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A kind of anaerobic digestion treatment method of antibiotic fermentation residue

A technology of anaerobic digestion and treatment method, applied in the directions of fermentation, biosynthesis, waste fuel, etc., can solve the problems of high biological toxicity of antibiotics, high treatment cost, low disposal capacity, etc., achieve good economy and promotion value, reduce disposal , the effect of reducing the production of ammonia inhibition

Active Publication Date: 2020-08-11
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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Problems solved by technology

[0005] At present, there are still some problems in the anaerobic digestion technology of antibiotic fermentation. For example, the solid content of the fermentation system is usually below 5%, and the lower unit volume disposal capacity leads to higher processing costs; Antibiotics are highly biotoxic and cause inhibition of the anaerobic digestive system

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  • A kind of anaerobic digestion treatment method of antibiotic fermentation residue

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Embodiment 1

[0036] Obtained lincomycin fermentation residue from a pharmaceutical factory, the total organic carbon content is 34.4%, the total nitrogen content is 3.16%, and the lincomycin content is 3043mg / kg. First, a knife grinder is used to crush the fermentation residue to below 50 mesh, and then clean water is added to adjust the solid content of the fermentation residue to 20% for later use. The fermentation residue was treated with alkaline heat and ultrasound respectively, and a total of 4 treatment groups were set up. The CK group is the control group, which does not undergo any treatment; the A group is the single-alkali heat treatment group, with 0.05mol / L NaOH, and the digestion is at 130°C for 30 minutes; the B group is the single ultrasonic treatment group, and the ultrasound frequency is set to 25kHz. The preferred energy input is 10000kJ / kg; Group C is the alkali heat treatment + ultrasonic treatment group, add 0.05mol / L NaOH, digest at 130°C for 30 minutes, and then perf...

Embodiment 2

[0044] Obtain the oxytetracycline fermentation residue from a pharmaceutical factory, the total organic carbon content is 41.5%, the total nitrogen content is 4.58%, and the oxytetracycline content is 4289mg / kg. First, use a knife grinder to crush the fermentation residue to below 50 mesh, then add clear water to adjust the solid content of the fermentation residue to 30% and add 0.20mol / L of Ca(OH) 2 , Digestion in an autoclave at 120°C for 60 minutes, let cool, and then perform ultrasonic treatment. The ultrasonic sound energy density is 2w / ml, and the treatment time is 30min. After the above treatment, the concentration of organic carbon in the supernatant of the fermentation residue reaches At 17269mg / kg, the concentration of total nitrogen reached 2215mg / kg, and the concentration of oxytetracycline dropped to 351mg / kg.

[0045] Use the pretreated fermentation residue for anaerobic digestion, inoculate 20% of the anaerobic sludge collected in the paper mill, and add 15% straw ...

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Abstract

The invention discloses an anaerobic digestion treatment method for antibiotic fermentation residue, which comprises the following steps that: (1) to-be-treated antibiotic fermentation residue is mechanically crushed until the crushed grain size is less than 50 meshes; (2) the crushed fermentation residue is added with water for regulation until the solid content is 10 to 30 percent, and is addedwith an alkaline agent, so that fermentation residue mixed liquid is obtained; (3) the fermentation residue mixed liquid is heated; (4) the heated fermentation residue is ultrasonically treated; (5) the ultrasonically treated fermentation residue is mixed with anaerobic sludge, and meanwhile, a straw digestion solution is added; after the solid content is regulated to 5 to 15 percent and pH is regulated to 7.0 to 7.5, anaerobic digestion is carried out, and produced methane is collected. According to the invention, on the basis of reducing the amount of antibiotic fermentation residue, methaneenergy can be recycled, so the method has good economical efficiency; and the method is applicable to the treatment of a variety of antibiotic fermentation residues.

Description

Technical field [0001] The invention belongs to the field of solid waste disposal, and particularly relates to a resource utilization and reduction method of difficult-to-dispose hazardous waste. Background technique [0002] The fermentation process of artificially cultivating specific microorganisms and extracting effective ingredients from the culture broth is the main production method of antibiotics. The fermentation production process of antibiotics will produce a large amount of fermented mycelium residue. my country is a big country in the use of antibiotics as well as a country in which antibiotics are produced. In 2013, the production of antibiotics in my country reached 121,200 tons. According to the production of 1 ton of antibiotics, the production of 50 tons of fermentation residue (wet residue) is calculated. The amount has reached more than 6 million tons, and the disposal of antibiotic fermentation residue has become a common problem for antibiotic companies in e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02
CPCC12P5/023C12P2201/00C12P2203/00Y02E50/30Y02P20/59
Inventor 张弛钟重冯一舰孙璐
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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