Municipal wastewater treatment with pond-constructed wetland system: a case study.
The performance of a pond-constructed wetland system in the treatment of municipal wastewater in Kiaochow city was studied; and comparison with oxidation ponds system was conducted. In the post-constructed wetland, the removal of COD, TN and TP is 24%, 58.5% and 24.8% respectively. The treated effluent from the constructed wetland can meet the Chinese National Agricultural and Irrigation Standard. The comparison between pond-constructed wetland system and oxidation pond system shows that total nitrogen removal in a constructed wetland is better than that in an oxidation pond and the TP removal is inferior. A possible reason is the low dissolved oxygen concentration in the wetland. Constructed wetlands can restrain the growth of algae effectively, and can produce obvious ecological and economical benefits.
Wang
X
X
School of Environmental Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Rd, Shanghai, 200240, China. xinzewang@sjtu.edu.cn
Bai
X
X
Qiu
J
J
Wang
B
B
D002681:China; D002947:Cities; D017753:Ecosystem; D056890:Eukaryota / Q000254:growth & development*; D009584:Nitrogen / Q000302:isolation & purification; D009930:Organic Chemicals / Q000302:isolation & purification; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry / Q000378:metabolism; D010758:Phosphorus / Q000302:isolation & purification; D014865:Waste Disposal, Fluid / Q000191:economics / Q000379:methods*; D018508:Water Purification / Q000191:economics / Q000379:methods*
D009930:Organic Chemicals; D010758:Phosphorus; D009584:Nitrogen; D010100:Oxygen