Use of membrane bioreactors for the bioremediation of chlorinated compounds polluted groundwater

2007 ◽  
Vol 55 (10) ◽  
pp. 209-216 ◽  
Author(s):  
A. Carucci ◽  
I. Manconi ◽  
L. Manigas
Keyword(s):  
Water Treatment ◽  
Human Health ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Membrane Bioreactors ◽  
Treatment Technology ◽  
Chlorinated Compounds ◽  
System A ◽  
Agricultural Applications ◽  
Effective Water

Chlorinated compounds are widely used in agricultural applications where they are employed as components of pesticides; this leads often to pollution of groundwater near to agricultural sites, with serious effects for human health. The aim of the present study was the development of a membrane bioreactor, a new and effective water treatment technology, for the bioremediation of water polluted by 1,2-dichloroethane, 1,2-dichlorobenzene and 2-chlorophenol. Before starting-up the MBR system, a biomass was acclimated, to simultaneously degrade the three chlorinated compounds; then the acclimated biomass was inoculated into the MBR. The results showed a higher removal rate for 1,2-dichloroethane than for 1,2-dichlorobenzene; besides, the presence of 1,2-dichlorobenzene together with 1,2-dichloroethane decreased 1,2-dichloroethane specific removal rate. 2-chlorophenol was degraded only in presence of phenol as co-substrate, and the presence of phenol and 2-chlorophenol decreased 1,2-dichloroethane specific removal rate of approximately eight times, while 1,2-dichlorobenzene specific removal rate was not affected.

Study on the Effect of Different Water Treatment Technology on Removing 2-MIB

2014 ◽  
Vol 587-589 ◽  
pp. 594-597
Author(s):  
Ping Xia ◽  
Dong Zhang ◽  
Zheng Wang ◽  
Hui Ye ◽  
Yu Qiong Shen ◽  
...  
Keyword(s):  
Water Treatment ◽  
Treatment Process ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Removal Rate ◽  
Pilot Test ◽  
Control Technology ◽  
Odor Control ◽  
Treatment Technology ◽  
Water Treatment Process

To compare the removal efficiency of 2-MIB by traditional water treatment, prechlorination, O3-BAC, MIEX pre adsorption and UV/H2O2 advanced oxidation process, the pilot-test of drinking water odor control technology were studied in this paper. The results showed that the traditional water treatment process had poor effect on removing 2-MIB, with about 10% removal rate, while the O3-BAC process was the best at removing 2-MIB, whose removal rate reached over 90%. And the 2-MIB removal rate of UV/H2O2 process was about 55% and that of prechlorination process was about 20%. However, the MIEX pretreatment process had almost no effect on removing 2-MIB.

Application of Electrosorption Desalination Technology in Coking Wastewater Treatment

2012 ◽  
Vol 573-574 ◽  
pp. 516-520
Author(s):  
Nan Zhang ◽  
Gai Feng Xue ◽  
Pu Liu ◽  
Li Na Wang
Keyword(s):  
Water Treatment ◽  
Ph Value ◽  
Removal Rate ◽  
Cooling Water ◽  
Economic Benefits ◽  
Coking Wastewater ◽  
Toxic Substances ◽  
Treatment Technology ◽  
Circulating Cooling Water ◽  
Water Treatment Technology

Coking wastewater is generated from metallurgy industry and it contains many highly toxic substances. Because the coking wastewater would bring about severe environmental pollution, it is best to reuse it as circulating cooling water. However, there are large quantities of ions in coking wastewater, which would cause serious corrosion to the pipe and the devices in the process of recycling. Therefore, desalting techniques are necessary for the reused of coking wastewater. Electrosorption technique (EST), as a new type of water treatment technology, can meet the economic benefits of water treatment technology. It also can achieve better water quality and reliability standards which have never been achieved before. In this paper, a new electrosorption device was invented and it was used for desalting of coking wastewater. The main parameters affecting the electrosorption of ions including voltage, electrosorption time, pH value, temperature and electric current have been investigated in detail. Under the optimized experimental condition, after electrosorption process, a salt removal rate of 75% was obtained. The quality of effluent could satisfy the criterion of industrial circulating cooling water (GB 50050-2007) and could be reused as the circulating cooling water in coking plant.

The Research of Wastewater Treatment by Membrane Bioreactor (MBR)

2014 ◽  
Vol 618 ◽  
pp. 376-379
Author(s):  
Nan Lu ◽  
Jia Chuan Chen ◽  
Gui Hua Yang
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Treatment Technology ◽  
Effect Of Ph ◽  
Maximum Value

Membrane bioreactor is a combination of membrane and sewage biological treatment technology, which is the new wastewater treatment technology .In this paper, the effect of pH and NH3-N load on membrane bioreactor for wastewater treatment is studied. Through the use of artificial mixed wastewater experiments,the results are as follows:The effect of pH on the effluent COD is not obvious, on the removal of NH3-N is very large. Taking into account of removal of organics and NH3-N, the pH should be controlled at 8.0.The removal rate of NH3-N decreased significantly with the increase of the NH3-N load. When the NH3-N load is 0.023 Kg/m3· d, the removal rate reach the maximum value. In this case,the load of COD is 1.1 Kg/ m3.d.

scholarly journals Application of microfiltration–nanofiltration combined technology for drinking water advanced treatment in a large-scale engineering project

