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The Treatment of Decentralized Domestic Sewage in a Rural Area with a Vermibiofilter in Different Seasons


Affiliations
1 College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China
 

Aquatic plants were introduced in a Vermibiofilter (VBF) to form the artificial complex ecosystem constituted by plants, earthworms and microorganisms in the research. In addition to applying the pebbles, broken stones, coarse sand, fine sands and soil as the filter materials, Oenanthe javanica was utilized. With a hydraulic loading of 0.5 m3/(m2.d) and the density of earthworms being 12 g.L-1 in the soil, the treatment of the decentralized domestic sewage in a rural area using the VBF in different seasons was studied under the condition of intermittent water inflow. As demonstrated in the research results, the VBF shown the optimal treatment effect in the summer. The maximum removal rates of the VBF to CODMn, TN, NH4+-N and TP were 93.88%, 83.92%, 98.11% and 94.14% respectively. The contents of CODMn, TN and NH4+-N in the effluent water all reached the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) in China.

Keywords

Vermibiofilter, Domestic Sewage, Earthworms, Oenanthe javanica.
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  • The Treatment of Decentralized Domestic Sewage in a Rural Area with a Vermibiofilter in Different Seasons

Abstract Views: 184  |  PDF Views: 1

Authors

Yiping Zhao
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China
Deng Yu
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China
Fuquan Ni
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China
Manxue Zhang
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China
Yalin Zheng
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China
Wenli Wang
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China
Zhenyi Qiu
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, China

Abstract


Aquatic plants were introduced in a Vermibiofilter (VBF) to form the artificial complex ecosystem constituted by plants, earthworms and microorganisms in the research. In addition to applying the pebbles, broken stones, coarse sand, fine sands and soil as the filter materials, Oenanthe javanica was utilized. With a hydraulic loading of 0.5 m3/(m2.d) and the density of earthworms being 12 g.L-1 in the soil, the treatment of the decentralized domestic sewage in a rural area using the VBF in different seasons was studied under the condition of intermittent water inflow. As demonstrated in the research results, the VBF shown the optimal treatment effect in the summer. The maximum removal rates of the VBF to CODMn, TN, NH4+-N and TP were 93.88%, 83.92%, 98.11% and 94.14% respectively. The contents of CODMn, TN and NH4+-N in the effluent water all reached the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) in China.

Keywords


Vermibiofilter, Domestic Sewage, Earthworms, Oenanthe javanica.