Natural rubber processing wastewater deep biological denitrogenation apparatus and method

Abstract

The invention discloses a natural rubber processing wastewater deep biological denitrogenation apparatus and a method thereof. wastewater firstly enters an anaerobic methane production reactor, and lots of organic matter in the wastewater is converted into CH4 to be released; then, in the low-oxygen biosorption section of an organic matter removal reactor, remaining organic matter in the wastewater is adsorbed into sludge; after sludge-water separation through a No.1 sedimentation basin, the deposited sludge part flows back to a high-oxygen bioregeneration section, organic matter in the sludgeis fully subjected to aeration and degradation, a supernatant in the sedimentation basin enters an AOAO reactor to undergo denitrification, anaerobic ammoxidation and nitration so as to achieve deepbiological denitrogenation; wastewater enters a No.2 sedimentation basin to undergo water-sludge separation, the supernatant is discharged, and part of the supernatant flows back as a nitration solution; part of deposited sludge in the No.1 and No.2 sedimentation basins enter an acid production tank to be fermented so as to generate volatile organic acid (VFAs), and a fermentation broth containingVFAs can be used as a high-quality carbon source for denitrification of the AOAO reactor. The above apparatus can reinforce deep nitrogen removal and also reduce energy consumption of the system andachieve energy recovery.

Description

technical field [0001] The invention relates to a deep biological denitrification device and method for natural rubber processing wastewater, belonging to the technical field of sewage biological treatment. Background technique [0002] Rubber is divided into natural rubber and synthetic rubber. Natural rubber has good processing performance, good flex resistance, air permeability, and electrical properties, and is superior to synthetic rubber. It is a kind of rubber that is widely used in the market. According to different processing techniques, natural rubber can be divided into natural raw rubber and concentrated latex. Natural raw rubber raw wastewater mainly comes from washing clots and mechanical water for rubber making. Since ammonia water is used as latex preservative in the production process, and formic acid is used to coagulate latex, the potential pollutants of the wastewater are mainly soluble organic matter, ammoniacal nitrogen, etc.; The processing wastewater...

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Problems solved by technology

However, the above-mentioned biological treatment process has many disadvantages, for example: the oxidation pond treatment occupies a large area, the investment and construction costs are high, and it is easy to generate odor that affects the living environment of residents; the activated sludge aeration process has high energy consumption and increases the operating cost of enterprises

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