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Kitchen waste treatment method capable of improving capacity of treatment system and hydrolysis tank

A food waste and treatment system technology, applied in the field of food waste treatment, can solve the problems of low organic load and low production capacity, and achieve the effect of increasing the hydrolysis ratio, improving the utilization rate, and accelerating the hydrolysis process

Active Publication Date: 2018-12-11
广州市朗坤环境科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the problems of low organic load and low production capacity in the existing anaerobic treatment method for kitchen waste, and provides a kitchen waste treatment method that can increase the organic load of the treatment system and increase production capacity, and is applicable to this kind of anaerobic treatment method. Method of food waste hydrolysis tank

Method used

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  • Kitchen waste treatment method capable of improving capacity of treatment system and hydrolysis tank

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Effect test

Embodiment 1

[0043] This embodiment provides a food waste treatment method that can increase the productivity of the processing system and a food waste hydrolysis tank suitable for the method.

[0044] The food waste hydrolysis tank 100 of this embodiment is such as figure 1 As shown, it includes a tank body and a mixer 112 for mixing materials in the tank body, and the outer wall of the tank body is provided with a hydrophobic rock wool insulation layer 103.

[0045] The bottom of the tank body is provided with an aeration tube 102, and the aeration tube 102 is provided with aeration holes with a diameter of 15mm. The aeration tubes 102 in the tank body are connected by flanges. The aeration tube 102 is connected to the aeration tube 102 outside the tank body. An air source device 101 for supplying air is connected, and the air source device 102 may be a low-pressure air compressor and / or an air tank.

[0046] The tank body is provided with a feed port 108 for feeding materials at a position fo...

Embodiment 2

[0068] This embodiment provides a food waste treatment method that can increase the production capacity of the processing system, including preprocessing the food waste to form a food waste slurry (the index for controlling the food waste slurry during the pretreatment is the same as that of the first embodiment) ), use a hydrolysis tank to hydrolyze the kitchen waste slurry, and use an anaerobic tank to perform anaerobic digestion of the hydrolyzed kitchen waste slurry (control parameters and examples of anaerobic tank and anaerobic digestion treatment) 1). The hydrolysis tank is the food waste hydrolysis tank described in Example 1, and the hydrolysis tank is preset with hydrolysis bacteria, which is consistent with that in Example 1.

[0069] Use the kitchen waste hydrolysis tank to hydrolyze the kitchen waste slurry, control the average concentration of dissolved oxygen of the kitchen waste slurry in the hydrolysis tank to 0.7-1.0mL / L; control other hydrolysis environment par...

Embodiment 3

[0072] This embodiment provides a food waste treatment method, which includes preprocessing the food waste to form a food waste slurry (the index for controlling the food waste slurry during the pretreatment is the same as that of the first embodiment), and the use of a hydrolysis tank The kitchen waste slurry is hydrolyzed, and the anaerobic tank is used to perform anaerobic digestion of the hydrolyzed kitchen waste slurry (the control parameters of the anaerobic tank and the anaerobic digestion treatment are the same as those in Example 1). The hydrolysis tank is the food waste hydrolysis tank described in Example 1, and hydrolysis bacteria are preset in the hydrolysis tank, which is consistent with that in Example 1.

[0073] Use the kitchen waste hydrolysis tank to hydrolyze the kitchen waste slurry, control the average concentration of dissolved oxygen in the kitchen waste slurry in the hydrolysis tank to 0.2-0.4mL / L; control other hydrolysis environment parameters in the hyd...

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Abstract

The invention relates to the technical field of kitchen waste treatment, in particular to a method for improving the capacity of a kitchen waste anaerobic treatment system and a hydrolysis tank. According to the kitchen waste treatment method capable of improving the capacity of the treatment system and the hydrolysis tank, kitchen waste slurry is fed from 1 / 2 or above height of the tank wall of the hydrolysis tank and is synchronously stirred, so that the kitchen waste slurry can be fully mixed with original kitchen waste slurry in the hydrolysis tank from top to bottom; the temperature of the kitchen waste slurry in the hydrolysis tank is kept at 35+ / -3 DEG C by monitoring and interfering the environment in the hydrolysis tank, the average concentration of dissolved oxygen is kept at 0.5-1.0 mL / L, the pH value is kept at 3-5, the hydrolysis conversion rate can be remarkably increased, and therefore the treatment load of the treatment system is improved, by means of the method, the treatment load of the treatment system can be improved to be 4.5-6.5 kgVS / m<3>*d, the treatment residence time can be saved by about 40%, and the occupied space of an anaerobic tank can be saved by 25%or above; and the method has great application significance in increasing the treatment amount of the kitchen waste under the condition that an original kitchen waste treatment plant is not expanded.

Description

Technical field [0001] The invention relates to the technical field of food waste treatment, in particular to a food waste treatment method and a hydrolysis tank that can increase the production capacity of a processing system. Background technique [0002] Most of the existing food waste anaerobic treatment systems adopt a two-phase anaerobic treatment method that separates the hydrolysis section and the anaerobic section. The food waste and other organic biomass waste are mixed in the hydrolysis tank. The molecular organic matter is hydrolyzed into small molecular organic matter, and then enters the anaerobic system to be decomposed and converted into biogas. Since the kitchen waste is hydrolyzed by traditional technology without intensive treatment, the hydrolysis conversion rate is low. Most of the kitchen waste slurry needs to continue to be hydrolyzed in the anaerobic tank, which in turn leads to the lower processing capacity of the anaerobic tank , Otherwise the acidifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 章开王未平
Owner 广州市朗坤环境科技有限公司
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