Nutrient removal from polluted river water by using constructed wetlands

The main purpose of this study was to treat organic pollutants, nitrogen and phosphorus in polluted river water by the use of constructed wetland (CW) systems. A laboratory experiment research was conducted on subsurface flow constructed wetland systems operated in vertical flow (VF) and horizontal flow (HF) mode. The systems were unplanted and hydraulic retention times were identically 2.7 days. The average removal efficiencies for HFCW and VFCW were NH+ 4-N 64.9% and 75.2%, NO- 3-N 92.3% and 40.1%, COD 97.5% and 90.1%, TP 94.6% and 96.2%, respectively. The removal of NH+ 4-N and NO- 3-N in the different CW units were in order of VFCW (drained) > VFCW (flooded) > HFCW and HFCW > VFCW (flooded) > VFCW (drained), respectively. When the water level in the VFCW was changed, an obvious fluctuation of the effluent NH+ 4-N and NO- 3-N concentrations was observed.

Download Full-text

Nutrient removal from polluted river water by using constructed wetlands

Bioresource Technology ◽

10.1016/s0960-8524(00)00100-0 ◽

2001 ◽

Vol 76 (2) ◽

pp. 131-135 ◽

Cited By ~ 79

Author(s):

Shuh-Ren Jing ◽

Yin-Feng Lin ◽

Der-Yuan Lee ◽

Tze-Wen Wang

Keyword(s):

River Water ◽

Constructed Wetlands ◽

Nutrient Removal ◽

Polluted River

Download Full-text

Effect of corn cobs as external carbon sources on nitrogen removal in constructed wetlands treating micro-polluted river water

Water Science & Technology ◽

10.2166/wst.2019.156 ◽

2019 ◽

Vol 79 (9) ◽

pp. 1639-1647 ◽

Cited By ~ 2

Author(s):

Lu-ji Yu ◽

Tao Chen ◽

Yanhong Xu

Keyword(s):

Organic Carbon ◽

River Water ◽

Constructed Wetlands ◽

Carbon Sources ◽

Oxygen Demand ◽

Ammonia Nitrogen ◽

Flow Mode ◽

Low Carbon ◽

Polluted River ◽

Corn Cobs

Abstract Micro-polluted river water is characterized as having limited biodegradability, low carbon to nitrogen ratio and little organic carbon supply, all of which makes it hard to further purify. Two bench scale constructed wetlands (CWs) with a horizontal subsurface flow mode were set up in the laboratory to evaluate their feasibility and efficiency on denitrification with and without corn cobs as external carbon sources. Micro-polluted river water was used as feed solution. The CW without corn cobs substrates possessed a good performance in removing chemical oxygen demand (COD, <40 mg/L) and ammonia nitrogen (NH3-N, <0.65 mg/L), but less efficiency in removing total nitrogen (TN) and nitrate nitrogen (NO3-N). In marked contrast, the CW with 1% (w/w) corn cobs substrates as external carbon sources achieved a significant improvement in the removal efficiency of TN (increased from 34.2% to 71.9%) and NO3-N (increased from 19% to 71.9%). The incorporation of corn cobs substrates did not cause any obvious increase in the concentrations of COD and NH3-N in the effluent. This improvement in the denitrification efficiency was owing to the released organic carbon from corn cobs substrates, which facilitated the growth of abundant microbes on the surface and pores of the substrate. The open area of the used corn chips is larger than that of the pristine ones, and corn cobs can continue to provide a carbon fiber source for denitrification.

Download Full-text

EXPERIMENTAL STUDY ON PURIFICATION OF POLLUTED RIVER WATER WITH HORIZONTAL SUBSURFACE FLOW CONSTRUCTED WETLANDS OF DIFFERENT FILLERS AND PLANTS

Applied Ecology and Environmental Research ◽

10.15666/aeer/1704_89318940 ◽

2019 ◽

Vol 17 (4) ◽

Author(s):

L XIAO

Keyword(s):

Experimental Study ◽

River Water ◽

Constructed Wetlands ◽

Subsurface Flow ◽

Polluted River ◽

Horizontal Subsurface Flow ◽

Subsurface Flow Constructed Wetlands

Download Full-text

Nitrogen transformations and balance in constructed wetlands for slightly polluted river water treatment using different macrophytes

Environmental Science and Pollution Research ◽

10.1007/s11356-012-0996-8 ◽

2012 ◽

Vol 20 (1) ◽

pp. 443-451 ◽

Cited By ~ 46

Author(s):

Haiming Wu ◽

Jian Zhang ◽

Rong Wei ◽

Shuang Liang ◽

Cong Li ◽

...

Keyword(s):

Water Treatment ◽

River Water ◽

Constructed Wetlands ◽

Nitrogen Transformations ◽

Polluted River

Download Full-text

Effect of Spathiphyllum blandum on the removal of ibuprofen and conventional pollutants from polluted river water, in fully saturated constructed wetlands at mesocosm level

Journal of Water and Health ◽

10.2166/wh.2020.232 ◽

2020 ◽

Vol 18 (2) ◽

pp. 224-228

Author(s):

Luis Sandoval ◽

José Luis Marín-Muñíz ◽

Jacel Adame-García ◽

Gregorio Fernández-Lambert ◽

Florentina Zurita

Keyword(s):

River Water ◽

Constructed Wetlands ◽

Large Scale ◽

Wastewater Treatment Plants ◽

Oxygen Demand ◽

Climatic Conditions ◽

Global Network ◽

Large Scale Systems ◽

Polluted River ◽

Generous Support

Abstract In this study, the effect of Spathiphyllum blandum on the removal of ibuprofen (IB) and conventional pollutants such as chemical oxygen demand (COD), total nitrogen (TN), ammonium (NH4+-N), total phosphorus (TP), and total suspended solids (TSS) is reported; this, through its use as an emergent vegetation in fully saturated (FS) constructed wetlands (CWs) at mesocosm level treating polluted river water. With the exception of TP and COD, it was found that for TN (12%), NH4+-N (11%), TSS (19%), and IB (23%), the removals in systems with vegetation were superior to systems without vegetation (p < 0.05). These findings demonstrate the importance of the species S. blandum, in particular, for the removal of ibuprofen, which is an anti-inflammatory drug commonly found in effluents of wastewater treatment plants. Thus, the results obtained provide information that can be used for the design of future efficient large-scale systems using a new ornamental species, mainly under tropical climatic conditions. This article has been made Open Access thanks to the generous support of a global network of libraries as part of the Knowledge Unlatched Select initiative.

Download Full-text