Comparison of AOPs for the removal of natural organic matter: performance and economic assessment

2004 ◽  
Vol 49 (4) ◽  
pp. 267-272 ◽  
Author(s):  
C.A. Murray ◽  
S.A. Parsons
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Advanced Oxidation Processes ◽  
Economic Assessment ◽  
Source Water ◽  
Control Methods ◽  
Water Quality Standards ◽  
Optimum Conditions ◽  
Organic Precursor ◽  
By Products

Control of disinfection by-products during water treatment is primarily achieved by reducing the levels of organic precursor species prior to chlorination. Many waters contain natural organic matter at levels up to 15 mg L-1; therefore it is necessary to have a range of control methods to support conventional coagulation. Advanced oxidation processes are such processes and in this paper the Fenton and photo-Fenton processes along with photocatalysis are assessed for their NOM removal potential. The performance of each process is shown to be dependent on pH and chemical dose as well as the initial NOM concentration. Under optimum conditions the processes achieved greater than 90% removal of DOC and UV254 absorbance. This removal led to the THMFP of the source water being reduced from 140 to below 10 mg L-1, well below UK and US standards. An economic assessment of the processes revealed that currently such processes are not economic. With advances in technology and tightening of water quality standards these processes should become economically feasible options.

Oxidation of natural organic matter with processes involving O3, H2O2and UV light: formation of oxidation and disinfection by-products

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86212-86219 ◽  
Author(s):  
Jasmina Agbaba ◽  
Jelena Molnar Jazić ◽  
Aleksandra Tubić ◽  
Malcolm Watson ◽  
Snežana Maletić ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Advanced Oxidation Processes ◽  
Uv Light ◽  
Advanced Oxidation ◽  
Product Formation ◽  
Uv Photolysis ◽  
Oxidation Processes ◽  
By Products

This study investigates the effects of UV photolysis, ozonation and different advanced oxidation processes (O3/UV, H2O2/UV and O3/H2O2/UV) on the oxidation of groundwater natural organic matter (NOM) and by-product formation.

Advanced oxidation processes: flowsheet options for bulk natural organic matter removal

2004 ◽  
Vol 4 (4) ◽  
pp. 113-119 ◽  
Author(s):  
C.A. Murray ◽  
S.A. Parsons
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Natural Organic Matter ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Oxidation Processes

Advanced oxidation processes have been reported to have the potential to remove natural organic matter from source waters. Of these Fenton's reagent, photo-Fenton's reagent and titanium dioxide photocatalysis are the three most promising processes. Compared to conventional coagulation/flocculation processes they have higher removal efficiencies in terms of both dissolved organic carbon and UV254 absorbance. Under optimum reaction conditions all three remove over 80% dissolved organic carbon and 0% UV254 absorbance. In addition the enhanced removal of natural organic matter leads to a corresponding reduction in the formation of disinfection by-products following chlorination of the treated water. Advanced oxidation processes give enhanced removal of organic species ranging from low to high molecular weight while coagulation/flocculation is inefficient at removing low molecular weight species. One additional benefit is all three processes produce less residuals compared to conventional coagulation, which is advantageous as the disposal of such residuals normally contributes a large proportion of the costs at water treatment works.

Pre-ozonation of source water: Assessment of efficacy against Giardia duodenalis cysts and effects on natural organic matter

Chemosphere ◽  
2019 ◽  
Vol 214 ◽  
pp. 764-770 ◽  
Author(s):  
Liane Yuri Kondo Nakada ◽  
Regina Maura Bueno Franco ◽  
Vagner Ricardo da Silva Fiuza ◽  
Luciana Urbano dos Santos ◽  
Nilson Branco ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Giardia Duodenalis ◽  
Source Water ◽  
Water Assessment

scholarly journals Removal of Trihalomethane Precursors by Nanofiltration in Low-SUVA Drinking Water

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1370 ◽  
Author(s):  
Yael Dubowski ◽  
Roni Greenberg-Eitan ◽  
Menachem Rebhun
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Low Molecular Weight ◽  
Water Recovery ◽  
Formation Potential ◽  
Pressure Water ◽  
Membrane Type ◽  
Hydrophilic Organic Matter ◽  
By Products

Trihalomethanes (THMs) are prevalent disinfection by-products. High THM formation is usually associated with natural organic matter with high molecular weight and aromatic characteristics, which is efficiently removed by nanofiltration (NF). In the Sea of Galilee and the Israeli National Water Carrier (NWC), water shows high THM formation potential, although it mainly contains low molecular weight and hydrophilic organic matter with low aromaticity. In the present study, NF removal abilities were tested on treated NWC water using three different spiral wound membranes (NF90, NF270, and DL). Rejections and fluxes were tested as a function of pressure, water recovery, and membrane type. Feed and permeate dissolved organic carbon (DOC), UVA254, total THM formation (THMF), and total THM formation potential (THMFP), as well as alkalinity, conductivity, hardness, Ca2+, Mg2+, and Cl− were measured to evaluate rejection and THM formation reduction. The results demonstrated that NF can efficiently remove natural organic matter (NOM) and reduce THM formation, even in this challenging type of water. At low water recovery, membranes showed average rejection of about 70–85% for THMFP and THM. Upon elevating recovery, average THM and THMFP rejection decreased to 55–70%, with THM content still well below regulation limits. Of the membranes tested, the higher permeability of NF270 appears to make it economically favorable for the applications tested in this work.

Effects of ozonation pretreatment on natural organic matter and wastewater derived organic matter – Possible implications on the formation of ozonation by-products

Chemosphere ◽  
2017 ◽  
Vol 170 ◽  
pp. 33-40 ◽  
Author(s):  
Alexandros Papageorgiou ◽  
Stylianos K. Stylianou ◽  
Pavlos Kaffes ◽  
Anastasios I. Zouboulis ◽  
Dimitra Voutsa
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
By Products
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