Will this range improve the microbial kinetics or negatively impact the growth rate?
The low solubility of oxygen limits the effectiveness of supplying oxygen into water. Often this leads to that activated sludge methods are difficult to operate and RBC and trickling filters are more favorable.
https://en.wikipedia.org/wiki/Rotating_biological_contactor
https://en.wikipedia.org/wiki/Trickling_filter
If I understood well what you mean, it depends on which microorganisms you use in your bio-remediation. Cyanobacteria, for example, act in a wide range of temperature. On the other hand, by transformation you can transfer plasmids from thermophilic bacterium to an active one>
My focus here is on biological treatment of wastewater. Most STPs in many countries operate under a temperature range of 15 to 25 oC. However, in several middle East countries, the temperature can range from 40 to 50 oC during summer. Are there any studies about the performance of STPs under such high temperature range? What are the impacts of such temperatures?
Professor Baawain, I don't know many papers about this but I have worked with plant operators and designers. My experience is that the water in the STP rarely rise above 35 °C even then the midday air temperatures approach 50 °C.
The main problem with operation is as I mentioned the poor oxygen transfer caused by the low solubility in water at higher temperatures. Another problem with activated sludge is that it tend to foam and filamentous organism increase in abundance.
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