System and method for advanced treatment of coking wastewater
A technology for advanced treatment and coking wastewater, used in water/sewage treatment, natural water treatment, chemical instruments and methods, etc., can solve the problem of ineffective coking wastewater treatment, improve the biological denitrification effect and treatment efficiency, strengthen the Electric neutralization ability, the effect of improving the flocculation effect
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Embodiment 1
[0036] Please refer to figure 1 and figure 2 , the advanced treatment system of coking wastewater in this embodiment, which includes: an initial pretreatment unit, an enhanced pretreatment unit, a biological denitrification unit, and a biological desulfurization unit connected in sequence, and an arrangement between the pretreatment unit and the enhanced pretreatment unit With dissolved air flotation device;
[0037] The initial pretreatment unit includes: a degreasing pool and a regulating pool connected in sequence.
[0038] The enhanced preprocessing unit includes a first AS enhanced pool and a second AS enhanced pool connected in sequence. The sludge in the second AS strengthening tank is partially returned to the first AS strengthening tank.
[0039] The biological denitrification unit includes: the facultative A-section pool, the aerobic O-section pool, the MBR membrane biological reaction pool and the coagulation pool connected in sequence.
[0040]The biological d...
Embodiment 2
[0042] The advanced treatment method of coking wastewater of the present embodiment adopts the above-mentioned advanced treatment system of coking wastewater, comprising the following steps:
[0043] (1) The coking wastewater is passed into the degreasing tank to remove the oil and suspended solids in the wastewater, and then passed into the regulating tank through aeration and stirring for homogenization; among them, the main indicators of the coking wastewater are as follows: COD: 5000mg / L; SS: 150mg / L; pH: 6; Volatile phenols: 1000mg / L; Ammonia nitrogen: 200mg / L; Sulfide: 20mg / L; Cyanide: 10mg / L.
[0044] (2) Under the action of the dissolved air flotation device, the wastewater treated by the primary pretreatment unit is sequentially transported to the first AS intensification pool and the second AS intensification pool for treatment; the sludge generated in the second AS intensification pool is partially returned to The first AS strengthening pool;
[0045] (3) Pass the...
Embodiment 3
[0054] The advanced treatment method of coking wastewater of the present embodiment adopts the above-mentioned advanced treatment system of coking wastewater, comprising the following steps:
[0055] (1) The coking wastewater is passed into the degreasing tank to remove the oil and suspended solids in the wastewater, and then passed into the regulating tank through aeration and stirring for homogenization; among them, the main indicators of the coking wastewater are as follows: COD: 7000mg / L; SS: 350mg / L; pH: 7; Volatile phenols: 2000mg / L; Ammonia nitrogen: 350mg / L; Sulfide: 35mg / L; Cyanide: 20mg / L.
[0056] (2) Under the action of the dissolved air flotation device, the wastewater treated by the primary pretreatment unit is sequentially transported to the first AS intensification pool and the second AS intensification pool for treatment; the sludge generated in the second AS intensification pool is partially returned to The first AS strengthening pool;
[0057] (3) Pass the...
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