Kitchen waste, straw and municipal sludge resourceful treatment system and method

A technology for kitchen waste and municipal sludge, applied in the field of solid waste resource utilization, can solve the problems of long hydrolysis process, low gas production efficiency, slow biogas hydrolysis rate, etc.

Pending Publication Date: 2020-10-23
JIANGSU KAIMI MEMBRANE TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing food waste alone anaerobic digestion is easy to cause too fast acidification and low gas production efficiency; the hydrolysis rate of biogas produced by the fermentation of crop straw is slow and the hydrolysis process is long; the thermal drying of sludge requires a lot of energy and low biogas production technology Problem, the present invention provides a system and method for recycling food waste, straw and municipal sludge. The system and method can not only stabilize the pH value in the anaerobic fermentation process of food waste, accelerate the hydrolysis process of straw, and promote the Sludge decomposition, adjust the carbon-nitrogen ratio of the synergistic anaerobic digestion system, increase the methane production of the system, and meet the heat demand of biogas residue drying, and realize the energy self-balance of the system

Method used

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  • Kitchen waste, straw and municipal sludge resourceful treatment system and method
  • Kitchen waste, straw and municipal sludge resourceful treatment system and method
  • Kitchen waste, straw and municipal sludge resourceful treatment system and method

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Embodiment approach 1

[0064] Refer to figure 1 , This embodiment provides a resource treatment system for kitchen waste, straw and municipal sludge, including kitchen waste pretreatment device 10, straw pretreatment device 20, municipal sludge pretreatment device 30, and anaerobic digestion reaction device 40 And the biogas slurry treatment device 50.

[0065] The food waste pretreatment device 10 includes a food waste sorting device 11 and an oil-water separation device 12.

[0066] The food waste sorting equipment 11 is an existing technology and has a food waste inlet, a plastic debris outlet, and a food slurry outlet. Kitchen waste is food processing leftovers and edible residues produced by restaurants, canteens, colleges and other catering industries. The composition is very complex. In addition to containing oil, water, vegetables, rice noodles, and fish, it also includes waste tableware, plastic, paper towels, and bones. Wait for solid waste. The kitchen waste sorting equipment 11 can effectiv...

Embodiment approach 2

[0081] Refer to figure 2 This embodiment provides a resource treatment system for kitchen waste, straw and municipal sludge, which is an improvement made on the basis of Embodiment 1, except that it includes the same kitchen waste pretreatment device 10 as in Example 1. , In addition to the straw pretreatment device 20, the municipal sludge pretreatment device 30, the anaerobic digestion reaction device 40, and the biogas slurry treatment device 50, it also includes a biogas treatment device 60 and a waste heat recovery device 70.

[0082] The biogas treatment device 60 includes a biogas purification device 61, a hot water biogas boiler 62, a steam biogas boiler 63 and a generator set 64.

[0083] The biogas purification equipment 61 is an existing technology and has a biogas inlet and a clean biogas outlet. The biogas inlet is connected to the biogas outlet of the methane-producing reactor 42 and is used to purify the methane-producing reactor 42 to obtain biogas and remove sulfid...

Embodiment approach 3

[0093] See image 3 , This embodiment provides a resource treatment method for kitchen waste, straw and municipal sludge, which includes the following steps:

[0094] S01: Food waste sorting

[0095] In this step, the food waste sorting equipment 11 is used to sort the food waste, so as to obtain the food slurry and plastic sundries. Kitchen waste is food processing leftovers and practical residues produced by restaurants, canteens, colleges and other catering industries. The composition is very complex. In addition to containing oil, water, vegetables, rice noodles, and fish, it also contains waste tableware, plastic, paper towels, and bones. Wait for solid waste. The sorting of food waste can effectively separate this part of plastic debris.

[0096] S02: Oil-water separation

[0097] In this step, the oil-water separation device 12 is used to separate the kitchen slurry from oil and water, so as to obtain grease and organic matter. The oil-water separation process mainly heats t...

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Abstract

The invention discloses a kitchen waste, straw and municipal sludge resourceful treatment system and a method. The treatment system comprises a kitchen waste pretreatment device, a straw pretreatmentdevice, a municipal sludge pretreatment device, an anaerobic digestion reaction device and a biogas slurry treatment device. Through the system and the method, the synergistic digestion treatment of the kitchen waste, the straws and the municipal sludge can be realized; the treatment efficiency of the straws and the municipal sludge and the biogas yield are improved; the heat requirement of biogasresidue drying is met, the self-balance of system heat can be realized, the problem of low independent anaerobic digestion efficiency of straws and municipal sludge is solved, harmless and resourceful treatment of kitchen waste is realized, the environmental benefit and economic benefit are high, and the popularization value is very wide.

Description

Technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a resource treatment system and method for kitchen waste, straw and municipal sludge. Background technique [0002] Food waste mainly refers to food processing residues and edible residues produced in restaurants, canteens, schools and other catering industries. Its components are complex, mainly oil, water, vegetables, rice noodles, fish, meat, bones and paper towels, plastics, waste tableware, etc. In my country, the output of food waste is huge, and it is showing a trend of rapid growth. Food waste has both hazardous and resource-based characteristics. On the one hand, food waste is perishable to spoilage, odor, spreading bacteria and viruses, and pollute the environment; on the other hand, food waste contains a lot of organic matter and is easily biodegradable, which is a very valuable renewable Resources, clean energy biogas can be produced through anaer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/13C02F11/00B09B3/00C12M1/107C10L3/10
CPCC02F11/04C02F11/13C02F11/00B09B3/00C12M1/107C10L3/10C02F2305/06B09B2101/02Y02E50/30
Inventor 毛利伟关晓琳王怀林
Owner JIANGSU KAIMI MEMBRANE TECH
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