Dear brothers and sisters, please help
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I’m currently considering a wastewater treatment process for pig farms, specifically one designed to handle organic wastewater with high concentrations of ammonia. The process is supposed to operate at low temperatures; the basic design involves anaerobic and aerobic stages. However, I’m not sure yet about the specific treatment units and process parameters needed. I hope everyone here can help me out! ! Thank you first, brother!
The water volume isn’t large, so coagulation sedimentation will suffice; the key is to choose the right chemicals
Be more specific about your water quality data; it’s too vague! ! !
The water volume is around 60 tons per day; the COD level is about 6,000, while the ammonia nitrogen level is 1,200. The main issue is the long periods of low temperatures
It’s impossible! ! It would be great if it were that simple. An ammonia nitrogen level of 1200 results in too high costs; a lower level of ammonia nitrogen is more feasible. To remove ammonia nitrogen through precipitation, MgHPO4 is used – do you know how much it costs per ton? This post was last edited by cbx1217 on 2008-4-16 11:12.]
Is SS high? What is BOD5? The biochemical method or the AO process can be considered; it will work!
It is extremely difficult to treat aquaculture wastewater to meet the standards (Grade 1 of the comprehensive wastewater discharge standards). The main reason is the high level of nitrogen present; when ammonia nitrogen exceeds 400 ppm, it has a significant inhibitory and toxic effect on anaerobic microorganisms, while levels above 200 ppm are toxic to aerobic microorganisms. As a result, nitrogen pretreatment is quite complicated. A flow rate of 60 tons per day is not too high, and the magnesium ammonium phosphate formation method based on physical and chemical processes can be used to handle this situation. Although the treatment cost is high, the capital costs are low, with the treatment cost per kilogram of nitrogen being around several dozen yuan. But the resulting precipitate can be used as fertilizer. It is relatively simple to use biochemical methods on the treated wastewater from comparison purposes; generally, the contact oxidation method is employed along with oxidation ponds or wetlands, which helps ensure that the standards are met.
Is there any industrial application for the magnesium hydrogen phosphate precipitation method? Is its cost extremely high? If anyone knows, please share it
Wastewater with high ammonia nitrogen concentrations must first undergo physical and chemical treatment; only after the concentration is reduced to around 300 mg/L can biological treatment be carried out. High-concentration COD is first subjected to anaerobic degradation followed by regeneration treatment; the SBR or two-stage AO process is recommended.