Monitoring and performance of a desulphurizing biotrickling filter with an integrated continuous gas/liquid flow analyser

作者：Montebello Andrea M; Baeza Mireia; Lafuente Javier; Gabriel David^*

来源：Chemical Engineering Journal, 2010, 165(2): 500-507.

DOI：10.1016/j.cej.2010.09.053

• FIA
• GD-CFA
• On-line monitoring
• Hydrogen sulphide
• Desulphurization
• Biotrickling filter

Biological processes have proved to be suitable for desulphurization of energy-rich gases containing high loads of H(2)S((g)). However, monitoring devices for assessing such bioreactors performance are still scarce. In this work, an analytical system consisting in a flow injection analyser (FIA) for total dissolved sulphide (H(2)S((ag)) + HS(-) + S(2-)) (TDS) and a continuous flow analyser with a gas diffusion step (GD-CFA) configuration for H(2)S((g)) have been used for on-line monitoring of a biotrickling filter for desulphurization of biogas mimics under aerobic conditions. Analyses were validated versus commercial sensors during real-time monitoring of the biotrickling filter performance under aerobic and anoxic conditions. During the aerobic period monitoring reported herein, the inlet H2S concentration was stepwise increased from 2000 ppm(v) (51 g H(2)S m(-3) h(-1)) up to 8000 pPm(v) of H(2)S (215 g H(2)S m(-3) h(-1)). Complementary off-line measurements of other sulphur species allowed assessing a sulphur mass balance, which indicated that S(0) production proportionally increased with an O(2)/H(2)S ratio decrease. Under the studied conditions, the maximum TDS concentration detected in the liquid phase was 3.08 mg S(2-) L(-1) while the maximum elimination capacity of the reactor was 201 g H(2)S m(-3) h(-1) and the maximum removal efficiency was 100%. The FIA/GD-CFA results demonstrated that the proposed analytical system is reliable for on-line monitoring applications and can serve as a valuable tool to understand the complex mechanism of biological desulphurization.

• 出版日期2010-12-1