Sludge reduction treatment system based on ozone micro-nano bubbles and method thereof

Abstract

The invention relates to a sludge reduction treatment system based on ozone micro-nano bubbles and a method thereof. The treatment system comprises a water tank, an ozone generator, a micro-nano bubble generator, a sludge reactor, a tail gas absorption tank and a sludge collection tank, the water tank is connected with the micro-nano bubble generator through a liquid conveying pipe, the ozone generator is connected with the micro-nano bubble generator, a discharging nozzle of the micro-nano bubble generator is connected with the sludge reactor, a reaction gas outlet in the upper portion of thesludge reactor is connected with the tail gas absorption tank, and a sludge outlet in the bottom is connected with the sludge collection tank. The treatment method comprises the following steps: preparing an ozone micro-nano bubble water system; injecting ozone micro-nano bubble water into the sludge reactor at a high speed; preparing a solution containing Fe <2+> or Mn<2+>, and introducing the solution into the sludge reactor for sludge oxidation treatment; and introducing tail gas into the tail gas absorption tank for tail gas absorption. According to the method, the utilization rate of theozone oxidant can be increased, the sludge reduction treatment efficiency is improved, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, in particular to a sludge reduction treatment system and method based on ozone micro-nano bubbles. Background technique [0002] The treatment of activated sludge has always been a difficult problem in the field of waste treatment. The disposal cost of excess sludge has accounted for 25%-60% of the operating cost of sewage treatment plants. Therefore, the realization of sludge reduction is the main research focus at home and abroad. . Sludge has the characteristics of high water content, large volume and high treatment cost. The types of activated sludge mainly include the following: primary sedimentation tank sludge, excess sludge, return sludge, etc. As countries around the world continue to introduce stricter environmental protection policies and regulations, the cost-effective activated sludge treatment process urgently needs to be upgraded. [0003] The technical principles of slu...

AI Technical Summary

Problems solved by technology

Fenton oxidation technology has the advantages of rapidity, economy, and environmental friendliness, but the shortcomings of incomplete mineralization of organic matter restrict its wide application

o 3 is a common strong oxidizing agent, but O 3 The direct oxidation reaction has high selectivity and slow reaction rate, and its utilization rate is not high

And since O 3 The indirect oxidation is to use the characteristics of free radicals with strong oxidizing ability generated by the decomposition of ozone in water to decompose organic matter. Indirect oxidation has the characteristics of fast reaction rate and low selectivity.

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