Treatment process of salt-containing organic wastewater

Abstract

The invention discloses a treatment process of salt-containing organic wastewater. The treatment process comprises the following steps: firstly, adjusting the pH value of the wastewater to 6-10 in a pretreatment system; injecting the wastewater into a nanofiltration membrane concentration system, and concentrating the wastewater by selectively intercepting organic molecules and inorganic salt; andinjecting a concentrated solution intercepted by the nanofiltration membrane concentration system into drying equipment and concentrating the concentrated solution into blocks, sheets or powder for discharge. According to the invention, organic matters and inorganic salts in wastewater can be simultaneously treated, the process is simple, an evaporative crystallization procedure is eliminated inthe process, organic matters in the wastewater cannot be accumulated or generate mother liquor, the organic matters are thoroughly changed into dry materials through the drying equipment, the outsourcing cost is saved, the organic matters and salt in the wastewater can be selectively intercepted, the drying load is greatly reduced, the energy consumption is low, no pollution is caused to the environment, and the treatment cost of the salt-containing organic wastewater is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment process for salt-containing organic wastewater. Background technique [0002] At present, industries such as chemical production, electronic and electrical component manufacturing, and surface treatment produce a large amount of salt-containing organic wastewater, which has complex components and is difficult to treat. [0003] The traditional treatment process is mainly divided into two categories, one such as the patent document with the publication number CN109205960A, the waste water is first degraded by oxidation or biochemical method, and the salty waste water produced is then treated by membrane concentration, and the clear water generated during the concentration process is discharged, concentrated The brine enters the evaporator for crystallization treatment, and the condensed water generated during the evaporation and crystallization process ret...

AI Technical Summary

Problems solved by technology

[0008] 1) In the existing saline organic wastewater treatment, salt and organic matter are treated separately, and the process is cumbersome;

[0009] 2) The existing salt-containing organic wastewater treatment process cannot completely degrade and separate organic matter. Long-term operation will produce high-concentration mother liquor at the evaporation end, and the outsourcing cost is high;

[0010] 3) The existing treatment process of salt-containing organic wastewater is dedicated to concentrating all the salt and then evaporating it, resulting in high energy consumption of the system