Wet-oxidation treatment method of wastewater generated in wood cooking processing process
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A technology of wet oxidation and treatment method, which is applied in the process of wastewater treatment, oxidized water/sewage treatment, water/sewage treatment, etc. The effects of short working hours, small footprint and low operating costs for wastewater treatment
Inactive Publication Date: 2016-10-26
SHANGHAI INST OF TECH
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[0003] The adverse effects of the above treatment methods are: coagulation or Fenton oxidation treatment process, COD Cr The removal rate is not high, and it will bring solid waste that is difficult to treat. If the coagulation treatment process is followed by the SBR sewage treatment method to treat wood cooking wastewater, although the wastewater can meet the discharge standards, there are relatively complicated treatment processes and waste water. Disadvantages such as long treatment hours, large area of treatment equipment, coagulation solid waste residue and biochemical sludge are difficult to digest
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Embodiment 1
[0031] Put 240 milliliters of wood cooking waste water in an autoclave with a volume of 500 milliliters, a pressure resistance of 35 MPa, and a propulsion stirring paddle, then add 1.2 grams of catalyst, close the lid of the kettle, and then feed oxygen to an oxygen partial pressure of 3.5 MPa, confirm After the system has no leaks, start stirring to 400 rpm; the linear speed is 0.84 m / s, heat the autoclave to 240 ° C, keep it warm for 45 minutes, then cool to room temperature and discharge the material, filter the catalyst, and the treated wastewater is pure and transparent. Use (GB11914 -89) Standard test COD Cr value, COD Cr The value is 97mg / L, reaching the national first-level emission standard.
Embodiment 2
[0033] Put 240 milliliters of wood cooking wastewater into an autoclave with a volume of 500 milliliters, a pressure resistance of 35 MPa, and a propulsive stirring paddle, then add 1.2 grams of catalyst, close the lid of the kettle, and then feed oxygen to an oxygen partial pressure of 3.0 MPa to confirm After the system has no leakage, start stirring to 400 rpm; the linear speed is 0.84 m / s, heat the autoclave to 250°C, keep it warm for 35 minutes, then cool to room temperature and discharge the material, filter the catalyst, the treated wastewater is pure and transparent, use (GB11914 -89) Standard test COD Cr value, COD Cr The value is 92mg / L, reaching the national first-level emission standard.
Embodiment 3
[0035] Put 240 milliliters of wood cooking wastewater into an autoclave with a volume of 500 milliliters, a pressure resistance of 35 MPa, and a propulsive stirring paddle, then add 1.2 grams of catalyst, close the lid of the kettle, and then feed oxygen to an oxygen partial pressure of 3.2 MPa to confirm After the system has no leaks, start stirring to 400 rpm; the linear speed is 0.84 m / s, heat the autoclave to 250°C, keep it warm for 40 minutes, then cool to room temperature and discharge the material, filter the catalyst, and the treated wastewater is pure and transparent. Use (GB11914 -89) Standard test COD Cr value, COD Cr The value is 89mg / L, reaching the national first-level emission standard.
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Abstract
The invention relates to a wet-oxidation treatment method of wastewater generated in the wood cooking processing process. The wet-oxidation treatment method includes the following steps that 1, the wastewater generated in the wood cooking processing process is placed into a high-pressure reaction kettle; 2, a certain quantity of catalysts is fed into the high-pressure reaction kettle, and a kettle cover is closed; 3, oxygen is led into the high-pressure reaction kettle, and stirring is started after it is confirmed that the system is free of leakage; 4, the high-pressure reaction kettle is heated to be at the reaction temperature, the reaction temperature is kept for a certain period of time, then the high-pressure reaction kettle is cooled to be at the normal temperature after the reaction is complete, and discharging is carried out; 5, the catalysts are filtered out, it can be seen that the treated wastewater is pure and transparent, and the value Cr of the chemical oxygen demand (COD) of the wastewater is tested. According to the wet-oxidation treatment method, the technology is simple, the running cost is low, the wastewater treatment labor hours are short, the occupied area of treatment equipment is small, the removing rate of the COD Cr of the wastewater reaches 95% or above, the value Cr of the COD of the wastewater is smaller than 100 mg/L and meets the national first-grade draining requirement, the obtained water can serve as production water to be used indiscriminately or be directly drained, and secondary pollution is avoided.
Description
[technical field] [0001] The invention relates to the technical field of wood cooking wastewater treatment, in particular to a method for wet oxidation treatment of wastewater generated in the wood cooking process. [Background technique] [0002] In recent years, with the continuous development of the wood processing industry, wood processing wastewater has become one of the main sources of industrial wastewater pollution in my country. Among them, the cooking wastewater generated in the cooking process section of the wood processing process is the main source of wood processing wastewater. Cooking wastewater belongs to organic wastewater, which has a large amount of water, high chroma, high lignin content, poor biochemical properties of wastewater, and direct discharge into water will cause serious pollution to water bodies. At present, there is no mature and reliable method for the treatment of wood cooking wastewater at home and abroad. The general industrial treatment m...
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Application Information
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