE OF TOLUENE ON HYDROPHOBIC MODIFIED MOLECULAR SIEVES UNDER HIGH HUMIDITY[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 66-72,81. doi: 10.13205/j.hjgc.202302010
Citation: ZHENG Jun, ZHAO Meng-ke, ZHANG De-wei, ZHANG Ming-rui, WANG Meng-lin. START-UP OF A NEW MULTI-POINT INFLUENT A2/O PROCESS TO REMOVE NITROGEN AND PHOSPHORUS IN WASTEWATER WITH LOW CARBON TO NITROGEN RATIO[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 31-35,42. doi: 10.13205/j.hjgc.202009005
shu

START-UP OF A NEW MULTI-POINT INFLUENT A2/O PROCESS TO REMOVE NITROGEN AND PHOSPHORUS IN WASTEWATER WITH LOW CARBON TO NITROGEN RATIO

doi: 10.13205/j.hjgc.202009005

  • 1. Anhui University of Technology, Ma'anshan 243002, China;

  • 2. Anhui Huaqi Environmental Protection Technology Co., Ltd, Ma'anshan 243061, China;

  • 3. BAF Engineering Technology Research Center of Anhui Province, Ma'anshan 243061, China

  • Received Date: 2019-08-01
    Abstract
  • Aiming at solving the problems of the traditional A2/O process in treating wastewater with low C/N ratio and its low efficiency in nitrogen and phosphorus removal, a new multi-point-influent improvement A2/O process was proposed, and started with sludge inoculation. In the case of no additional carbon source, the actual domestic wastewater was used, and analysis on the start-up process of the membrane was conducted. The results showed that when the A2/O process was improved by sub-water feed, the filling rate of the suspended filler in the aerobic tank was 30%, and the DO was 1.5~3.0 mg/L, the start-up was completed in 21 days. Then the removal rates of COD, NH4+-N, TN and TP were 90.08%, 91.31% and 61.67% and 81.37%, respectively. This improved A2/O process by sub-water feed can overcome the limitation of carbon source shortage in the process of nitrogen and phosphorus removal. This new process realized the fast start-up and showed a higher treatment effect on nitrogen and phosphorus, and the water quality reached the Grade A standard of the Pollutant Discharge Standard for Urban Wastewater Treatment Plants (GB 18918-2002).
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