Optimization of operation conditions for domestic sewage treatment using a sequencing batch biofilm filter.
A sequencing batch biofilm filter (SBBF) was applied to treat domestic sewage. The bioreactor consisted of fibrous filler in the upper part and ceramsite filter media in the lower part. The impacts of the most important factors including dissolved oxygen (DO), water temperature and hydraulic retention time (HRT) were evaluated on contaminants removal during the operation of the SBBF. Changes in DO (1.5-4.0 mg/L) and water temperature (2-30 °C) had little effect on the removal of chemical oxygen demand (COD), but had a greater impact on the removal of total nitrogen (TN) and NH4+-N. Changes in HRT (8-14 h) had little effect on the removal of COD, but had a greater impact on the removal of TN, NH4+-N and total phosphorus. The optimal operating parameters for the SBBF were as follows: DO of 2-3 mg/L, water temperature above 10 °C, and HRT of 10-13 h. Furthermore, a simple kinetic model was developed, reflecting the relationship between COD and HRT.
School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430081, China E-mail: binji@wust.edu.cn.
Bin
B
Ji
School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430081, China E-mail: binji@wust.edu.cn.
Taoyuan
T
Wei
School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430081, China E-mail: binji@wust.edu.cn.
Wei
W
Chen
School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430081, China E-mail: binji@wust.edu.cn.
Jie
J
Fan
School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430081, China E-mail: binji@wust.edu.cn.
Jian
J
Wang
School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430081, China E-mail: binji@wust.edu.cn.
Lei
L
Zhu
School of Civil Engineering, Wuhan University, Wuhan 430072, China.
Kai
K
Yang
D018441:Biofilms; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D009584:Nitrogen / Q000032:analysis; D010100:Oxygen; D010758:Phosphorus / Q000032:analysis; D012722:Sewage; D013696:Temperature; D064091:Waste Disposal Facilities; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification
D009584:Nitrogen; D010100:Oxygen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical