Pollution profiles, health risk of VOCs and biohazards emitted from municipal solid waste transfer station and elimination by an integrated biological-photocatalytic flow system: A pilot-scale investigation

Biogas biodesulfurization in an anoxic biotrickling filter packed with open-pore polyurethane foam

“…The BTF was filled with 2.25 L of inoculum solution. Half (50%, v/v) of the recirculation medium was replaced with inoculum solution before the nitrate was exhausted ([N-NO 3 -] < 20 mg L -1 ) to ensure the presence of bacteria and to improve the biofilm formation. On day 15, after three cycles, NMCa medium (1.125 L) was used as a fresh medium in the immobilization procedure (final nitrate concentration in the recirculation medium of 0.38 g N-NO 3 -L -1 ).…”

“…Two nitrate feeding regime methods were performed: manual (day 1-413) and programmed (day 414-620). In the manual method, before the nitrate was exhausted ([NaNO 3 -] < 20 mg N-NO 3 -L -1 ), 50% (v/v) of the recirculation medium was replaced by fresh medium (NMCa, NMNa or NMK mediums). In the programmed method, NMNa medium was fed in by a peristaltic pump.…”

“…Therefore, in the immobilization stage, the BTF was fed with calcium nitrate as the nitrate source (NMCa medium). The addition of calcium nitrate might produce an accumulation of precipitate in the support due to the low solubility of calcium salts that can be formed by reaction with other components present in the recirculation medium, e.g., CaCO 3 and Ca 3 (PO 4 ) 2 from CO 3 2-and PO 4 3-, respectively. Precipitate accumulation could cause clogging problems after long operating times.…”

“…Biofiltration is a safer and cleaner technology. The development of biofiltration has been rapid in recent years because it is less expensive than other technologies, has good performance at the pilot scale and in industrial applications, and is feasible for the treatment of a wide variety of gaseous effluents [3,4]. A biotrickling filter (BTF) is a packed bed bioreactor with biomass immobilized.…”

Odor compounds released from different zones of two adjacent waste treatment facilities: Interactive influence and source identification

“…In addition to the complexity created by the relative juxtaposition of odor sources and receptors, the characteristics of odor emissions can change during different operation times of treatment facilities (De Feo et al, 2013), which further increases the complexity of source identification. Until now, although the odor emissions from individual composting plants (Cadena et al, 2009), landfill sites (Capelli et al, 2008;Romain et al, 2008;Saral et al, 2009;Scaglia et al, 2011;Ding et al, 2012;Li et al, 2013), and transfer stations (Fang et al, 2013b) have been separately investigated, little research has been done on the interactive influence of odors from multiple sources at MSW facilities (Dorado et al, 2013).…”