Pretreatment of poultry waste anaerobic digested effluents by chitosan flocculation for Chlorella pyrenoidosa growth and pollutants removal

文献类型： 外文期刊

第一作者： Wu, Yu

作者： Wu, Yu;Zhang, Hong;Wu, Yu;Wang, Mengzi;Cao, Wei;Liu, Zhidan;Lu, Haifeng

作者机构：

关键词： Microalgae;Poultry anaerobic digested effluents;Nutrient removal;Chitosan;Flocculation

期刊名称：DESALINATION AND WATER TREATMENT （ 影响因子：1.254； 五年影响因子：1.553 ）

ISSN： 1944-3994

年卷期： 2017 年 77 卷

页码：

收录情况： SCI

摘要： Poultry waste anaerobic digested effluents are biorefractory for microalgal cultivation. Hence, proper pretreatment is required to improve the conditions of digested effluent and enable the microalgal cultivation. This study evaluated the efficiency of nutrient removal in the digested effluents by pretreatment of chitosan flocculation and determined the potential of pretreated effluents to cultivate Chlorella pyrenoidosa. Approximately 82.1% of chemical oxygen demand, 91.6% of turbidity, and 99.3% of color in the digested effluents (without pH adjustment) were removed by chitosan flocculation (dissolved in hydrochloric acid) at an optimum chitosan concentration of 1.65 g/L. The maximum biomass production of 0.719 g/L and chlorophyll-a content of 13.71 mg/L were obtained from C. pyrenoidosa Y3 cultured for 20 d in the flocculated effluent at the optimum chitosan concentration. NH4-N in the pretreated effluent decreased significantly by 77.2%. However, total phosphorus was reduced by algae to a certain extent (19.5%). Overall, the results indicate that chitosan flocculation is a feasible pretreatment to improve decontamination and algal biomass yield.

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