Comparison of O3 + GAC, O3 + H2O2 + GAC, and GAC unit operation on natural organic matter and taste and odor causing compounds removal using a pilot plant study

2015 ◽  
Vol 15 (6) ◽  
pp. 1383-1395 ◽  
Author(s):  
Hanbai Park ◽  
Tae-Yul Kim ◽  
Dalsik Woo ◽  
Yong-Sik Cho
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Pilot Scale ◽  
Haloacetic Acids ◽  
Unit Operation ◽  
Water Treatment Plants ◽  
Sensitive Issue ◽  
Taste And Odor ◽  
Odor Removal ◽  
Odor Compounds

Removal of natural organic matter (NOM) and taste and odor problems in drinking water are a sensitive issue in municipal water treatment plants. This study investigated the effectiveness of ozone (O3) + granular activated carbon (GAC), O3 + hydroperoxide (H2O2) + GAC, and GAC processes using a pilot scale plant to remove NOM and geosmin (50–1,000 ng/L), and 2-methylisoborneol (2-MIB: 50–300 ng/L). In the O3 + GAC process, NOM-related parameters showed an average of 52% dissolved organic carbon (DOC) removal from 2 mg/L DOC influent, 99.3% haloacetic acids (HAAs) removal from 0.097 mg/L HAAs influent, and 100% removal from 0.05 mg/L bromide influent. Taste and odor removal rates were 94–100% for geosmin and 87–100% for 2-MIB. The O3 + H2O2 + GAC process removed an average of 55% DOC, 99.7% HAAs, 100% bromate, 94–100% geosmin, and 93–100% 2-MIB. The GAC process removed 46% DOC, 98.3% HAAs, 100% bromate, 83–100% geosmin, and 81–100% 2-MIB. Based on a comparison of the efficiencies and an economic analysis, the O3 + H2O2 + GAC process was determined to be the optimal system for removing NOM and taste and odor compounds.

Determination of Hydrophobic and Hydrophilic Fractions of Natural Organic Matter in Raw Water of Jalalieh and Tehranspars Water Treatment Plants (Tehran)

2007 ◽  
Vol 7 (18) ◽  
pp. 2651-2655 ◽  
Author(s):  
M.A. Zazouli ◽  
S. Nasseri . ◽  
A.H. Mahvi . ◽  
A.R. Mesdaghinia . ◽  
M. Younecian . ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Raw Water ◽  
Water Treatment Plants

Reduction of natural organic matter by an electrolytic process, conventional coagulation and direct descending filtration in a pilot-scale water treatment system

2014 ◽  
Vol 64 (2) ◽  
pp. 168-175 ◽  
Author(s):  
Victor Cochrane Santiago Sampaio ◽  
Eliezer Fares Abdala Neto ◽  
Ari Clecius Alves de Lima ◽  
Isabel Cristina Lima Freitas ◽  
Marisete Dantas de Aquino
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Pilot Scale ◽  
Treatment System ◽  
Water Treatment System ◽  
Electrolytic Process

scholarly journals Monitoring the characteristics and removal of natural organic matter fractions in selected South African water treatment plants

2020 ◽  
Vol 15 (4) ◽  
pp. 932-946
Author(s):  
Welldone Moyo ◽  
Nhamo Chaukura ◽  
Machawe M. Motsa ◽  
Titus A. M. Msagati ◽  
Bhekie B. Mamba ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Specific Treatment ◽  
Ultra Violet ◽  
Correlation Spectroscopy ◽  
Operational Parameters ◽  
Gaussian Peak ◽  
Coastal Plants ◽  
Water Treatment Plants

Abstract This study used spectroscopic methods to investigate the fate and dynamics of natural organic matter (NOM) as it traverses the treatment train at three water treatment plants (WTPs) in South Africa. The character, quantity, and removability of NOM at specific treatment stages was investigated by measuring changes in dissolved organic carbon (DOC) concentration, specific ultra-violet absorbance, UV absorbance, various spectroscopic indices, and maximum fluorescence intensity levels. A novel method of identifying and quantifying fluorescent fractions by combining synchronous fluorescence spectroscopy (SFS) and Gaussian peak fitting is presented. The dynamics of NOM removal were modeled using 2D-SFS correlation spectroscopy. Humic and fulvic substances dominated coastal plants and were the most amenable for removal by coagulation as shown by Hermanus WTP (plant H), which had a 42% DOC removal at the coagulation stage. Tyrosine-like, tryptophan-like and microbial humic-like substances were degraded or transformed concurrently at plant Flag Bushiole (FB) whereas, at plant H, fulvic-like matter was transformed first followed by tyrosine-like then humic-like matter. Through 2D-SFS, this study revealed that NOM transformation was varied as a consequence of NOM character, the type and dosage of treatment chemicals used, and WTPs operational parameters.

scholarly journals Pilot-scale removal of organic micropollutants and natural organic matter from drinking water using ozonation followed by granular activated carbon

2021 ◽  
Author(s):  
Malin Ullberg ◽  
Elin Lavonen ◽  
Stephan J. Köhler ◽  
Oksana Golovko ◽  
Karin Wiberg
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Activated Carbon ◽  
Natural Organic Matter ◽  
Large Fraction ◽  
Drinking Water Treatment ◽  
Granular Activated Carbon ◽  
Pilot Scale ◽  
Organic Micropollutants ◽  
Scale Removal

Conventional drinking water treatment is inefficient in removing a large fraction of known organic micropollutants (OMPs). Ozonation in combination with granular activated carbon is a promising approach for addressing this issue.

scholarly journals The roles of bromide and precursor structures on DBP formation and species distribution

2006 ◽  
Vol 6 (4) ◽  
pp. 27-33 ◽  
Author(s):  
G.S. Wang ◽  
P.L. Huang
Keyword(s):  
Organic Matter ◽  
Organic Acids ◽  
Natural Organic Matter ◽  
Species Distribution ◽  
Ph Effect ◽  
Free Chlorine ◽  
Haloacetic Acids ◽  
Formation Potential ◽  
Trihalomethane Formation Potential

This study investigates the role of bromide and the structure of precursors in DBPs formation. Resorcinol (1,3-dihydroxylbenzene) and 2,4-pentadiol were used to represent the aromatic and aliphatic precursors. Laboratory prepared hydrophilic organic acids was used to simulate the mixtures of the aqueous natural organic matter. The results showed that about 60% of the bromide was transformed into HOBr and OBr− by chlorine when the chlorine dosages was high (5–20 mg/L of free chlorine). However, only 20% of bromide was transformed into HOBr and OBr− at low chlorine dosage (1 mg/L). Trihalomethane formation potential (THMFP) measurements showed that higher THMs formation was obtained at higher pH for 2,4-pentadiol, mainly due to the presence of the bromo-THMs. For resorcinol, however, no bromo-THMs are formed at either pH 7 or 9. For THMFP from hydrophilic organic acids, no apparent pH effect was observed. It is concluded that the higher THM formation at higher pH was mainly due to the formation of bromo-THMs from the aliphatic precursors. Similar trends are obtained in THMFP measurements for haloacetic acids formation potential (HAAFP).

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