Three-phase biological fluidized bed A/O/O process for treating coking wastewater

Abstract

The invention provides a three-phase biological fluidized bed A/O/O (Anaerobic/Oxic/Oxic) process for treating coking wastewater. According to the coking wastewater flow, the three-phase biological fluidized bed A/O/O process comprises a grease removal tank, a deamination tower, a catchment regulating tank, a primary coagulative precipitation tank, an anaerobic fluidized bed, a primary oxic three-phase biological fluidized bed, a secondary oxic three-phase biological fluidized bed, a biological filter and a secondary coagulative precipitation tank, wherein the primary oxic three-phase biological fluidized bed is internally filled with novel large-pore biological carrier particles and mainly used for removing COD (Chemical Oxygen Demand); the secondary oxic three-phase biological fluidized bed is filled with a large-specific surface area biological carrier and used for further degrading organic matters in water out of the primary oxic three-phase biological fluidized bed; granular biological fillers different in granularity are filled in the biological filter from top to bottom so that residual organic matters in the wastewater can be quickly adsorbed and degraded; the coagulative precipitation tanks are used for further separating out fine suspended solids and dropping biological sludge in water out of the biological filter. The process is capable of saving the carbon source, reducing the oxygen demand, reducing the alkali consumption and also reducing the amount of sludge generated.

Description

technical field [0001] The invention relates to coking wastewater treatment, in particular to a three-phase biological fluidized bed A / O / 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. There are also many treatment processes for coking wastewater. However, the old wastewater treatment technology is backward and the treatment effect is poor. It is difficult to effectively eliminate the oily components and ammonia nitrogen in the wastewater. Physicochemical and biological processes pr...

AI Technical Summary

Problems solved by technology

There are also many treatment processes for coking wastewater. However, the old wastewater treatment technology is backward and the treatment effect is poor. It is difficult to effectively eliminate the oily components and ammonia nitrogen in the wastewater. Physicochemical and biological processes produce a large amount of sludge, and the operation of equipment higher cost

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