A kind of anaerobic fermentation method of organic solid waste
An organic solid, anaerobic fermentation technology, applied in fermentation, waste fuel, chemical instruments and methods, etc., can solve the problems of long residence time of anaerobic digestion, large tank volume, complicated operation and management, etc., and achieve low operation and maintenance costs , The effect of large biogas production and simple technical operation
Active Publication Date: 2021-10-15
TONGJI UNIV
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Problems solved by technology
However, since most of the organic solid wastes are refractory to biodegradable substances, the anaerobic digestion has a long residence time, and generally only 20 to 30 days of residence time can achieve a moderate degree of degradation of about 30 to 50%.
The residence time of organic solid waste in the digestive system is too long, resulting in a large pool body and complicated operation and management
At present, many scholars at home and abroad have proposed to use pretreatment methods to promote anaerobic fermentation of organic solid waste, such as adding acid and alkali, heat treatment, microwave treatment, etc., but these methods are generally expensive and energy-consuming, so it is difficult to obtain Effective promotion, people are still looking for cheaper and easier to promote methods for promoting anaerobic fermentation of sludge
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Embodiment 1
[0028] like figure 1 As shown, it is a schematic structural diagram of the anaerobic fermentation of organic solid waste catalyzed by zirconium metal-organic framework materials in this embodiment. In the figure, 1—the mixing tank, 2—the mixing system of the mixing tank, 3—the delivery pump, 4—the pipeline, 5— Feed inlet, 6—anaerobic fermentation tank, 7—fermentation tank mixing system, 8—air outlet, 9—sludge discharge port.
[0029] Specific steps are as follows:
[0030] (1) Synthesis of MOF-808(Zr): Weigh trimesic acid and zirconium chloride tetrahydrate and dissolve them in a flask filled with N,N-dimethylamide / formic acid (volume ratio 1:1), stir After 1h, the resulting mixed solution was microwaved at 400KW for 20min. After the reaction was completed, it was cooled to room temperature, and the obtained solid was suction-filtered, washed, dried, and ground to obtain MOF-808 (Zr) powder; wherein trimesic acid and The molar ratio of zirconium chloride tetrahydrate is 1:2....
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The invention relates to the technical field of anaerobic fermentation, in particular to a method for anaerobic fermentation of organic solid waste, specifically adding zirconium metal organic framework material as a catalyst in the anaerobic fermentation process of organic solid waste. The present invention introduces zirconium metal-organic framework materials in the anaerobic fermentation process to improve the efficiency of anaerobic fermentation and methane production, which is beneficial to the reduction of organic solid waste after anaerobic fermentation, and the fermented biogas residue contains a large amount of nitrogen and phosphorus Elements and other trace elements that can be used for resource recovery or used as fertilizers in agricultural production processes. The method of the invention has low operation and maintenance cost, simple technical operation and strong processing capacity, and can be applied to newly built anaerobic fermentation equipment for organic solid waste or upgrade and transformation of existing equipment.
Description
technical field [0001] The invention relates to the technical field of anaerobic fermentation, in particular to a method for anaerobic fermentation of organic solid waste. Background technique [0002] At present, organic solid waste in my country mainly includes domestic sources (urban sludge, household garbage, garden waste, etc.), agricultural sources (agricultural straw, mulch, livestock and poultry manure, etc.) The annual output exceeds 6 billion tons, accounting for more than 60% of the total solid waste generation, but a scientific and reasonable management and safe treatment technology system has not yet been formed. Organic solid waste has typical pollution attributes, with complex components and many harmful media, and the land occupation and storage form multi-phase compound cross-contamination with the surrounding environment. Therefore, reasonable and scientific treatment of organic solid waste is a necessary measure to realize its harmless disposal. [0003] ...
Claims
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IPC IPC(8): C12P5/02
CPCY02E50/30C02F11/04C02F11/122C02F11/127C12P5/023C02F2103/005C12P1/00C12P39/00
Inventor 戴晓虎华煜
Owner TONGJI UNIV