期刊
WATER SCIENCE AND TECHNOLOGY
卷 63, 期 11, 页码 2719-2724出版社
IWA PUBLISHING
DOI: 10.2166/wst.2011.573
关键词
anthracite; phosphorus removal; steel slag; substrate
资金
- National Nature Science Foundation of China [50808172, 30870221, 50909091]
- Distinguished Young Scientist Fund of Hubei Province, China [2010CDA093]
- Major Science and Technology Program for Water Pollution Control and Treatment of China 11th Five-Year Plan [2009ZX07106-002-004]
This research aimed to investigate the phosphorus (P) removal of a series of laboratory-scale unvegetated vertical-flow constructed wetland systems using anthracite, steel slag and related blends as substrate in treatment of low concentration domestic sewage. The long-term performance of P removal was firstly studied by using single substrate of anthracite or steel slag, and three systems applying various combined substrates were investigated when the average P loading rate varied between 0.9 and 1.5 g TP/m(2).d. The results demonstrated that both anthracite and steel slag systems were highly effective in removing total P (TP, 77.17 +/- 23.34% and 90.26 +/- 4.48%) and soluble reactive P (SRP, 92.14 +/- 12.56% and 96.20 +/- 2.58%). The system filled with anthracite, vermiculite and steel slag from the top down removed 82.45 +/- 9.52% and 87.83 +/- 8.58% of TP and SRP, respectively. However, other combined substrate systems showed comparative low and fluctuant P removal. The effluent pH was maintained at 7-9, which met environmental requirements of China. Therefore, anthracite provides a long-term high efficiency of P removal and may be a promising substrate from the standpoint of the effluent pH, and the arrangement of combined substrate has a prominent effect on P removal.
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