scholarly journals Removal of natural organic matter from groundwater using fenton’s process

2013 ◽  
Vol 15 (1) ◽  
pp. 13-20 ◽  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Organic Contaminants ◽  
Ph Value ◽  
Research Performance ◽  
Drinking Water Treatment ◽  
Disinfection Byproducts ◽  
Water Disinfection ◽  
Trihalomethane Formation Potential ◽  
Fenton's Process

Groundwater in the area of eastern Croatia contains increased concentrations of organic compounds, primarily natural organic matter (NOM). Organic compounds in water become a problem in drinking water treatment, especially during water disinfection with chlorine, when harmful disinfection by-products like trihalomethanes appear. Therefore, the removal of disinfection byproducts (DBP) precursors gains high importance. This paper deals with the efficiency of NOM removal from groundwater by the Fenton’s process and its influence on trihalomethane formation potential (THMFP). In this research performance of Fenton process at conditions close to conditions of natural groundwater was investigated. pH value was not decreased under 4.5 and attempt was done to perform Fenton’s process at natural iron concentration in groundwater of town Osijek area. Once optimized, process achieved about 50 % removal of TOC (2.5 mM H2O2; 0.1 mM Fe2+; pH 4.5) and decrease of THMFP (A254/A203) for about 70 % (5 mM H2O2; 0.1 mM Fe2+; pH 4.5). Under adequate conditions Fenton process could be successfully used for the removal of organic contaminants from groundwater.

scholarly journals Natural organic matter as precursor to disinfection byproducts and its removal using conventional and advanced processes: state of the art review

2018 ◽  
Vol 16 (5) ◽  
pp. 681-703 ◽  
Author(s):  
Surbhi Tak ◽  
Bhanu Prakash Vellanki
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Drinking Water Treatment ◽  
Disinfection Byproducts ◽  
Disinfection Byproduct ◽  
Treatment Practices ◽  
Feasible Option ◽  
Current Water

Abstract Natural organic matter (NOM) is ubiquitous in the aquatic environment and if present can cause varied drinking water quality issues, the major one being disinfection byproduct (DBP) formation. Trihalomethanes (THMs) are major classes of DBP that are formed during chlorination of NOM. The best way to remove DBPs is to target the precursors (NOM) directly. The main aim of this review is to study conventional as well as advanced ways of treating NOM, with a broad focus on NOM removal using advanced oxidation processes (AOPs) and biofiltration. The first part of the paper focuses on THM formation and removal using conventional processes and the second part focuses on the studies carried out during the years 2000–2018, specifically on NOM removal using AOPs and AOP-biofiltration. Considering the proven carcinogenic nature of THMs and their diverse health effects, it becomes important for any drinking water treatment industry to ameliorate the current water treatment practices and focus on techniques like AOP or synergy of AOP-biofiltration which showed up to 50–60% NOM reduction. The use of AOP alone provides a cost barrier which can be compensated by the use of biofiltration along with AOP with low energy inputs, making it a techno-economically feasible option for NOM removal.

A Study on the Removal of Natural Organic Matter and Disinfection Byproducts Formation Potential from Groundwater Using Fenton’s Process

2011 ◽  
Vol 14 (1) ◽  
Author(s):  
Jelena J. Molnar ◽  
Jasmina R. Agbaba ◽  
Božo D. Dalmacija ◽  
Srđan D. Rončević ◽  
Snežana P. Maletić ◽  
...  
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Disinfection Byproducts ◽  
Haloacetic Acids ◽  
Fenton Process ◽  
Real Matrix ◽  
Reaction Conditions ◽  
Optimum Reaction ◽  
Fenton's Process

AbstractThis work investigates the efficiency of the Fenton process in removing natural organic matter (NOM) from groundwater. Previous studies focused mostly on the use of Fenton’s process to remove total organic matter, but this research also studies the conditions leading to the formation of hazardous disinfection by-product precursors, and their removal. Solutions of a commercial humic acid as a model of NOM and natural groundwater as a real matrix rich in NOM (dissolved organic carbon, DOC=9.92±0.87 mg/L) were studied. Under optimum reaction conditions, the respective removal efficiencies (expressed as DOC) were 95% from commercial humic acid solution and 82% from groundwater. The decrease in DOC resulted in 99% decrease of the content of precursors of trihalomethanes (THMs) and 98% of haloacetic acids (HAAs) for the investigated matrixes. Precursors of haloacetonitriles, haloketones and chloropicrin were detected at much lower concentrations than the THMs and HAAs precursors.

Removal of natural organic matter and trihalomethane formation potential in a full-scale drinking water treatment plant

2013 ◽  
Vol 13 (4) ◽  
pp. 1099-1108 ◽  
Author(s):  
Ekaterina Vasyukova ◽  
René Proft ◽  
Johanna Jousten ◽  
Irene Slavik ◽  
Wolfgang Uhl
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Organic Carbon ◽  
Natural Organic Matter ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Full Scale ◽  
Formation Potential ◽  
Trihalomethane Formation Potential

A multidisciplinary approach was applied in this work to characterise natural organic matter and evaluate the performance of a full-scale waterworks treating organic-rich surface water. It was shown that the combination of the treatment processes considered efficiently removed the dissolved organic matter, including its specific fractions. Most of the dissolved organic carbon and nitrogen (DOC and DON), biodegradable DOC and DON, as well as assimilable organic carbon were removed by coagulation/sedimentation. However, the coagulation process was not likely to be optimised for the removal of all molecular weight compounds. The breakdown of high molecular weight compounds into others of low molecular weight, as well as the production of biodegradable organic matter during ozonation, proved to enhance their removal efficiency by subsequent biological activated carbon filtration. The specific trihalomethane formation potential decreased during treatment, indicating a decrease in reactivity of DOC with chlorine across the treatment train. Fractionation experiments demonstrated that high and medium molecular weight organics were likely to be the main precursors for the formation of trihalomethanes. However, other disinfection by-products (such as haloacetic acids) should also be controlled, as the chlorine demand pattern did not necessarily follow that of trihalomethane formation.

