Treatment of various types of wastewater

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Treatment of various types of wastewater; treatment of organic wastewater containing N, S, and halogen elements. Substances included in such wastewater are: pyridine, quinoline, methylpyridine, amino acids, amides, dimethylformamide, carbon disulfide, thiol compounds, alkyl sulfides, thiourea, thioamides, thiophene, dimethyl sulfoxide, chloroform, carbon tetrachloride, vinyl chloride derivatives, chlorobenzene derivatives, acyl halides, as well as dyes, pesticides, pigments, and their intermediates that contain N, S, and halogens. Its combustible materials are treated by incineration. But measures must be taken to remove the harmful gases produced by combustion (such as SO2, HCl, NO2, etc.). Attention should be paid to substances such as polychlorinated biphenyls, which are difficult to burn and are therefore discharged directly in some cases. Substances that are difficult to burn and waste liquids at low concentrations are treated using solvent extraction, adsorption, and hydrolysis methods. However, substances such as amino acids that are easily decomposed by microorganisms can be discharged after being diluted with water. Treatment of organic waste liquids containing acids, bases, oxidizing agents, reducing agents, and inorganic salts. Such waste liquids include organic waste liquids that contain acids such as sulfuric acid, hydrochloric acid, and nitric acid, as well as bases such as sodium hydroxide, sodium carbonate, and ammonia; in addition, they include oxidizing agents such as hydrogen peroxide and peroxides, as well as reducing agents such as sulfides and hydrazine. First, according to the treatment methods for inorganic waste liquids, they are neutralized separately. Then, if the concentration of organic substances is high, it is treated by incineration (the residues are properly stored). When it is possible to separate the organic layer from the aqueous layer, the organic layer is incinerated, while the aqueous layer or waste liquids with low concentrations are treated using adsorption, solvent extraction, or oxidative decomposition methods. However, its substances that are easily decomposed by microorganisms can be discharged after being diluted with water. Such waste liquids include those containing benzene, hexane, xylene, toluene, kerosene, light oil, heavy oil, lubricating oils, cutting oils, machine oils, animal and vegetable fats, as well as liquid and solid fatty acids. Its combustible materials are treated by incineration. For substances that are difficult to burn and waste liquids at low concentrations, solvent extraction or adsorption methods are used for treatment. For waste liquids containing oil and the like, as well as those containing heavy metals, the combustion residues must be stored properly. Treatment of waste liquids containing petroleum and animal and plant oils. Such waste liquids include those containing benzene, hexane, xylene, toluene, kerosene, light oil, heavy oil, lubricating oils, cutting oils, machine oils, animal and plant oils, as well as liquid and solid fatty acids. Its combustible materials are treated by incineration. For substances that are difficult to burn and waste liquids at low concentrations, solvent extraction or adsorption methods are used for treatment. For waste liquids containing oil and the like, as well as those containing heavy metals, the combustion residues must be stored properly. Treatment of waste liquids containing organophosphorus These waste liquids include those containing phosphoric acid, phosphorous acid, thiophosphoric acid, phosphonates, phosphine compounds, as well as phosphorus-based pesticides. Wastewater with high concentrations of it is incinerated (since it contains many substances that are difficult to burn, it can be mixed with combustible materials for incineration). For waste liquids with low concentrations, after hydrolysis or solvent extraction, they are treated using adsorption. Treatment of waste liquids containing phenols: Such waste liquids contain substances such as phenol, cresol, naphthol, etc. Flammable substances with high concentrations can be treated by incineration. Wastewater with low concentrations is treated using adsorption, solvent extraction, or oxidative decomposition methods.