Treatment process for coking wastewater
A technology for coking wastewater and treatment process, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problems of affecting the removal effect of activated sludge and destroying the microbial activity of sludge. , to achieve the effect of improving microbial activity and reducing concentration
Inactive Publication Date: 2014-01-08
SUZHOU GUOHUAN ENVIRONMENT DETECTION
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Moreover, cyanide is one of the main pollutants in coking wastewater, but there are few special treatment units for cyanide in the treatment process of coking wastewater. Most of the process design focuses on the removal of COD and the nitrification-reaction of ammonia nitrogen. During the nitrification process, when the concentration of cyanide in coking wastewater is high, it will destroy the microbial activity in the sludge and affect the removal effect of activated sludge on phenol and other organic matter
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[0016] Such as figure 1 As shown, the present invention provides a kind of coking waste water treatment process, and the structure of this process treatment coking waste water comprises according to the flow process of waste water: air flotation separation tank, water collection adjustment tank, anaerobic biological fluidized bed A, aerobic biological flow Fluidized bed O1, hydrolysis fluidized bed H, secondary aerobic fluidized bed O2 and coagulation sedimentation tank.
[0017] Among them, the air flotation separation tank is used to pretreat the foam-prone substances in coking wastewater, collect the foam and carry out catalytic oxidation degradation, create a good environment for the subsequent process of organic matter degradation, and can remove some oil and phenolic substances , to a certain extent improve the biochemical properties of wastewater. The water collection adjustment tank is used to adjust the water volume of coking wastewater to maintain its stability in t...
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The invention provides a treatment process for coking wastewater. A structure used in the process of treating the coking wastewater comprises an air floatation separation tank, a water collection adjusting tank, an anaerobic biological fluidized bed A, a first-stage aerobic biological fluidized bed O1, a hydrolysis fluidized bed H, a second-stage aerobic fluidized bed O2 and a coagulative precipitation tank according to the flow of the wastewater, wherein the air flotation separation tank is used for pretreating easily foaming matters in the coking wastewater; the water collection adjusting tank is used for adjusting the water quantity of the coking wastewater to keep the stability of the coking wastewater in the process flow; the anaerobic biological fluidized bed A is used for converting macromolecular organic matters into degradable small molecular compounds; the first-stage aerobic biological fluidized bed O1 is filled with novel large-pore biological carrier particles which are mainly used for removing CODCr (Chemical Oxygen Demand); the hydrolysis fluidized bed H is used for high-efficiency denitrification; the second-stage aerobic fluidized bed O2 is used for converting NH4<+>-N in the coking wastewater into nitrate nitrogen in large quantity; the coagulative precipitation tank is used for further separating the fine suspensions and the fallen biological sludge carried in the water from the second-stage aerobic fluidized bed O2.
Description
technical field [0001] The invention relates to coking wastewater treatment, in particular to a three-phase biological fluidized bed A / O / H / O process for coking wastewater treatment. Background technique [0002] Coking wastewater is industrial organic wastewater produced during high-temperature carbonization of coal, gas purification, recovery and refining of by-products. It has the characteristics of high pollutant concentration, complex components, and high toxicity. In addition to pollutants, it also contains phenol, oil, amine, naphthalene, pyridine, quinoline, anthracene, etc. and polycyclic aromatic compounds (PAHs), and its water quality components are extremely complex. Moreover, cyanide is one of the main pollutants in coking wastewater, but there are few special treatment units for cyanide in the treatment process of coking wastewater. Most of the process design focuses on the removal of COD and the nitrification-reaction of ammonia nitrogen. During the nitrifi...
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IPC IPC(8): C02F9/14
Inventor 王靓
Owner SUZHOU GUOHUAN ENVIRONMENT DETECTION