START-UP OF A NEW MULTI-POINT INFLUENT A<sup>2</sup>/O PROCESS TO REMOVE NITROGEN AND PHOSPHORUS IN WASTEWATER WITH LOW CARBON TO NITROGEN RATIO

ZHENG Jun; ZHAO Meng-ke; ZHANG De-wei; ZHANG Ming-rui; WANG Meng-lin

doi:10.13205/j.hjgc.202009005

Volume 38 Issue 9

Nov. 2020

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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

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

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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

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).
- multi-point water inflow,
- improved A²/O,
- wastewater with low carbon to nitrogen ratio,
- start-up,
- nitrogen and phosphorus removal

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References(18)

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