Phosphorus removal by laboratory-scale unvegetated vertical-flow constructed wetland systems using anthracite, steel slag and related blends as substrate

2011 ◽  
Vol 63 (11) ◽  
pp. 2719-2724 ◽  
Author(s):  
Junmei Wu ◽  
Feng He ◽  
Dong Xu ◽  
Rong Wang ◽  
Xiangling Zhang ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
High Efficiency ◽  
Steel Slag ◽  
Laboratory Scale ◽  
Vertical Flow ◽  
Vertical Flow Constructed Wetland ◽  
Long Term Performance ◽  
Term Performance ◽  
P Removal

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/m2·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.

Long term performance of the sand-plant-filter Schattweid (Switzerland)

1997 ◽  
Vol 35 (5) ◽  
pp. 307-314 ◽  
Author(s):  
Andreas Schönborn ◽  
Brigitta Züst ◽  
Evelyn Underwood
Keyword(s):  
Constructed Wetland ◽  
Settling Tank ◽  
Total N ◽  
Human Waste ◽  
Applied Ecology ◽  
Long Term Performance ◽  
Term Performance ◽  
Total P ◽  
P Removal

The human waste concept of the Centre for Applied Ecology Schattweid, Switzerland combines treatment of feces in compost toilets and a constructed wetland for the liquid wastes. The wastewater of 5.1 population equivalents (greywater and urine) is treated in a two chambered settling tank followed by an underground vertical flow sand filter and a horizontal flow constructed wetland. The wastewater system has been in operation since 1985. Its performance has been monitored on COD, NH4-N, NO3-N, NO2-N, Total-P and Total-N almost monthly since then, and on other parameters (Total-Fe, Cl) occasionally. COD elimination (91.4 %) and Total-P removal (90.6%) were stable over the years, whereas NH4-N and Total-N elimination have improved markedly from around 55% to 93.0% (NH4-N) and 80.0% (Total-N). Performance in winter was excellent. The addition of an easily degradable carbon source to the plant filter in summer 1991 led to a markedly decreased phosphorus retention and a washout of iron during the experiment.

Long-Term Performance of a Constructed Wetland for Metal Removal

2010 ◽  
Vol 19 (6) ◽  
pp. 667-685 ◽  
Author(s):  
Anna Sophia Knox ◽  
Eric A. Nelson ◽  
Nancy V. Halverson ◽  
John B. Gladden
Keyword(s):  
Constructed Wetland ◽  
Metal Removal ◽  
Long Term Performance ◽  
Term Performance

Long-term performance of nutrient removal in an integrated constructed wetland

2021 ◽  
Vol 779 ◽  
pp. 146268
Author(s):  
Yinuo Zhu ◽  
Lijuan Cui ◽  
Jing Li ◽  
Rumiao Wang ◽  
Jan Vymazal ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Nutrient Removal ◽  
Integrated Constructed Wetland ◽  
Long Term Performance ◽  
Term Performance

scholarly journals Phosphorus removal in a vertical flow constructed wetland using dolomite powder and chippings as filter media

2015 ◽  
Vol 1 (1) ◽  
pp. 46-52 ◽  
Author(s):  
Gražina Žibienė ◽  
Midona Dapkienė ◽  
Jurgita Kazakevičienė ◽  
Algirdas Radzevičius
Keyword(s):  
Total Phosphorus ◽  
Constructed Wetland ◽  
Phosphorus Removal ◽  
Pilot Scale ◽  
Laboratory Scale ◽  
Laboratory Research ◽  
Vertical Flow ◽  
Filter Media ◽  
Vertical Flow Constructed Wetland ◽  
One Year

Different kinds of natural and artificial filter media are able to retain phosphorus in the constructed wetlands. Due to the fact that the constructed wetland needs huge amounts of the filter media, it is very important to find locally available material which distinguishes itself by its ability to retain phosphorus. The materials found in Lithuania were considered and dolomite was chosen. Two dolomite fractions, dolomite powder (1–2 mm) and dolomite chippings (2–5 mm), and sand media were used in the laboratory- scale installed for the comparative experiments. The laboratory-scale with dolomite as the filter media was on average by 21% more efficient in total phosphorus removal in comparison with the sand media. Based on the laboratory research pilot–scale vertical flow constructed wetland of 160 m2 was installed and planted with reed Phragmites australis. The dolomite chippings as filter media were chosen in order to avoid the danger of the clogging of constructed wetland. Efficiency of total phosphorus removal in the pilot-scale vertical flow constructed wetland was on average 95.7%, phosphates removal – 94.8% within one year.

Long-term performance of aerated and planted constructed wetland treatment on domestic wastewater

2017 ◽  
Vol 64 ◽  
pp. 64-71
Author(s):  
Jingjing Lv ◽  
Li’an Hou ◽  
Lieyu Zhang ◽  
Beidou Xi ◽  
Xuhui Mao ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Domestic Wastewater ◽  
Wetland Treatment ◽  
Long Term Performance ◽  
Term Performance
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