DISINFEKSI UNTUK PROSES PENGOLAHAN AIR MINUM

2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Nusa Idaman Said
Keyword(s):  
Drinking Water ◽  
Water Purification ◽  
Distribution System ◽  
Residual Effect ◽  
Drinking Water Treatment ◽  
Disinfection Byproducts ◽  
Water Disinfection ◽  
Pathogenic Microorganisms ◽  
Microbiological Contamination ◽  
Disinfection Process

Water disinfection means the removal, deactivation or killing of pathogenic microorganisms. Microorganisms are destroyed or deactivated, resulting in termination of growth and reproduction. When microorganisms are not removed from drinking water, drinking water usage will cause people to fall ill. Chemical inactivation of microbiological contamination in natural or untreated water is usually one of the final steps to reduce pathogenic microorganisms in drinking water. Combinations of water purification steps (oxidation, coagulation, settling, disinfection, and filtration) cause (drinking) water to be safe after production. As an extra measure many countries apply a second disinfection step at the end of the water purification process, in order to protect the water from microbiological contamination in the water distribution system. Usually one uses a different kind of disinfectant from the one earlier in the process, during this disinfection process. The secondary disinfection makes sure that bacteria will not multiply in the water during distribution. This paper describes several technique of disinfection process for drinking water treatment. Disinfection can be attained by means of physical or chemical disinfectants. The agents also remove organic contaminants from water, which serve as nutrients or shelters for microorganisms. Disinfectants should not only kill microorganisms. Disinfectants must also have a residual effect, which means that they remain active in the water after disinfection. For chemical disinfection of water the following disinfectants can be used such as Chlorine (Cl2),  Hypo chlorite (OCl-), Chloramines, Chlorine dioxide (ClO2), Ozone (O3), Hydrogen peroxide etch. For physical disinfection of water the following disinfectants can be used is Ultraviolet light (UV). Every technique has its specific advantages and and disadvantages its own application area sucs as environmentally friendly, disinfection byproducts, effectivity, investment, operational costs etc. Kata Kunci : Disinfeksi, bakteria, virus, air minum, khlor, hip khlorit, khloramine, khlor dioksida, ozon, UV.

The effects of ultraviolet/H2O2 advanced oxidation on the content and characteristics of groundwater natural organic matter

2014 ◽  
Vol 15 (1) ◽  
pp. 34-41 ◽  
Author(s):  
J. Molnar ◽  
J. Agbaba ◽  
A. Tubić ◽  
M. Watson ◽  
M. Kragulj ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Advanced Oxidation ◽  
Total Content ◽  
Process Conditions ◽  
Water Type ◽  
H2o2 Treatment ◽  
Trihalomethane Formation Potential ◽  
Aromatic Character ◽  
A Minor

This work investigates the effects of ultraviolet (UV)/H2O2 advanced oxidation on the content and characteristics of natural organic matter (NOM) originating from two different groundwaters (3.03–9.69 mg/L total organic carbon (TOC), 2.71–4.31 Lmg−1m−1 specific ultraviolet absorbance (SUVA)). Application of UV irradiation resulted in a minor reduction in the total content of NOM. Using UV/H2O2 advanced oxidation led to a significant reduction of the aromatic character of NOM (SUVA was reduced by up to 80%) and an increase in the hydrophilic character of the residual NOM, with the optimal UV/H2O2 treatment conditions depending on the water type. In addition, fluctuations in trihalomethane formation potential (THMFP) were observed depending on the UV/H2O2 process conditions, with a maximal reduction of about 40% achieved for both waters.

scholarly journals Natural organic matter removal by ion exchange at different positions in the drinking water treatment lane

2013 ◽  
Vol 6 (1) ◽  
pp. 1-10 ◽  
Author(s):  
A. Grefte ◽  
M. Dignum ◽  
E. R. Cornelissen ◽  
L. C. Rietveld
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Organic Carbon ◽  
Natural Organic Matter ◽  
Drinking Water Treatment ◽  
Biological Stability ◽  
Sand Filtration ◽  
Slow Sand Filtration

Abstract. To guarantee a good water quality at the customers tap, natural organic matter (NOM) should be (partly) removed during drinking water treatment. The objective of this research was to improve the biological stability of the produced water by incorporating anion exchange (IEX) for NOM removal. Different placement positions of IEX in the treatment lane (IEX positioned before coagulation, before ozonation or after slow sand filtration) and two IEX configurations (MIEX® and fluidized IEX (FIX)) were compared on water quality as well as costs. For this purpose the pre-treatment plant at Loenderveen and production plant Weesperkarspel of Waternet were used as a case study. Both, MIEX® and FIX were able to remove NOM (mainly the HS fraction) to a high extent. NOM removal can be done efficiently before ozonation and after slow sand filtration. The biological stability, in terms of assimilable organic carbon, biofilm formation rate and dissolved organic carbon, was improved by incorporating IEX for NOM removal. The operational costs were assumed to be directly dependent of the NOM removal rate and determined the difference between the IEX positions. The total costs for IEX for the three positions were approximately equal (0.0631 € m−3), however the savings on following treatment processes caused a cost reduction for the IEX positions before coagulation and before ozonation compared to IEX positioned after slow sand filtration. IEX positioned before ozonation was most cost effective and improved the biological stability of the treated water.

Sign in / Sign up

Export Citation Format

Share Document