2021 ◽  
Author(s):  
Mu Liu ◽  
Shaohua Wang ◽  
Tongchun Wang ◽  
Mengyuan Duan ◽  
Yingqiang Su ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Large Scale ◽  
Removal Rate ◽  
Drinking Water Treatment ◽  
Advanced Treatment ◽  
Treatment Technology ◽  
Engineering Project ◽  
Pilot Testing ◽  
Water Plant

Abstract By analyzing and comparing the pressurized-pot microfiltration (MF) system and the ultrafiltration membrane as the pretreatment technology of the nanofiltration (NF) system through pilot testing, the research demonstrates the feasibility of combined technology of NF with pressurized-pot MF for the practical application in engineering. The testing result indicates that the combined technology performs over 90% removal rate for organic substances and humus (UV254) and 70–80% removal rate for disinfection by-products including chloroform, bromoform and carbon tetrachloride. In addition, the combined technology also shows 70% minimum removal rate for pigments including chlorophyll and phycocyanobilin, 20–60% removal rate for water hardness, over 95% removal rate for sulfates which occupies the major part of bivalent salts, and 50–70% removal rate for odorous substances. Based on the pilot testing results, a new water purification process, which is sequentially combined by the conventional drinking water treatment technology, pressurized-pot MF and NF, is creatively applied in the large-scale engineering project of drinking water advanced treatment of Zhangjiagang Third Water Plant for the first time in China. The designed water-production amount of this project is 100 thousand tons per day, and the project is aimed at reforming and upgrading the drinking water treatment technology which is currently used in the Zhangjiagang Third Water Plant. The recovery rate of the NF system applied in the project is able to reach 90%, and the predicted electricity consumption of pressurized-pot MF system and NF system is, respectively, 0.003 and 0.197 kWh/ton of water. After accomplishing the project, Zhangjiagang Third Water Plant will be capable of supplying drinking water with higher quality and will simultaneously possess higher capability of replying to water contamination emergencies.

scholarly journals Study on the Effect of Membrane Active Surface Orientation in OMBR on Norfloxacin Wastewater Treatment

2021 ◽  
Vol 12 (4) ◽  
pp. 26-29
Author(s):  
Xiaoqing Chen ◽  
◽  
Litong Cai
Keyword(s):  
Water Quality ◽  
Chloride Solution ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Forward Osmosis ◽  
Active Surface ◽  
Treatment Technology ◽  
Magnesium Chloride Solution ◽  
Membrane Flux ◽  
New Treatment

The forward osmosis membrane bioreactor (OMBR) is a kind of new treatment technology which applied forward osmosis technology to the membrane bioreactor. In this paper, the OMBR was adopted to tackle with the typical antibiotic wastewater.The influence of orientation was investigated. The results showed that the magnesium chloride solution with high osmotic pressure is advantageous for OMBR due to its superior membrane flux and a better producing water quality and the membrane flux decreases with a rise of the concentration of sewage and sludge. In this condition, the removal rate of COD and norfloxacin is 84.21% and 93.70%, respectively.

MASALAH DAN ALTERNATIF TEKNOLOGI PENGOLAHAN AIR UNTUK MASYARAKAT MISKIN KOTA

2018 ◽  
Vol 6 (3) ◽  
Author(s):  
Arie Herlambang
Keyword(s):  
Water Treatment ◽  
Ground Water ◽  
Potable Water ◽  
Diarrheal Disease ◽  
Low Cost ◽  
Clean Water ◽  
Treatment Technology ◽  
Alternative Technologies ◽  
The Poor ◽  
Daily Water

Clean water to poor communities who live in crowded municipal area is stillexpensive and a luxury. This condition is evidenced by the number of people whouse ground water for their daily water, because water taps still seems expensivefor them. Diarrheal disease is still relatively high for Indonesia, where nearly 16thousand people suffer from diarrhea due to poor sanitation. To help the poor inthe city, there are several alternative technologies that can be applied to publicaccess to clean water and adequate low-cost, including ground water treatmenttechnology with a filter system equipped with an ultraviolet sterilizer, or ozonegenerators, or using ultrafiltration, if possible can also use the reverse osmosismembrane that for fresh water. Arsinum is the best alternative should be chosenfor fulfilled potable water in slump area.Keywords : Sanitation, water treatment technology, portable water, low-cost, slump area

Cost-effective water treatment of polluted surface water by using direct filtration and granular activated carbon filtration

2002 ◽  
Vol 2 (1) ◽  
pp. 233-240 ◽  
Author(s):  
J. Cromphout ◽  
W. Rougge
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Treatment Process ◽  
Treatment Plant ◽  
Granular Activated Carbon ◽  
Cost Effective ◽  
Water Treatment Plant ◽  
Direct Filtration ◽  
Carbon Filtration ◽  
Effective Water

In Harelbeke a Water Treatment Plant with a capacity of 15,000 m3/day, using Schelde river water has been in operation since April 1995. The treatment process comprises nitrification, dephosphatation by direct filtration, storage into a reservoir, direct filtration, granular activated carbon filtration and disinfection. The design of the three-layer direct filters was based on pilot experiments. The performance of the plant during the five years of operation is discussed. It was found that the removal of atrazin by activated carbon depends on the water temperature.

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