Energy utilization method of carbon dioxide zero-emission type organic waste

A technology of organic waste and carbon dioxide, applied in the direction of fertilizers made from biological waste, organic fertilizers, waste fuels, etc., to achieve the effect of eliminating environmental pollution

Active Publication Date: 2010-12-15
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

A zero-emission carbon dioxide-emission organic waste energy utilization method that integrates multiple technologies such as anaerobic fermentation hydrogen production, biogas fermentation, carbon dioxide absorption, microalgae fixation of carbon dioxide, biogas slurry treatment, and energy grass planting, and this method can simultaneously obtain Hydrogen and electricity are two clean energy sources, such methods have not been reported yet

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  • Energy utilization method of carbon dioxide zero-emission type organic waste
  • Energy utilization method of carbon dioxide zero-emission type organic waste

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Embodiment 1

[0031] like figure 1 As shown, the organic waste in this embodiment is livestock and poultry manure (pig manure) and crop straw (rice straw), the pretreatment device is a straw crusher, the microalgae is heat-resistant chlorella (Chlorella sorokiniana), and the energy grass For hybrid pennisetum. The steps are as follows:

[0032] (1) Raw material collection and pretreatment: collect pig manure and rice straw respectively and store them in the raw material storage pool 1, and use the straw crusher 2 to crush the straw to a particle size ≤ 20mm;

[0033] (2) Anaerobic fermentation hydrogen production and hydrogen purification: collect anaerobic activated sludge from the biogas digester, heat it at 80°C for 60 minutes as the hydrogen production inoculum, and transfer the crushed straw and pig manure to the hydrogen production adjustment tank 3, according to Add hydrogen-producing inoculum to 20% of the total mass of straw and pig manure, and add water to adjust the total solid...

Embodiment 2

[0040] The steps of this embodiment are the same as those in Example 1, except that the organic waste is sludge (sewage treatment plant sludge) and domestic organic waste (fruit and vegetable waste), the microalgae is Chlorella kessleri, and the energy grass is elephant grass. and:

[0041] In step (2), the anaerobic activated sludge was heated at 100°C for 30 minutes as the hydrogen-producing inoculum, the total solids concentration (TS) of the mixed material was adjusted to 15%, the fermentation temperature of the hydrogen-producing fermentation was controlled to be 38°C, and the hydrogen-producing fermentation The time is 3 days; in step (3), the fermentation temperature is controlled to be 38°C, and the biogas fermentation time is 20 days; CO in air 2 The concentration is 20%, and the microalgae culture time is 3 weeks; in step (5), after 4 months of growth period, harvesting is carried out.

[0042] Applying the method of carbon dioxide zero-emission organic waste energ...

Embodiment 3

[0044] The steps of this embodiment are the same as those in Example 1, except that the organic waste is sludge (papermaking sludge) and domestic organic waste (kitchen waste), the microalgae is Chlorococcum littorale, and the energy grass is royal grass. and:

[0045] In step (2), the anaerobic activated sludge was heated at 115°C for 15 minutes as the hydrogen-producing inoculum, the total solids concentration (TS) of the mixed material was adjusted to 8%, the fermentation temperature of the hydrogen-producing fermentation was controlled to be 30°C, and the hydrogen-producing fermentation The time is 2 days; in step (3), the fermentation temperature is controlled to be 30°C, and the biogas fermentation time is 10 days; CO in air 2 The concentration is 40%, and the culture time of the microalgae is 2 weeks; in step (5), the harvest is carried out after 2 months of growth period.

[0046] Applying the method of carbon dioxide zero-emission organic waste energy utilization in...

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Abstract

The invention provides an energy utilization method of carbon dioxide zero-emission type organic wastes, comprising the following steps of: (1) collecting and pretreating raw materials; (2) preparing hydrogen by anaerobic fermentation and purifying hydrogen; (3) fermenting methane and generating power by the methane; (4) treating biogas slurry and fixing carbon dioxide with microalgae; (5) processing biogas residues and planting energy grass; and (6) recycling afterheat. The method is suitable for treating various types of organic wastes, can be used for treating agricultural organic wastes, industrial organic wastes, domestic organic garbage, mud, and the like and the industries of developing new energy, and the like. The method can carry out a concrete application example of cyclic economy, eliminates environmental pollution, obtains clean energy at the same time, has no greenhouse gas emission in the process and can realize three effects of treating wastes, generating renewable clean energy and reducing carbon dioxide emission.

Description

technical field [0001] The invention belongs to the fields of waste treatment and clean energy development, and in particular relates to a method for energy utilization of carbon dioxide zero-emission organic waste. technical background [0002] It is an indisputable fact that the excessive development and utilization of fossil fuels has caused global warming, acid rain, and ecological environment damage and degradation, and fossil fuels are also facing exhaustion. Therefore, based on environmental and energy considerations, human beings urgently need a non-polluting of renewable energy. Hydrogen energy is an ideal clean and renewable alternative fuel. It only produces water after burning, without other greenhouse gases, and can be directly and efficiently converted into electricity through fuel cells. From an environmental point of view, the use of various organic wastes for anaerobic fermentation of hydrogen production is a major research focus in recent years, and is con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00C12P5/02C12N1/12C05F5/00F02B43/12F02B63/04
CPCY02T10/32Y02E50/343Y02E50/11Y02A40/20Y02E50/30Y02P20/10Y02P20/129Y02T10/30Y02W30/40
Inventor 李东孙永明袁振宏孔晓英李连华马隆龙王忠铭庄新姝许敬亮吕鹏梅
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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