Method for efficiently and synergically processing food waste and household kitchen waste based on single-phase wet anaerobic digestion

A technology for anaerobic digestion and catering waste, applied in the direction of microorganism-based methods, biochemical equipment and methods, biological sludge treatment, etc., can solve the problem of anaerobic reactor operation collapse, complex components of catering waste, and complicated process operations To achieve the effect of ensuring efficient and stable operation, improving degradation rate, and improving gas production performance

Inactive Publication Date: 2020-12-22
CHONGQING ENVIRONMENT & SANITATION GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, food waste has complex components and high oil content. During the anaerobic digestion process, it is easy to produce a large amount of volatile fatty acids in the early stage of degradation, which breaks the balance between acid-producing bacteria and methanogenic bacteria, inhibits methane production, and promotes anaerobic reactions. crash
[0004] For food waste that is easy to hydrolyze and acidify, a two-phase anaerobic digestion process can be used to make the system run more stably, but the process is complicated and the scope of use is narrow

Method used

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  • Method for efficiently and synergically processing food waste and household kitchen waste based on single-phase wet anaerobic digestion
  • Method for efficiently and synergically processing food waste and household kitchen waste based on single-phase wet anaerobic digestion
  • Method for efficiently and synergically processing food waste and household kitchen waste based on single-phase wet anaerobic digestion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Choose food waste in Chongqing area (organic degradable matter 92.3±5%, bone 2.8±1.5%, plastic 3.1±2%, pH6.7~7.0, solid content 22±2%, volatile solid 18±2% %) and household kitchen waste (kitchen waste 41.9±4%, paper product 25.8±2%, fruit peel 20.5±2%, plastic 11±1%, garden waste 8.7±1%, fiber fabric 6.2±1%, PH7 .1~8.0, solid content 18±2%, volatile solid 12±2%) as raw materials, pretreatment of food waste and household kitchen waste by removing impurities and pulping, removing large-sized glass and stones from raw materials Plastic bags, etc., made into a slurry with a particle size of less than 8mm.

[0027] (2) The design volume is 56m 3 , the actual effective volume is 50m 3 , the single-phase wet CSTR anaerobic digestion tank with a diameter-to-height ratio of 0.9 is used as the reactor, and the slurry of food waste and household kitchen waste is added to the anaerobic digestion reactor. The amount is 50kg / d.

[0028] Add 0.4L / day of trace element nutrient...

Embodiment 2

[0038] (1) Choose food waste in Chongqing area (organic degradable matter 92.3±5%, bone 2.8±1.5%, plastic 3.1±2%, pH6.7~7.0, solid content 22±2%, volatile solid 18±2% %) and household kitchen waste (kitchen waste 41.9±4%, paper product 25.8±2%, fruit peel 20.5±2%, plastic 11±1%, garden waste 8.7±1%, fiber fabric 6.2±1%, PH7 .1~8.0, solid content 18±2%, volatile solid 12±2%) as raw materials, pretreatment of food waste and household kitchen waste by removing impurities and pulping, removing large-sized glass and stones from raw materials Plastic bags, etc., made into a slurry with a particle size of less than 8mm.

[0039] (2) The design volume is 56m 3 , the actual effective volume is 50m 3 , the single-phase wet CSTR anaerobic digestion tank with a diameter-to-height ratio of 0.9 is used as the reactor, and the slurry of food waste and household kitchen waste is added to the anaerobic digestion reactor. The amount is 50kg / d. Add 0.5L / day of trace element nutrient solution...

Embodiment 3

[0048] (1) Choose food waste in Chongqing area (organic degradable matter 92.3±5%, bone 2.8±1.5%, plastic 3.1±2%, pH6.7~7.0, solid content 22±2%, volatile solid 18±2% %) and household kitchen waste (kitchen waste 41.9±4%, paper product 25.8±2%, fruit peel 20.5±2%, plastic 11±1%, garden waste 8.7±1%, fiber fabric 6.2±1%, PH7 .1~8.0, solid content 18±2%, volatile solid 12±2%) as raw materials, pretreatment of food waste and household kitchen waste by removing impurities and pulping, removing large-sized glass and stones from raw materials Plastic bags, etc., made into a slurry with a particle size of less than 8mm.

[0049] (2) The design volume is 56m 3 , the actual effective volume is 50m 3 , the single-phase wet CSTR anaerobic digestion tank with a diameter-to-height ratio of 0.9 is used as the reactor, and the slurry of food waste and household kitchen waste is added to the anaerobic digestion reactor. The amount is 50kg / d. Add 0.6L / day of trace element nutrient solution...

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Abstract

The present invention discloses a method for efficiently and synergically processing food waste and household kitchen waste based on single-phase wet anaerobic digestion. The method comprises the following steps: performing an impurity removal and pulping pretreatment on food waste and household kitchen waste. Compared with single anaerobic digestion of food waste, through a combined anaerobic digestion treatment of mixed slurry of the food waste and household kitchen waste in a single-phase wet-type CSTR anaerobic digestion reactor, material mixing can improve a nutrient substance ratio of adigestion system, enhance activity of methanogens and accelerate an anaerobic digestion rate, so that the combined anaerobic digestion system has enough buffer performance, and an impact of fluctuation of feeding data on system operation in an engineering feeding process is resisted. By adding a trace element nutrient solution, a degradation rate and a treatment capacity of the system are effectively improved, a gas-production performance is effectively improved and high-load, efficient and stable digestion operation of the kitchen organic solid waste can also be guaranteed.

Description

technical field [0001] The invention belongs to the field of organic solid waste treatment and disposal, and relates to a method for harmless and resourceful disposal of catering waste and household kitchen waste, in particular to a method for efficient and coordinated treatment of catering waste and household kitchen waste based on single-phase wet anaerobic digestion Methods. Background technique [0002] The rapid development of the national economy and the continuous improvement of residents' living standards have promoted the urbanization of various cities into a stage of rapid development, but at the same time it has also caused the city to face the situation of "garbage siege". The amount of kitchen waste produced in my country every year is 70 million tons. Above, a large amount of kitchen waste seriously affects the urban environment, which not only hinders the development of urbanization, but also endangers human health. [0003] Catering waste and household kitche...

Claims

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Application Information

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IPC IPC(8): C12P5/02C12N1/20C02F11/04B09B3/00C12R1/01
CPCB09B3/00C02F11/04C12N1/20C12P5/023Y02E50/30
Inventor 罗博杨菊平唐军龙山何婧娴胡超超
Owner CHONGQING ENVIRONMENT & SANITATION GRP CO LTD
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