(1) First of all, enterprises are required to adjust and improve production, save water, improve the recycling rate of production water, and carry out separate pre-treatment of all kinds of wastewater to minimize the amount of wastewater end treatment;

(2) In order to transform the existing sewage treatment system, the sewage treatment system adopts the traditional chemical precipitation process, which is technically feasible. However, since the processing system has operated for many years, it is necessary to update the equipment and further improve the automation process.

(3) Newly built electroplating wastewater reuse system. The complete set of electroplating wastewater treatment equipment enables the wastewater that meets the discharge standard to be reused in the electroplating production line after being treated by the recycling system. To solve the problem of water saving in production, the enterprise has taken measures such as adjusting the position of electroplating tank and rinsing tank, adjusting the concentration of plating solution to the most appropriate level, adopting counter current flushing and spray flushing, and directly reusing the treated wastewater to meet the discharge standard. Zero discharge of electroplating wastewater Meet the requirements of pretreatment production unit. Through these measures, the discharge of electroplating wastewater can be reduced by 33%. In addition, through the improvement of the sewage treatment system, the sewage treatment effect can ensure the stability of the standard. Therefore, this paper focuses on the design and implementation of the multiplexing processing system.

1. Neutralization treatment

According to the relevant regulations of desulfurization wastewater treatment in China and the actual power generation situation of coal-fired power plants, the neutralization treatment is carried out by first entering the wastewater into the mixing tank, using limestone or other alkaline chemical reagents to adjust the PH value of desulfurization wastewater, and then carrying out the acid-base neutralization reaction of neutralization treatment to remove relevant ionic substances.

2. Heavy metal separation

During the neutralization treatment of desulfurization wastewater, heavy metal hydroxides will be generated. When the PH value reaches above 9, more insoluble hydroxides will be generated, and insoluble acid substances will be generated.

3. Flocculation treatment

After completing the above two treatment processes, the desulfurization wastewater needs to be flocculated to remove the colloid and other substances in the wastewater.

4. Sedimentation treatment

After the above treatment, the residual wastewater needs to be transferred to other equipment to observe the treatment of wastewater. Generally, the sludge at the bottom is formed by the deposition of flocs. After being filtered by the chamber filter press, the solid-liquid separation of the sediment is carried out.

The advantages of using membrane separation technology to treat electroplating rinse water mainly include the following aspects:

1. Reuse of wastewater and reduce the amount of rinsing water can further treat the wastewater to meet the requirements of "zero discharge", reduce the scale of biochemical and physicochemical treatment, and help enterprises expand production;

2. It can recover useful metal ions, so that enterprises can achieve environmental protection goals and generate benefits at the same time;

3. The effluent quality of the membrane is good and transparent, which is higher than the process water requirements of the electroplating industry;

4. It can be designed according to the treatment requirements, and can continuously expand and increase the treatment capacity and improve the treatment performance through continuous optimization;

5. The system is easy to operate, highly automated, and occupies a small area; 00