Comprehensive recycling method and device for high-salt-content amino acid waste water

Abstract

The invention discloses a comprehensive recycling method for high-salt-content amino acid waste water. The method comprises the following steps of: (1) removing impurities; (2) separating organic substances from inorganic substances; (3) recycling organic substances and extracting salt; and (4) circularly treating. In the comprehensive recycling method and the device for high-salt-content amino acid waste water, amino acid and inorganic salt are separated by using a nanofiltration membrane, and are recycled respectively, so that the problem of treatment of organic waste water is solved, operation is convenient, the treatment cost is low, and high yield is achieved with small investment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for comprehensive recovery and treatment of high-salt amino acid wastewater and a treatment device thereof. Background technique [0002] High-salt organic wastewater has always been a difficult problem in wastewater treatment, and it exists widely in industries such as petroleum, chemical industry, food, waste liquid treatment, and intermediates. The usual aerobic anaerobic biochemical treatment cannot be used due to the restriction of bacterial salt tolerance (generally, the salt content needs to be less than 1%). Currently, multiple-effect evaporation treatment is mainly used. [0003] The processing cost of multiple effect evaporation is very high, and the organic matter is difficult to recover. Many organic substances are prone to polymerization at high temperature, resulting in foaming, which leads to abnormal evaporation. The evaporative concentrati...

AI Technical Summary

Problems solved by technology

[0010] It can be known from the above data that amino acids will significantly increase the boiling point of NaCl solution, and the higher the concentration of amino acids, the higher the boiling point of the solution. When the concentration is 40 times, the MVR system with two-stage fans connected in series will make the effective temperature difference only 1°C, heat exchange cannot be performed

At this time, MVR technology can no longer be used for the treatment of wastewater with high solubility of organic matter, and can only be used for evaporation and concentration of wastewater at most.

If the MVR system with three-stage fans in series is used, although the heat exchange is feasible, the energy consumption will be greatly increased, and the equipment investment will be large, which is not economical and applicable.

There is no effective treatment method for this kind of high-salt organic wastewater

Images