A kind of treatment method of high sulfate organic waste water

Abstract

The invention belongs to the field of wastewater treatment, and provides a treatment method of high-sulfate organic wastewater. The treatment method is characterized by being achieved through the following steps: A, cooling crystallization and solid-liquid separation; B, Fenton oxidation; and C, sulfate-resistant biological treatment; and the steps are specified as follows: carrying out cooling crystallization on the organic wastewater containing high-concentration sulfates to form solid and liquid two phases, carrying out solid-liquid separation, carrying out resource utilization on the solid-phase sulfate hydrate crystals, and repeating the cooling crystallization of the water phase until no crystal precipitates; carrying out Fenton oxidation on the sulfate wastewater pretreated by cooling crystallization; and mixing the sulfate wastewater treated by Fenton oxidation with low-concentration domestic sewage according to a certain ratio, and introducing the mixture into a sulfate-resistant SBR (sequencing batch reactor) activated sludge system for biological treatment. By utilizing a multiple-method combined manner, the treatment method provided by the invention has the advantages of economy, high efficiency, flexibility, no secondary pollution, good operability, high adaptability and good prospects for industrial application, and is suitable for the qualified treatment of the high-sulfate organic wastewater.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for high sulfate organic wastewater. Background technique [0002] Food production (syrup, seafood, edible oil, etc.), pharmaceutical, paper, chemical and other industrial production processes will produce high sulfate organic wastewater. In addition to the high concentration of sulfate itself, this kind of wastewater also contains a large amount of toxic and refractory dissolved organic substances, such as benzene ring compounds and hydrocarbons. The discharge of this kind of wastewater will bring serious environmental pollution. [0003] At present, at home and abroad, anaerobic digestion technology is mostly used as the preferred method for treating sulfate organic wastewater. However, the presence of sulfate in wastewater can have a significant impact on anaerobic conditions, and theoretical studies have shown that wastewater COD / SO 4 2- value and influen...

AI Technical Summary

Problems solved by technology

[0005] At present, the relevant desalination methods mainly include evaporation, membrane separation, ion exchange, electrodialysis, etc., which are sometimes difficult to implement due to reasons such as large energy consumption, large equipment investment, and troublesome operation and maintenance.

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