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Wastewater treatment process of anaerobic ammonia oxidation and sulfur-based autotrophic denitrification coupled denitrification and desulphuration

A technology of anammox and anammox bacteria, which is applied in the field of wastewater treatment process of anammox-sulfur autotrophic denitrification coupling denitrification and desulfurization, can solve the problems of increased treatment cost and complicated treatment process, Achieve the effects of reducing the amount of excess sludge, low operating costs, and simplifying complexity

Active Publication Date: 2015-08-19
浙江国泉生态环境有限公司
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Problems solved by technology

[0005] The current sewage treatment process usually separates denitrification and sulfur removal, which not only complicates the treatment process, but also increases the treatment cost

Method used

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  • Wastewater treatment process of anaerobic ammonia oxidation and sulfur-based autotrophic denitrification coupled denitrification and desulphuration

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Embodiment 1

[0023] (1) Obtaining the mixed culture of anammox-denitrophilic bacteria

[0024] The up-flow anaerobic sludge bed reactor (2.5L) was used as the main reactor, and the process was tested with simulated wastewater. Add anaerobic ammonia oxidation granular sludge to the granular sludge rich in Thiobacillus denitrificans (sulfide removal rate is greater than 90%) at a volume ratio of 1:1 and mix evenly to control the sulfide in the simulated wastewater in terms of S The concentration is 30mg L -1 , the concentration of ammonia as N is 40 mg L -1 , the concentration of nitrite in terms of N is 50 mg L -1 , under the condition of anaerobic, 30-35℃, pH 7.5-8.0, enrich the mixed culture of anammox bacteria - Thiobacillus denitrifica by increasing the influent flow rate, the initial hydraulic retention time is 10h, when the influent When the total nitrogen removal rate is greater than 80%, and the total sulfur removal rate is greater than 80% and can be maintained for 3 days, the h...

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Abstract

The invention provides a wastewater treatment process of anaerobic ammonia oxidation and sulfur-based autotrophic denitrification coupled denitrification and desulphuration. The process is characterized in that a mixed culture of anaerobic ammonium oxidation bacteria and thiobacillus denitrificans is taken as a main part; in the same reactor, the temperature is controlled between 25-35 DEG C, the pH value of wastewater is adjusted to 7.5-8.0, and the hydraulic retention time is 2.5-10 hours; the concentration of ammonia in the wastewater calculated according to the element N is 40-300mg / L<-1>, the concentration of nitrite in the wastewater calculated according to the element N is 50-390mg / L<-1> and the concentration of sulfide in the wastewater calculated according to the element S is 30-170mg / L<-1>; the concentration ratio of the ammonia to the nitrite calculated according to the element N is 1:1-1.32, and the concentration ratio of the nitrite calculated according to the element S to the ammonia calculated according to the element N is 1:1.54-1.74. The process is a novel wastewater treatment technology for synchronically performing denitrification and desulphuration economically efficiently by using treatment of wastes with processes of wastes against one another.

Description

(1) Technical field [0001] The invention relates to a process for denitrification and desulfurization of waste water, in particular to a waste water treatment process for coupling anaerobic ammonium oxidation-sulfur autotrophic denitrification with denitrification and desulfurization. (2) Background technology [0002] The accumulation of nitrogen and other nutrient elements in water bodies leads to frequent outbreaks of eutrophication in water bodies, endangering aquatic organisms and destroying ecological balance. At the same time, the anaerobic treatment of sulfate-rich wastewater such as oil, pharmaceuticals, tanning, and landfill leachate produces a large number of toxic by-products, mainly sulfides, which are corrosive, biologically toxic, and easy to escape. H of foul odor 2 S gas is harmful to human health and environmental quality. The above-mentioned secondary pollutants need to be treated in depth before the wastewater is discharged. [0003] The traditional de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34
Inventor 金仁村郭琼李鹏杨晨晨陈辉户海燕张正哲
Owner 浙江国泉生态环境有限公司
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