Anaerobic digestion treatment method for 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, low disposal capacity and high disposal cost of antibiotics, achieve good economy and promotion value, reduce disposal , the effect of reducing the production of ammonia inhibition

Active Publication Date: 2019-03-08
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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  • Anaerobic digestion treatment method for 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, use a knife grinder to crush the fermented slag to less than 50 meshes, then add water to adjust the solid content of the fermented slag to 20% for use. The fermented slag was treated with alkali heat and ultrasonic respectively, and 4 treatment groups were set up. Among them, the CK group is the control group without any treatment; the A group is the single alkali heat treatment group, adding 0.05mol / L NaOH, and digested at 130°C for 30min; the B group is the single ultrasonic treatment group, and the ultrasonic frequency is set to 25kHz. The preferred energy input is 10000kJ / kg; group C is alkali heat treatment + ultrasonic treatment group, add 0.05mol / L NaOH, digest at 130°C for 30min, and then perform ultrasonic treatment, the frequency of ultrasonic is 25kHz, the prefe...

Embodiment 2

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

[0045] The pretreated fermentation slag is used for anaerobic digestion, inoculated with 20% of anaerobic sludge collected from a paper mill, and 15...

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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 in particular relates to a resource utilization and reduction method of refractory hazardous waste. Background technique [0002] The fermentation process of artificially cultivating specific microorganisms and extracting active ingredients in the culture fluid is the main production method of antibiotics. The fermentation production process of antibiotics will produce a large amount of fermentation mycelium residues. my country is a big country in the use of antibiotics, and it is also a big country in the production of antibiotics. In 2013, the output of antibiotics in my country reached 121,200 tons. According to the production of 1 ton of antibiotic raw materials, 50 tons of fermentation residue (wet residue) will be produced. The production of antibiotic fermentation residue in my country every year The amount has reached more than 6 million tons, and the treatment and disposal of ant...

Claims

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Application Information

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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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