Autotrophic deep bed filter using novel composite filler

A composite filler, autotrophic technology, applied in special compound water treatment, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve problems such as high cost and organic pollution, reduce sludge production, The effect of reducing energy consumption and avoiding secondary pollution problems

Pending Publication Date: 2019-02-22
BEIJING MECHANICAL BIOLOGICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, heterotrophic denitrification technology is widely used. This technology requires additional input of organic matter for carbon source supplementation, which is costly and brings new organic pollution.

Method used

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  • Autotrophic deep bed filter using novel composite filler
  • Autotrophic deep bed filter using novel composite filler
  • Autotrophic deep bed filter using novel composite filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A self-supporting deep bed filter using a new type of composite filler.

[0024] refer to figure 1 , the upper part of the filter is a water inlet and a backwash outlet respectively, wherein the water inlet is equipped with a water distribution channel 1, and the backwash outlet is equipped with a backwash outlet 6. Between the water distribution channel 1 and the filter tank, and between the backwash outlet channel 6 and the filter tank, a filter material intercepting device 7 is arranged to prevent the loss of the filter material during backwashing. A water inlet pipeline is arranged below the water distribution channel 1, and a backwash water inlet pipeline is arranged at the same time; a backwash outlet pipeline is arranged at the bottom of the backwash outlet channel 7, and an outlet pipeline is arranged on the right side of the backwash outlet channel 7.

[0025] The water distribution canal 1 of this embodiment adopts the water distribution of sub-unit channels....

Embodiment 2

[0038] Comparative Test.

[0039] Compared with the traditional heterotrophic deep bed filter:

[0040] The traditional deep bed filter uses gravel as the filter material, and realizes the denitrification treatment of sewage by adding carbon source. Compared with the more common heterotrophic deep bed filter with external carbon source, the deep bed denitrification filter using new sulfur-iron composite mineral filter material as filler does not need to add organic carbon source, which can effectively avoid the secondary pollution of COD. At the same time, the mud production is greatly reduced, which can reduce the frequency of backwashing and reduce energy consumption. At the same time, in terms of cost, the slow-release sulfur-iron composite filter material is cheaper than organic carbon sources, and it is easy to transport and store.

[0041] The main technical parameters:

[0042] Denitrification volume load: 600-900g / m 3 / d;

[0043] Sludge yield: 0.1g SS / g N;

[00...

Embodiment 3

[0050] Comparative Test.

[0051] Compared with the existing denitrification filter using sulfur ore or iron ore as filler.

[0052] The test structure is shown in Table 1 below.

[0053]

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
CPCC02F3/00C02F2203/006C02F2305/06
Inventor 王志立张梦竹李宝生
Owner BEIJING MECHANICAL BIOLOGICAL ENG
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