Production method of microalgae grease based on low-carbon emission recycling of domestic sewage

A technology for domestic sewage and microalgae oil, which is applied in the production of fat oil/fat, chemical instruments and methods, and fat production. It can solve the problems of low carbon recovery rate and high cost of microalgae oil, reduce pollution, reduce production costs, The effect of high shock load resistance

Inactive Publication Date: 2011-01-26
HARBIN INST OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low carbon recovery rate and high cost of microalgae oil in the

Method used

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  • Production method of microalgae grease based on low-carbon emission recycling of domestic sewage
  • Production method of microalgae grease based on low-carbon emission recycling of domestic sewage
  • Production method of microalgae grease based on low-carbon emission recycling of domestic sewage

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specific Embodiment approach 1

[0009] Embodiment 1: In this embodiment, the microalgae oil production method based on low-carbon emission of domestic sewage is carried out according to the following steps: sterilize the waste water that has undergone primary treatment, and then introduce it into a photobioreactor; Microalgae were then inoculated into the photobioreactor with CO 2 As an aeration gas source for cultivation, the cultivation process runs intermittently until the microalgae grows logarithmically and the density reaches above 0.2g / L, and then changes to continuous water inflow. During the continuous water inflow, the pH is always kept at 5-10, and the collected The microalgae in the water are dehydrated and then the oil is extracted to obtain the microalgae oil.

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment differs from Embodiment 1 in that: the wastewater is domestic sewage, beer wastewater or molasses wastewater. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the sterilization pretreatment adopts high temperature and high pressure, calcium hypochlorite, ozone, Cl 2 , chlorine dioxide or ultraviolet sterilization. Other steps and parameters are the same as those in the first or second specific embodiment.

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Abstract

The invention relates to a production method of microalgae grease based on low-carbon emission recycling of domestic sewage, belonging to the field of grease production and solving the problems of low carbon recovery rate and high domestic sewage cost in the domestic sewage treatment process. The method of the invention comprises the following steps of: sterilizing primarily treated wastewater and guiding into a photobioreactor; and then, inoculating microalgae in the photobioreactor, culturing by using CO2 as an aeration air source, collecting the microalgae in effluent and dewatering to extract the grease to obtain microalgae grease. The method of the invention has the advantages of high carbon recovery rate and low grease production cost and is applied to the biodiesel field.

Description

technical field [0001] The invention belongs to the field of oil production. Background technique [0002] Because biodiesel has the characteristics of "carbon balance", it can alleviate the global greenhouse effect, and its pollutant emission level is lower than that of petrochemical diesel, so the global production of biodiesel has increased significantly in recent years. However, the high cost of biodiesel and Insufficient supply of raw materials has hindered the further popularization and application of biodiesel. In the production cost of biodiesel, the proportion of raw materials is the largest, generally between 70% and 80%. At present, countries in the world mainly use vegetable oil or waste cooking oil as raw materials for industrial production of biodiesel, and the cost of biodiesel produced in this way is Higher than petrochemical diesel, in the absence of policy preference, the market competitiveness is very low, and the output is limited, unable to meet the gro...

Claims

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Application Information

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IPC IPC(8): C11B1/00C11B1/04C11B1/10C12N1/12C02F9/14C12P5/02C12P7/08C10L1/02
CPCY02E50/13Y02E50/343Y02E50/10Y02E50/30
Inventor 冯玉杰李超刘佳张大伟
Owner HARBIN INST OF TECH
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