Detoxification method of iminodiacetonitrile waste residue, and biotechnological method for producing fertilizer from detoxified iminodiacetonitrile waste residue

Abstract

The invention discloses a detoxification method of iminodiacetonitrile waste residues, and a biotechnological method for producing fertilizers from detoxified iminodiacetonitrile waste residues. According to the invention, a pre-treating process is carried out upon iminodiacetonitrile waste residues which are generated during processes for producing cyanide fine chemical products through natural gas ammoxidation, such that a waste residue base-material for piling fermentation is prepared; the waste residue base-material for piling fermentation is well-mixed with a biomass base-material according to a mass ratio of 1:2-5, such that a fermentation base-material is prepared; an orient-acclimated fermentation microbe inoculation bacterium source is well-mixed with the fermentation base-material according to a mass ratio of 1:10-15, and the mixture is fermented for 15 to 45 days under a temperature of 15 to 85 DEG C and a pH value of 5.0 to 7.5, such that a raw material for producing various organic fertilizers is prepared; the raw material is blended with nutrients of N, P and K; the resulting material is processed through fertilizer producing technologies of well-mixing, granulating and drying, such that organic fertilizers are produced. According to the invention, nitrile-removing and detoxifying are carried out through biotechnologies, toxic nitrile compounds in iminodiacetonitrile waste residues can be nuisance free after being treated. During the production of the organic fertilizers, iminodiacetonitrile waste residues are effectively reused as resources.

Description

Technical field: [0001] The invention belongs to the technical field of nitrile compound production, and in particular relates to a method for detoxifying iminodiacetonitrile waste residues associated with the process of producing cyanide series fine chemical products by ammoxidation of natural gas and using it to produce organic fertilizers. Background technique: [0002] At present, in the process of producing cyanide series fine chemical products by ammoxidation of natural gas, the production process of using hydrocyanic acid to prepare hydroxyacetonitrile and then iminodiacetonitrile is accompanied by a certain amount of toxic nitrile-containing waste residue, which generally contains Aliphatic nitrile substances such as iminodiacetonitrile, glycinenitrile, and nitrilotriacetonitrile and their polymers have complex compositions. Since the waste residue is off-line in the iminodiacetonitrile production section, and the content of iminodiacetonitrile is relatively large, t...

AI Technical Summary

Problems solved by technology

Therefore, all cyanide and nitrile compounds containing cyano group (-CN) have a certain degree of toxicity to living systems. The simpler the structure, the stronger the toxicity and the more significant the toxic effect. Sensitive environmentally unfriendly substances

[0015] In addition, in addition to the chemical toxicity of cyano group (-CN), iminodiacetonitrile waste residue is also a highly acidic chemical medium with a high content of ammonia nitrogen.

In principle, waste residues with these characteristics are generally not conducive to biochemical treatment, because the acidic environment is not conducive to the growth of microorganisms, and ammoniacal nitrogen (NH 3 ) release is also toxic to microbial cells

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