期刊
BIORESOURCE TECHNOLOGY
卷 169, 期 -, 页码 596-604出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.07.050
关键词
Constructed wetland; Algal biofilm; Nutrient removal; Free-surface; Green solution
资金
- Department of Science and Technology, Ministry of Science and Technology, Government of India, New Delhi
- New INDIGO ERA NET [Indigo-DST-019 REWATER]
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. (C) 2014 Elsevier Ltd. All rights reserved.
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