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Abstract Raw waters polluted with nitrate present serious problems to drinking water source of many countries. Heterotrophic denitrification is one of the main techniques to remove nitrate from water. Adopting economic solid organic carbon sources, such as cotton, wheat straw and so on, can cut down the running cost of denitrification. But it is possible to deteriorate the quality of water when removing nitrate from drinking water. Denitrification system using biodegradable polymers (BDPs) as carbon sources and biofilm carriers has perfect ability to adapt to the shock of influent water quality and it is impossible to pollute the water for the reason that they are no harm to human health. With the development of new kinds of BDPs material and the decline of BDPs cost, BDPs may get more and more attention in drinking water denitrification.
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Received: 21 September 2005
Published: 25 February 2006
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