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Integrated system for productioin of biofuel feedstock

A technology for biofuels and raw materials, applied in the field of cultivation systems for producing microalgal biomass, can solve the problem of high cost, achieve the effects of reducing pollution, overcoming seasonal climate changes, and expanding production capacity

Inactive Publication Date: 2011-06-08
WASHINGTON STATE UNIV RES FOUND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing fiber-derived sugars for oil production is an option to reduce the cost of raw materials, but it can be seen from the delay in industrial production of cellulosic ethanol that the cost is still high due to certain technical obstacles

Method used

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  • Integrated system for productioin of biofuel feedstock
  • Integrated system for productioin of biofuel feedstock
  • Integrated system for productioin of biofuel feedstock

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] Example 1. Flowchart for a given system

[0044] figure 1 The combined heterotrophic and autotrophic culture process is summarized, including the production equipment from algae to biofuel, and Table 1 lists the key equipment and pipelines.

[0045] Table 1 figure 1 List of equipment and pipelines in

[0046]

[0047]

[0048] figure 2 Mass balance diagrams for each process at laboratory and pilot plant levels are depicted for this integrated process producing 10 million gallons of biodiesel and for known yields. It can be seen from the mass balance diagram that when 10MMg / yr biodiesel is produced through this process, all the nutrients and inorganic carbon required can basically meet the input of organic carbon required. Further analysis showed that 1 / 5 of the organic carbon input could be satisfied by the treated waste organic matter in the hydrolysis reactor or the direct utilization of crude glycerol. Additional inputs in the form of hydrolysis reactors ...

example 2

[0049] Example 2. Heterotrophic culture

[0050] Various organic wastes can be used as feedstock for heterotrophic culture processes. After different degrees of pretreatment, products containing oily sugars, short-chain fatty acids and / or glycerin can be obtained. Heterotrophic fermentation can be performed using these carbon sources in large-scale fermenters where pH, dissolved oxygen, and temperature are controlled in order to provide an optimal condition for cell growth and maximum cell density, these are technical operators well known. Most of the carbon and some of the nitrogen and phosphorus are consumed in the process, however, a certain amount of COD, nitrogen and phosphorus will also remain in the effluent. Fortunately, the effluent will serve as a nutrient source for autotrophic algae cultures, thereby reducing costs and increasing the reuse of system inputs. By analogy, the effluent of the final autotrophic culture process will have lower levels of COD, nitrogen ...

example 3

[0066] Example 3. Other algae species that can be applied to the process

[0067] In addition to Chlorella sorokiniana in Examples 2, 4 and 5, many other species of microalgae can be cultured under heterotrophic and autotrophic conditions and can be used in the processes described in Examples 1 and 2. Although experimental data on the cultivation of these microalgal strains by this process are not presented here, these microalgal species can be used as production strains because of their ability to grow autotrophically and heterotrophically.

[0068] Table 6 Algae that can grow under heterotrophic and / or autotrophic conditions

[0069]

[0070]

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Abstract

Disclosed is a culture system for the production of algae biomass to obtain lipid, protein and carbohydrate. By integrating heterotrophic processes with a phototrophic process in parallel, this system provides year around production in colder climates. By integrating heterotrophic processes with a phototrophic process in series, this system creates a two-stage, separated mixed- trophic algal process that uses organic carbon and nutrients for the production of seed in the heterotrophic process, followed by release of cultured seed in large-scale phototrophic culture for cell biomass accumulation. Organic carbon source including waste materials can be used to feed the heterotrophic process. The production capacity ratio between the heterotrophic and the phototrophic processes can be adjusted according to season and according to the availability of related resources. The systems are used for producing and harvesting an algal biofuel feedstock as well as other potential high-value products. The sequence and approach enhances utilization of carbon and nutrient waste-streams, provides an effective method for controlling contamination, adds flexibility in regard to production and type of available products, and supplies greater economic viability due to maximized use of available growth surface areas.

Description

[0001] The claims of this patent application benefit from the U.S. provisional patent application serial number 60 / 084,708 filed on July 30, 2008, and its complete content can be found in the references. technical field [0002] The present invention relates to a culture system for producing microalgae biomass to obtain oil, protein and sugar. Through the parallel culture mode of heterotroph and autotroph, the culture system can produce all year round in cold climate. Through the culture method of heterotroph and autotroph in series, this system establishes a two-stage, independent mixed-trophic microalgae culture process, that is, the use of organic carbon sources and nutrients for heterotrophic culture to produce vegetative algae seeds, and then these Large-scale autotrophic cultures are performed to obtain cell biomass. Among them, organic carbon sources include wastes that can be used in heterotrophic culture. The production ratios of heterotrophic and autotrophic proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/00C12P1/00C02F3/32C12R1/89C12P7/649
CPCC12P7/6463C12N1/12Y02E50/13C12P7/649C02F3/32C12M21/02C12M23/18C12M23/58C12M41/06C12M41/12C12M41/34C12M47/06Y02W10/37Y02E50/10
Inventor 迟占有郑玉彬本·路克陈树林
Owner WASHINGTON STATE UNIV RES FOUND INC
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