Analysis of Domestic Wastewater Treatment by Infiltration System with Layered filling
LUO Xian ping,LAI Lan ping,FENG Dan,YAN Qun,HAN Lei and LI Jian chang
DOI:10.11835/j.issn.1674-4764.2009.06.024
Received June 16, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2009,Pages 132-136
- Abstract
In order to improve the hydraulic permeability of wastewater infiltration system, two installations were designed with two with layers of red soil and cinder. At the load of 10 cm3/(cm2·d), the average removal efficiency of COD, TP, NH+4-N were different fillers for treating domestic wastewater at laboratory.1 installation was filled with layers of red soil and sand, while 2 obtained 91.1%, 97.6%, 48.7% and 80.1%,respectively by 1 installation; and 94.9%,98.3% and 89.0%,respectively by 2. The average effluent concentrations of nitric and nitrite were 54.7mg/L and 0.09mg/L by 1 installation; and 60.3mg/L and 0.15mg/L by 2. It was found that the removal efficiency of COD,TP and NH4+-N by 2 installation were better than those of 1, whilst 1 installation was more favourable for the removal of nitric and nitrite. The results further implied that layered filling can make good use of its filling performance. The hydraulic permeability of wastewater infiltration system and the removal of pollutants can also be effectively improved.