Flexible circuit board production wastewater discharge process

Abstract

The invention discloses a flexible circuit board production wastewater discharge process, which includes chemical precipitation, membrane solid-liquid separation, RO membrane reuse, wastewater detection and other steps. The invention involves more than two groups of collecting troughs, treated wastewater is stored in the discharge water collecting troughs and is discharged after it is detected to be up to standard, and if not up to standard, sewage in the tank is lifted to a retreatment system to be treated to meet the standard and is then discharged. The process provided by the invention has the advantages of simple technology, low cost, and stable and up-to-standard water quality.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a process for discharging waste water from flexible circuit board production. Background technique [0002] With the continuous deepening of the national environmental protection concept and the continuous strengthening of environmental protection measures, environmental protection departments all over the country have increased their efforts to investigate and deal with illegal discharges and non-standard discharges; The phenomenon of discharged water exceeding the standard still occurs. [0003] 1. Reasons for excessive emissions [0004] The main reasons for the discharge water exceeding the standard in the normal operation of the sewage treatment system are as follows. [0005] Inhomogeneity of sewage leads to excessive discharge: The corresponding treatment unit of the sewage treatment station is designed according to the types and loads of pollutants provided by the sewag...

AI Technical Summary

Problems solved by technology

2. Existing guarantee process

[0009]Sewage on-line monitoring system: The sewage on-line monitoring system is to continuously and automatically monitor the discharged sewage through various monitoring instruments installed at the discharge outlet and upload it to the terminal for receiving It is a kind of monitoring equipment at the end (environmental protection department); the advantage of this monitoring method is that it can be automatically and continuously monitored, reducing the workload of manual sampling and monitoring; the main disadvantages are: there is secondary pollution in the digestion solution and test reagents; The parameters are inaccurate due to the interference of other ions in the water sample; the measurement range is small; the heavy metal content measurement technology is not perfect, and the data reproducibility of most total copper and total nickel analyzers is between 2% and 10%, which is accurate The degree of monitoring is poor; the monitoring part is the drain outlet. Once the monitoring fails, the sewage has already been discharged, and it is difficult to take effective remedial measures.

As shown in Figure 1, the existing sewage treatment discharge The process includes chemical precipitation, membrane solid-liquid separation, RO membrane reuse and other steps. After the above steps, the electroplating wastewater is directly discharged through the discharge port without detection. Some wastewater that does not meet the standard may also be discharged.

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