Analysis of COD, N and P in denitrifying phosphorus removal under multivariate condition

WANG Cong; WANG Shuying; ZHANG Miao; PENG Yongzhen; ZENG Wei

doi:10.11949/j.issn.0438-1157.20141549

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Analysis of COD, N and P in denitrifying phosphorus removal under multivariate condition

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- Analysis of COD, N and P in denitrifying phosphorus removal under multivariate condition
- CIESC Journal Issue 4, Pages: 1467-1475(2015)
- 作者机构：
  
  北京工业大学北京市污水脱氮除磷处理与过程控制工程技术研究中心, 北京市水质科学与水环境恢复工程重点实验室,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141549
  CLC： 703
- Online First：05 April 2015，
  
  Published：05 April 2015
- 稿件说明：
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WANG Cong, WANG Shuying, ZHANG Miao, et al. Analysis of COD, N and P in denitrifying phosphorus removal under multivariate condition[J]. CIESC Journal, 2015, (4): 1467-1475.
DOI：

WANG Cong, WANG Shuying, ZHANG Miao, et al. Analysis of COD, N and P in denitrifying phosphorus removal under multivariate condition[J]. CIESC Journal, 2015, (4): 1467-1475. DOI： 10.11949/j.issn.0438-1157.20141549.

摘要

以A2O-生物接触氧化(BCO)工艺系统反硝化除磷活性污泥为研究对象

应用Central Composite Design(CCD)设计考察了起始COD浓度、硝酸盐氮浓度、反应温度和缺氧反应时间对反硝化除磷反应的3个响应值COD去除率(Ycod)、N去除率(Yn)和P去除率(Yp)的影响。结果表明

起始COD对反硝化除磷反应中COD、N和P的去除都有重要影响

且缺氧反应时间对Yn有较大影响

反应温度对Yp有很大影响;3个响应值的模型方程均显著

R2分别为0.9853、0.9118和0.9972;当COD为316.95 mg·L-1、硝酸盐氮为42.26 mg·L-1、反应温度为27.19℃、缺氧反应时间为237.37 min时

Ycod、Yn和Yp的模型预测值分别为93.54%、99.96%和99.56%

试验响应值分别为92.03%、91.15%和81.64%

Abstract

The optimal removal efficiencies of COD

N and P were investigated by using denitrifying phosphorus activated sludge taken from an anaerobic/anoxic/oxic (A2O)-biological contact oxidation (BCO) system. Response surface methodology using Central Composite Design (CCD) of Design-Expert was used to evaluate the influence and specific function of four important factors (initial COD concentration

nitrate concentration

temperature and anoxic reaction time) on the three responses

which were marked removal rate of COD

N and P as Ycod

Yn and Yp

respectively. Among all the factors

initial COD concentration greatly influenced the three responses. In addition

anoxic reaction time had a major impact on Yn and temperature had a greater influence on Yp than other two factors. The three response model equations were all significant

where R2 were 0.9853

0.9118 and 0.9972 respectively. When initial COD concentration

nitrate concentration

temperature and anoxic reaction time were 316.95 mg·L-1

42.26 mg·L-1

27.19℃

and 237.37 min respectively

the model predictions of Ycod

Yn and Yp were 93.54%

99.96% and 99.56%

and test responses were 92.03%

91.15% and 81.64%

respectively.

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