Publications
410 results found
Tay JH, Chen XG, Jeyaseelan S, et al., 2001, Optimising the preparation of activated carbon from digested sewage sludge and coconut husk, CHEMOSPHERE, Vol: 44, Pages: 45-51, ISSN: 0045-6535
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- Citations: 112
Tay JH, Chen XG, Jeyaseelan S, et al., 2001, A comparative study of anaerobically digested and undigested sewage sludges in preparation of activated carbons, CHEMOSPHERE, Vol: 44, Pages: 53-57, ISSN: 0045-6535
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- Citations: 53
Graham N, Paraskeva P, 2001, Recent studies of ozone disinfection of secondary municipal effluents, International Ozone Association 15th world congress, London, UK, 11 - 15 September 2001, Pages: 276-291
Graham N, Chen XG, Jayaseelan S, 2001, The potential application of activated carbon from sewage sludge to organic dyes removal, 1st World Water Congress of the International-Water-Association (IWA), Publisher: I W A PUBLISHING, Pages: 245-252, ISSN: 0273-1223
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- Citations: 51
Jankovic-Nisic B, Maksimovic C, Butler D, et al., 2001, Effects of consumption uncertainty on positioning and sampling frequency of flow meters for operational management, IWA Biennial Conference, Berlin, 2001
Covas D, Stoianov I, Graham N, et al., 2001, Leakage detection in pipeline systems by inverse transient analysis: from theory to practice, CCWI2001
Graham N, Paraskeva P, 2001, Water quality considerations in the disinfection of secondary municipal effluents (Available on CD-ROM), 3rd international symposium on environmental hydraulics, Phoenix, USA, 5 - 8 December 2001
Stoianov I, Karney B, Covas D, et al., 2001, Wavelet processing of transient signals for pipeline leak location and quantification, International conference on computing and control for the water industry (CCWI 2001), Leicester, UK, 3 - 5 September 2001, Pages: 65-76
Jankovic-Nisic B, Maksimovic C, Butler D, et al., 2001, Effect of consumption uncertainty on positioning and sampling frequency of flow meters for operational management, Proceedings of IWA specialized conference system approach to leakage control and water distribution systems management, Brno, Czech Republic, 2001, Pages: 42-49
Ma J, Graham N, 2001, A comparison of Mn-O3 and H2O2-O3 for the degradation of atrazine, International Ozone Association 15th world congress, London, UK, 11 - 15 September 2001, Pages: 117-130
Graham N, Chen XG, Jayaseelan S, 2001, The potential application of activated carbon from sewage sludge to organic dyes removal., Water Sci Technol, Vol: 43, Pages: 245-252, ISSN: 0273-1223
The objective of this research work was to study the potential application of activated carbon from sewage sludge to organic dye removal. Methylene blue and crystal violet were the two dyes investigated in the present study. Three activated carbons were produced from the exclusive sewage sludge (referred to as DS), the sludge with the additive of coconut husk (DC) and sludge with the additive of peanut shell (DP) respectively. They were characterized by their surface area and porosity and their surface chemistry structure. Adsorption studies were performed by the batch technique to obtain kinetic and equilibrium data. The results show that the three sludge-derived activated carbons had a developed porosity and marked content of surface functional groups. They exhibited a rapid three-stage adsorption process for both methylene blue and crystal violet. Their adsorption capacities for the two dyes were high, the carbon DP performed best in the adsorption whereas the carbon DC performed worst. It is therefore concluded that the activated carbons made from sewage sludge and its mixtures are promising for dye removal from aqueous streams.
Hall T, Camm R, Currie M, et al., 2001, Pre-oxidation for enhancement of particle removal in water treatment filtration, Advances in rapid granular filtration in water treatment, Publisher: Chartered Institution of Water and Environmental Management, Pages: 33-46
Graham NJD, 2001, Ozone disinfection and treatment of municipal wastewater effluents, 1st forum of China young leading scholars in environmental science & engineering, Shenzhen, P.R.China, 19 - 22 June 2001
Currie M, Graham N, Hall T, et al., 2001, Mechanisms of particle removal enhancement in water treatment by pre-ozonation, International Ozone Association 15th world congress, London, UK, 11 - 15 September 2001, Pages: 134-147
Graham NJD, 2001, Improving sustainability and quality in urban drinking water supplies, 2001 international conference and exhibition on sustainable development and green enterprises, Macau, China, 1 - 3 November 2001, Pages: 227-238
Ma J, Graham NJD, 2000, Degradation of atrazine by manganese-catalysed ozonation - Influence of radical scavengers, WATER RESEARCH, Vol: 34, Pages: 3822-3828, ISSN: 0043-1354
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- Citations: 296
Paraskeva P, Lambert SD, Graham NJD, 1999, Ozone treatment of sewage works' final effluent, JOURNAL OF THE CHARTERED INSTITUTION OF WATER AND ENVIRONMENTAL MANAGEMENT, Vol: 13, Pages: 430-435, ISSN: 0951-7359
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- Citations: 4
Ma J, Graham NJD, 1999, Degradation of atrazine by manganese-catalysed ozonation: Influence of humic substances, WATER RESEARCH, Vol: 33, Pages: 785-793, ISSN: 0043-1354
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- Citations: 225
Graham NJD, 1999, Removal of humic substances by oxidation/biofiltration processes - A review, IAWQ/IWSA International Conference on Removal of Humic Substances from Water, Publisher: IWA PUBLISHING, Pages: 141-148, ISSN: 0273-1223
