scholarly journals DIRECT TREATMENT OF POLLUTED RIVER WATER BY THE MULTI-SOIL-LAYERING METHOD

2003 ◽  
Vol 1 (1) ◽  
pp. 97-104 ◽  
Author(s):  
Tsuigiyuki Masunaga ◽  
Kuniaki Sato ◽  
Takayuki Zennami ◽  
Syunitsu Fujii ◽  
Toshiyuki Wakatsuki
Keyword(s):  
River Water ◽  
Polluted River ◽  
Direct Treatment ◽  
Soil Layering

Polluted River Water Treatment Using Multi-Soil-Layering System (MSL) in Different Surface Loads

2013 ◽  
Vol 800 ◽  
pp. 584-592
Author(s):  
Ye Hai ◽  
Li Sen ◽  
Zeng Yuan ◽  
Zheng Jun ◽  
Xiao Fei Yan
Keyword(s):  
River Water ◽  
Removal Rate ◽  
Dianchi Lake ◽  
Surface Load ◽  
River Bank ◽  
Polluted River ◽  
Term Operation ◽  
Operation Conditions ◽  
Soil Layering ◽  
Surface Loads

For a better application of multi-soil-layering (MSL) system to treat polluted river water flowing into Dianchi Lake in different surface loads, six systems are set on the river bank of New Yunliang River for a four-month-experiment. The surface loads are set as 800L/m2•d, 1000 L/m2•d, 1500 L/m2•d, 2000 L/m2•d, 3000 L/m2•d and 4000 L/m2•d, respectively. When the surface load is 1000L/m2•d, the average removal rate of COD, TN, NH4+-N and TP are 74.8%, 28.9%, 88.5% and 87.0% respectively; when the surface load is 1500 L/m2•d, the average removing rate of COD, TN, NH4+-N and TP are 72.4%, 20.2%, 83.9% and 84.1% respectively. The surface load has a big influence on the removal of COD, NH4+-N and TP. Due to insufficient denitrification, the removing rate of TN is comparatively low. With a view to the removing effect and load reduction and the long-term operation conditions of the system, the most appropriate surface load is between 1000~1500 L/m2•d.

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 Status of multielement in water of the river Buriganga, Bangladesh: Aquatic chemistry of metal ions in polluted river water

2021 ◽  
Vol 7 ◽  
pp. 99-115
Author(s):  
Aklima Nargis ◽  
Ahsan Habib ◽  
Harun-Or-Rashid ◽  
Halima Binte Harun ◽  
Md Shafiqul Islam Sarker ◽  
...  
Keyword(s):  
Metal Ions ◽  
River Water ◽  
Aquatic Chemistry ◽  
Polluted River

scholarly journals Chromium bioremediation potential of indigenous Bacillus pumillus isolated from river water of Bangladesh

2021 ◽  
Vol 38 (1) ◽  
pp. 27-30
Author(s):  
Sangita Ahmed ◽  
Rakibul Hasan ◽  
Sumaiya Aziz Khan ◽  
Razu Ahmed
Keyword(s):  
River Water ◽  
Animal Health ◽  
Treatment Plant ◽  
Effluent Treatment ◽  
Potential Reduction ◽  
Polluted River ◽  
Whole Cells ◽  
Effluent Treatment Plant ◽  
Rapid Industrialization ◽  
Chromium Tolerance

Bangladesh has achieved rapid industrialization in recent years. However, many of these industries lack proper effluent treatment plant and discharge untreated effluent laden with different heavy metals into the major rives that surround these industries, affecting the environment as well as human and animal health. Aiming to develop a sustainable effluent treatment plant, a heavy metal tolerant Bacillus pumillus isolated from polluted river water of Bangladesh was studied for its chromium bioremediation potential. Reduction of hexavalent chromium using the Sdiphenylcarbazide (DPC) method showed that whole cells of the Bacillus pumillus reduced 89.5%, 75%, 73% and 45% of 1.0, 2.5, 5 and 10mg/L Cr(VI) to Cr(III), respectively. This bacterium reduced 100% of 20mg/L Cr(VI) to Cr(III) within 8 hours, in a growth associated pattern. A 20kb plasmid was detected in this Bacillus pumillus, and loss of this plasmid did not cause complete impairment of chromium tolerance capacity, though the tolerance efficiency was reduced. The Bacillus pumillus studied in the current study therefore shows its potential to develop a sustainable chromium bioremediation method. Bangladesh J Microbiol, Volume 38, Number 1, June 2021, pp 27-30

Nutrient Removal from Polluted River Water by Combining Vertical and Horizontal Subsurface Flow Constructed Wetlands

2013 ◽  
Vol 663 ◽  
pp. 1029-1032 ◽  
Author(s):  
Cheng Xin Qin ◽  
Gang He ◽  
Yu Huan Duan ◽  
Xiao Ping Pang ◽  
Zong Lian She
Keyword(s):  
River Water ◽  
Removal Rate ◽  
Subsurface Flow ◽  
Ammonia Removal ◽  
Polluted River ◽  
Main Layer ◽  
Second Stage ◽  
N Removal ◽  
Different Depths ◽  
Horizontal Subsurface Flow

A lab-scale hybrid constructed wetland system was constructed to purify polluted river water. The system was composed of a first stage of the vertical subsurface flow filter, followed by a second stage of horizontal subsurface flow bed. Both beds used furnace slag with a size of 4-60 mm for the main layer. The system was continuously fed. Different depths of unsaturated layer (0 cm, 15 cm and 30 cm) in vertical filter were tested. The unsaturated layer of 30 cm in vertical filter presented the most effective ammonia removal of 89.1%, while lowest NO3--N removal rate of 74.1% for the system. High TN removal efficiencies (77.3%-81.0%) could be observed during operation of three depths. The removals of COD and TP were in the range of 97.1%-98.4% and 76.4%-88.9%, respectively.

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