ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01221.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01222.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01223.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SYNOPSISAlaboratory‐scalelead‐pipe rig has been developed into an accelerated test for ‘plumbosolvency propensity’. High alkalinity water supplies from Anglian Water show either relatively high or low propensity characteristics which appear to be related to the form of the crystal deposit. These have been examined by scanning electron microscopy. The paper describes the uses of the test to (1) supplement random survey data, (2) investigate mixed waters, and (3) optimize orthophosphate

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01224.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01225.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SYNOPSISThe paperoutlines the operational experience gained on a number of combined heat and power (CHP) schemes within Wessex Water. Application philosophy is discussed with particular emphasis on economic viability. Capital and revenue costs are presented, together with details of performance. The use of a performance guarantee contract with suppliers is demonstrated and possibilities for future improvements are suggested.

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01226.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SYNOPSISThe paperdescribes the refinement and application of a mathematical model to investigate the hydraulic design features of a chlorine contact tank. The mathematical model study is an extension of a previous theoretical and laboratory model study, where the main objectives were to modify the flow through features of an existing chlorine contact tank, in order to reduce the effect of short circuiting and the existence of dead space zones. Flow through curves for a plug source input were obtained from the two‐dimensional depth averaged mathematical model simulations, with the predicted outflow tracer time variations being compared with the corresponding laboratory model results and field data.These comparisons were undertaken for several contact tank configurations, with encouraging agreement being obtained between the predicted and measured results for the original tank configuration. However, the agreement between both sets of results for the final tank configuration was not as good, due to the inability of the mathematical model to reproduce adequately complex three‐dimensional flow featu

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01227.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SYNOPSISAs a consequenceof severe flooding in May 1979 and resultant public pressure, Wessex Water prepared an outline flood alleviation scheme for the river Brit at Bridport, Dorset. Restrictions in capital investment necessitated the works being undertaken in six stages.The river system through the urban area was mathematically modelled using Hydraulic Research's FLUCOMP 1, which demonstrated that flood alleviation works could be carried out in the very restricted valley bottom. In order to confirm design assumptions a physical model of the most restricted area was commissioned from Hydraulics Research Ltd (HR).The paper demonstrates the benefit of close liaison between designers and modellers to ensure that the most cost‐effective and technically feasible scheme is provide

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01228.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SYNOPSISThis paperreports on an investigation into the efficient routing of sample collection in the Lincoln Division of Anglian Water. Samples have to be collected from more than 600 sample points across three functions and at frequencies ranging from daily to once in two years. The organization of this activity is clearly complex.As a result of the review carried out using manual methods, the additional 15 000 water samples which are required annually are now being collected with no increase in staff resources. The scale of the effort required for this review prevents it from being repeated except at infrequent intervals; yet without frequent reviews the efficiency of routes is eroded as the required pattern of samples changes. A computer system is therefore being developed, offering the prospect of halting the drift away from efficiency and the speedy evaluation of alternative strategies.

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01229.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

SYNOPSISThe paperoutlines the development of a sludge disposal strategy for the City of Coventry, from 1939 onwards. The aim of the paper is to show how a fundamental change in philosophy from gravity thickening to mechanical dewatering led to the construction of a £1.5 million dewatering plant. It provides a detailed appraisal of the first year of operation, and attempts to identify the major problem areas which led to plant performance failing to achieve expectations. The concluding paragraphs describe the on‐site work which is currently being undertaken, the results of which will eventually dictate the most suitable operational opti

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1987.tb01230.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY