Wastewater Treatment and Sewerage
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Impact of Intermittent Discharges on the Microbiological Quality of Shellfish
Price: £50
Ref: 07/WW/18/1
ISBN: 1 84057 438 0
Laboratory and field investigations examined sewage effluent impact on microbiological shellfish hygiene parameters (faecal indicator organisms). Shellfish types examined were: wild mussels (Mytilus edulis) (all investigations) and Pacific oysters (Crassostrea gigas) (laboratory only).
The investigations demonstrated rapid uptake of organisms following contamination, producing flesh concentrations exceeding those recommended for human consumption (>46,000 Escherichia coli/100 g). Decay functions were fitted to subsequent depuration patterns.
In microcosms, mussels showed: (i) higher concentrations following contamination and (ii) more rapid depuration than oysters. Concentrations in flesh were correlated with those in overlying water (r>0.87). In the field, response was similar irrespective of overflow spill magnitude. Depuration was slower and statistical relationships between concentrations in shellfish and overlying water were weaker (r<0.66).
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The Environmental Impact of Phosphorus from the Agricultural Disposal of Sewage Sludge - Stage 3
97/SL/02/4 - ISBN: 1 84057 013 XLaboratory, lysimeter and field studies continue to show wide variability the potential bioavailability of phosphorus in sewage sludge. Under operational rates of application, losses of phosphorus in run-off from plots recei... More...
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Capital Maintenance Planning: Failure Data and Analysis Methodology for Water Mains
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Acceptability of Water to Customers
07/CU/02/3 - ISBN: 1 84057 433 XAn approach to formulating interventions and seeking funding to address aesthetic aspects of drinking water quality is considered. These aspects include discolouration and particles; taste and odour; and hardness. Guidance is... More...
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Estimating Legitimate Non- Household Night Use Allowances
99/WM/08/26 - ISBN: 1 84057 165 9This study has produced a robust and generalised methodology that can be used by individual companies to more accurately determine legitimate non-household metered use. This should improve the accuracy of regulatory reporting... More...
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