Chemical wastewater recovery processing technique and apparatus
A technology for chemical wastewater, recycling and treatment, applied in flotation water/sewage treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc. It can achieve the effect of less floor space, improved biodegradability, and compact layout.
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[0032]According to Figure 1 and Figure 2, the wastewater enters the adjustment tank 2 through the grid 1 at 25,000 liters / h, and lime water is added to adjust the pH value of the wastewater. The pH value is adjusted to 7.5-8.5, which meets the pH conditions of biochemical treatment. At the same time, the amount and quality of wastewater are adjusted; enter the primary sedimentation tank 3, add 5% polyaluminum chloride flocculant from the upper part, add 150kg / d, let stand for 3-4 hours, remove the water, which is suitable for sedimentation and has a large specific gravity The sedimented sludge is discharged through the bottom sludge discharge port 13, which is controlled by a valve 12 on the sludge discharge port 13. After precipitation, the upper water enters the hydrolysis acidification tank 4, and uses anaerobic bacteria and hydrogen phosphate at room temperature. Ammonia, urea, fecal water, decompose the ammonia nitrogen and benzene impurities in the wastewater, reduce the cod...
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