Seasonal effect on ammonia nitrogen removal by constructed wetlands treating polluted river water in southern Taiwan

2004 ◽  
Vol 127 (2) ◽  
pp. 291-301 ◽  
Author(s):  
Shuh-Ren Jing ◽  
Ying-Feng Lin
Keyword(s):  
River Water ◽  
Constructed Wetlands ◽  
Nitrogen Removal ◽  
Ammonia Nitrogen ◽  
Seasonal Effect ◽  
Polluted River ◽  
Southern Taiwan

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

2019 ◽  
Vol 79 (9) ◽  
pp. 1639-1647 ◽  
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.

Nitrogen removal from polluted river water in a novel ditch–wetland–pond system

2013 ◽  
Vol 60 ◽  
pp. 135-139 ◽  
Author(s):  
Wenzhong Tang ◽  
Wenqiang Zhang ◽  
Yu Zhao ◽  
Yuanyue Wang ◽  
Baoqing Shan
Keyword(s):  
River Water ◽  
Nitrogen Removal ◽  
Polluted River ◽  
Pond System

scholarly journals Effect of the Influent Substrate Concentration on Nitrogen Removal from Summer to Winter in Field Pilot-Scale Multistage Constructed Wetland–Pond Systems for Treating Low-C/N River Water

2021 ◽  
Vol 13 (22) ◽  
pp. 12456
Author(s):  
Tao Wang ◽  
Liping Xiao ◽  
Hongbin Lu ◽  
Shaoyong Lu ◽  
Xiaoliang Zhao ◽  
...  
Keyword(s):  
River Water ◽  
Constructed Wetlands ◽  
Nitrogen Removal ◽  
Constructed Wetland ◽  
Substrate Concentration ◽  
Removal Rate ◽  
Carbon Sources ◽  
River Estuary ◽  
Pilot Scale ◽  
Surface Flow

The quality of micropolluted water is unstable and its substrate concentration fluctuates greatly. The goal is to predict the concentration effect on the treatment of nitrogen in a river with an actual low C/N ratio for the proposed full-scale Xiaoyi River estuary wetland, so that the wetland project can operate stably and perform the water purification function effectively in the long term. Two pilot-scale multistage constructed wetland–pond (MCWP) systems (S1 and S2, respectively) based on actual engineering with the same “front ecological oxidation ponds, two-stage horizontal subsurface flow constructed wetlands and surface flow constructed wetlands (SFCWs) as the core and postsubmerged plant ponds” as the planned process were constructed to investigate the effect of different influent permanganate indexes (CODMn) and total nitrogen (TN) contents on nitrogen removal from micropolluted river water with a fixed C/N ratio from summer to winter in the field. The results indicate that the TN removal rate in the S1 and S2 systems was significant (19.56% and 34.84%, respectively). During the process of treating this micropolluted water with a fixed C/N ratio, the influent of S2 with a higher CODMn concentration was conducive to the removal of TN. The TN removal rate in S2 was significantly affected by the daily highest temperature. There was significant nitrogen removal efficiency in the SFCWs. The C/N ratio was a major determinant influencing the nitrogen removal rate in the SFCWs. The organic matter release phenomenon in SFCWs with high-density planting played an essential role in alleviating the lack of carbon sources in the influent. This research strongly supports the rule that there is seasonal nitrogen removal in the MCWPs under different influent substrate concentrations, which is of guiding significance for practical engineering.

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

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.

Treatment of Polluted River Water Using Pilot-Scale Constructed Wetlands

2006 ◽  
Vol 76 (1) ◽  
pp. 90-97 ◽  
Author(s):  
X. Ruan ◽  
Y. Xue ◽  
J. Wu ◽  
L. Ni ◽  
M. Sun ◽  
...  
Keyword(s):  
River Water ◽  
Constructed Wetlands ◽  
Pilot Scale ◽  
Polluted River
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