Electrochemical treatment system for printing ink wastewater

Abstract

The invention discloses an electrochemical treatment system for printing ink wastewater. Firstly, a metastable phase in acidified printing ink wastewater is removed through an electronic flocculationtechnology; then a non-active metal oxide composite electrode with a catalytic capability is used as an electrode and the wastewater is catalyzed under the action of an electric field to form intermediate products including hydroxyl free radicals with strong oxidization performance and the like; organic matters in the wastewater are oxidized and processes including chain breaking, breaking and thelike are finished; the COD (Chemical Oxygen Demand) in the wastewater is reduced and the biodegradability of the wastewater is improved. The electrochemical treatment system disclosed by the invention has the characteristics that an oxidant does not need to be added, reaction conditions are moderate, the sludge amount is less, the biochemical performance of output water is good, the operation cost is low, the system is simple, stable and reliable, the automation degree is high and the like.

Description

technical field [0001] The invention belongs to the field of environmental engineering, in particular to an electrochemical treatment system for ink wastewater. Background technique [0002] Ink wastewater mainly comes from PCB production lines, etc. It has the characteristics of high content of organic pollutants, poor biodegradability, heavy metals, and high chroma. The wastewater contains organic solvents such as isopropanol, toluene, and acetone, and contains lead, chromium, and copper. Heavy metals are highly harmful to organisms, and improper treatment systems will seriously pollute the environment. The national "Electroplating Pollutant Discharge Standard" GB21900-2008 stipulates that special protection measures are required to take special protection measures when the land development density is high, the environmental carrying capacity begins to weaken, or the water environment capacity is small, the ecological environment is fragile, and serious water environmental...

AI Technical Summary

Problems solved by technology

However, the Fenton oxidation method needs to add a large amount of chemical agents, such as acid, alkali, ferrous salt, hydrogen peroxide, etc., which is highly dependent on the chemical agent, produces a large amount of sludge, and costs a lot for the treatment system.

With the continuous increase of environmental protection, the prices of various chemical raw materials are constantly rising, and the cost of traditional treatment systems that rely on chemical agents is also getting higher and higher.

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