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Siqueira, LCG. Treatment of Odorous Toxic Organic Compounds by Bioreactor. São Paulo, 2011 [Doctoral Thesis School of Public Health USP]. Introduction It is important to develop control systems for air pollution that are efficient, applicable to the national condition and to the protection of human health, since the group BTEX compounds are toxic. Objective To evaluate the performance of biological treatment system for BTEX vapors and investigate the best operating conditions for the design criteria adopted. Methods This experimental work used a pilot plant consisting of a glass column (internal diameter 80 mm and height of 1.2 m) filled with a filter medium compost and Pall rings which supported microorganisms and where biodegradation was carried out. Parameters were monitored such as temperature, pressure drop, flow rate, gas concentration at the inlet and outlet, which formed the basis for developing interventions and improve their performance. The gas analysis was measured by photoionization (PID) in a portable device. Conclusions -. We conclude that it is feasible biological treatment for removal of BTEX emissions, operating in the adopted conditions, with maximum removal efficiency (ER) of around 90%. The maximum efficiency was obtained for empty bed retention time (EBRT) of 2.4 min, surface loading (SL) of 11.9 m/mxh, concentration load (CL) g/m3xh 67 and elimination capacity (EC) of 4 g/mxh. The use of Pall rings mixed with the compost prevented high levels of pressure drop. It is relevant the participation of adsorption process. The use of compost proved to be feasible as an alternative to the biodegradation of BTEX, strengthening its use in the environmental practice.

Tratamento de compostos orgânicos odoríferos tóxicos por biorreatores