Characterization of membrane foulants in a pilot-scale powdered activated carbon–membrane bioreactor for drinking water treatment

2014 ◽  
Vol 49 (10) ◽  
pp. 1741-1746 ◽  
Author(s):  
Senlin Shao ◽  
Fangshu Qu ◽  
Heng Liang ◽  
Haiqing Chang ◽  
Huarong Yu ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Membrane Bioreactor ◽  
Drinking Water Treatment ◽  
Pilot Scale ◽  
Powdered Activated Carbon ◽  
Carbon Membrane

Long term operation of high concentration powdered activated carbon membrane bio-reactor for advanced water treatment

2004 ◽  
Vol 50 (8) ◽  
pp. 81-87 ◽  
Author(s):  
G.T. Seo ◽  
C.D. Moon ◽  
S.W. Chang ◽  
S.H. Lee
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Membrane Bioreactor ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Powdered Activated Carbon ◽  
Carbon Membrane ◽  
High Concentration ◽  
Term Operation ◽  
Nakdong River Basin

A pilot scale experiment was conducted to evaluate the performance of a membrane bioreactor filled with high concentration powdered activated carbon. This hybrid system has great potential to substitute for existing GAC or O3/BAC processes in the drinking water treatment train. The system was installed at a water treatment plant located downstream of the Nakdong river basin, Korea. Effluent of rapid sand filter was used as influent of the system which consists of PAC bio-reactor, submerged MF membrane module and air supply facility. PAC concentration of 20 g/L was maintained at the beginning of the experiment and it was increased to 40 g/L. The PAC has not been changed during the operational periods. The membrane was a hollow fiber type with pore sizes of 0.1 and 0.4 µm. It was apparent that the high PAC concentration could prevent membrane fouling. 40 g/L PAC was more effective to reduce the filtration resistance than 20 g/L. At the flux of 0.36 m/d, TMP was maintained less than 40 kPa for about 3 months by intermittent suction type operation (12 min suction/3 min idling). Adsorption was the dominant role to remove DOC at the initial operational period. However the biological effect was gradually increased after around 3 months operation. Constant DOC removal could be maintained at about 40% without any trouble and then a tremendous reduction of DBPs (HAA5 and THM) higher than 85% was achieved. Full nitrification was observed at the controlled influent ammonia nitrogen concentration of 3 and 7 mg/L. pH was an important parameter to keep stable ammonia oxidation. From almost two years of operation, it is clear that the PAC membrane bioreactor is highly applicable for advanced water treatment under the recent situation of more stringent DBPs regulation in Korea.

Pilot-scale UV/H2O2-BAC process for drinking water treatment – Analysis and comparison of different activated carbon columns

2020 ◽  
Vol 382 ◽  
pp. 123044 ◽  
Author(s):  
Zhenqi Du ◽  
Ruibao Jia ◽  
Congcong Li ◽  
Pengwei Cui ◽  
Wuchang Song ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Pilot Scale ◽  
Treatment Analysis

scholarly journals Removal of radio N-nitrosodimethylamine (NDMA) from drinking water by coagulation and Powdered Activated Carbon (PAC) adsorption

2009 ◽  
Vol 2 (1) ◽  
pp. 79-100 ◽  
Author(s):  
J. Chung ◽  
Y. Yoon ◽  
M. Kim ◽  
S.-B. Lee ◽  
H.-J. Kim ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Background Electrolyte ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Powdered Activated Carbon ◽  
Individual Treatment ◽  
Solution Ph ◽  
Treatment Processes

Abstract. The presence of N-nitrosodimethylamine (NDMA) in drinking water supplies has raised concern over its removal by common drinking water treatment processes. A simple detection method based on scintillation spectroscopy has been used to quantify the concentration of 14C-labeled NDMA at various ratios of sample to scintillation liquid. Without sample pretreatment, the method detection limits are 0.91, 0.98, 1.23, and 1.45 ng/L of NDMA at scintillation intensity ratios of 10:10, 5:15, 15:5, and 2.5:17.5 (sample: scintillation liquid), respectively. The scintillation intensity in all cases is linear (R2>0.99) and is in the range of 0 to 100 ng/L of NDMA. In addition, because scintillation intensity is independent of solution pH, conductivity, and background electrolyte ion types, a separate calibration curve is unnecessary for NDMA samples at different solution conditions. Bench-scale experiments were performed to simulate individual treatment processes, which include coagulation and adsorption by powdered activated carbon (PAC), as used in a drinking water treatment plant, and biosorption, a technique used in biological treatment of waste water. The commonly used coagulation process for particulate control and biosorption is ineffective for removing NDMA (<10% by coagulation and <20% by biosorption). However, high doses of PAC may be applied to remove NDMA.

scholarly journals Assessing biofilm on biofilter media (granular activated carbon and anthracite) from a pilot scale drinking water treatment plant

2021 ◽  
Author(s):  
Nick Dimas
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Granular Activated Carbon ◽  
Water Treatment Plant ◽  
Pilot Scale ◽  
Microbial Biofilms ◽  
Attachment Sites

Drinking Water Treatment Plants employ biofiltration systems to increase water quality through nutrient reduction. Microbial biofilms housed in biofilter media, are responsible for nutrient uptake and biodegradation. The purpose of this study was to re-evaluate the function and efficiency of biofilter media and investigate seasonal changes in the microbial populations. TOC and DO were more reduced in Granular Activated Carbon (GAC) media than in anthracite. Heterotrophic plate counts (HPC) were conducted to establish seasonal trends on microbial population. PCR-amplified 16S rRNA fragments were sequenced to compare microbial communities. Summer samples have higher HPC than winter samples. Summer samples yielded a reduction in microbial diversity and no detectable overlap with winter samples. Confocal microscopy conducted to qualitatively visualize the structure of biofilms was complemented by quantitative COMSTAT analysis showing GAC with double the biomass due to a greater level of attachment sites. GAC outcompetes anthracite in chemical adsorption and biological activity.

Quenching H2O2 residuals after UV/H2O2 oxidation using GAC in drinking water treatment

2018 ◽  
Vol 4 (10) ◽  
pp. 1662-1670 ◽  
Author(s):  
Yifeng Huang ◽  
Zhijie Nie ◽  
Chengjin Wang ◽  
Yi Li ◽  
Mindy Xu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Granular Activated Carbon ◽  
Pilot Scale ◽  
H2o2 Oxidation

Pilot-scale and lab-scale experiments were performed to evaluate the ability of granular activated carbon (GAC) to quench hydrogen peroxide (H2O2).

Prediction of powdered activated carbon doses for 2-MIB removal in drinking water treatment using a simplified HSDM approach

Chemosphere ◽  
2016 ◽  
Vol 156 ◽  
pp. 374-382 ◽  
Author(s):  
Jianwei Yu ◽  
Fong-Chen Yang ◽  
Wei-Nung Hung ◽  
Chia-Ling Liu ◽  
Min Yang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Powdered Activated Carbon

A pilot-scale study of a powdered activated carbon-membrane bioreactor for the treatment of water with a high concentration of ammonia

2016 ◽  
Vol 2 (1) ◽  
pp. 125-133 ◽  
Author(s):  
Senlin Shao ◽  
Fangshu Qu ◽  
Heng Liang ◽  
Haiqing Chang ◽  
Huarong Yu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Membrane Bioreactor ◽  
Pilot Scale ◽  
Ammonia Removal ◽  
Powdered Activated Carbon ◽  
Carbon Membrane ◽  
High Concentration

Ammonia removal was highly impacted by temperature and alkalinity. Fouling cake could remove a certain amount of ammonia.

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