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Harmless treatment method of waste biomass

A technology for waste biomass, harmless treatment, applied in chemical instruments and methods, oxidized water/sewage treatment, treatment of hydrocarbon oil, etc. Effect

Inactive Publication Date: 2016-07-06
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the thermal hydrolysis process, the main by-product water phase contains a large amount of N-containing nutrients, and the COD content is 8000-150000mg / L, which cannot be discharged directly and needs further treatment

Method used

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  • Harmless treatment method of waste biomass

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Experimental program
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Effect test

Embodiment 1

[0025] (1) 10g of Enteromorpha (Qingdao algae bloom) is adjusted to 80% of its water content with water, then added to the reactor, and the reactor is sealed; the initial pressure of the reactor is 0MPa, and the stirring speed is 100rpm, and the reactor is heated To 260°C, keep for 30min for hydrolysis reaction;

[0026] (2) After the hydrolysis reaction, stop heating, wait for the reactor to cool down to room temperature, first collect the gas in the reactor, then open the reactor, collect the remaining mixture in the reactor with a glass cup, and filter to obtain biological crude oil and water phase; wherein, the yield of bio-crude oil is 17.7%;

[0027] (3) Anaerobic fermentation technology is used to further treat the water phase. The anaerobic fermentation technology uses an upflow sludge reactor at 37°C. After 12 days of fermentation, CH 4 and H 2 The output can reach 231mL / gCOD, and the degradation rate of COD can reach 80.0%;

[0028] (4) The water from the anaerobi...

Embodiment 2

[0030] (1) After adjusting the water content of 10g of kitchen waste to 70% with water, add it to the reactor, and seal the reactor; the initial pressure of the reactor is 2MPa, the rotational speed of the agitator is 400rpm, and the temperature of the reactor is raised to 320°C. Keep for 30min for hydrolysis reaction;

[0031] (2) After the hydrolysis reaction, stop heating, wait for the reactor to cool down to room temperature, first collect the gas in the reactor, then open the reactor, collect the remaining mixture in the reactor with a glass cup, and filter to obtain biological crude oil and water phase; wherein, the yield of bio-crude oil is 32.9%;

[0032] (3) Anaerobic fermentation technology is used to further treat the water phase. The anaerobic fermentation technology uses a packed bed reactor for two-stage fermentation at 50°C. After 14 days of fermentation, the methane production rate is 275mL / gCOD, and the COD removal rate 91.1%;

[0033] (4) The effluent from ...

Embodiment 3

[0035] (1) After adjusting the water content of 10g of straw to 90% with water, add it to the reactor, and seal the reactor; the initial pressure of the reactor is 6MPa, the speed of the agitator is 600rpm, and the temperature of the reactor is raised to 360°C and kept for 70min carry out the hydrolysis reaction;

[0036] (2) After the hydrolysis reaction, stop heating, wait for the reactor to cool down to room temperature, first collect the gas in the reactor, then open the reactor, collect the remaining mixture in the reactor with a glass cup, and filter to obtain biological crude oil and water phase; wherein, the yield of bio-crude oil is 23.5%;

[0037] (3) The water phase is further treated by supercritical water gasification technology. After the water phase is gasified in supercritical water at 400°C for 30 minutes, the hydrogen content in the generated gas is 26.3%, the methane content is 25.8%, and the COD degradation rate is 82%;

[0038] (4) The supercritical gasi...

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Abstract

The invention discloses a harmless treatment method of waste biomass in the technical field of biological crude oil and fuel gas preparation. The method comprises the following steps: adjusting water content in the waste biomass and adding into a reaction kettle and stirring; heating for a thermal hydrolysis reaction; after the reaction, collecting the gas and then residual mixer in the reaction kettle; filtering to obtain biological crude oil and a water phase; further treating the water phase by the anaerobic fermentation technology or supercritical water gasification technology to obtain a fuel gas; and meanwhile, adjusting the water content of the waste biomass by using the anaerobic fermentation effluent or supercritical water gasification effluent for recycling. According to the treatment method of waste biomass, by coupling the thermal hydrolysis technology, the anaerobic fermentation technology and supercritical water gasification technology, no waste is discharged in the whole process, full utilization of carbon resources is realized, the energy crisis can be relieved, the atmospheric pollution is reduced, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of biological crude oil and gas preparation, and in particular relates to a harmless treatment method for waste biomass. Background technique [0002] Thermal hydrolysis is a kind of biomass thermochemical conversion technology. Under certain temperature and pressure, the special effect of different solvents is used to convert biomass into liquid fuel or chemicals. The conversion rate of biomass is relatively high, and the requirements for equipment are relatively high. lower. Thermal hydrolysis can convert solid biomass into liquid bio-oil. After upgrading and refining, these bio-oils can replace part of the fuel and be used as fuel additives. Compared with traditional pyrolysis, the reaction conditions of biomass liquefaction are relatively mild, and it can be produced on an industrial scale, which is one of the ways to efficiently utilize biomass resources. However, during the thermal hydrolysis process...

Claims

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Application Information

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IPC IPC(8): C10G1/00C12P5/02C10L3/00C02F1/72C02F101/30
CPCC02F1/72C02F2101/30C10G1/00C10G2300/1011C10L3/00C12P5/023Y02E50/30Y02P20/54
Inventor 刘志丹卢建文朱张兵司哺春张源辉
Owner CHINA AGRI UNIV
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