SUNShi-hao,PANGHong-tao,ZHANGLu-jing,et al.Design Calculation and Advantage Analysis of Multi-stage A/O Process with Equal Sludge Load and Unequal Volume[J].China Water & Wastewater,2024,40(14):85-94.
Click Copy

Design Calculation and Advantage Analysis of Multi-stage A/O Process with Equal Sludge Load and Unequal Volume

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第14期 Page: 85-94 Column: Date of publication: 2024-07-17
Author(s):
SUN　Shi-hao1;  PANG　Hong-tao1;  ZHANG　Lu-jing1;  JIANG　Le-yong1;  PENG　Yi2;  ZHANG　Liang3;  HOU　Feng1;  PENG　Yong-zhen3
（1. Xinkai Environment Investment Co. Ltd.， Beijing 101100， China； 2. Beijing Xintong Bishui Reclaimed Water Co. Ltd.， Beijing 101100， China； 3. National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology， Beijing University of Technology， Beijing 100024， China）
Keywords:
multi-stage A/O process;  influent distribution ratio;  reflux ratio;  total nitrogen removal efficiency;  sludge load;  carbon source;  short-cut nitrification and denitrification;  calculation formula
Abstract:
Multi-stage A/O has been applied in many engineering practices due to full use of the carbon source in raw water for denitrification. In this paper, the basic formulas for the nitrification and denitrification of multi-stage A/O are derived, and the calculation formulas are established based on the equal sludge load principal. The influence of various factors on the nitrification and denitrification is evaluated, and the ways to improve the efficiency of nitrogen removal are deduced. Based on equal sludge load principal, two design methods were established and analyzed, and a novel multi-stage A/O process with equal sludge load and unequal volume was developed, aimed to amplify the advantages in sludge concentration, weaken the inhibition effect of DO on denitrification, and overcome the difficulties of inlet distribution.
Last Update: 2024-07-17