Novel diving jet-type biological aerated filter
An aerated biological filter, biological filter technology, applied in sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Unfavorable microbial growth, pollutant metabolism, affecting sewage treatment effect, etc., to achieve the effect of improving effluent treatment effect, improving oxygen transfer efficiency, and improving gas-liquid mixing effect
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[0019] Example one:
[0020] For the treatment of a certain domestic sewage, the raw water quality conditions are: chemical oxygen demand (COD cr ) Content 250-300mg / L, biological oxygen demand (BOD 5 ) The content is 120-150mg / L, ammonia nitrogen is 8-10mg / L, total nitrogen (TN) is 20-25mg / L. Through the self-priming jet biological aerated filter treatment, the water conservancy retention time is 4 hours, after the system runs stably for a period of time, after the sewage is processed, the final effluent COD cr Below 20mg / L, BOD 5 Below 5mg / L, ammonia nitrogen is 2-5mg / L, total nitrogen is less than 10mg / L, and the effluent meets the first level A standard of "Pollutant Discharge Standard for Urban Wastewater Treatment Plant" (GB18918-2002).
Example Embodiment
[0021] Embodiment two:
[0022] Treat a certain industrial wastewater, the wastewater is a certain food production wastewater, the raw water quality condition is: COD cr Content 500-700mg / L, BOD 5 The content is 300-400mg / L, ammonia nitrogen is 10-20mg / L, total nitrogen is 30-40mg / L. This kind of wastewater has good biodegradability, so it is directly treated by the self-priming jet aerated biological filter, and the water retention time is 6 hours. After the system runs stably for a period of time, after the wastewater is treated, the final COD of the effluent is cr Below 30mg / L, BOD 5 Below 5mg / L, ammonia nitrogen is 2-5mg / L, total nitrogen is less than 10mg / L, and the effluent reaches the industry discharge level A standard.
[0023] The invention uses a submersible jet aerator to replace the original blast aeration equipment, and the filled air is forced to mix with the liquid in the casing, so an excellent gas-liquid mixing effect can be obtained. At the same time, due to the ...
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