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Wastewater treatment method adopting O2 produced by photosynthetic organisms to replace traditional aeration as well as application

A technology for photosynthetic biology and wastewater treatment, applied in biological water/sewage treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve problems such as not being able to significantly reduce energy consumption, achieve small size, reduce carbon and nitrogen Phosphorus nutrient concentration, effect of reducing eutrophication

Inactive Publication Date: 2015-11-18
NANNING COLIN BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite using optimized air or O 2 Distributed systems can partially improve O 2 Mass transfer effect, but can not significantly reduce energy consumption

Method used

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  • Wastewater treatment method adopting O2 produced by photosynthetic organisms to replace traditional aeration as well as application
  • Wastewater treatment method adopting O2 produced by photosynthetic organisms to replace traditional aeration as well as application
  • Wastewater treatment method adopting O2 produced by photosynthetic organisms to replace traditional aeration as well as application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] photosynthetic organisms self-generated O 2 The wastewater treatment method instead of traditional aeration is used in the raw water treatment steps of fresh starch industrial wastewater as follows:

[0053] Chlorella vulgaris was selected locally. Aspergillus niger was used to simulate the photosynthetic organism-bacteria symbiosis system.

[0054] Use a 3.6L glass (transparent) fermenter (diameter-to-height ratio = 3) as the aeration tank (container), install 2×5w LED (cold light source, white light) on the side wall of the tank for lighting, and use natural light during the day. Use artificial light to supplement light at night;

[0055] Fill 2.5 liters of raw water (not sterilized) of fresh starch industrial wastewater as the medium; insert 100mL pre-cultivated Chlorella (1×10 7 cells / mL) and 1mL Aspergillus niger spore suspension (1×10 8 cells / mL);

[0056] At room temperature, cultivate Chlorella statically, and use a microbubble device (composed of a 12W aqu...

Embodiment 2

[0060] photosynthetic organisms self-generated O 2 Instead of the traditional aeration wastewater treatment method, the treatment steps for starch industrial wastewater that is rotten and blackened and contains more microorganisms are as follows:

[0061] Chlorella (Chlorellavulgaris) and Aspergillus niger (Aspergillus niger) were selected locally to simulate the photosynthetic organism-bacteria symbiotic system.

[0062] The starch industrial waste water (raw water, not sterilized) that was put into place at room temperature for 2 weeks, corrupted and blackened and contained more microorganisms was used as a culture medium.

[0063] Use a 15.0L polypropylene transparent barrel (diameter-to-height ratio = 1.5) as the aeration tank (container) for the experiment, install 2×18w LEDs (mixed color, white light, main lighting) on ​​the top of the tank at a height of 15cm, and install 2× on the side 5wLED (red: blue = 1:1, supplementary lighting), 24h light;

[0064] Load 12.0 lit...

Embodiment 3

[0069] photosynthetic organisms self-generated O 2 Instead of the traditional aeration wastewater treatment method, the raw water used for fresh starch industrial wastewater is boiled for 10 minutes to kill microbial nutrients. The treatment steps are as follows:

[0070] Chlorella (Chlorellasorokiniana), Aspergillus niger (Aspergillus niger) for local screening.

[0071]The raw water of fresh starch industrial wastewater was boiled for 10 minutes to kill microbial nutrients and then used as a medium.

[0072] A 10.0L stainless steel tank (diameter-to-height ratio = 2.5) was used as the aeration tank (container) for the experiment. A 1×11w energy-saving lamp (6500K, warm color) was installed at the opening above the tank body, and the lampshade was used to focus the light on the inside of the tank. The end of the energy-saving lamp is 10cm away from the height of the tank.

[0073] Load 8.0 liters of waste water medium into 500mL of pre-cultured microalgae (1×10 7 cells / mL)...

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Abstract

The invention discloses a wastewater treatment method adopting O2 produced by photosynthetic organisms to replace traditional aeration. Photosynthetic organism cells such as microalgae obtained through pre-culture or obtained from a culture system are added to a transformed oxidative aeration device and reach a certain proportion, and then micro O2 bubbles are produced and secreted under the photosynthesis of the photosynthetic organisms and provided for other microorganisms in a photosynthetic organism-bacterium symbiotic system for growth and metabolism. Compared with the processes for providing large bubbles through mechanical stirring and blowing, the method has the advantages as follows: 1, the method is mild, efficient and energy-saving; 2, the CO2 emission is reduced, CO2 which is to be emitted into the atmosphere originally is recovered and immobilized into biomass under the photosynthesis; 3, the method is environment-friendly, under the condition that existing traditional technologies are basically not changed, the concentration of carbon, nitrogen and phosphorus nutrients in effluent is reduced, and eutrophication of natural water bodies receiving the effluent is reduced.

Description

technical field [0001] The invention belongs to the field of environmental protection, and can also be used in the field of renewable bio-energy, or both fields. In particular, it relates to a new process for wastewater treatment by photosynthetic organisms, which improves the aeration stage process of the existing wastewater treatment. More specifically, photosynthetic organisms cells were first obtained by pre-cultivation; then the photosynthetic organisms were put into the modified aeration device; under light conditions, the photosynthetic organisms produced O 2 , and O 2 secreted into the environment; photosynthetic organisms and other microorganisms in the system obtain O 2 , accelerate growth and metabolism; microbial action degrades and absorbs adsorbed pollutants; overall, significantly reduces energy demand in the aeration phase. Background technique [0002] The photosynthetic organisms involved in the present invention belong to tiny aquatic plants and (or) mi...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F3/32
CPCY02W10/10
Inventor 周文广张云开周瑜马宁付婷婷蒙健宗
Owner NANNING COLIN BIOTECH CO LTD