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Method for absorbing CO2 in compost by microalgae and recycling microalgae

A technology of composting and microalgae, applied in separation methods, preparation of organic fertilizers, chemical instruments and methods, etc., can solve problems such as climate warming and achieve the effect of reducing raw material costs

Inactive Publication Date: 2018-08-24
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the invention is to solve the problem of composting producing greenhouse gas CO 2 technical problems that contribute to climate warming, providing a

Method used

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  • Method for absorbing CO2 in compost by microalgae and recycling microalgae
  • Method for absorbing CO2 in compost by microalgae and recycling microalgae

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specific Embodiment approach 1

[0019] Specific implementation mode 1: In this implementation mode, microalgae are used to absorb CO in compost 2 And the method of recycling is as follows:

[0020] 1. The CO produced by the aerobic composting reactor 2 The gas is passed into the microalgae incubator through the air pump, and the microalgae are cultivated under the condition of airtight and light. After a growth cycle of the microalgae, the algae liquid and algae residue in the microalgae incubator are put into the sedimentation tank and conditioned. After the agent is mixed, it flows back to the compost in the aerobic composting reactor through the reflux pump until the mass ratio of compost C to N is 20-25:1, and the moisture content of the compost is 55%-65%;

[0021] 2. Repeat step 1 to complete the use of microalgae to absorb CO in compost 2 and recycling methods;

[0022] The light conditions in step 1 are: light intensity 2500±10Lx, light-to-dark ratio 18h:6h, temperature 25±3°C.

specific Embodiment approach 2

[0023] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the compost in the aerobic composting reactor described in step 1 uses kitchen waste, manure or straw compost. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the conditioning agent in step 1 is sawdust, bran or rice husk. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for absorbing CO2 in compost by microalgae and recycling the microalgae, relates to a method for absorbing the CO2 in the compost by the microalgae and recycling the microalgae in the compost, belongs to the field of environment-friendly compost, and aims to solve the technical problem that greenhouse gas CO2 produced by the compost causes climate warming. The method comprises the following steps: 1, inflating the CO2 gas produced by an aerobic composting reactor into a microalgae incubator through a gas pump, culturing the microalgae under a closed light irradiation condition, mixing algae liquid and algae residues with a conditioning agent after a microalgae growth cycle, then enabling a mixture to return back into the compost in the aerobic composting reactor through a reflux pump till the C / N ratio of the compost is 20:1 to 25:1 and the water content is about 60%; 2, repeating the step 1. By the method, release of the greenhouse gas CO2 in the composting process is reduced, secondary pollution is not caused, manpower and material resources are greatly saved, energy is saved, environment friendliness is achieved, and economic benefits are improved.

Description

technical field [0001] The invention relates to a method of utilizing microalgae to absorb CO produced in compost 2 The method for recycling gas into compost belongs to the field of environment-friendly composting. Background technique [0002] Aerobic composting means that under aerobic conditions, aerobic bacteria absorb, oxidize, and decompose waste. Through their own life activities, microorganisms oxidize part of the absorbed organic matter into simple inorganic matter, and at the same time release the energy required for the growth of microorganisms, while the other part of the organic matter is synthesized into new cytoplasm, so that the microorganisms continue to grow and reproduce. The process of producing more living organisms. Composting, as a solid waste recycling technology, produces greenhouse gas CO due to the degradation of organic matter in the process. 2 , global climate change caused by greenhouse gases has become a serious environmental problem. After...

Claims

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Application Information

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IPC IPC(8): C05F17/00B01D53/62
CPCB01D53/62C05F17/10C05F17/15Y02W30/40Y02P20/10Y02P20/151
Inventor 魏自民张旭赵越魏丹李英军李艳杰刘振勇骆生曹金香
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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