A method for treating inorganic wastewater containing ammonia nitrogen and sulfate based on sulfur cycle

A sulfate and ammonia nitrogen technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of excessive oxidation of elemental sulfur and difficult oxidation of sulfide, and reduce dependence , the effect of reducing power consumption

Active Publication Date: 2020-06-30
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology

At the same time, it is difficult to oxidize sulfide to the level of elemental sulfur by using sulfur autotrophic denitrifying microorganisms in the process of sulfur removal, and the phenomenon of excessive oxidation of elemental sulfur to sulfate often occurs

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  • A method for treating inorganic wastewater containing ammonia nitrogen and sulfate based on sulfur cycle

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Embodiment 1

[0022] A treatment method based on sulfur cycle to realize ammonia nitrogen and sulfate inorganic wastewater, including nitrification pond, nitrification sedimentation pond, anammox biofilm pond, sulfur autotrophic denitrification pond, desulfurization pond, photosynthetic sulfur oxidation pond , a solid-liquid separation tank, an ultrasonic crushing system and a reflux system, comprising the following steps:

[0023] S1. Using part of the nitrification tank, anammox biochemical membrane tank and sulfur autotrophic denitrification tank to form an autotrophic denitrification process to remove nitrogen from wastewater;

[0024] S2. Using the anti-sulfurization pool, photosynthetic sulfur oxidation pool and ultrasonic crushing system to realize the conversion and recovery of sulfate to elemental sulfur;

[0025] S3. Use the remaining sludge in the sewage treatment process as the organic carbon source for anti-sulfurization, and use photosynthetic sulfur bacteria to finally store ...

Embodiment 2

[0029] On the basis of Example 1, in this embodiment, a sub-digestion reactor is set in the nitrosation tank, and the sub-digestion reactor reacts all the ammonia nitrogen in 50% of the waste water in combination with oxygen, converts it into nitrite, and The mud-water separation is realized in the sedimentation tank, and the water enters the anammox biofilm tank; the remaining 50% of the waste water is sent to the anammox biofilm tank, and the anammox biofilm tank is equipped with a biofilm anammox reactor. The ammonia nitrogen and nitrite produced in the nitrification tank are converted into nitrogen gas, and a small amount of nitrate produced in the reaction process flows into the sulfur autotrophic denitrification tank. The sulfur autotrophic denitrification tank is equipped with an autotrophic denitrification reactor, and the autotrophic denitrification reaction The device uses the sulfide in the subsequent desulfurization tank to convert nitrate into nitrogen, and simulta...

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Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a sulfur circulation based treatment method for inorganic wastewater containing ammonia nitrogen and sulfate. According to the method, a nitrosation tank, a nitrosation sedimentation tank, an anaerobic ammonia oxidation biofilm tank, a sulfur autotrophic denitrification tank, a disulfide tank, a photosynthetic sulfur oxidation tank, a solid-liquid separation tank, an ultrasonic crushing system and a reflux system are included. The method has the beneficial effects that the autotrophic biological denitrificationprocess with anaerobic ammonia oxidation as the core is adopted to realize removal of ammonia nitrogen in wastewater, only general ammonia nitrogen needs to be oxidized to nitrite level, and accordingly, power consumption required by aeration in the aerobic section of the denitrification process is greatly reduced, and dependence of the denitrification process on organic matter is also reduced; in the process of sulfur removal, original microorganisms in sludge are used as organic matter to realize conversion of sulfate into sulfide, and photosynthetic purple sulfur bacteria are used for oxidizing sulfide to elemental sulfur which is stored in cells, so that the process is stable and easy to control.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a treatment method for realizing inorganic waste water containing ammonia nitrogen and sulfate based on sulfur circulation. Background technique [0002] Ammonia nitrogen and sulfate are a type of inorganic wastewater produced in the process of fertilizer, coking, petrochemical, pharmaceutical and food production. If the ammonia nitrogen and sulfate wastewater is discharged into the water body, it will cause eutrophication of the water body, and cause the water body to be black and smelly, which not only increases the difficulty of water body treatment, but also increases the cost of water body treatment. Nitrogen desulfurization treatment. [0003] The biological treatment of wastewater has always been considered the most economical treatment method. Traditional ammonia and sulfate wastewater generally adopts the traditional nitrification and denitrificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34C12P3/00C02F101/10C02F101/16
CPCC02F3/302C02F3/307C02F3/34C02F2101/101C02F2101/16C12P3/00
Inventor 袁砚李勇李祥
Owner SUZHOU UNIV OF SCI & TECH
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