Industrial wastewater advanced total nitrogen removal treatment process and denitrification device thereof

Abstract

The invention relates to an industrial wastewater advanced total nitrogen removal treatment process, which comprises the following steps: 1) industrial wastewater enters a pre-denitrification contact tank after passing through a mixer, water needs to be uniformly distributed in the tank, and meanwhile, a combined filler is arranged in the tank; (2) the wastewater in the step (1) enters a carbon oxidation nitration filter tank, an aeration device is arranged in the carbon oxidation nitration filter tank, and a biological ceramsite filler layer is arranged in the carbon oxidation nitration filter tank; (3) a backflow proportion is selected according to reaction effluent in the step (2), the wastewater flows back to the step (1) and is mixed with industrial wastewater for primary total nitrogen removal, and residual wastewater enters a rear denitrification filter tank; 4) a biological ceramsite filler layer is arranged in the rear denitrification filter tank, and an external carbon source is added; (5) the effluent in the step (4) enters a filter tank; and (6) effluent in the step (5) enters a catalytic ozonation pond, and selective starting is conducted. The invention also relates to a denitrification device for the treatment process, and the problem of deep denitrification in industrial wastewater can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to an industrial wastewater deep total nitrogen removal process and a nitrogen removal device thereof. Background technique [0002] As the country pays more and more attention to environmental pollution control and energy conservation and emission reduction, more attention is paid to the total nitrogen index, and many areas list it as a real-time monitoring item for effluent discharge. The high content of nitrogen cannot meet the increasingly stringent requirements of discharge standards, especially in the field of industrial wastewater treatment. Many factories have not considered the issue of total nitrogen removal before. [0003] The use of biological nitrification and denitrification treatment is the most effective and economical method for total nitrogen removal, but the traditional biochemical contact oxidation reaction process has limited effect on t...

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Problems solved by technology

[0002] As the country pays more and more attention to environmental pollution control and energy conservation and emission reduction, more attention is paid to the total nitrogen index, and many areas list it as a real-time monitoring item for effluent discharge. The content is high, which cannot meet the increasingly stringent requirements of discharge standards, especially in the field of industrial wastewater treatment. Many factories have not considered the issue of total nitrogen removal before.

[0003] The use of biological nitrification and denitrification treatment is the most effective and economical method for total nitrogen removal, but the traditional biochemical contact oxidation reaction process has limited effect on total nitrogen removal, and it is difficult to meet the advanced treatment requirements. Some municipal sewage plants use biological filters However, there are still many problems in using this method in industrial wastewater, such as the concentration of pollutants is too high, the removal effect is limited, and the filter is easy to block, etc.

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