Configuration and evaluation of a pid control system based on static pressure criteria applied to airflow control.

Abstract

With the growing concerns around environmental and health issues related to air pollution, farmers have recently invested in the construction of biofilters in order to reduce or even remove hazardous and odorous gases from the swine stored waste exhausted air. In this process known as bioconversion the waste air is pulled from the tank headspace and forced through a biofilter media. This procedure is done with a ventilation control system that detects variations on static pressure differential inside and outside storage tank and automatically controls the fan rotation in order to correct the air flow rate, maintaining it at a set-point value. This work presents the configuration and evaluation of the equipments used to control the biofilter ventilation. Results show that the composing equipments of the biofilter’s ventilation control system were efficient and had good performance.