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Method for treating wastewater containing high-concentration pyrazine

A high-concentration, waste water technology, applied in the direction of sedimentation treatment, multi-stage water treatment, water/sewage treatment, etc., to achieve the effect of improving biodegradability and good environmental effects

Inactive Publication Date: 2019-02-19
JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Deep oxidation at the end to completely remove all pollution indicators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] First, pass the pyrazine-containing food additive wastewater into the coagulation reaction tank I, adjust the pH to 9, add ferrous sulfate solution (addition amount 6g / L), polyacrylamide solution (mass concentration 0.05%, add amount 0.4mL / L), stirring and reaction for 0.5h; the effluent flows into the sedimentation tank I by itself for precipitation; the supernatant flows into the intermediate tank I by itself, and the sludge is transported to the physicochemical sludge tank; the intermediate tank water is sent to the high-temperature Fenton reaction device, and the temperature is controlled 50 ℃, adjust the pH to 4; add ferrous sulfate (addition amount 7.5g / L), 30% hydrogen peroxide (addition amount 30mL / L), stir the reaction for 2h; after the reaction, the effluent enters the coagulation reaction tank II, adjust the pH to 9 ; Add polyacrylamide (mass concentration 0.05%, dosing amount 0.4mL / L), stir and react for 0.5h; the effluent flows into the sedimentation tank II...

Embodiment 2

[0037] First, pass the pyrazine-containing food additive wastewater into the coagulation reaction tank I, adjust the pH to 10, add ferrous sulfate solution (addition amount 5g / L), polyacrylamide solution (mass concentration 0.05%, add amount 0.5mL / L), stirring reaction for 0.5h; the effluent flows into the sedimentation tank I by itself for precipitation; the supernatant flows into the intermediate tank I by itself, and the sludge is transported to the physicochemical sludge tank; the intermediate tank water is sent to the high-temperature Fenton reaction device, and the temperature is controlled 55 ℃, adjust the pH to 5, add ferrous sulfate (addition amount 7g / L), 30% hydrogen peroxide (addition amount 25mL / L), stir and react for 2h; after the reaction, the effluent enters the coagulation reaction tank II, adjust the pH to 10. A small amount of polyacrylamide (mass concentration 0.05%, dosage 0.5mL / L), stir and react for 0.5h; the effluent flows into the sedimentation tank II ...

Embodiment 3

[0039] Step 1: Pass the pyrazine-containing wastewater into the coagulation reaction tank I, adjust the pH to 9-10, add 5g / L ferrous sulfate and 0.05% mass concentration, and add 0.3mL / L poly Acrylamide solution, stirred for 0.5h;

[0040] Step 2: In step 1, the effluent flows into the sedimentation tank I by itself for precipitation; the supernatant flows into the intermediate tank I by itself, and the sludge is deposited and transported to the physical and chemical sludge thickening tank;

[0041] Step 3: Send the above-mentioned intermediate pool I water body into the high-temperature Fenton reaction device, control the temperature to 40-60℃, adjust the pH to 3, add 6g / L ferrous sulfate and 30% mass concentration, and add 25mL / L hydrogen peroxide, stirred for 2h;

[0042] Step 4: After the reaction of step 3, the effluent enters the coagulation reaction tank II, adjust the pH to 9-10, add the mass concentration of 0.05%, the dosing amount of 0.3mL / L polyacrylamide solution, stir...

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PUM

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Abstract

The invention discloses a method for treating wastewater containing high-concentration pyrazine, which belongs to the field of sewage treatment methods. The method for treating the wastewater containing the high-concentration pyrazine is characterized in that most of suspended impurities in the wastewater are firstly removed by introducing the high-concentration pyrazine wastewater into a coagulation reaction tank I; after the coagulation reaction, effluent passes through a sedimentation tank I, and mud and water are separated; supernatant is introduced into a high-temperature Fenton reactionsystem, reaction effluent enters a coagulation reaction tank II, the reaction effluent flows into a sedimentation tank II for sedimentation, and the mud and the water are separated; the supernatant isintroduced into an ammonia distillation tower, and the wastewater after an ammonia recovery enters a biochemical regulating tank; the wastewater in the biochemical regulating tank is introduced intoa biochemical system, and the biochemical system adopts aerobic, hydrolytic acidification and aerobic biochemical combined processes to achieve an removal of COD, ammonia nitrogen and total nitrogen;after the biochemical effluent is deeply oxidized, the COD, the ammonia nitrogen and the total nitrogen are completely discharged up to the standard, and the biochemical effluent has good environmental effect.

Description

Technical field [0001] The invention belongs to the field of sewage treatment methods, in particular to a method for treating food wastewater containing high-concentration pyrazine. Background technique [0002] Pyrazine is colorless crystal; it is isomer with pyrimidine and pyridazine. Electrophilic substitution reaction is not easy to occur, but easy to react with nucleophiles. In nature, its pure product rarely exists, but its structure exists in folic acid, which forms the pterin part. Industrially, ethanolamine is produced by dehydrogenation under gas-phase catalysis. Its derivatives have many applications. For example, dibenzopyrazine is an important dye, and phenazine is known for its anti-tumor, antibacterial and diuretic properties. Tetramethylpyrazine has been reported to capture superoxide anions and reduce the production of nitrogen oxides in human granulocytes. Pyrazine substances are difficult to biodegrade, which is a difficulty in wastewater treatment. There i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/38
CPCC02F1/04C02F1/5236C02F1/56C02F1/66C02F1/722C02F1/76C02F3/302C02F9/00C02F2001/007C02F2101/38C02F2301/08C02F2305/026
Inventor 周顺高峰徐卫东周正胜
Owner JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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