A kind of acid washing phosphorization waste water treatment process
Technical field
The present invention relates to a kind of acid washing phosphorization waste water treatment process.
Background technology
Phosphorating treatment is a kind of chemical reprocessing technique to metal material and its article surface progress.Through parkerized
Metal material and its product surface form dipped type phosphate film layer, and the film layer and metallic matrix have good binding ability, resistance to
Mill property and the adhesive ability to coating, therefore, the industry such as machinery, steel is all using phosphorization treatment technology come production machinery part
Overcoat.Phosphorization treatment process generally comprise alkali cleaning oil removing, hot water rinsing, cold rinse, acid pickling and rust removing, secondary cold rinse and
Several steps such as phosphatization.It is main to produce alkali cleaning emulsifying waste water, poaching wastewater, pickle liquor and etching waste liquor etc. during it
Various wastewater.
In phosphorized waste water in addition to containing substantial amounts of phosphate, zinc ion, acid-base material and organic matter, according to production technology not
Together, it is sometimes also multiple containing the pollutant such as heavy metal and surfactant, compositions such as a certain amount of nickel ion, copper ion or lead ions
Miscellaneous, intractability is larger.Phosphate discharge capacity is big, mainly exists in the form of the inorganic salts such as zinc dihydrogen phosphate, in addition with
The pollutants such as COD, petroleum-type and suspension.
Currently the main flow handling process in engineering practice of phosphorized waste water is:Chemical precipitation/coagulation air-float/sand filtration/work
Property charcoal absorption, complex process, dosage is more, and operating cost is high.
On the other hand, the country is primarily present following patent document at present:
Patent publication No.:CN104671493A, a kind of acid washing phosphorization waste water medicament neutralisation treatment technique is disclosed, is by mixing
Close reaction tank, sedimentation basin, mechanical dehydration or sludge drying bed, detection means composition.The invention has the advantages that hybrid reaction
Pond mixes waste water and nertralizer, is fully reacted.Reacted insoluble matter precipitates in sedimentation basin.Sludge under precipitation enters
Row mechanical dehydration or sludge drying.Device detects whether after reaching discharge standard water after processing after testing, discharges or locates again
Reason.However, the patent processing method is excessively simple, neutralisation treatment, place are carried out to acid washing phosphorization waste water merely by nertralizer
It is not very obvious to manage effect.
The content of the invention
To solve above-mentioned problem, it is an object of the invention to provide a kind of acid washing phosphorization waste water treatment process, institute
State technique and set up anaerobic pond and Aerobic Pond, the phosphorus containg substances and organic matter in acid washing phosphorization waste water, processing effect are handled using A/O methods
Fruit is good, and cost is low, environmentally friendly.
To reach above-mentioned purpose, the technical scheme is that:
A kind of acid washing phosphorization waste water treatment process, comprises the following steps:
1) acid washing phosphorization waste water is tentatively filtered off except useless impurities in water through grid;
2) the acid washing phosphorization waste water after preliminary filtering is sent into homogeneous regulating reservoir, acid washing phosphorization waste water is obtained homogeneous;
3) the acid washing phosphorization waste water after homogenization is sent into by hybrid reaction clarifier by elevator pump, and passes through dosing pump
Coagulant is added into the hybrid reaction clarifier so that the acid washing phosphorization waste water is consolidated in hybrid reaction clarifier
Liquid separates, and adds alkali aluminium, polyacrylamide removal phosphate anion, heavy metal ion and COD;
4) waste water that blended reaction clarifier is isolated delivers to reactor for hydrolysis and acidification through water pump and carries out acidification;
5) waste water after acidification is sent into anaerobic pond, the denitrifying bacterium in anaerobic pond carries out dephosphorization treatment to waste water;
6) waste water after anaerobic pond is handled is sent into Aerobic Pond, in Aerobic Pond in the presence of organic matter degradation bacteria, drop
Solve the organic matter in waste water;
7) waste water after Aerobic Pond processing enters flotation tank, removes the grease in waste water, reduces COD;
8) waste water after flotation tank is handled is sent into mechanical filter unit, and clear water storage is sent into after removing the suspension in water removal
Pond.
Further, residence time of the acid washing phosphorization waste water in homogeneous regulating reservoir is 2 ~ 3h in step 2).
In addition, coagulant described in step 3) is in aluminum sulfate, alchlor, ferrous sulfate, calcium hydroxide and magnesium carbonate
One kind.
