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  • Articles  (63,231)
  • 1990-1994  (63,231)
  • Energy, Environment Protection, Nuclear Power Engineering  (63,231)
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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The reconstruction of 8.1 km of dilapidated sea wall protecting the Hampshire coast of the Western Solent, near Lymington, presented the National Rivers Authority (Southern Region) with particular problems and substantial extra costs in coping with the needs of conservation. The resulting scheme, however, can be seen not only to have preserved but also enhanced the conservation value of its immediate surroundings in addition to the wider area of protected land.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Osaka has nearly completed its sewerage system, and twelve sewage-treatment works are now in operation. Tsumori and Ebie works, the two oldest, were commissioned in 1940. For these works, full-scale reconstruction has just commenced.This paper reports on the reconstruction of the Tsumori works, and outlines the plan for future reconstruction of the city's sewage-treatment works.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The pesticides prometryn and terbutryn are shown to be broken down by the chlorination process. The reaction is rapid and pH-dependent. By analogy, a number of similar compounds are expected to be affected in the same way. The importance of considering the breakdown products of pesticides is discussed.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Increasing restrictions on sewage sludge disposal routes and the tightening of treatment requirements have led to an escalation of sludge-disposal costs which are out of proportion to other sewage-treatment costs: consequently reducing sludge volume is becoming increasingly cost-effective. Consolidation of anaerobically digested sludge has traditionally been difficult and takes many weeks in secondary digesters or deep storage tanks. Pre-aeration of the sludge using the Aercon process can enable consolidation to take place in days instead of weeks.This paper reports the results of a pilot-scale plant designed to investigate further the mechanism by which aeration speeds up consolidation. It was concluded that the rate of consolidation depended on aeration intensity and cooling of the sludge. Inhibition of anaerobiosis was more important than gas stripping in enhancing consolidation.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: During the long-distance pressure transportation of sewage, the interior of a rising main tends to become anaerobic, thereby producing a large amount of hydrogen sulphide at manholes and terminals. High concentrations of hydrogen sulphide have become a serious environmental and maintenance problem.In order to prevent the production of hydrogen sulphide in rising mains, the City of Kobe (in Japan) introduced a system to inject air directly into the main.This paper describes the results of studies on the effect of air injection on hydrogen sulphide inhibition and the relationship between water quality and the amount of air injected.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The construction of a road, runway or other paved surface on the outcrop of an aquifer introduces an impermeable area into an otherwise permeable environment. Surface water must be drained from these areas, and the most convenient and inexpensive way of disposing of this water is usually to lead it into soakaways in the unsaturated zone of the aquifer. This approach is acceptable in that it can provide valuable recharge to aquifers in times of low rainfall. However, it carries the risk that pollutants from the surface can also be carried into the aquifer. These pollutants can be generated from (a) normal abrasion, (b) maintenance operations such as de-icing and defoliation, and (c) accidental spillages. Although there is evidence that such drainage can carry a pollutant load, and that drainage entering soakaways can reach a public- supply well, there does not seems to be any evidence available at present of any public supply in the UK being seriously affected by such drainage.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The consent for the discharge of effluent is a contract between the discharger and the regulator. Its purpose is reviewed and compared with effluent performance characteristics. The evolvement of consent conditions and compliance assessment in Scotland is described, together with the challenge posed by the need to implement the urban waste water treatment Directive. A new framework for the consent contract is proposed for sewage and industrial discharges, which clearly prescribes the required effluent performance, authorizes non-compliance, and embodies an explicit assessment of compliance.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: This paper details a study to investigate the feasibility of continuously monitoring dissolved methane concentrations in groundwater. Diffusion cells have previously been used to measure methane in water but only at very shallow depths, due to the limitations of calibrations at pressures greater than atmospheric. The feasibility of using diffusion cells to determine dissolved methane at greater depths within a borehole has been established by conducting a series of laboratory experiments with a pressurized ‘bomb’. The diffusion cells have been calibrated for a range of pressures, equivalent to a depth of 90 m below water level, and dissolved methane concentrations (0–100%).Further equipment is required and a suitable site has to be identified before field trials are performed. It should then be possible to determine the concentration of dissolved methane at depth within a borehole or reservoir, by (a) installing diffusion cells, (b) monitoring the carrier gas emissions, and (c) back-calculating the data to determine in situ concentrations of dissolved methane.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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