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A biological denitrification method for natural rubber processing wastewater

A technology for processing wastewater and biological denitrification, which can be used in water pollutants, chemical instruments and methods, biological water/sewage treatment, etc. , the effect of reducing oxygen consumption

Active Publication Date: 2021-05-25
HAINAN UNIV
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Problems solved by technology

[0004] The object of the present invention is to propose a method for biological denitrification of natural rubber processing wastewater in view of the inhibition of hydrogen sulfide on methanogens and the high energy consumption of denitrification in the process of natural rubber processing wastewater treatment

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  • A biological denitrification method for natural rubber processing wastewater

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and embodiment the present invention will be further described: as figure 1 As shown, the denitrification device for treating natural rubber processing wastewater is equipped with raw water tank 1, 1# UASB reactor 2, 2# UASB reactor 3, 3# UASB reactor 4, low-oxygen biofilm reactor 5; raw water tank 1 An overflow pipe 1.1 and an emptying pipe 1.2 are provided; the raw water tank 1 is connected to the water inlet valve 2.2 of the 1# UASB reactor through the 1# UASB reactor inlet pump 2.1; the 1# UASB reactor 2 is cylindrical, with three Phase separator 2.5, with top discharge H 2 S and CH 4 ; 1# UASB reactor outlet pipe 2.4 is connected to 2# UASB reactor 3 through 2# UASB reactor inlet valve 3.2; 2# UASB reactor 3 is columnar, with a three-phase separator 2.5 at the top, and CH is discharged from the top 4 ; The outlet pipe 3.3 of the 2# UASB reactor is connected to the 3# UASB reactor 4 through the water inlet valve 4.2 o...

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Abstract

The invention discloses a method for biological denitrification of natural rubber processing wastewater. The natural rubber processing wastewater is adjusted to neutral pH and then enters 1# UASB reactor for anaerobic methane production, and the generated hydrogen sulfide is discharged from the water by means of methane stripping. Reduce hydrogen sulfide to inhibit methanogens; wastewater then enters 2# UASB reactor to continue anaerobic methane production; then wastewater enters 3# UASB together with the backflow nitrification liquid from the low-oxygen biofilm reactor to reduce nitrate nitrogen to sub Nitrate nitrogen, and at the same time, nitrite and part of the ammonia nitrogen in the sewage undergo anaerobic ammonium oxidation to produce nitrogen and nitrate nitrogen; the wastewater enters the low-oxygen biofilm reactor, and the remaining ammonia nitrogen in the water is oxidized to nitrite under low-oxygen aeration conditions At the same time, nitrite nitrogen and ammonia nitrogen undergo anaerobic ammonium oxidation to produce nitrogen and nitrate nitrogen, and finally realize the efficient denitrification of natural rubber processing wastewater.

Description

technical field [0001] The invention relates to a method for biological denitrification of natural rubber processing wastewater, which belongs to the technical field of sewage biological treatment. Background technique [0002] Natural rubber processing wastewater is mainly the wastewater discharged from the production of natural raw rubber and concentrated latex with natural latex as raw material. Among them, the main pollutants are organic matter, ammonia nitrogen and phosphorus, which mainly come from the coagulation of rubber whey, the pressing of rubber blocks, creasing, and washing. The wastewater is a kind of high-concentration organic acid wastewater with strong biodegradability, in which COD Cr , TN, and TP concentrations can reach above 20000, 2000, and 250 mg / L respectively. Natural rubber processing wastewater treatment is mainly to remove pollutants such as organic matter and nitrogen and phosphorus, so as to control black and odorous water bodies and eutrophi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/66C02F3/02C02F3/2846C02F3/302C02F9/00C02F2101/30
Inventor 马斌委燕许鑫鑫葛成军徐文
Owner HAINAN UNIV
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