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- Citations: 70
Jiang JQ, Graham NJD, 1998, Preparation and characterisation of an optimal polyferric sulphate (PFS) as a coagulant for water treatment, JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, Vol: 73, Pages: 351-358, ISSN: 0268-2575
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- Citations: 66
Johnson P, Graham N, Dawson M, et al., 1998, Determining the optimal theoretical residence time distribution for chlorine contact tanks, JOURNAL OF WATER SERVICES RESEARCH AND TECHNOLOGY-AQUA, Vol: 47, Pages: 209-214, ISSN: 0003-7214
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- Citations: 8
Ojha CSP, Graham NJD, 1998, Use of recursive algorithms in slow sand filter operation, INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES, Vol: 5, Pages: 236-239, ISSN: 0971-4588
Jiang JQ, Graham NJD, 1998, Pre-polymerised inorganic coagulants and phosphorus removal by coagulation - A review, WATER SA, Vol: 24, Pages: 237-244, ISSN: 0378-4738
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- Citations: 170
Luxton PJ, Graham NJD, 1998, Preliminary evaluation of natural fabrics in slow sand filtration, JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA, Vol: 47, Pages: 95-106, ISSN: 0003-7214
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- Citations: 1
Paraskeva P, Lambert SD, Graham NJD, 1998, Influence of ozonation conditions on the treatability of secondary effluents (Reprinted from The Role of Ozone in Wastewater Treatment, 1997), OZONE-SCIENCE & ENGINEERING, Vol: 20, Pages: 133-150, ISSN: 0191-9512
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- Citations: 22
Beaman MS, Lambert SD, Graham NJD, et al., 1998, Role of ozone and recirculation in the stabilization of landfills and leachates (Reprinted from The Role of Ozone in Wastewater Treatment, 1997), OZONE-SCIENCE & ENGINEERING, Vol: 20, Pages: 121-132, ISSN: 0191-9512
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- Citations: 12
Jiang JQ, Graham NJD, 1998, Observations of the comparative hydrolysis/precipitation behaviour of polyferric sulphate and ferric sulphate, WATER RESEARCH, Vol: 32, Pages: 930-935, ISSN: 0043-1354
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- Citations: 86
Jiang JQ, Graham N, 1998, Clearly cleaner, CHEMISTRY IN BRITAIN, Vol: 34, Pages: 38-+, ISSN: 0009-3106
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- Citations: 6
Paraskeva P, Lambert SD, Graham NJD, 1998, Influence of Ozonation Conditions on the Treatability of Secondary Effluents, Ozone: Science and Engineering, Vol: 20, Pages: 133-150, ISSN: 0191-9512
With Permission of : Imperial College of Science, Technology and Medicine Centre for Environmental Control & Waste Management, London, SW7 2BU, UK Copyright © 1998 With the adoption of European Community Directives regarding bathing water quality and the potential extension of bathing waters standards to all recreational waters, the disinfection of wastewater effluents has become an option of increasing interest. Ozone is a very powerful oxidant, capable of fast and effective disinfection. Due to its oxidizing potential, its application to final municipal effluents could have a beneficial effect on the effluent quality, although some concerns exist over the formation of potentially harmfUl by-products such as organic halides. This paper describes a preliminary laboratory-based study designed to investigate the changes in the physico-chemical properties of a secondary municipal effluent after ozonation, as well as the effect of ozone on the concentration of organic halides and effluent toxicity. The treatability and the performance of the system for different methods of ozone application also is evaluated. The effluent was treated with ozone generated from air and from oxygen. Using oxygen as a feed gas, three different ozone concentrations in the gas were examined, namely 1.5% w/w, 4.5% w/w and 13.5% w/w. The results showed that ozone affected the physico-chemical properties of the effluent by reducing the COD, BOD5 and color concentrations, and by increasing the dissolved oxygen concentration of the effluent. In the ozone dose range likely to be applied for disinfection, the amount of halogenated organic species increased. This increase, however, was not associated with changes in toxicity. At higher ozone doses, the organic halide concentration was found to decrease, whereas toxicity, although undetectable with the use of standard protocols, was found to increase. For a constant ozonation rate, the treatment performance was similar for all ozonation condi
Churchley JH, Lambert SD, Graham NJD, 1998, Ozone for dye waste color removal : Four years operation at leek STW, Ozone: Science and Engineering, Vol: 20, Pages: 111-120, ISSN: 0191-9512
The problems caused by discharges of colored dye waste into the sewer are described. Coloration of the River Chumet by the Leek Sewage Treatment Works (STW) effluent necessitated the setting of color discharge consent conditions by the National Rivers Authority (now the Environment Agency). These and other tightened consent conditions led to the planning of a major works extension to give an extensive flow sheet unique to the UK. The conceptual design is described, together with four years operating data. The extended plant has performed extremely well since October 1992, and in particular the ozonation process has given excellent color removal. Resulting improvements in the downstream water quality of the River Churnet have been demonstrated by the lack of public complaint and by the return of trout and chub. Copyright © 1998.
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