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Stink inhibitor for microalgae anaerobic biological fermentation and preparation method thereof

A technology of anaerobic organisms and inhibitors, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., can solve the problems of adsorption can not play a continuous inhibitory effect, carcinogenic, troublesome operation, etc., to improve adsorption Catalytic degradation ability, reduced replacement frequency, and reduced usage

Inactive Publication Date: 2020-04-17
TIANJIN AGRICULTURE COLLEGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, physical adsorption has a certain degree of saturation. When the concentration of odorous substances exceeds a certain limit during anaerobic fermentation, the adsorption cannot play a continuous inhibitory role, and the adsorption material needs to be replaced frequently.
Frequent replacement of adsorbents is not only troublesome for large and medium-sized industrial production, but also significantly increases the cost of the enterprise, and at the same time faces the problem of retreatment of a large number of adsorbents.
The main components of masking-type odor inhibitors contain carcinogenic aromatic compounds, which mainly work through aroma masking. They can play a certain role in odor suppression in public environments with low odor concentrations or in daily household environments, but they are not suitable for industrial production processes. The strong odor pollutes the environment in medium, and it is difficult for low-concentration chemical odor inhibitors to play an odor-inhibiting effect
In addition, because chemical masking odor inhibitors are usually teratogenic and carcinogenic, using higher concentrations of chemical inhibitors will not only have a significant negative impact on the anaerobic fermentation reaction, but will also affect the health of the operator and the respiratory system. cause a lot of damage

Method used

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  • Stink inhibitor for microalgae anaerobic biological fermentation and preparation method thereof
  • Stink inhibitor for microalgae anaerobic biological fermentation and preparation method thereof
  • Stink inhibitor for microalgae anaerobic biological fermentation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare 1L of 0.3g / L biological enzyme solution, the mass ratio of cellulase: lipase and yeast hydrolyzate is 1:1:1, add 100 grams of polyvinyl alcohol with a polymerization degree of 1650 to the 0.3g / L biological enzyme solution , heated to 30-40°C and stirred for 5 hours to complete the modification process, the modified solution was passed through the microtube nozzle at a rate of 70 drops per minute (about 100 microliters per drop), and the mass concentration was 4 % dilute boric acid solution, filter and wash the obtained microsphere products, and select microspheres with a diameter of 0.5cm-1cm, and activate them with phosphate buffer (pH=7, 0.1M) at 35±2°C 3 times, 60 minutes each time.

[0028] Add 100g of the above-mentioned malodor inhibitor prepared by anaerobic fermentation into a 10L microalgae anaerobic fermentation reactor with a solid content rate lower than 5%, and perform anaerobic fermentation at 35°C for 25 days, using three-point comparison every da...

Embodiment 2

[0031] Prepare 5L of 0.5g / L biological enzyme solution, the mass ratio of cellulase: lipase and yeast hydrolyzate is 1:1:1, add 500 grams of polyvinyl alcohol with a polymerization degree of 1850 to the 0.3g / L biological enzyme solution , heated to 30-40°C and stirred for 5 hours to complete the modification process, the modified solution was passed through the nozzle at a rate of 70 drops per minute (about 100 microliters per drop), and the mass concentration was 4% Dilute boric acid solution, filter and wash the obtained microsphere product, and select microspheres with a diameter of 0.5cm-1cm, and activate them three times with phosphate buffer (pH=7, 0.1M) at 35±2°C. 60 minutes each time.

[0032] Use 100L of microalgae with a solid content of about 7% as raw material to carry out anaerobic biological fermentation reaction, and use 500g of odor inhibitor prepared by the above method as an auxiliary material, and add it to the waste gas purification absorber of the microalg...

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Abstract

The invention provides a stink inhibitor for microalgae anaerobic biological fermentation and a preparation method thereof. The stink inhibitor is prepared from the following raw materials: polyvinylalcohol, biological enzyme and boric acid, wherein the mass ratio of the polyacetal to the biological enzyme is (7-10): (0.025-0.05). The biological enzyme is a mixture of cellulase, lipase and yeasthydrolysate, and the mass ratio of the cellulase to the lipase to the yeast hydrolysate is (0.8-1.2): (0.8-1.2): (0.8-1.2). The inhibitor provided by the invention improves the adsorptive catalytic degradation ability to malodorous organic matters, and because the inhibitor provided by the invention has adsorption and biological catalysis abilities at the same time, and the activated malodorous inhibitor has certain regeneration performance in use, the usage amount and replacement frequency in the industrial production process are reduced.

Description

technical field [0001] The invention belongs to the technical field of odor inhibitors, and in particular relates to an odor inhibitor for microalgae anaerobic biological fermentation and a preparation method thereof. Background technique [0002] The malodorous gas in the anaerobic fermentation process of microalgae mainly comes from volatile organic compounds (VOCs) produced by anaerobic decomposition of macromolecular organic matter, such as hydrocarbons, alkenes, alkynes, benzene series, oxygenates, chlorobenzene and Sulfide etc. In addition to controlling the anaerobic reaction conditions of microalgae (such as reaction temperature, moisture content of raw materials, pH) and installing tail gas purification treatment equipment, the development and use of odor inhibitors has become a hot spot in the study of reducing the odor pollution of anaerobic fermentation. At present, the odor inhibitors widely used in industry are mainly physical adsorption type odor inhibitors a...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/84B01D53/44
CPCB01D53/8687B01D53/84B01D53/02Y02A50/20
Inventor 刘刚毕相东肖雅文于文晗
Owner TIANJIN AGRICULTURE COLLEGE
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