Wastewater preprocessing catalytic reduction reactor and wastewater preprocessing system and technology thereof

Abstract

The invention discloses a wastewater preprocessing catalytic reduction reactor and a wastewater preprocessing system and technology thereof. The reactor comprises a reactor body, a rotary-cut mixed flow aerator, a rolled iron-aluminum mixture, and a catalyst framework. The reactor body comprises a reaction area and a sludge precipitation area. The sludge precipitation area is arranged on the bottom of the reactor body. The lower part of the reaction area is provided with a raw water inlet. The upper part of the reaction area is provided with a water outlet. The catalyst framework is arranged in the reaction area. The rolled iron-aluminum mixture is arranged in the catalyst framework. The rotary-cut mixed flow aerator is arranged on the bottom of the reaction area. The air inlet pipe of therotary-cut mixed flow aerator penetrates the catalyst framework and is connected to an air supply device. The bottom of the sludge precipitation area is provided with a mud discharge pipe. The provided catalytic reduction reactor can still convert degradation-resistant, macromolecular, harmful, and toxic substances in wastewater into easily degradable, micromolecular, nontoxic, and harmless substances even if the pH value is high; the heavy metal ions are reduced and removed, and the wastewater can be better biochemically processed.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a wastewater pretreatment catalytic reduction reactor, a wastewater pretreatment system and a process thereof. Background technique [0002] Industrial wastewater containing refractory and toxic organic matter (such as printing and dyeing wastewater, dye wastewater, electroplating wastewater, etc.) and landfill leachate are often treated with iron-carbon internal electrolysis as a biological pretreatment process. This technology integrates redox, flocculation adsorption, catalysis, complexation and electrodeposition, etc. It can not only transform toxic and harmful substances in wastewater, effectively improve the biodegradability of wastewater, but also play a role in chemical phosphorus removal and enhanced biological nitrogen removal. Effect. [0003] However, the iron-carbon method also has defects such as large acid consumption, large iron consumpti...

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Problems solved by technology

[0003] However, the iron-carbon method also has defects such as large acid consumption, large iron consumption, large sludge production, and easy hardening of the reactor.

In response to these defects, some people proposed to use the iron-copper method (that is, copper replaces carbon as a catalyst), which has the advantages of reducing the consumption of acid and iron, greatly reducing the amount of sludge produced compared with the iron-carbon method, and greatly reducing the degree of compaction, but there are Copper cannot be recycled

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