Manganese Based Performance Model for MnOx(s) Media Treating Soluble Iron and Manganese
Author : Paul E. Check
Publisher :
Page : 194 pages
File Size : 45,34 MB
Release : 2002
Category :
ISBN :
Author : Paul E. Check
Publisher :
Page : 194 pages
File Size : 45,34 MB
Release : 2002
Category :
ISBN :
Author : American Water Works Association
Publisher : American Water Works Association
Page : 328 pages
File Size : 27,77 MB
Release : 1990
Category : Sequestration (Chemistry)
ISBN : 0898675103
Author : William R. Knocke
Publisher :
Page : 116 pages
File Size : 45,97 MB
Release : 1990
Category : Manganese oxides
ISBN : 9780898675085
Author :
Publisher : American Water Works Association
Page : 179 pages
File Size : 44,14 MB
Release : 2008-01-01
Category : Water
ISBN : 9781605730141
Author :
Publisher :
Page : 962 pages
File Size : 26,26 MB
Release : 1991
Category : Hydrology
ISBN :
Author : Dirk Vries
Publisher :
Page : pages
File Size : 27,58 MB
Release : 2016
Category :
ISBN :
Author : J.H. Bruins
Publisher : CRC Press
Page : 162 pages
File Size : 23,24 MB
Release : 2017-03-16
Category : Technology & Engineering
ISBN : 1351652508
In The Netherlands, Belgium and other European countries, manganese is removed by conventional groundwater treatment with aeration and rapid (sand) filtration. Such a treatment process is easy to operate, cost effective and sustainable, because it does not make use of strong oxidants such as O3, Cl2, ClO2 and KMnO4 with the associated risk of by-product formation and over or under dosing. However, application of aeration-filtration is also facing drawbacks, especially the long ripening time of filter media. Due to the long ripening time, water companies have to waste large volumes of treated water, making this process less sustainable. Also, costs associated with filter media ripening (man power, electricity, operational and analysis costs) are high. Therefore decreasing the filter ripening time, regarding manganese removal is a big issue. Although already extended research has been carried out into manganese removal, the controlling mechanisms, especially of the start up face of filter media ripening, are not fully understood yet. The emphasis of this thesis is to provide a better understanding of the mechanisms involved in the ripening of virgin filter media, regarding manganese removal and how to shorten or completely eliminate the long ripening period of filters with virgin material. This thesis therefore highlights the role of the formation of a manganese oxide coating on virgin filter media. Characterization and identification revealed that the responsible manganese oxide for an effective manganese removal was Birnessite. It was found that Birnessite, formed at the beginning of the ripening process was of a biological origin. Based on the knowledge that manganese removal in conventional groundwater treatment is initiated biologically, long ripening times may be reduced by creating conditions favouring the growth of manganese oxidizing bacteria, e.g., by limiting the back wash frequency and / or intensity. Additionally, this thesis also shows that the use of freshly prepared manganese oxide, containing Birnessite, can completely eliminate filter media ripening time.
Author : Paul M. Kohl
Publisher : American Water Works Association
Page : 460 pages
File Size : 12,40 MB
Release : 2006
Category : Drinking water
ISBN : 1583215042
This research study describes the chemistry and suggested treatment of manganese in drinking water, with the goals of reducing customer complaints and improving perceived water quality. The problems are aesthetic-water discoloration (usually black or dark red), clothing and fixture staining, turbid water sediments, and, at very high levels, metallic taste.
Author : Peter B. Merkle
Publisher :
Page : 520 pages
File Size : 24,92 MB
Release : 1995
Category :
ISBN :
Author : Alyson McCann
Publisher :
Page : 4 pages
File Size : 27,59 MB
Release : 1994
Category : Drinking water
ISBN :