Control of temperature in high-salt waste treatment reactors
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Currently, one stream of high-salt wastewater from a refinery’s desulfurization and denitrification processes is being treated, following the process sequence of nitrification – denitrification – COD reactor – clarifier. The nitrification tank and the COD reactor are equipped with fans for ventilation. These bacteria capable of withstanding high salt levels require a temperature range of 20–35°C. The reaction tanks are of semi-underground design, and they all contain fillers. The ambient temperature ranges from -10 to 39°C. How can the temperature of the reaction tank be controlled? For heating in winter, I’m thinking of using hot water coils; what about in summer? How to cool down?
During summer, the water temperature should remain within the range required by halophilic bacteria; if it is necessary to lower the temperature, use a cover to protect it from direct sunlight. Personally, I think the temperature changes are too drastic; bacteria surely can’t tolerate them.