Study on Biological Aerated Filter (BAF) of Algae-Contained Micropolluted Water

Wen Yi Zhang; Ning Han; Gang Yan; Xia Xu; Xiao Liang Chen

doi:10.4028/www.scientific.net/AMR.340.311

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 340Study on Biological Aerated Filter (BAF) of...

Study on Biological Aerated Filter (BAF) of Algae-Contained Micropolluted Water

Abstract:

Using NaCl modified zeolite with high specific surface area as filter media, algae-contained micropolluted water was treated with biological aerated filter (BAF) process. The removal efficiencies of the process on micro-pollutants and removal mechanism of algae-contained micropolluted water were investigated and studied. The results showed that better removal efficiency was obtained in turbidity, Chlorophyll-a, UV₂₅₄, and COD_Mnwhen algae-contained micropolluted water was treated by BAF. The optimal process parameters of the treatment of algae-contained micropolluted water with BAF were gases/water ratio of 0.5~2.5, backwash cycle of 3~5 d, air/water backwash strength of 5~7 L/(m²·s), air backwash strength of 13~17 L/(m²·s), backwash time of 15~20min, temperature of 25~30°C, pH value of 7.8~8.5 and hydraulic load of 0.23~0.35 m³/(m²·h). The results of continuous running for 21 days showed that the removal efficiency of turbidity, Chlorophyll-a, UV₂₅₄, and COD_Mn were up to 71.61%, 81.35%, 28.34% and 32.97% respectively under the conditions of these optimal parameters, and the effluent water could meet Grade II of the Drinking Water Quality Standards (CJ 3020~1993). This study could provide technical information for town water plant reconstruction of Taihu Lake and Chaohu Lake basin.

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Periodical:

Advanced Materials Research (Volume 340)

Pages:

311-317

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.340.311

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Online since:

September 2011

Authors:

Wen Yi Zhang, Ning Han, Gang Yan, Xia Xu, Xiao Liang Chen

Keywords:

Algae-Contained Micropolluted Water, Biological Aerated Filter (BAF), Chlorophyll-a, Microcystins, UV₂₅₄

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