Technology and device for treating coking wastewater through ozone catalytic oxidation combined biofilter

Abstract

The invention discloses a technology and device for treating coking wastewater through an ozone catalytic oxidation combined biofilter. The technology and device are reasonable in design, low in operation cost, solve the problem related to advanced treatment and recycling of coking wastewater, and have a high engineering application value; the technology and device eliminate the unsafe factors for operators and potential risks threatening the health in a heavily polluted environment with coking wastewater, and are simple to operate and low in operation cost; the effluent water quality meets different water use requirements.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a process and a device for treating coking wastewater with an ozone catalytic oxidation combined biological filter. Background technique [0002] Coking wastewater is a recognized industrial wastewater that is difficult to biodegrade. The difficulty lies in the poor biodegradability of the wastewater. In addition to inorganic pollutants such as ammonia, cyanide, and thiocyanate, it also contains impurities such as phenols, naphthalene, pyridine, and quinoline. Cyclic and polycyclic aromatic compounds (PAHS) are difficult to biodegrade. These substances can have long-term effects on the environment, and some of them have been confirmed as carcinogens by research. In addition, high concentrations of ammonia nitrogen, sulfide, and cyanide have strong microbial activity. The inhibitory effect of biological denitrification is not good. At present, different forms of ...

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Problems solved by technology

[0004] At present, the outstanding problems in the advanced treatment and reuse process of coking wastewater are as follows: 1. Advanced treatment of wastewater by chemical agents (such as using strong oxidants such as Fenton's reagent, hypochlorite, ferrate, etc.), this method may It will introduce secondary pollution, and there will be problems such as pipe network and equipment corrosion, which will increase the cost of subsequent desalination. At the same time, the process has problems such as a large amount of chemicals added, and the water quality is affected by flocculation. The water quality is not easy to control; 2. The coking wastewater is used for Wet coke quenching or blast furnace slag flushing, the pollutants in the wastewater are transferred from liquid phase to gas phase, and the operating environment is poor; 3. The whereabouts of concentrated water after advanced treatment of membrane desalination is also an urgent problem to be solved

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