Trap-type carbon replenishing device for culturing microalgae of opened pool and carbon replenishing method thereof

Patent metadata

Field	Value
Publication number	US-9567557-B2
Application number	US-201214396567-A
Country	US
Kind code	B2
Filing date	May 7, 2012
Priority date	May 7, 2012
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

The invention relates to the field of microalgae culture and specifically relates to a trap-type carbon supplement device and carbon supplement method for cultivating microalgae in an open pond. The trap-type carbon supplement device for cultivating microalgae in an open pond, comprises a trap-type container, a partition plate and a gas distributor, wherein the gas distributor is positioned at the culture solution inlet of the trap-type carbon supplement device; the thickness of the trap-type carbon supplement device on the side of the culture solution inlet is 0.5-2 times of the depth of the culture solution in the open pond; the gap between the lower end of the partition plate and the bottom of the trap-type container is 0.5-2 times of the thickness of the trap-type carbon supplement device on the side of the culture solution inlet; the upper end of the partition plate is higher than the wall of the trap-type container; and the width of the partition plate is matched with the trap-type container. The carbon supplement device of the invention can make the gas-liquid contact time longer and reduce the depth of the trap-type container, therefore it can reduce the flow resistance of the liquid in the carbon supplement device and save energy consumption.

First claim

The invention claimed is:

1. A trap-type carbon supplement device for cultivating microalgae in an open pond, comprises a trap-type container, a partition plate and a gas distributor, wherein the gas distributor is positioned at the culture solution inlet of the trap-type carbon supplement device; the thickness of the trap-type carbon supplement device on the side of the culture solution inlet is 0.5-2 times of the depth of the culture solution in the open pond; the gap between the lower end of the partition plate and the bottom of the trap-type container is 0.5-2 times of the thickness of the trap-type carbon supplement device on the side of the culture solution inlet; the upper end of the partition plate is higher than the wall of the trap-type container; and the width of the partition plate is matched with the trap-type container.

2. The trap-type carbon supplement device according to claim 1 , wherein the thickness of the trap-type carbon supplement device on the side of the culture solution inlet is 5-50 cm.

3. The trap-type carbon supplement device according to claim 1 , wherein the depth of the trap-type container is 15-150 cm, the thickness thereof is 20-200 cm, and the width thereof is consistent with that of the open pond.

4. The trap-type carbon supplement method according to claim 1 , wherein the trap-type container has a flat bottom, a flat bottom with round corners, a conical bottom or a semi-circular bottom.

5. The trap-type carbon supplement device according to claim 1 , wherein the thickness of the partition plate is 1-5 cm.

6. The trap-type carbon supplement device according to claim 1 , wherein the blade tip/tips of a stirrer/stirrers arranged on one side or two sides of the carbon supplement device is/are lower than the bottom of the open pond, or the blade tip/tips of a stirrer/stirrers arranged on one side or two sides of the partition plate is/are lower than the bottom of the open pond.

7. A carbon supplement method for cultivating microalgae in an open pond based on the trap-type carbon supplement device of claim 1 , wherein the trap-type carbon supplement device is embedded into the bottom of the open pond, the upper edge of the trap-type container of the trap-type carbon supplement device is aligned with the bottom of the open pond; the partition plate is above the liquid surface of the culture solution in the open pond, so that the culture solution can flow into the downcomer of the trap-type carbon supplement device from the culture solution inlet of the trap-type carbon supplement device under the driving of the stirrer(s), to be in contact with the CO 2 bubbles released from the gas distributor; then the culture solution mixed with the CO 2 bubbles flows through the riser and finally flows out of the culture solution outlet of the trap-type carbon supplement device;
the flow velocity of the culture solution on the side of the culture solution inlet of the trap-type carbon supplement device is 15-100 cm/s; and
the flow rate of the CO 2 of the gas distributor in the trap-type carbon supplement device, calculated as pure CO 2 under standard condition, is 0.1-20 L/min per meter of the width of the open pond.

8. The carbon supplement method according to claim 7 , wherein the depth of the culture solution in the open pond is 2-30 cm.

9. The carbon supplement method according to claim 7 , wherein the CO 2 is one or more of cleaned flue gas, industrial CO 2 gas, pure CO 2 gas or air mixed with CO 2 , or liquid CO 2 .

10. The carbon supplement method according to claim 7 , wherein the medium for cultivating microalgae is Zarrouk medium, SM medium, ASP 2 medium or BG-11 medium.

11. The carbon supplement method according to claim 7 , wherein the microalgae are spirulina, scenedesmus, haematococcus pluvialis, Dunaliella sauna, chlorella or chlamydomonas.

Assignees

• Cong Wei
• Sun Zhongliang
• Liu Ming
• Wu Xia
• Zhang Dongmei
• Wen Shumei
• Inst Process Eng Cas

Inventors

• Cong Wei
• Sun Zhongliang
• Liu Ming
• Wu Xia
• Zhang Dongmei
• Wen Shumei

Classifications

• C12M29/06

  Nozzles; Sprayers; Spargers; Diffusers (per se B01F23/231, B01J19/26) · CPC title

• C12N1/12

  Unicellular algae; Culture media therefor (as new plants A01H13/00) · CPC title

• C12M27/06

  with horizontal or inclined stirrer shaft or axis · CPC title

• C12M27/20

  Baffles; Ribs; Ribbons; Auger vanes · CPC title

• C12M21/02

  Photobioreactors (culturing algae A01G33/00, A01H4/001, C12N1/12) · CPC title