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Enhanced Sludge Anaerobic Fermentation Unit

A technology of sludge anaerobic fermentation and anaerobic fermentation tank is applied in the field of environmental pollution control equipment to achieve the effects of long-term investment, convenient installation and maintenance, and easy layout.

Inactive Publication Date: 2019-03-19
张易凡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also a stirrer in the tank

Method used

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  • Enhanced Sludge Anaerobic Fermentation Unit
  • Enhanced Sludge Anaerobic Fermentation Unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A cylindrical anaerobic fermentation tank body 10 with an effective volume of 1.2L. Take 3 carbon rods 7 of Φ10mm×120mm, connect the carbon rods 7 with thin stainless steel wires, and directly insert them into the sludge 6 to be fermented in the tank body 10 . Cover the upper cover of the tank body 10, connect the gas collector, start the agitator 5, place it at a temperature of 35-40°C, and carry out anaerobic fermentation with a hydraulic retention time of 20-25 days, and the amount of methane produced will increase by 30-40 % or so (compared with no addition).

Embodiment 2

[0021] Take 8L of the mixture of anaerobic sludge and sludge to be treated and add it to the square anaerobic fermentation tank body 10 with an effective volume of 10L. There are 14 carbon rods 7 with a size of Φ20mm×120mm, forming a rectangle with 4 rods on each side , each with a spacing of 300mm. They are bound together by the connecting piece 9 stainless steel thin wires, and inserted into the sludge 6 to be fermented in the tank body 10 . After 20 days of fermentation, the amount of methane produced increased by about 30% compared with the reference device without adding carbon rods.

Embodiment 3

[0023] 14 carbon rods 7 are used to form two radial concentric circles, which are directly inserted into the tank body 10 of a cylindrical anaerobic sludge fermentation tank with a diameter of 2 m. Methane production increased by around 20%.

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Abstract

The invention relates to a reinforced sludge anaerobic fermentation device which comprises an anaerobic fermentation tank body of which the upper cover is provided with a gas collector, wherein a feed pipe and a discharge pipe are respectively arranged above both sides of the tank body; a stirrer is arranged in the tank body; the lower part of a sludge storage tank is connected with the feed pipe above one side of the tank body through a sludge pump; and the upper part of the sludge storage tank is connected with the discharge pipe above the other side of the tank body through a sludge return pipe. The reinforced sludge anaerobic fermentation device is characterized in that vertically annularly arranged carbon rods are arranged in the tank body. The carbon rods are connected with each other through connecting pieces and fastened to the inner wall of the tank body by a fixture. The quantity of the carbon rods is at least 3. The diameter range of the carbon rods is 10-200mm, and the length range is 100-5000mm. When the diameter of the tank body is greater than 5 meters, inner and outer rings of carbon rods are arranged. When the cross section of the tank body is rectangular, the carbon rods are arranged into a rectangle. The carbon rods are directly arranged in the sludge of the anaerobic fermentation tank body, and thus, are convenient for mounting and management. The reinforced sludge anaerobic fermentation device is beneficial to environmental protection and saves the investment. The carbon rods are cheap and accessible, and are effective for a long time after one-time input; and thus, the reinforced sludge anaerobic fermentation device can easily implement industrialized application.

Description

technical field [0001] The invention belongs to environmental pollution control equipment. technical background [0002] Anaerobic methanogenesis is an effective way to treat organic waste. In anaerobic digestion, organic solid waste is not only reduced, but also can generate energy—methane gas. At present, anaerobic digestion technology has been widely used in sewage treatment, municipal sludge digestion, garbage disposal, etc. However, in the anaerobic treatment of municipal sludge, the technology has the following problems: (1) the structure of the sludge is complex, and the rate of hydrolysis and acidification is slow, which is the rate-limiting process of anaerobic digestion of sludge; (2) the production of methane is harmful to the environment Sensitive, the accumulation of organic acids produced by anaerobic hydrolytic acidification is likely to inhibit methanogens, resulting in the suspension of methane production and even the failure of anaerobic fermentation. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04
Inventor 张易凡
Owner 张易凡