Autotrophic deep bed filter using novel composite filler

Abstract

The invention discloses an autotrophic deep bed filter using a novel composite filler. A water inlet end and a back washing water outlet end are formed in the upper part of the autotrophic deep bed filter using the novel composite filler, wherein a water distribution ditch is mounted at the water inlet end; a back washing water outlet ditch is mounted at the back washing water outlet end; a filtering material layer, a bearing layer and a filtering brick layer are arranged in the filter in sequence from top to bottom; a gas distribution and water distribution system is connected to the filtering brick layer; filtering material intercepting devices are arranged between the water distribution ditch and the filter and between the back washing water outlet ditch and the filter; and the filler of the filtering material layer is an electronic slow release type filler formed by processing sulphur-iron composite ores. The autotrophic deep bed filter using the novel composite filler, disclosed by the invention, has the advantages that an organic carbon source does not need to be added because a deep-bed denitrifying filter with the novel sulphur-iron composite ore filtering material as the filler is adopted, and a problem of COD secondary pollution can be effectively solved.

Description

technical field

[0001] The invention relates to the field of sewage treatment and advanced sewage treatment technology, in particular to a self-supporting deep bed filter adopting a novel composite filler. Background technique

[0002] Nitrogen pollution in sewage has always been the focus of water pollution prevention and control.

[0003] At present, the more economical denitrification technology is biological denitrification technology. Biological denitrification is mainly through the ammoniation, nitrification and denitrification of microorganisms to remove nitrogen. Denitrification can be divided into two types: heterotrophic and autotrophic. Heterotrophic denitrification is a process in which heterotrophic microorganisms use organic carbon sources as electron donors and nitrate as electron acceptors to reduce nitrate to nitrogen through biological reduction. Autotrophic denitrification refers to the utilization of inorganic carbon (CO 2 、HCO 3 - , CO 3 2- ) as ...

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