The risks posed by algal blooms caused by nitrogen and phosphorus in reclaimed water used in urban water landscapes need to be carefully controlled.In this study,the combined effects of the nitrogen and phosphorus concentrations and the light intensity and temperature on the specific growth rates of algae were determined using Monod,Steele,and Arrhenius models,then an integrated algal growth model was developed.The algae biomass,nitrogen concentration,and phosphorus concentration mass balance equations were used to establish a new control model describing the nitrogen and phosphorus concentration and hydraulic retention time thresholds for algal blooms.The model parameters were determined by fitting the models to data acquired experimentally.Finally,the control model and numerical simulations for six typical algae and mixed algae under standard conditions were used to determine nitrogen/phosphorus concentration and hydraulic retention time thresholds for landscape water to which reclaimed water is supplied(i.e.,for a reclaimed water landscape).

Keying Song;Shufeng Zhu;Yun Lu;Guohua Dao;Yinhu Wu;Zhuo Chen;Shengnan Wang;Junhan Liu;Wenguang Zhou;Hong-Ying Hu

Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protection Key Laboratory of Microorganism Application and Risk Control(SMARC),School of Environment,Tsinghua University,Beijing 100084,China;Beijing Laboratory for Environmental Frontier Technologies,Beijing 100084,China;Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China;Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,and School of Resources,Environmental&Chemical Engineering,Nanchang University,Nanchang 330031,China;Research Institute for Environmental Innovation(Suzhou)Tsinghua,Jiangsu,Suzhou 215163,China

环境科学与工程前沿

[1]Keying Song;Shufeng Zhu;Yun Lu;Guohua Dao;Yinhu Wu;Zhuo Chen;Shengnan Wang;Junhan Liu;Wenguang Zhou;Hong-Ying Hu-.Modelling the thresholds of nitrogen/phosphorus concentration and hydraulic retention time for bloom control in reclaimed water landscape)[J].环境科学与工程前沿,2022(10):53-63

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