Influencing factors of general ventilation rate for sludge composting plants

The general ventilation system of sludge composting plants has dual functions of protecting the indoor environment of the workshop and discharging the water vapor generated during the composting process. Based on the method of theoretical analysis, studies the water vapor transport effect of the general ventilation system and the main factors influencing the ventilation rate. The results indicate that the water vapor is a typical hazardous substance in sludge composting plants, and that the main influencing factors of general ventilation rate in sludge composting plant are the fermentation process, the outdoor meteorological parameters and the thermal parameters of building envelope. The analysis result of a typical case shows that the high ventilation rate does not always lead to the better control effect, and there exists an optimal ventilation rate.