阅读说明：本技术 一种利用维生素发酵废弃物生产的有机肥及其制备方法 (Organic fertilizer produced by using vitamin fermentation waste and preparation method thereof ) 是由 王良 王东东 罗江涛 马晓军 张志� 于 2019-11-29 设计创作，主要内容包括：本发明涉及一种利用维生素发酵废弃物生产的有机肥及其制备方法,该有机肥是由下述重量配比的原料发酵而成：古龙酸结晶母液3～20%,古龙酸膜浆10～40%,抗生素废水污泥40～80%,粉煤灰3～20%。本发明将古龙酸结晶母液、古龙酸发酵液经过膜浓缩所得的古龙酸膜浆、经水解酸化、厌氧消化和好氧消化处理抗生素废水后产生的抗生素废水污泥同粉煤灰混合发酵制备有机肥,既可以实现废物资源的再利用,增加企业经济效益,同时又可解决发酵企业带来的工业污染问题。(The invention relates to an organic fertilizer produced by utilizing vitamin fermentation waste and a preparation method thereof, wherein the organic fertilizer is prepared by fermenting the following raw materials in parts by weight: 3-20% of gulonic acid crystallization mother liquor, 10-40% of gulonic acid membrane slurry, 40-80% of antibiotic wastewater sludge and 3-20% of fly ash. According to the invention, the gulonic acid membrane slurry obtained by membrane concentration of the gulonic acid crystallization mother liquor and the gulonic acid fermentation liquor, and the antibiotic wastewater sludge generated after antibiotic wastewater is treated by hydrolytic acidification, anaerobic digestion and aerobic digestion are mixed with the fly ash for fermentation to prepare the organic fertilizer, so that not only can the reutilization of waste resources be realized, the economic benefit of an enterprise be increased, but also the problem of industrial pollution brought by a fermentation enterprise can be solved.)

1. An organic fertilizer produced by utilizing vitamin fermentation waste is characterized by being prepared by fermenting the following raw materials in parts by weight:

3-20% of gulonic acid crystallization mother liquor,

10-40% of gulonic acid membrane pulp,

40-80% of antibiotic wastewater sludge,

3-20% of fly ash.

2. The organic fertilizer produced by utilizing vitamin fermentation waste according to claim 1, wherein the water content of the gulonic acid crystallization mother liquor is 40-50%, and the organic matter content is 90-98%.

3. The organic fertilizer produced by using vitamin fermentation waste according to claim 1, wherein the gulonic acid membrane pulp is obtained by membrane concentration of gulonic acid fermentation liquor, and has a water content of 50-60%, an organic matter content of 80-90%, a nitrogen content of 10-15%, a phosphorus content of 2.0-5.0% and a potassium content of 0.01-0.1%.

4. The organic fertilizer produced by using vitamin fermentation waste according to claim 1, wherein the antibiotic wastewater sludge is flocculent sludge or granular sludge obtained by hydrolysis acidification, anaerobic digestion and aerobic digestion of antibiotic wastewater, and has a sludge water content of 40-60%, an organic matter content of 35-55%, a nitrogen content of 2.0-3.5%, a phosphorus content of 0.3-1.0% and a potassium content of 0.8-1.5%.

5. The organic fertilizer produced by utilizing vitamin fermentation waste according to claim 1, wherein the water content of the fly ash is less than 1%, the potassium content is 1.0-3.5%, and the phosphorus content is 0.2-1.0%.

6. The organic fertilizer produced by utilizing vitamin fermentation waste according to claim 4, wherein the antibiotic wastewater is one or more of erythromycin production wastewater, tetracycline production wastewater and vitamin production wastewater.

7. The method for preparing the organic fertilizer by utilizing the vitamin fermentation waste as claimed in any one of claims 1 to 6, which is characterized in that: mixing the gulonic acid crystallization mother liquor, the gulonic acid membrane slurry, the antibiotic wastewater sludge and the fly ash uniformly, and ventilating, stirring and fermenting or accumulating for natural fermentation.

8. The method for preparing the organic fertilizer by utilizing the vitamin fermentation waste according to claim 7, wherein the antibiotic wastewater sludge is obtained by the following steps: hydrolyzing and acidifying the antibiotic wastewater for 24-64 hours, allowing the antibiotic wastewater to enter a digestion tank for anaerobic digestion for 30-220 days, allowing the antibiotic wastewater to enter an aerobic tank for aerobic digestion for 8-20 days, and finally settling, flocculating and dehydrating sludge at the tail end of the aerobic tank by using a plate frame.

Technical Field

The invention belongs to the technical field of biological medicines and waste resource utilization, and particularly relates to an organic fertilizer produced by using vitamin fermentation waste and a preparation method thereof.

Background

At present, the production of antibiotics and vitamins is concentrated in China, and the fermentation of antibiotics and vitamins is taken as an important industry in China, so that the great economic benefit is brought to China, and meanwhile, the serious environmental problem is brought due to a large amount of waste water and waste residues generated in the fermentation production process.

