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Method for treating fermentation industry waste water and producing algae powder by using microalgae

A technology for industrial wastewater and fermentation plants, applied in energy wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Good quality effect, ingenious and unique design, and small shearing force

Active Publication Date: 2013-01-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although microalgae has high environmental and economic value, the economic utilization of microalgae is still limited by the technological conditions of industrial scale cultivation of microalgae and the development of corresponding photobioreactors.

Method used

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  • Method for treating fermentation industry waste water and producing algae powder by using microalgae
  • Method for treating fermentation industry waste water and producing algae powder by using microalgae
  • Method for treating fermentation industry waste water and producing algae powder by using microalgae

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Experimental program
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Effect test

Embodiment 1

[0067] Three microalgae, Chlorella autotuophica, Nannochloropsis salina and Botyococcus Braunii were cultivated by the same process as follows, with an initial inoculation density of 1.0×10 6 cfu / ml, the culture conditions are as follows: the light cycle is 16h:8h, the light intensity is 5000lux, the culture temperature is 12°C, the pH is 6.0, and the gas ventilation rate is 0.01VVm. After continuous culture for 480 hours, see Figure 1A , 1B , 1C, 1D, 1E, 1F, and 1G.

[0068] Depend on Figure 1A The analysis shows that during the 0-144h culture process, as the culture time prolongs, the nitrogen consumption rate of autotrophic Chlorella and Nannochloropsis is accelerated, and the nitrogen consumption rate is the fastest between 48h and 96h, reaching 144h. The maximum nitrogen removal rates were 90.0% (W) and 94.0% (W), respectively, and then maintained at this level. However, during the 0-216h culture period, the nitrogen consumption rate of Botrytis braziliana accelerated...

Embodiment 2

[0073] Batch fermentation and continuous fermentation were adopted to moderately dilute under the same culture conditions, and the fermented industrial waste water after filtering out miscellaneous bacteria or algae was used as the culture medium, and the cultured concentration was 3.0×10 7 Cfu / ml high-concentration oleaginous autotrophic microalgae were inoculated into the photoreactor, the culture temperature was 25°C, the pH was 7.0, the photoperiod was 14h:10h, the light intensity was 10000lux, and the ventilation volume was 0.1VVm to cultivate autotrophs Chlorella, cultivated for 480h, the relationship between nitrogen and phosphorus removal efficiency (% (W)) and algal biomass see Figures 2A-2C shown.

[0074] Depend on Figure 2A According to the analysis, with the prolongation of the culture time, the utilization of nitrogen and phosphorus by the two culture methods was accelerated. In the process of batch culture, the utilization rate of nitrogen increased continuo...

Embodiment 3

[0078] The continuous fermentation culture method is used to dilute moderately under the same culture conditions, and the fermented industrial wastewater after filtering out bacteria or algae is used as the medium, and the cultured concentration is 1.0×10 8 The high concentration of cfu / ml oleaginous autotrophic microalgae was inoculated into the photoreactor, the culture temperature was 35°C, the pH was 7.5, the light cycle was 10h:14h, the light intensity was 15000.0lux, and the ventilation volume was 0.2VVm. To raise Chlorella, the batch culture of Chlorella vulgaris C9-JN2010 (preservation number: CCTCC NO: M 2010373) was carried out in a transparent trough photobioreactor and an airlift photobioreactor respectively, and the culture period was 240h. Nitrogen, phosphorus removal effect and biomass relationship see Figure 3A-3B shown.

[0079] Depend on Figure 3A According to the analysis, in the process of batch cultivation using transparent trough photobioreactor, the ...

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Abstract

The invention provides a method for treating fermentation industry waste water and producing algae powder by using microalgae. The method comprises the following steps of: (1) carrying out pre-treatment on the fermentation industry waste water; (2) adding the microalgae to treat; (3) collecting the microalgae; and (4) preparing the algae powder. Preferentially, the pre-treatment step comprises: diluting the fermentation industry waste water and adjusting a pH (Potential Of Hydrogen) value of the fermentation industry waste water to be suitable for growth of the microalgae, wherein CO2 gas which is collected from released gas of a fermentation factory serves as a main carbon source of microalgae cultivation, treatment is carried out in a bioreactor, and a transparent groove-type closed bioreactor is preferentially selected. The method for treating the fermentation industry waste water and producing the algae powder by using the microalgae achieves emission reduction of CO2 and production of the algae powder while treating the fermentation industry waste water, so that the cost of production can be reduced, the comprehensive utilization of waste resources can be achieved, and the energy-saving and emission-reduction green production can be realized. The method is suitable to the microalgae cultivation in a laboratory and industrial large-scale microalgae cultivation, is clever and unique in design, and is suitable to large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical fields of environmental engineering and bioenergy, more specifically, to the technical field of photobioreactors, in particular to a method for using microalgae to treat and ferment industrial wastewater and produce algae powder. Background technique [0002] Today, energy shortage, environmental pollution and food shortage are three major world problems. Microalgae play a very important role in solving the above problems. [0003] Microalgae are photoautotrophic microorganisms with high light utilization efficiency and fast and efficient uptake of nutrients from the environment (such as CO 2 , nitrogen, phosphorus, etc.) and the ability to transform into organic compounds, is the primary producer in the ecosystem, plays a huge role in the entire material cycle, has high production efficiency, and has attractive development prospects. Microalgae culture only needs some simple nutrients, ammonium or nitrate, phos...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCY02W10/37
Inventor 杨海麟张玲夏小乐辛瑜王武李昌灵李宇佶陈吉铭王泽霖
Owner JIANGNAN UNIV
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