A kind of dnt production wastewater composite treatment system and its treatment method
A production wastewater and composite treatment technology, applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex treatment process, high treatment cost, poor treatment effect, etc., to achieve Good treatment effect, reduced operating costs, and improved biodegradability
Active Publication Date: 2017-03-01
CHINA NORTH ENERGY CONSERVATION & ENVIRONMENT PROTECTION
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[0007] The purpose of the present invention is to provide a complex treatment system for DNT production wastewater, using electrochemical +Composite process of anaerobic + contact oxidation to treat DNT production wastewater, with good treatment effect, low operating cost, simple operation and no secondary pollution
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[0034] Taking the DNT production wastewater discharged from a factory as the treatment object, its parameters are: COD=3000±300mg / L, DNT=300~400mg / L, BOD=27~48mg / L, B / C=0.09~0.12, pH=7.6~9.5.
[0035] Adopt device and method of the present invention to carry out compound treatment to above-mentioned DNT production waste water; Concrete treatment process is as follows:
[0036] 1) Discharge the DNT wastewater into the adjustment tank through the water inlet of the adjustment tank, set the pH adjustment range of the pH real-time monitoring device in the adjustment tank to 3 to 4, when the DNT wastewater in the adjustment tank is outside the preset pH adjustment range, The pH real-time monitoring device controls the acid-base regulator feeding device to release the acid-base regulator until the pH of the DNT wastewater reaches the preset pH adjustment range, the acid-base regulator feeding device stops feeding, and aerates and stirs for 10 minutes; The DNT wastewater after pH ad...
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Abstract
The invention relates to a composite treatment system and a treatment method for DNT production waste water, and belongs to the field of waste water treatment. The objective of the invention is to overcome disadvantages comprising complex treatment process, high treatment cost, poor treatment effect, easy formation of secondary pollution, and the like, of traditional DNT production waste water treatment. The system comprises a regulating tank, an electrochemical tank, a neutralization and flocculation tank, a sedimentation tank 1, an anaerobic tank, an aerobic tank, a sedimentation tank 2, a sand filtering tank, and an activated-carbon filter. According to the invention, physicochemical technology and biochemical technology are combined, waste water biodegradability is increased by an electrochemical treatment unit, then most pollutant is removed by a biochemical treatment unit, finally an activated-carbon adsorption technology is used for checking, thereby assuring that water outlet discharged reaches standards. The composite treatment system and the treatment method have advantages of low technology cost and good treatment effect. COD of the waste water after treatment is decreased to be less than 80 mg / L, and the concentration of DNT in the waste water after treatment is decreased to be less than 3 mg / L.
Description
technical field [0001] The invention relates to a DNT production wastewater composite treatment system and a treatment method thereof, belonging to the field of wastewater treatment. Background technique [0002] Dinitrotoluene (DNT for short) is an important chemical intermediate widely used in medicine, dyes, explosives and polymer materials industries. A large amount of organic wastewater will be produced during the synthesis and purification of dinitrotoluene. The waste water is alkaline, with high pollutant content and complex composition, which is very harmful to the environment. Nitro compounds such as DNT in wastewater are stable and biologically toxic, and can hardly be degraded by simple biochemical treatment processes. Therefore, DNT production wastewater must be pretreated to reduce its biological toxicity and improve its biodegradability. [0003] At present, domestic DNT production wastewater treatment processes mainly include incineration, activated carbon ...
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IPC IPC(8): C02F9/14C02F103/36
Inventor 林毅辛立平姜鑫孟庆海李相龙赵晨王华马迁谷振华袁从艳林春迟正平张振中姜振明达识栋陈志权郑颖娟苏宏平
Owner CHINA NORTH ENERGY CONSERVATION & ENVIRONMENT PROTECTION