Vitamin C, also known as ascorbic acid, is usually prepared by a biological fermentation method, and generates a large amount of waste in the preparation process: gulonic acid crystallization mother liquor and a large amount of waste water. The gulonic acid mother liquor is residual liquid after the Vc biological fermentation liquor is subjected to the working procedures of centrifugation, ultrafiltration, ion exchange column exchange, triple effect evaporation, secondary concentration, gulonic acid crystallization extraction and the like, wherein the residual liquid mainly contains formic acid, acetic acid, oxalic acid, gulonic acid, sorbose, protein, nucleic acid and the like. The gulonic acid mother liquor is brownish black and viscous, the COD value reaches 1 multiplied by 106mg/L, and the pH value is less than 1.0. At present, the gulonic acid mother liquor is discharged as waste, and the environment is seriously polluted.

Therefore, how to utilize the wastes in the vitamin fermentation process as resources so as to solve the industrial pollution is a problem which is urgently needed to be solved by the current biological fermentation enterprises.

Disclosure of Invention

The invention aims to provide the organic fertilizer produced by fermenting the waste by using the vitamins, which solves the problems of waste of fermentation enterprises, realizes the reutilization of waste resources, achieves the aim of changing waste into valuable and solves the problem of industrial pollution.

The invention also aims to provide a preparation method of the organic fertilizer produced by utilizing the vitamin fermentation waste.

The technical scheme adopted for the purpose of the invention is as follows:

an organic fertilizer produced by utilizing vitamin fermentation waste is characterized by being prepared by fermenting the following raw materials in parts by weight:

3-20% of gulonic acid crystallization mother liquor,

10-40% of gulonic acid membrane pulp,

40-80% of antibiotic wastewater sludge,

3-20% of fly ash.

The water content of the gulonic acid crystallization mother liquor is 40-50%, and the organic matter content is 90-98%.

The gulonic acid membrane pulp is membrane pulp obtained by membrane concentration of gulonic acid fermentation liquor, and has the water content of 50-60%, the organic matter content of 80-90%, the nitrogen content of 10-15%, the phosphorus content of 2.0-5.0% and the potassium content of 0.01-0.1%.

The antibiotic wastewater sludge is flocculent sludge or granular sludge obtained by hydrolysis acidification, anaerobic digestion and aerobic digestion of antibiotic wastewater, and the sludge contains 40-60% of water, 35-55% of organic matters, 2.0-3.5% of nitrogen, 0.3-1.0% of phosphorus and 0.8-1.5% of potassium.

The water content of the fly ash is less than 1%, the potassium content is 1.0-3.5%, and the phosphorus content is 0.2-1.0%.

The antibiotic wastewater is one or more of erythromycin production wastewater, tetracycline production wastewater and vitamin production wastewater.

The preparation method of the organic fertilizer produced by using the vitamin fermentation waste is characterized by comprising the following steps: mixing the gulonic acid crystallization mother liquor, the gulonic acid membrane slurry, the antibiotic wastewater sludge and the fly ash uniformly, and ventilating, stirring and fermenting or accumulating for natural fermentation.

The acquisition mode of the antibiotic wastewater sludge is as follows: hydrolyzing and acidifying the antibiotic wastewater for 24-64 hours, allowing the antibiotic wastewater to enter a digestion tank for anaerobic digestion for 30-220 days, allowing the antibiotic wastewater to enter an aerobic tank for aerobic digestion for 8-20 days, and finally settling, flocculating and dehydrating sludge at the tail end of the aerobic tank by using a plate frame.

According to the invention, the gulonic acid membrane slurry obtained by membrane concentration of the gulonic acid crystallization mother liquor and the gulonic acid fermentation liquor, and the antibiotic wastewater sludge generated after antibiotic wastewater is treated by hydrolytic acidification, anaerobic digestion and aerobic digestion are mixed with the fly ash for fermentation to prepare the organic fertilizer, so that not only can the reutilization of waste resources be realized, the economic benefit of an enterprise be increased, but also the problem of industrial pollution brought by a fermentation enterprise can be solved.

Drawings

FIG. 1 is a process flow chart of the organic fertilizer produced by using vitamin fermentation waste.

Detailed Description

The present invention will now be described in detail by way of examples, which are intended to illustrate the invention and not to limit the invention. The scope and core content of the invention are to be determined by the claims.

In the following examples, the gulonic acid crystallization mother liquor refers to a mother liquor obtained after multiple concentration, crystallization and separation; the gulonic acid membrane pulp is membrane pulp obtained by membrane concentration of gulonic acid fermentation liquor; the antibiotic wastewater sludge is flocculent sludge or granular sludge obtained by hydrolysis acidification, anaerobic digestion and aerobic digestion of antibiotic wastewater, and the process mainly comprises the step of fully decomposing residual antibiotic in the wastewater; the fly ash is the fly ash which is fully combusted by a boiler and recovered by a dust remover. Their quality indexes are shown in the following figures:

	gulonic acid membrane pulp	Gulonic acid mother liquor	Fly ash	Antibiotic sludge
					Water content%	50～60%	40～50%	Less than 1%	40～60%
Dry basis organic matter%	80～90%	90～98%	0	35～55%
					Content of nitrogen%	10～15%	0	0	2.0～3.5%
The phosphorus content%	2.0～5.0%	0	0.2～1.0%	0.3～1.0%
					Content of potassium%	0.01～0.1%	0	1.0～3.5%	0.8～1.5%