Bio-augmentation treatment system for coking wastewater

Abstract

The invention discloses a bio-augmentation treatment system for coking wastewater, belonging to the field of water treatment. The bio-augmentation treatment system comprises a hypoxia pool, a bio-augmentation aerobic pool and a secondary sedimentation pool which are connected in sequence, wherein the water inlet of the hypoxia pool is used as the water inlet of the entire bio-augmentation treatment system for the coking wastewater, the hypoxia tank is connected with the bio-augmentation aerobic tank, the water outlet of the bio-augmentation aerobic tank is connected with a secondary sedimentation pool, and the water outlet of the secondary sedimentation pool is used as the water outlet of the entire bio-augmentation treatment system for the coking wastewater. Fillers fixed with efficient bacteria are added into the bio-augmentation aerobic pool so as to improve a degradation effect, and screen cloth, an automatic filler fishing-out device and an enriching and culturing tank for superior degraded bacteria in the coking wastewater are arranged on the water outlet end of the bio-augmentation aerobic pool so as to increase the utilization rate and improve the bioactivity of the efficient bacteria. The treatment system can overcome the defects that the traditional A / O (Anoxic / Oxic) process has the treatment effect greatly affected by water quality and the effluent quality incapable of reaching a standard stably, and ensures that the effluent of the A / O treatment process for the coking wastewater reaches the standard stably.

Description

technical field [0001] The invention relates to a coking wastewater treatment technology, in particular to a coking wastewater biointensified treatment system. Background technique [0002] The discharge of coking wastewater has a great impact on the environment. The specific processes used in coking are different, and the quality of wastewater is also different. The quality of wastewater discharged from the same process at different times also varies greatly. The overall performance is that there are many toxic substances and biological inhibitors in wastewater, and contain High concentrations of ammonia nitrogen, phenols, and cyanides belong to high-concentration, refractory, toxic and harmful organic wastewater. [0003] At present, the treatment of coking wastewater mainly includes pretreatments such as ammonia distillation, oil removal and phenol extraction to improve the biodegradability of coking wastewater. After pretreatment of coking wastewater, many enterprises us...

AI Technical Summary

Problems solved by technology

The energy consumption is high during operation and the treatment facilities occupy a large area, but there are still some difficulties in meeting the three indicators of COD, ammonia nitrogen and chroma in the effluent stably.

According to the statistical results, currently 80% of the coking waste water ammonia nitrogen and COD discharged by the enterprises are not up to the standard

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