scholarly journals High Rate Nitrogen Removal in an Alum Sludge-Based Intermittent Aeration Constructed Wetland

2012 ◽  
Vol 46 (8) ◽  
pp. 4583-4590 ◽  
Author(s):  
Yuansheng Hu ◽  
Yaqian Zhao ◽  
Xiaohong Zhao ◽  
Jeyakumar L. G. Kumar
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
High Rate ◽  
Intermittent Aeration ◽  
Alum Sludge

High-rate nitrogen removal in a two-stage subsurface vertical flow constructed wetland

Desalination ◽  
2009 ◽  
Vol 246 (1-3) ◽  
pp. 55-68 ◽  
Author(s):  
Guenter Langergraber ◽  
Klaus Leroch ◽  
Alexander Pressl ◽  
Kirsten Sleytr ◽  
Roland Rohrhofer ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
High Rate ◽  
Vertical Flow ◽  
Two Stage ◽  
Vertical Flow Constructed Wetland

MODELLING HIGH RATE P-REMOVAL IN A TWO-STAGE PILOT SCALE ALUM SLUDGE BASED CONSTRUCTED WETLAND SYSTEM

2019 ◽  
Vol 18 (2) ◽  
pp. 359-366
Author(s):  
Lordwin Jeyakumar ◽  
Yaqian Zhao ◽  
Yuansheng Hu ◽  
Akintunde Babatunde ◽  
Xiaohong Zhao
Keyword(s):  
Constructed Wetland ◽  
Pilot Scale ◽  
High Rate ◽  
Two Stage ◽  
Alum Sludge ◽  
Wetland System ◽  
P Removal

High-rate nitrogen removal from carbon limited wastewater using sulfur-based constructed wetland: Impact of sulfur sources

2020 ◽  
Vol 744 ◽  
pp. 140969
Author(s):  
Meng Li ◽  
Rui Duan ◽  
Wen Hao ◽  
Qingcheng Li ◽  
Muhammad Arslan ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
High Rate

Nitrogen Removal in an Oxidation Ditch with Intermittent Aeration

1987 ◽  
Vol 19 (1-2) ◽  
pp. 209-218 ◽  
Author(s):  
Katsuto Inomae ◽  
Hiroyuki Araki ◽  
Kenichi Koga ◽  
Youichi Awaya ◽  
Tetsuya Kusuda ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Carbon Sources ◽  
Full Scale ◽  
Operating Conditions ◽  
High Rate ◽  
Oxidation Ditch ◽  
Intermittent Aeration ◽  
Plant System ◽  
Anoxic Zones ◽  
Typical Process

The typical process of nitrogen removal in the oxidation ditch is achieved through the control of oxygen supply ( forming aerobic and anoxic zones within the ditch channel) or alternating aeration using intermittently operating aerator(s). The operating conditions for efficient nitrogen removal with any of these methods have yet to be clarified. The purpose of this study is to establish an oxidation ditch system with a high rate of nitrogen removal by intermittent aeration. Effects of intermittent aeration on nitrogen removal characteristics were studied by experiments with a bench scale- and full scale-plant and by simulation. The conditions of optimum operation (aerobic and anoxic periods) for a high rate of nitrogen removal were found. These conditions principally depend upon the rates of nitrification and denitrification. By operating the full scale plant system with intermittent aeration ( cycle time is 45 minutes and aerobic ratio is 0.42 ), a high rate nitrogen removal efficiency of 81% was achieved without adding any alkaline matter or organic carbon sources. It was shown that the results of simulation agree with the observed data of the full scale plant system, and that the rate of denitrification depends upon the conditions of intermittent aeration.

Intensified nitrogen removal of constructed wetland by novel integration of high rate algal pond biotechnology

2016 ◽  
Vol 219 ◽  
pp. 757-761 ◽  
Author(s):  
Yi Ding ◽  
Wei Wang ◽  
Xingpo Liu ◽  
Xinshan Song ◽  
Yuhui Wang ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
High Rate

Treatment of Wastewater with Different Ratios of Carbon to Nitrogen Using an Enhanced Nitrogen Removal System of Constructed Wetland

2013 ◽  
Vol 864-867 ◽  
pp. 1287-1292
Author(s):  
Min Tao ◽  
Qi Shuo Wang ◽  
Ji Guang Li ◽  
Juan Juan Qu ◽  
Ya Qun Zhan ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
Intermittent Aeration ◽  
High Concentration ◽  
Low Concentration ◽  
Carbon And Nitrogen ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Better Than ◽  
Removal System

An enhanced nitrogen removal system of constructed wetland has been established, and for which kind of nitrogen containing wastewater was suitable to be treated by such enhanced system was also investigated. The results show that when co-controlled by intermittent aeration and carbon source addition, dissolved oxygen concentration and process carbon-nitrogen ratio in enhanced system were improved, meanwhile TN removal capability was enhanced. For wastewater that contains low concentration of carbon and nitrogen, or low concentration of carbon but high concentration of nitrogen, or high concentration of carbon and nitrogen, or high concentration of carbon and low concentration of nitrogen, the average removal efficiency of COD, TN, NH4+-N, NO3--N and TP in enhanced system were 68.1%, 78.2%, 70.8%, 86.7% and 71.2%, of which the purification capability was significantly better than that of the control system. The enhanced system is especially suitable for treatment of wastewater that contains low concentration of carbon and high nitrogen.

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