基于响应面法优化污水厂脱氮工艺研究

doi:10.16088/j.issn.1001-6600.2020091401

Abstract

Abstract: Taking the phase II denitrification operation process of a joint sewage plant in Xinjiang as the research subjects, the response surface method (RSM) was applied to study the influence of sewage influent quality, sludge discharge amount, dosage, sludge reflux ratio, etc. on effluent total nitrogen (TN) and optimize its operating parameters. The experimental results showed that, from the perspective of effluent water quality, the optimal ranges of the influent carbon-nitrogen ratio (C/N), carbon-phosphorus ratio (C/P) and organic load (F/M) were 8.00-9.00, 55.00-60.00 and 0.09-0.10 d^-1, respectively, which is conducive to the nitrification reduction of the system; under the additional factors, the optimal ranges for the amount of sludge, dosage and internal reflux ratio (R) were 0.165-0.170 kg/m³, 14.00-16.00 mg/L and 43.00%-45.00%, respectively, with the best denitrification effect of system. Combined with the mathematical model of nitrogen loss and transfer, it is known that the quality factors of effluent water C/N and F/M had a greater impact on the system load. Therefore, it is helpful to optimize the removal effect of total nitrogen in waste-water by the denitrification unit of the sewage plant when the various influencing factors are kept in the optimal range.

Key words: combined sewage plant, response surface method, nitrogen balance model, total nitrogen removal rate

CLC Number:

X703

XIAO Fei, DONG Wenming, WANG Weihong. Optimization of Wastewater Containing Nitrogen in Wastewater Treatment Plant Based on Response Surface Methodology[J].Journal of Guangxi Normal University(Natural Science Edition), 2021, 39(5): 210-221.

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Optimization of Wastewater Containing Nitrogen in Wastewater Treatment Plant Based on Response Surface Methodology

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