Effects of Influent Algae Concentrations and Seasonal Variations on Pollutant Removal Performance in High-Rate Algae Ponds
Yi Ding 1, 2  
,   Xinshan Song 2,   Wei Wang 2,   Yuhui Wang 2  
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College of Ocean Science and Engineering, Center for Marine Environmental and Ecological Modelling, Shanghai Maritime University, Shanghai 201306, China
College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in the Textile Industry, Donghua University, Shanghai 201620, China
Yuhui Wang   

Donghua University, College of Environmental Science and Engineering, Donghua University, , Room 5153, Building No.4, 2999 North Renmin Road, Songjiang District, Shanghai 201620, China., 201620 Shanghai, China
Submission date: 2017-07-22
Final revision date: 2017-08-29
Acceptance date: 2017-09-03
Online publication date: 2018-02-20
Publication date: 2018-03-30
Pol. J. Environ. Stud. 2018;27(4):1901–1905
Algae can increase pH and dissolved oxygen via photosynthesis and affect the wastewater treatment performance of high-rate algae ponds (HRAPs). Nine laboratory-scale HRAPs divided into three groups were constructed to treat synthetic wastewater via six-month experiments. Higher algae concentrations in the influent of HRAPs effectively promoted the wastewater treatment performance. Seasonal variation had a significant impact on algal growth. Summer tests exhibited a higher reduction of pollutants than autumn tests. The high-influent algae concentration group in summer (HRAP-A) largely reduced the TN by 52.7±3.0%, TP by 90.3±1.0%, and dissolved chemical oxygen demand (DCOD) by 99.0±1.0%. It outperformed the low influent algae concentration group in summer (HRAP-B) and was significantly higher than the high influent algae concentration group in autumn (HRAP-C). The appropriate operation and design of HRAPs contributed to efficient wastewater treatments.