The dissolved oxygen level in the aerobic tank is only around 0.3 – how can this be resolved?
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The sedimentation ratio is very high; when 500 ml was measured using a cylinder, after 30 minutes only about 20 ml of supernatant remained. The temperature was measured to be 42°C. Is it to increase sludge discharge? Most studies indicate that the settling ratio is between 30% and 40%; with such low amounts of sludge, can it still degrade COD and ammonia nitrogen? Do microorganisms die if the temperature is too high? What should be done if it dies? Should we still control the temperature now or not?
What process? 42 degrees – that’s clearly too high; the ideal temperature is around 30 degrees
This post was last edited by slll611 on 2016-9-28 at 21:52. Check the processing technology; providing more parameters will facilitate better communication. The sedimentation ratio of the MSR high-concentration sludge biological treatment tank we produce is indeed this high; however, thanks to our patented DJT aerating pump, the dissolved oxygen level can reach 1.2. Your value of 0.5 is too low. It can handle high-salt chemical wastewater, landfill leachate, etc.
42°, the temperature is too high; the dissolved oxygen level is so low – is there no aeration?
When the water temperature exceeds 40°C, most protozoa cannot survive, let alone effectively degrade organic matter. High water temperatures also reduce the dissolved oxygen in the water, creating a vicious cycle. It is recommended to lower the water temperature and increase sludge discharge. , to increase dissolved oxygen.
The operating temperature is too high; what is the quality of the water? Why is the operating temperature still so high in winter? Is normal operation being maintained, and are the COD and ammonia nitrogen levels in the effluent within acceptable limits?
Temperature is a crucial parameter. In the case of sludge, check whether there is any sludge leakage; if the quality of the effluent is poor, then sludge removal is necessary. Can bacteria withstand such high temperatures?
The temperature is too high; how can bacteria survive it? Increase sludge discharge and see.
High operating temperatures reduce the solubility of oxygen in water. If it’s not possible to lower the water temperature, the only options are to increase the aeration volume or use oxygen-enriched aeration (which is very expensive, as it requires a PSA system).
It is recommended to get some understanding of the activated sludge process