Separately have, coagulant described in step 3) is calcium hydroxide.
Again, the residence time in hybrid reaction clarifier of acid washing phosphorization waste water described in step 3) is 0.5 ~ 1h.
Further, pH value is 10 ~ 11 in step 3).
And sanitary sewage residence time in Aerobic Pond is 0.3 ~ 0.5h in step 6).
In addition, DO is 2 ~ 4mg/L in Aerobic Pond described in step 6).
Again, YDT type elastic solid fillers are provided with Aerobic Pond described in step 6), adhered on YDT type elastic solid fillers
By microorganism, one layer of microorganism film layer is formed.
The beneficial effects of the present invention are:
The technique uses A/O method handling process, combine anaerobism, it is aerobic the advantages of, effectively acid washing phosphorization can be given up
Phosphorus and organic matter in water are explained and removed, and the water outlet pH value after the completion of processing is 6 ~ 8, meets discharging standards, goes out
COD in watercrContent≤35mg/L, hence it is evident that less than the 100mg/L in national standard, phosphorus content is 0.4 ~ 0.5mg/L in water outlet, place
Reason effect is good, and cost is low, environmentally friendly.
Embodiment
Following examples are used to illustrate the present invention, but can not be used for limiting the scope of the present invention.The reality used in embodiment
The condition of applying can be for further adjustments according to the condition of producer, and unaccounted implementation condition is usually conventional laboratory conditions.
A kind of acid washing phosphorization waste water treatment process provided by the present invention, comprises the following steps:
1) acid washing phosphorization waste water is tentatively filtered off except useless impurities in water through grid;
2) the acid washing phosphorization waste water after preliminary filtering is sent into homogeneous regulating reservoir, acid washing phosphorization waste water is obtained homogeneous;
3) the acid washing phosphorization waste water after homogenization is sent into by hybrid reaction clarifier by elevator pump, and passes through dosing pump
Coagulant is added into the hybrid reaction clarifier so that the acid washing phosphorization waste water is consolidated in hybrid reaction clarifier
Liquid separates, and adds alkali aluminium, polyacrylamide removal phosphate anion, heavy metal ion and COD;
4) waste water that blended reaction clarifier is isolated delivers to reactor for hydrolysis and acidification through water pump and carries out acidification;
5) waste water after acidification is sent into anaerobic pond, the denitrifying bacterium in anaerobic pond carries out dephosphorization treatment to waste water;
6) waste water after anaerobic pond is handled is sent into Aerobic Pond, in Aerobic Pond in the presence of organic matter degradation bacteria, drop
Solve the organic matter in waste water;
7) waste water after Aerobic Pond processing enters flotation tank, removes the grease in waste water, reduces COD;
8) waste water after flotation tank is handled is sent into mechanical filter unit, and clear water storage is sent into after removing the suspension in water removal
Pond.
Further, residence time of the acid washing phosphorization waste water in homogeneous regulating reservoir is 2 ~ 3h in step 2).
In addition, coagulant described in step 3) is in aluminum sulfate, alchlor, ferrous sulfate, calcium hydroxide and magnesium carbonate
One kind.
Separately have, coagulant described in step 3) is calcium hydroxide.
Again, the residence time in hybrid reaction clarifier of acid washing phosphorization waste water described in step 3) is 0.5 ~ 1h.
Further, pH value is 10 ~ 11 in step 3).
And sanitary sewage residence time in Aerobic Pond is 0.3 ~ 0.5h in step 6).
In addition, DO is 2 ~ 4mg/L in Aerobic Pond described in step 6).
Again, YDT type elastic solid fillers are provided with Aerobic Pond described in step 6), adhered on YDT type elastic solid fillers
By microorganism, one layer of microorganism film layer is formed.
A kind of acid washing phosphorization waste water treatment process provided by the present invention, using A/O method handling process, combine anaerobism,
The advantages of aerobic, effectively the phosphorus in acid washing phosphorization waste water and organic matter can be explained and removed, going out after the completion of processing
Water pH value is 6 ~ 8, meets discharging standards, COD in water outletcrContent≤35mg/L, hence it is evident that less than in national standard
100mg/L, phosphorus content is 0.4 ~ 0.5mg/L in water outlet, and high treating effect, cost is low, environmentally friendly.
It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted.Although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the technology of invention
Scheme is modified or equivalent substitution, and without departing from the scope of technical solution of the present invention, it all should cover the power in the present invention
In sharp claimed range.