生物膜
水生植物
营养物
人工湿地
化学需氧量
水力停留时间
磷酸盐
环境科学
环境工程
环境化学
氨
藻类
化学
制浆造纸工业
废水
植物
生态学
生物
细菌
遗传学
有机化学
工程类
作者
Neha Badhe,Shaswati Saha,Rima Biswas,Tapas Nandy
标识
DOI:10.1016/j.biortech.2014.07.050
摘要
The role of algal biofilm in a pilot-scale, free-surface, up-flow constructed wetland (CW), was studied for its effect on chemical oxygen demand (COD), ammonia and phosphate removal during three seasons-autumn, winter and early spring. Effect of hydraulic retention time (HRT) was also investigated in presence and absence of algal biofilm. Principal Component Analysis was used to identify the independent factors governing the performance of CW. The study showed algal biofilm significantly improved nutrient removal, especially phosphate. Ammonia removal varied with HRT, biofilm and ambient temperature. Increase in biofilm thickness affected ammonia removal efficiency adversely. Algal biofilm-assisted COD removal compensated for reduced macrophyte density during winter. Two-way ANOVA test and the coefficients of dependent factors derived through multiple linear regression model confirmed role of algal biofilm in improving nutrient removal in CW. The study suggests that algal biofilm can be a green solution for bio-augmenting COD and nutrient removal in CW.
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