Innocent treatment of alcohol slops and application technique

Abstract

The invention relates to treatment of industrial wastes and a use of the industrial waste in producing an organic liquid fertilizer, and is applied to the fields of agriculture and forestry. Industrial liquid wastes include an alcohol liquid waste, a molasses liquid waste and a starch fermentation liquid waste; the industrial liquid wastes contain lots of nutrient elements needed by plants, such as amido acids, humic acids and organic matters, and also contain some harmful bacteria; water insoluble matters, suspended matters and the COD (Chemical Oxygen Demand) value in the industrial liquid wastes are about 5*10<5>mg / L; therefore, if the industrial liquid wastes are directly used without treatment, hazards such as environmental pollution and rot roting and seedling wilting of plants can be caused. Innocent treatment of liquid wastes mainly comprises the following steps of acidification, oxidization, biochemical treatment, neutralization, flocculation and precipitation separation treatment; after the industrial liquid wastes are subjected to innocent treatment, the mother liquor obtained is used for producing a green environment-friendly organic liquid fertilizer; the fertilizer is capable of achieving the effects of promoting crops to absorb nutrients, keeping nutrient balance and improving the taste and quality of products, and the yield of crops can be increased by 20-40%; therefore, the fertilizer is an organic green environment-friendly liquid fertilizer.

Description

technical field [0001] The invention relates to the treatment and application technology of industrial alcohol waste liquid, molasses waste liquid and starch fermentation waste liquid. Background technique [0002] Molasses alcohol waste liquid refers to the waste water discharged after the fermented mash is distilled out of alcohol in the alcohol primary distillation tower after fermentation with molasses as raw material. About 15-20 tons of waste water is discharged for every 1 ton of alcohol produced. At present, my country discharges more than 6 million tons of such waste water annually. The molasses alcohol waste liquid has the following characteristics: the CODcr value of the waste water is 8~50×10 4 mg / L, BOD5 value is 4~6×10 4 mg / L, good biodegradability, high-concentration organic wastewater; solid content up to 10% to 20%, capable of drying and recycling, but high viscosity and low added value; contains a lot of organic matter, protein, vitamins, N, P, K, etc. ,...

AI Technical Summary

Problems solved by technology

The molasses alcohol waste liquid has the following characteristics: the CODcr value of the waste water is 8~50×10 4 mg / L, BOD5 value is 4~6×10 4 mg / L, good biodegradability, high-concentration organic wastewater; solid content up to 10% to 20%, capable of drying and recycling, but high viscosity and low added value; contains a lot of organic matter, protein, vitamins, N, P, K, etc. , non-toxic and harmless; pH value 5-6.5, containing inorganic acid and organic acid, strong corrosiveness; high chroma, containing melanoid, difficult to remove physically and chemically

These industrial waste liquids cannot be discharged directly without treatment, otherwise they will seriously affect the environment.