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Method for producing bio crude oil and methane jointly from waste biomass

A technology for waste biomass and bio-crude oil, which is applied in the preparation of waste fuel, liquid hydrocarbon mixture, petroleum industry, etc., to achieve the effect of accelerating electron transfer, protecting the environment and enhancing stability

Inactive Publication Date: 2019-12-10
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the production process of hydrothermal liquefaction technology, a large amount of water phase and biochar will be produced. The water phase contains a large amount of carbon and nitrogen nutrients and some toxic and harmful substances. The COD content is 8000-150000mg / L

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  • Method for producing bio crude oil and methane jointly from waste biomass

Examples

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Comparison scheme
Effect test

Embodiment 1

[0040] Mix 10g of straw and 40g of water (the moisture content of the substrate is 81%), put it in a reaction kettle, carry out hydrothermal liquefaction (220°C, 30min), cool naturally to room temperature, and filter to obtain aqueous phase products and non-aqueous phase products ;

[0041] After the non-aqueous phase product is extracted with acetone, it is filtered and distilled in sequence to obtain bio-crude oil and bio-char;

[0042] Mix 500g of water phase and 500g of straw charcoal, and carry out anaerobic fermentation (hydraulic retention time is 3d, temperature is 30°C, and the number of effluent cycles is 5 times) to obtain methane. Compared with the control group without adding any biochar, the gas production peak of straw charcoal-enhanced anaerobic fermentation was 7 days earlier, and the removal rate of COD in water phase was 75.6%.

Embodiment 2

[0044] Mix 10g of sawdust and 20g of water (moisture content of the substrate is 70%), put it in a reaction kettle, carry out hydrothermal liquefaction (320°C, 300min), naturally cool to room temperature, and filter to obtain aqueous phase products and non-aqueous phase products ;

[0045] After the non-aqueous phase product is extracted with acetone, it is filtered and distilled in sequence to obtain bio-crude oil and bio-char;

[0046] Mix 500g of water phase with 250g of peanut shell charcoal, and carry out anaerobic fermentation (hydraulic retention time is 4d, temperature is 40°C, and the number of effluent cycles is 4 times) to obtain methane. Compared with the control group without adding any biochar, the gas production peak of the enhanced anaerobic fermentation with peanut shell charcoal was 5 days earlier, and the removal rate of COD in the water phase was 72.8%.

Embodiment 3

[0048] Mix 10g of pig manure and 30g of water (the moisture content of the substrate is 95%), put it into a reaction kettle, carry out hydrothermal liquefaction (400°C, 90min), cool naturally to room temperature, and filter to obtain the aqueous phase product and the non-aqueous phase product;

[0049] After the non-aqueous phase product is extracted with acetone, extraction and distillation are performed in sequence to obtain bio-crude oil and bio-coke;

[0050] Mix 500g of water phase with 167g of coconut shell charcoal, and carry out anaerobic fermentation (hydraulic retention time is 3d, temperature is 55°C, and the number of effluent cycles is 10 times) to obtain methane. Compared with the control group without adding any biochar, the gas production peak of enhanced anaerobic fermentation with peanut shell charcoal was 6 days earlier, and the removal rate of COD in water phase was 83.7%.

[0051] As can be seen from the above examples, the method provided by the present ...

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Abstract

The invention relates to the technical field of harmless treatment of waste biomass, in particular to a method for producing bio crude oil and methane jointly from waste biomass. Pathogenic bacteria in the waste biomass are killed through a hydrothermal liquefaction reaction in the method provided by the present invention, while high value of the biomass and harmless treatment are achieved; and atthe same time, the obtained biochar has more microporous structure in the hydrothermal liquefaction process. Through the enhanced anaerobic fermentation treatment of the aqueous phase through the above biochar, the acid inhibition and ammonia inhibition during the anaerobic fermentation process can be alleviated, the electron transfer during the fermentation process can be accelerated, the start-up period can be shortened, the stability of the system can be enhanced, the methanation process of anaerobic fermentation can be promoted, and the methane production efficiency can be improved to a large extent. Furthermore, the content of COD in the aqueous phase is effectively reduced, so that no waste is discharged in the whole process, full utilization of carbon resources is basically achieved, the energy crisis is relieved, air pollution is reduced, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of waste biomass, in particular to a method for co-producing biological crude oil and methane with waste biomass. Background technique [0002] Hydrothermal liquefaction is the conversion of biomass into liquid fuels or chemicals by using the special effects of water at a certain temperature and pressure. The biomass conversion rate is high, and the requirements for equipment are relatively low. Biomass hydrothermal liquefaction can convert solid biomass into liquid bio-oil. After upgrading and refining, these bio-oils can replace part of fuel and be used as fuel additives. [0003] However, in the production process of hydrothermal liquefaction technology, a large amount of water phase and biochar will be produced. The water phase contains a large amount of carbon and nitrogen nutrients and some toxic and harmful substances. The COD content is 8000-150000mg / L. Therefore, the aqueous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C10G1/00
CPCC10G1/002C10G2300/1003C10G2300/1011C12P5/023Y02E50/30
Inventor 赵立欣申瑞霞冯晶荆勇
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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