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Method for realizing zero discharge of anaerobic sludge digestion wastewater

A technology of anaerobic digestion and anaerobic digestion tank is applied in the field of zero discharge of anaerobic digestion sewage to achieve the effect of strong operability, wide source and reduction of sewage treatment cost.

Inactive Publication Date: 2013-06-26
杨顺生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the sewage containing high ammonia nitrogen must be treated to meet the standard, otherwise it cannot be discharged outside, and a large amount of cost is required to treat it to meet the standard

Method used

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  • Method for realizing zero discharge of anaerobic sludge digestion wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take by weighing 100kg of sludge, accurately measure the water content of sludge to 80%, and calculate the weight of dry matter, analyze the ratio of carbohydrates, proteins and oily substances, carbohydrates: protein: oily substances=45: 40:15, then dilute the sludge to a water content of 95%, then heat up to 40°C, and then enter the material preparation tank in the anaerobic digestion system at the front end of the anaerobic digestion tank, and then put 0.5-6kg of waste oil (such as sewer Oil) is heated to 42°C and put into the preparation tank, and then it is subjected to anaerobic digestion reaction. Under this mix ratio, the waste water discharge of the system is 0, which can basically realize zero discharge of sludge anaerobic digestion waste water.

Embodiment 2

[0026] Take by weighing 100kg of sludge, accurately measure the moisture content of sludge to 80%, calculate the weight of dry matter with this, analyze and learn that the ratio of its carbohydrates, proteins and oily substances is 30:60:10, and then The sludge is diluted to a water content of 95%, and then heated to 35°C before entering the anaerobic digestion tank, and then 0.2-2kg of waste oil (such as waste oil or waste oil from a food processing factory) is heated to 45°C and put into The anaerobic digestion preparation tank is then subjected to anaerobic digestion reaction, which can basically realize zero discharge of anaerobic digestion wastewater.

Embodiment 3

[0028] Take sludge from a certain factory, accurately measure the water content of the sludge, and analyze that the ratio of carbohydrates, proteins and oils and fats is 27:65:8, and combine 50kg of this sludge with a water content of 80% and 50kg of water content For about 90% of the garbage generated in the fresh vegetable market, the temperature is raised to 35°C, and then enters the anaerobic digestion tank, and then 0.2-4 kg of waste oil (such as waste oil) is heated to 45°C and put into the anaerobic digestion tank, and then Make it undergo anaerobic digestion reaction, and basically realize zero discharge of anaerobic digestion wastewater.

[0029] Although the present invention has been described in detail through the above-mentioned specific embodiments, those skilled in the art should understand that any changes in form and details made on this basis that do not exceed the scope of protection of the claims belong to The scope to be protected by the present invention....

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Abstract

The invention relates to the field of wastewater treatment, and in particular relates to a method for realizing the zero discharge of anaerobic sludge digestion wastewater through adding oil to control material constitution ratio. The method comprises the steps of: regulating the sludge to a proper concentration at first, pumping the sludge into an anaerobic digestion tank, adding oil into the sludge, mixing the sludge and the oil on the front end of the anaerobic digestion tank or in the anaerobic digestion tank through controlling material compositions fed into the tank, carrying out anaerobic digestion, keeping the water generated by anaerobic digestion self balanced, generating no residual water, achieving closed water circulation without continuous water replenishing, and thus realizing the zero emission of the wastewater. By utilizing the method, the zero emission of the wastewater can be realized, the local environmental load is not increased, and the wastewater treatment cost can be lowered; and the method is simple and easy to operate, and has wide raw oil sources and strong operability.

Description

technical field [0001] The invention relates to the field of sewage treatment, including a method for treating sludge, aquaculture waste liquid and planting waste, and specifically a method for controlling the composition ratio of materials by adding oil to realize zero discharge of anaerobic digested sewage. [0002] Background technique [0003] At present, in the centralized treatment and disposal of sludge, breeding waste liquid (feces) and planting waste in the market, a common method is anaerobic digestion. There are two forms of anaerobic digestion: one is to dehydrate the sludge from different sewage plants into solid or semi-solid, so that the water content is reduced to 50%~90%, and then transported to the centralized sludge disposal center , after dilution and heating, it enters the sludge digestion tank for anaerobic digestion; the second is to build the anaerobic digestion system in the sewage plant, and accept the undewatered sludge of the factory and the dew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04
Inventor 杨顺生
Owner 杨顺生