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Effect of wastewater temperature on deamination


Release time:

2024-04-28

Temperature has two effects on the process of membrane deamination.

Effect of wastewater temperature on deamination

Temperature has two effects on the process of membrane deamination.
On the one hand, the temperature of the wastewater has a very obvious impact on the deamination efficiency. As the water temperature decreases, the ammonia nitrogen removal effect of the wastewater will also become worse. The deamination data are shown in the table below. Therefore, increasing the temperature of wastewater is beneficial to improving ammonia nitrogen removal efficiency.

 Deamination membrane Ammonia nitrogen content(mg/L) Inlet water temperature(℃) Inlet water flow(L/m2.H) Effluent ammonia nitrogen (mg/L) Removal rate(%)
PTFE 558 40 5 1 99.8%
10 32.5 94.2%
616 30 5 23.6 96.2%
10 136.8 77.8%

On the other hand, higher water temperature and lower water temperature will damage the membrane contactor system. When the cold wave arrives, if antifreeze measures are not taken in time, once the membrane freezes, it will cause damage to the membrane, and this damage is It is irrecoverable; if high-temperature water (such as 70°C) enters the system, the membrane contactor head part will become soft, which may cause damage to the membrane contactor.
The ideal inlet water temperature is between 40-45°C. Designers will consider heat exchange before wastewater enters the membrane contactor to ensure stable operation of the membrane contactor and wastewater deamination efficiency.