A method for treating spray paint wastewater
A technology for wastewater treatment and liquid treatment, which is applied in waste coating treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve problems such as difficult discharge standards for effluent water quality, large volume of wastewater to be treated, and unsuitable for large-scale application. Achieve the effect of accelerating the speed of precipitation, low treatment cost, and improving wastewater
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Embodiment 1
[0024] A method for treating spray paint wastewater, comprising the steps of:
[0025] 1) Pass the collected spray paint wastewater through the grid to remove suspended matter, and obtain the first treatment liquid after staying for aeration;
[0026] 2) Adding a pH regulator to the first treatment solution obtained in step 1), and adjusting the pH value to obtain the second treatment solution;
[0027] 3) Adding soluble superphosphate to the second treatment solution obtained in step 2) for the first stirring reaction to obtain the third treatment solution;
[0028] 4) Add ferrous salt solution to the third treatment solution obtained in step 3), and carry out the second stirring reaction to obtain the fourth treatment solution;
[0029] 5) Add a coagulant to the fourth treatment solution obtained in step 4) for the third stirring, then add the coagulant and stir for the fourth time, and let stand to separate;
[0030] 6) Remove the suspended solids in the upper layer after...
Embodiment 2
[0037] A method for treating spray paint wastewater, comprising the steps of:
[0038] 1) Pass the collected spray paint wastewater through the grid to remove suspended matter, and obtain the first treatment liquid after staying for aeration;
[0039] 2) Adding a pH regulator to the first treatment solution obtained in step 1), and adjusting the pH value to obtain the second treatment solution;
[0040] 3) Adding soluble superphosphate to the second treatment solution obtained in step 2) for the first stirring reaction to obtain the third treatment solution;
[0041] 4) Add ferrous salt solution to the third treatment solution obtained in step 3), and carry out the second stirring reaction to obtain the fourth treatment solution;
[0042] 5) Add a coagulant to the fourth treatment solution obtained in step 4) for the third stirring, then add the coagulant and stir for the fourth time, and let stand to separate;
[0043] 6) Remove the suspended solids in the upper layer after...
Embodiment 3
[0050] A method for treating spray paint wastewater, comprising the steps of:
[0051] 1) Pass the collected spray paint wastewater through the grid to remove suspended matter, and obtain the first treatment liquid after staying for aeration;
[0052] 2) Adding a pH regulator to the first treatment solution obtained in step 1), and adjusting the pH value to obtain the second treatment solution;
[0053] 3) Adding soluble superphosphate to the second treatment solution obtained in step 2) for the first stirring reaction to obtain the third treatment solution;
[0054] 4) Add ferrous salt solution to the third treatment solution obtained in step 3), and carry out the second stirring reaction to obtain the fourth treatment solution;
[0055] 5) Add a coagulant to the fourth treatment solution obtained in step 4) for the third stirring, then add the coagulant and stir for the fourth time, and let stand to separate;
[0056] 6) Remove the suspended solids in the upper layer after...
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