Removing nitrogen and phosphorus from simulated wastewater using algal biofilm technique |
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Authors: | Qun WEI Zhiquan HU Genbao LI Bo XIAO Hao SUN Meiping TAO |
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Institution: | (1) School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;(2) School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China;(3) State Key Laboratory of Freshwater Ecology and Biotechnology, Chinese Academy of Sciences, Wuhan, 430072, China |
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Abstract: | Algal biofilmtechnology is a new and advanced wastewater treatment method. Experimental study on removing nitrogen and phosphorus
from simulated wastewater using algal biofilm under the continuous light of 3500 Lux in the batch and continuous systems was
carried out in this paper to assess the performance of algal biofilm in removing nutrients. The results showed that the effect
of removing nitrogen and phosphorus by algal biofilm was remarkable in the batch system. The removal efficiencies of total
phosphorus (TP), total nitrogen (TN), ammonia-nitrogen (NH3-N), and chemical oxygen demand (COD) reached 98.17%, 86.58%, 91.88%, and 97.11%, respectively. In the continuous system,
hydraulic retention time (HRT) of 4 days was adopted; the effects of removing TP, TN, NH3-N, and COD by algal biofilm were very stable. During a run of 24 days, the removal efficiencies of TP, TN, NH3-N, and COD reached 95.38%, 83.93%, 82.38%, and 92.31%, respectively. This study demonstrates the feasibility of removing
nitrogen and phosphorus from simulated wastewater using algal biofilm. |
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Keywords: | biological treatment algal biofilm nitrogen phosphorus chemical oxygen demand (COD) |
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