引用本文: 張民安, 袁忠玲, 張明, 秦彥榮, 吳新波, 趙凱亮, 陳永志. 響應(yīng)面法優(yōu)化多級(jí)A/O+BAF系統(tǒng)處理生活污水強(qiáng)化脫氮除磷[J]. 環(huán)境科學(xué)研究, 2022, 35(5): 1233-1244. doi: 10.13198/j.issn.1001-6929.2021.12.23 shu

Citation: ZHANG Min'an, YUAN Zhongling, ZHANG Ming, QIN Yanrong, WU Xinbo, ZHAO Kailiang, CHEN Yongzhi. Optimizing Multi-Stage A/O+BAF System by Response Surface Methodology for Treating Domestic Sewage Enhance Nitrogen and Phosphorus Removal[J]. Research of Environmental Sciences, 2022, 35(5): 1233-1244. doi: 10.13198/j.issn.1001-6929.2021.12.23 shu

響應(yīng)面法優(yōu)化多級(jí)A/O+BAF系統(tǒng)處理生活污水強(qiáng)化脫氮除磷

doi: 10.13198/j.issn.1001-6929.2021.12.23

張民安1, 2, 3, ,  袁忠玲1, 2, 3,  張明1, 2, 3,  秦彥榮1, 2, 3,  吳新波1, 2, 3,  趙凱亮1, 2, 3,  陳永志1, 2, 3, , 

1.

蘭州交通大學(xué)，甘肅省黃河水環(huán)境重點(diǎn)實(shí)驗(yàn)室，甘肅 蘭州　730070

 

2.

蘭州交通大學(xué)環(huán)境與市政工程學(xué)院，甘肅 蘭州　730070

 

3.

甘肅省污水處理行業(yè)技術(shù)中心，甘肅 蘭州　730070

 

基金項(xiàng)目: 甘肅省科技計(jì)劃項(xiàng)目(No.20JR2RA002)；甘肅省黃河水環(huán)境重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(No.21YRWEK006)；甘肅省青年科技基金計(jì)劃項(xiàng)目(No.20JR5RA075)

詳細(xì)信息

Optimizing Multi-Stage A/O+BAF System by Response Surface Methodology for Treating Domestic Sewage Enhance Nitrogen and Phosphorus Removal

ZHANG Min'an1, 2, 3 ,  ,  YUAN Zhongling1, 2, 3 ,  ZHANG Ming1, 2, 3 ,  QIN Yanrong1, 2, 3 ,  WU Xinbo1, 2, 3 ,  ZHAO Kailiang1, 2, 3 ,  CHEN Yongzhi1, 2, 3 , , 

1.

Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China

 

2.

School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

 

3.

Technical Center of Sewage Treatment Industry in Gansu, Lanzhou 730070, China

 

Funds: Science and Technology Program of Gansu Province，China (No.20JR2RA002)；Open Foundation of Key Laboratory of Yellow River Water Environment in Gansu Province，China (No.21YRWEK006)；Youth Science and Technology Fund Program of Gansu Province，China (No.20JR5RA075)

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摘要: 為優(yōu)化多級(jí)A/O(缺氧/好氧)＋BAF(曝氣生物濾池)系統(tǒng)處理低C/N生活污水強(qiáng)化脫氮除磷的關(guān)鍵運(yùn)行條件，采用單因素試驗(yàn)分別研究了HRT(水力停留時(shí)間)、三點(diǎn)進(jìn)水比例及BAF填料高度對(duì)系統(tǒng)主要污染物去除的影響，并以此為對(duì)照，通過(guò)BBD二階模型中心復(fù)核設(shè)計(jì)多因素試驗(yàn)，采用響應(yīng)面法分析上述三因素對(duì)TN、TP去除的交互影響，得出了優(yōu)化運(yùn)行條件與TN、TP去除率的模型預(yù)測(cè)值，在該條件下運(yùn)行系統(tǒng)，驗(yàn)證了TN、TP去除率實(shí)際值與預(yù)測(cè)值的相對(duì)誤差. 結(jié)果表明：①單因素試驗(yàn)表明，當(dāng)HRT為9 h、進(jìn)水比例為5∶3∶2、填料高度為1 800 mm時(shí)，多級(jí)A/O+BAF系統(tǒng)中主要污染物的去除效果最好. ②響應(yīng)面分析得出，三因素對(duì)TN、TP的去除交互影響顯著；模型擬合回歸方程得出，優(yōu)化運(yùn)行條件為HRT 8.5 h、進(jìn)水比例5∶3∶2、填料高度1 600 mm時(shí)，TN、TP去除率預(yù)測(cè)值分別為84.88%、94.37%. ③驗(yàn)證結(jié)果表明，進(jìn)水ρ(TN)、ρ(TP)平均值分別為68.8、5.4 mg/L，出水ρ(TN)、ρ(TP)平均值分別為10.61、0.32 mg/L，TN、TP實(shí)際去除率分別為84.15%、94.01%，與TN、TP去除率預(yù)測(cè)值相比，相對(duì)誤差僅分別為0.86%、0.38%. 研究顯示，應(yīng)用響應(yīng)面法建立模型優(yōu)化多級(jí)A/O＋BAF工藝處理生活污水的方法可靠，實(shí)現(xiàn)了對(duì)氮磷的強(qiáng)化去除.

 

 

關(guān)鍵詞: 多級(jí)A/O+BAF /  響應(yīng)面法 /  多因素交互 /  模型預(yù)測(cè) /  生活污水 

Abstract: This study aim to realize the enhanced removal of nitrogen and phosphorus in the treatment of low C/N ratio domestic sewage, by optimizing the key operation conditions of an integrated process of the multi-stage A/O (anoxic/oxic) + BAF (biological aerated filter). Single factor experiments were conducted to study the effects of HRT (hydraulic retention time), three-point inlet water ratio and BAF packing height on the removal of maior pollutants in the system, furthermore, by BBD second-order mode center review to design multi-factor experiment. The response surface methodology was used to analyze the interactive influence of the above three factors on TN (total nitrogen) and TP (total phosphorus) removal, so as to obtain the optimal operation conditions of the system and the predicted removal rates of the model, based on those conditions, run a parallel experiment to verify the relative error between the actual value of TN and TP removal rate and the predicted value. The results showed that: (1) In the single factor experiment, the conditions for the optimum removal effect of main pollutants in the system were HRT 9 h, inlet water ratio 5:3:2 and packing height 1800 mm. (2) By analyzing the response surface, it is indicated that the three factors have significant interaction influence on the removal of TN and TP. According to the regression equation fitted by the model, the optimal operating conditions were: HRT 8.5 h, inlet water ratio 5:3:2, and packing height 1600 mm, and the predicted removal rates of TN and TP were 84.88% and 94.37%. (3) The results of verification show that the average concentrations of TN and TP in influent were 68.8 and 5.4 mg/L, and in effluent were 10.61 and 0.32 mg/L, respectively, and the corresponding actual removal rates were 84.15% and 94.01%, respectively. Comparing the actual values with the predicted values of TN and TP removal rates, the relative errors were only 0.86% and 0.38%. The research shows that the application of the response surface methodology to model and optimize the multi-stage A/O+BAF process of domestic sewage treatment was reliable and enhanced removal of nitrogen and phosphorus.

 

 

Key words: multi-stage A/O+BAF /  response surface methodology /  multi-factor interaction /  model-predictive /  domestic sewage