Enhanced removal of manganese in organic-rich surface water by combined sodium hypochlorite and potassium permanganate during drinking water treatment

RSC Advances ◽  
2015 ◽  
Vol 5 (35) ◽  
pp. 27970-27977 ◽  
Author(s):  
Wenzheng Yu ◽  
Luiza Campos ◽  
Tong Shi ◽  
Guibai Li ◽  
Nigel Graham
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Surface Water ◽  
Potassium Permanganate ◽  
Sodium Hypochlorite ◽  
Drinking Water Treatment ◽  
High Concentration

Combination of KMnO4and NaClO is beneficial and synergistic for removing Mn2+in water with high concentration of organic matter.

Nanofiltration selection for NOM removal: pilot and full-scale operation

2011 ◽  
Vol 6 (2) ◽  
Author(s):  
Laurence Durand-Bourlier ◽  
Amandine Tinghir ◽  
Philippe Masereel ◽  
Sylvie Baig
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Surface Water ◽  
Organic Carbon ◽  
Drinking Water Treatment ◽  
Resource Scarcity ◽  
Full Scale ◽  
Organic Matter Removal ◽  
Water Treatment Plants

Belgium is increasingly encountering drinking water problems because of resource scarcity and because of the quality of surface water from rivers and canal, which are often highly degraded. High organic matter concentrations are found and treated water has non-satisfying organic contents. This has a direct impact on THM formation and bacteria regrowth in the supply network. With more and more stringent regulations, organic matters concentration level in drinking water must be reduced. Nanofiltration (NF) is a suitable method for organic matter removal with reduction efficiency sometimes higher than 90 % (Orecki et al. 2004). It can be more effective than conventional technologies like activated carbon adsorption (Coté et al. 1996). This is a reason for upgrading old treatment plants by using NF treatment as a polishing step. Two drinking water treatment plants located in Eupen and La Gileppe in Belgium needed to be upgraded. These both plants treat surface water from dams and are equipped with a conventional clarification. A pilot study was carried out to compare different treatment files to remove Total Organic Carbon (TOC) and Biologically Degradable Organic Carbon (BDOC). NF process has been finally chosen. The aim of the paper is to report and discuss data supporting the choice of NF from pilot scale study and next full-scale performances of both upgraded drinking water treatment plants. The whole demonstrates the interest of NF as a suitable technology organic matter removal.

Relationship between di-(2-ethylhexyl) phthalate concentration and chemical structure of organic matter on solids in drinking water treatment processes

2004 ◽  
Vol 4 (5-6) ◽  
pp. 321-333 ◽  
Author(s):  
Y. Thaveemaitree ◽  
F. Nakajima ◽  
H. Furumai ◽  
S. Kunikane
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Toxic Substance ◽  
Drinking Water Treatment ◽  
Solid Particles ◽  
High Concentration ◽  
Fragment Composition ◽  
Treatment Processes ◽  
Ethylhexyl Phthalate

Di-(2-ethylhexyl) phthalate (DEHP), regarded as a toxic substance, is widely used and abundantly contaminated in environments. Via contamination of freshwater, DEHP can enter into drinking water treatment and be adsorbed on solid particles. This study was aimed at understanding the concentration phenomenon of DEHP in drinking water treatment process, focusing on the relationship between DEHP concentration and characteristics of organic matter on the solids formed in the processes as scum, suspended solid and sludge. Solid samples were collected from five drinking water treatment processes in Japan and analyzed by pyrolysis GC/MS. The solids were categorized by the sampling locations, solid types and fragment composition. The specificity of the pyrolysis fragments in each group was summarized into a matrix. When compared with concentration of DEHP and characteristics of organic matter, a solid specifically containing many specific aliphatic fragments contained significantly high concentration of DEHP.

Current knowledge in the field of algal organic matter adsorption onto activated carbon in drinking water treatment

2021 ◽  
pp. 149455
Author(s):  
Martin Pivokonsky ◽  
Ivana Kopecka ◽  
Lenka Cermakova ◽  
Katerina Fialova ◽  
Katerina Novotna ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Activated Carbon ◽  
Water Treatment ◽  
Current Knowledge ◽  
Drinking Water Treatment ◽  
Algal Organic Matter

Performance of conventional drinking water treatment following dispersant remediation of an oil spill in surface water

2021 ◽  
pp. 149583
Author(s):  
Oluchi Okoro ◽  
Isabelle Papineau ◽  
Morgan Solliec ◽  
Louis Fradette ◽  
Benoit Barbeau
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Surface Water ◽  
Oil Spill ◽  
Drinking Water Treatment

scholarly journals First Derivative UV Spectra of Surface Water as a Monitor of Chlorination in Drinking Water Treatment

2001 ◽  
Vol 1 ◽  
pp. 39-43 ◽  
Author(s):  
V. Zitko
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Surface Water ◽  
Distribution System ◽  
Drinking Water Treatment ◽  
Uv Spectra ◽  
Free Chlorine ◽  
Residual Chlorine ◽  
First Derivative ◽  
Derivative Spectra

Many countries require the presence of free chlorine at about 0.1 mg/l in their drinking water supplies. For various reasons, such as cast-iron pipes or long residence times in the distribution system, free chlorine may decrease below detection limits. In such cases it is important to know whether or not the water was chlorinated or if nonchlorinated water entered the system by accident. Changes in UV spectra of natural organic matter in lakewater were used to assess qualitatively the degree of chlorination in the treatment to produce drinking water. The changes were more obvious in the first derivative spectra. In lakewater, the derivative spectra have a maximum at about 280 nm. This maximum shifts to longer wavelengths by up to 10 nm, decreases, and eventually disappears with an increasing dose of chlorine. The water treatment system was monitored by this technique for over 1 year and changes in the UV spectra of water samples were compared with experimental samples treated with known amounts of chlorine. The changes of the UV spectra with the concentration of added chlorine are presented. On several occasions, water, which received very little or no chlorination, may have entered the drinking water system. The results show that first derivative spectra are potentially a tool to determine, in the absence of residual chlorine, whether or not surface water was chlorinated during the treatment to produce potable water.

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