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Method for removing organic arsenic in livestock cultivation waste water by utilizing three-stage anaerobic treatment process

A technology for livestock and poultry breeding wastewater and anaerobic treatment, applied in anaerobic digestion treatment, animal husbandry wastewater treatment, waste fuel, etc., can solve problems such as difficulty in popularization, secondary pollution cost, organic arsenic efficiency and poor treatment stability, etc. Achieve good adsorption and immobilization, reduce harm, reduce inhibition effect

Active Publication Date: 2012-09-19
合肥庐阳科技创新集团有限公司
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

For the anaerobic treatment of organic arsenic wastewater, the treatment method is generally a single-stage anaerobic reactor, the most common is the upflow anaerobic sludge bed reactor (UASB), but due to the arsenic and heavy metals in the wastewater ions and the toxic effects on microorganisms, especially methanogens, make this type of anaerobic reactor have poor efficiency and stability in the treatment of organic arsenic, and the arsenic and heavy metal ions in it may cause secondary pollution due to difficulty in fixing them or because of The cost of fixing is high and difficult to promote

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the treatment of chicken farm breeding waste water

[0026] 1. Add anaerobic sludge into the hydrolysis acidification reactor, the volume of the added sludge is 30% of the reactor volume, feed the aquaculture wastewater containing organic arsenic, the concentration of organic arsenic is 20mg / L, control the reactor The hydraulic retention time is 36 hours, the pH of the solution in the reactor is controlled at 3-5, the temperature is controlled at 25-35° C., and the domesticated sludge is obtained by running for 1 month.

[0027] 2. Pass the arsenic-containing aquaculture wastewater discharged from the chicken farm into a hydrolysis acidification reactor filled with domesticated sludge. The volume of the domesticated sludge accounts for 30% of the reactor volume, and the hydraulic retention time is 24 Hours, the temperature was controlled at 35°C.

[0028] 3. The aquaculture wastewater treated by the hydrolytic acidification reactor is passed into the adso...

Embodiment 2

[0031] Embodiment 2: the treatment of pig farm breeding wastewater

[0032]1. Add anaerobic sludge into the hydrolysis acidification reactor, the volume of sludge added is 40% of the volume of the reactor, feed the aquaculture wastewater containing organic arsenic, wherein the concentration of organic arsenic is 40mg / L, control the reactor The hydraulic retention time is 36 hours, the pH of the solution in the reactor is controlled at 3-5, and the temperature is controlled at 25-35° C.; it is operated for 2 months to obtain domesticated sludge.

[0033] 2. Pass the arsenic-containing aquaculture wastewater discharged from the pig farm into a hydrolysis acidification reactor filled with domesticated sludge. The volume of the domesticated sludge accounts for 40% of the reactor volume, and the hydraulic retention time is 36 hours, the temperature is controlled at 35°C;

[0034] 3. The aquaculture wastewater treated by the hydrolytic acidification reactor is passed into the adsor...

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Abstract

The invention discloses a method for removing organic arsenic in livestock cultivation waste water by utilizing three-stage anaerobic treatment process. The method comprises the steps of adding pulverized fuel ash and slaked lime mixture between an acid producing phase and a methane producing phase in a two-phase anaerobic treatment as an adsorbed phase of an adsorbing medium, and forming the three-stage anaerobic treatment process for removing the organic arsenic in the livestock cultivation waste water. The treatment process has good removal effect on the organic arsenic, and has arsenic content in treated water to be lower than 20mug / L, which is lower than the emission standard of waste water in China, thus realizing treatment of wastes with processes of wastes against one another, reducing harm of arsenic to the environment and human health by utilizing the pulverized fuel ash and the slaked lime to adsorb and fix the organic arsenic, and fully utilizing solid wastes as the treated pulverized fuel ash and the slaked lime can be used as building materials. Simultaneously, the activity of methane producing bacteria can be improved, and the running stability of a reactor can be enhanced.

Description

1. Technical field [0001] The invention relates to a three-stage anaerobic treatment process for removing organic arsenic in livestock and poultry breeding wastewater, that is, a three-stage anaerobic treatment process of hydrolysis acidification-adsorption-methanization, the process has a good removal effect on organic arsenic, The content of total arsenic in the treated water is lower than 20 μg / L, and the harm of arsenic to the environment and human health is reduced due to the use of fly ash and slaked lime to fix organic arsenic in wastewater. The invention belongs to the technical field of organic arsenic wastewater treatment. 2. Background technology [0002] In recent years, organic arsenic preparations have also been widely used as feed additives in livestock and poultry breeding. The currently approved arsenic preparations mainly include roxarsarsenic and arsanic acid, among which roxarsarsenic is more economical and widely used in growth promotion and antibacteri...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F103/20
CPCY02E50/30
Inventor 胡真虎陈甲
Owner 合肥庐阳科技创新集团有限公司
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