Kitchen residual garbage normal temperature anaerobic fermentation method

A technology of kitchen waste and anaerobic fermentation, which is applied in the direction of fermentation, etc., can solve the problems of reduced gas production effect, large initial investment, and long fermentation cycle, and achieves strong tolerance, low operating cost, and reduced energy consumption.

Inactive Publication Date: 2007-10-31
DONGGUAN KECHUANG FUTURE ENERGY SOURCE TECHDEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, there are also problems such as long fermentation cycle, large initial investment, unstable operation, easy to cause acidosis and decrease the gas production effect, so it has not been widely used at present.

Method used

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  • Kitchen residual garbage normal temperature anaerobic fermentation method

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Effect test

Embodiment 1

[0030] Composition of kitchen waste: rice noodle products: vegetables: meat = 6:3:1; room temperature conditions: 24-28°C during the day and 15-20°C at night. After mixing kitchen waste and water at a ratio of 1:2, use a sieve to filter out the larger substances. Adjust the remaining sludge to a concentration of about 10g / L in the sludge conditioning tank, and filter through a screen to remove larger substances. Mix the kitchen waste obtained above with the remaining sludge at a ratio of 2:1, and then enter the thermal pretreatment pool for heating after passing through the heat exchanger. The heating condition is 80°C for 30 minutes. The heat-treated mixture enters a heat exchanger where it exchanges heat with the non-heat-treated mixture. After heat exchange, the temperature of the mixture of kitchen waste and excess sludge entering the closed fermentation tank is about 35-40°C, and the kitchen waste undergoes anaerobic fermentation at room temperature under the stirring ac...

Embodiment 2

[0032]Composition of kitchen waste: rice noodle products: vegetables: meat = 6:3:1, room temperature conditions: 26-29°C during the day and 19-25°C at night. After mixing kitchen waste and water at a ratio of 1:3, use a sieve to filter out larger substances. Adjust the remaining sludge to a concentration of about 20g / L in the sludge conditioning tank, and filter through a screen to remove larger substances. The kitchen waste obtained above is mixed with the remaining sludge at a ratio of 4:1, and after passing through the heat exchanger, it enters the thermal pretreatment tank for heating. The heating condition is 121°C for 5 minutes. The heat-treated mixture enters a heat exchanger where it exchanges heat with the non-heat-treated mixture. After heat exchange, the temperature of the mixture of kitchen waste and excess sludge entering the closed fermentation tank is about 50-55°C, and the kitchen waste undergoes anaerobic fermentation at room temperature under the stirring ac...

Embodiment 3

[0034] Composition of kitchen waste: rice noodle products: vegetables: meat = 6:3:1, room temperature conditions: 24-28°C during the day and 15-20°C at night. After mixing kitchen waste and water at a ratio of 1:4, use a sieve to filter out the larger substances. Adjust the remaining sludge to a concentration of about 15g / L in the sludge conditioning tank, and filter through a screen to remove larger substances. Mix the kitchen waste obtained above with the remaining sludge at a ratio of 4:1, and then enter the thermal pretreatment tank for heating after passing through the heat exchanger. The heating condition is 150°C for 5 minutes. The heat-treated mixture enters a heat exchanger where it exchanges heat with the non-heat-treated mixture. After heat exchange, the temperature of the mixture of kitchen waste and excess sludge entering the closed fermentation tank is about 60-55°C, and the kitchen waste undergoes anaerobic fermentation at room temperature under the stirring ac...

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Abstract

The invention discloses a method to proceed normal temperature anaerobic fermentation with kitchen garbage, which comprises the following steps: mixing the kitchen garbage and water with a finite proportion; grinding to proper grain size with food breaker; sieving; sieving the surplus sludge; mixing with the grinding garbage with a finite proportion; proceeding heat treatment; getting mixture; using as joint ferment base material; placing in closed fermenter; proceeding anaerobic fermentation at room temperature; generating hydrogen; proceeding simple pretreatment; using as fuel or generating raw material. This invention possesses better economic benefit, social benefit and environmental benefit.

Description

technical field [0001] The invention relates to a method for processing and recycling kitchen waste and biological hydrogen production, in particular to a method for producing hydrogen by anaerobic fermentation of kitchen waste at room temperature. Background technique [0002] Kitchen waste is a general term for leftover meals discarded by catering units such as families, hotels, restaurants, government agencies, enterprises and institutions, and is a kind of organic solid waste generated in people's daily life. The composition of kitchen waste is very complex. It is a hodgepodge of oil, water, mixed vegetables, fruit peels, fruit stones, rice noodles, fish, meat, bones, waste tableware, paper towels, etc. Organic substances such as starch, dietary fiber, animal fat and protein are kitchen waste. The main organic components of waste. According to the analysis and determination of relevant units, the dry matter of undeteriorated kitchen waste contains 16.73% crude protein, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00
Inventor 肖本益林佶侃
Owner DONGGUAN KECHUANG FUTURE ENERGY SOURCE TECHDEV
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