Processing method of waste water generated in printing ink plastic package container cleaning
A technology for plastic packaging and wastewater treatment, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Reduced disposal cost, easy removal effect
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[0027] Example 1
[0028] A wastewater treatment method for cleaning ink plastic packaging containers includes the following steps:
[0029] 1) Take the material, hot-soak the UV ink plastic packaging tank to obtain alkaline waste water, and hot-soak the water-based ink plastic packaging barrel to obtain acidic waste water;
[0030] 2) Mix, inject the above alkaline wastewater and acidic wastewater into the neutralization reaction tank and mix and stir until uniform;
[0031] 3) Acid precipitation precipitation, add 10% H to the mixed wastewater 2 SO 4 Dilute acid, adjust the pH to 3, add bentonite, stir and react to obtain a solid and liquid mixture;
[0032] 4) Filter press, pump the obtained solid and liquid mixture into a filter press for solid-liquid separation to obtain a filter residue and a first-grade filtrate respectively, wherein the filter residue is a filter residue containing ink and pigment, and the first-grade filtrate is a resin filtrate containing ink ;
[0033] 5) Fil...
Example Embodiment
[0040] Example 2
[0041] A wastewater treatment method for cleaning ink plastic packaging containers includes the following steps:
[0042] 1) Take the material, hot-soak the UV ink plastic packaging tank to obtain alkaline wastewater, and hot-soak the water-based ink plastic packaging barrel to obtain acidic wastewater;
[0043] 2) Mix, inject the above alkaline wastewater and acidic wastewater into the neutralization reaction tank and mix and stir until uniform;
[0044] 3) Acid precipitation precipitation, add hydrochloric acid to the mixed wastewater, adjust the pH to 3, then add bentonite, stir and react to obtain a solid and liquid mixture;
[0045] 4) Press filtration, pump the obtained solid and liquid mixture into a filter press for solid-liquid separation to obtain a filter residue and a first-grade filtrate, wherein the filter residue is a filter residue containing ink and pigment, and the first-grade filtrate is With Ink resin filtrate;
[0046] 5) Filter residue treatment...
Example Embodiment
[0051] Example 3
[0052] A waste water treatment method for cleaning ink plastic packaging containers includes the following steps:
[0053] 1) Take the material, hot-soak the UV ink plastic packaging tank to obtain alkaline wastewater, and hot-soak the water-based ink plastic packaging barrel to obtain acidic wastewater;
[0054] 2) Mixing, inject the above alkaline wastewater and acidic wastewater into the neutralization reaction tank and mix and stir until uniform;
[0055] 3) Acid precipitation precipitation, add 10% H to the mixed wastewater 2 SO 4 Dilute acid, adjust the pH to 4, then add bentonite, stir and react to obtain a solid and liquid mixture;
[0056] 4) Press filtration, pump the obtained solid and liquid mixture into a filter press for solid-liquid separation to obtain a filter residue and a first-grade filtrate, wherein the filter residue is a filter residue containing ink and pigment, and the first-grade filtrate is With Ink resin filtrate;
[0057] 5) Filter residu...
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