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- W2186200805 abstract "Note: The following is the notation used in this paper: ( . ) for decimals and ( ) for thousands. Summary Collaborative research into the effect of ground source heat pump coils on water quality has been pursued during the last four years. The use of permeable pavement systems with integrated ground source heat pumps for the treatment and recycling of urban runoff is novel and timely due to increase interest in sustainability. This study assesses the efficiency of the combined technology in controlled indoor and uncontrolled outdoor experimental rigs comprising six simulated pavement systems of which some receive diluted gully pot liquor spiked with dog droppings. The heating and cooling modes of a ground source heat pump when regulating a building’s temperature have a profound effect on the water temperature within the sub-base region of Aquaflow permeable paving. The research described here has shown that despite an increase in pavement water temperature of up to 25°C, when the paving is used as a heat sink to cool a building, the differences between most water quality variables in heating and cooling modes are relatively small. The importance of the geotextile layer in regulating water quality and the ‘polishing’ of stored water whilst retained in the sub-base was assessed. Mean removal rates of 99% for biochemical oxygen demand, 95% for ammonia-nitrogen and 96% for orthophosphate-phosphates were recorded. The microbiological water quality is also good despite an expected increase in the growth of potentially pathogenic bacteria due to warmer water. The presence of Legionella bacteria was rare and correlated more closely with organic contaminants than with changes in stored water temperature. No long-term survival of Salmonella spp., Escherichia coli, faecal Streptococci and Legionella was noted. It is hoped that this work will remove some of the concerns about the quality of water stored within permeable paving systems and show that innovative heating solutions do not necessarily lead to a decrease in water quality within permeable pavements." @default.
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- W2186200805 date "2009-01-01" @default.
- W2186200805 modified "2023-09-27" @default.
- W2186200805 title "WATER STORED WITHIN PERMEABLE PAVING AND THE EFFECT OF GROUND SOURCE HEAT PUMP APPLICATIONS ON WATER QUALITY" @default.
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