Environmental Engineering Research Center, School of Civil and Environmental Engineering, Nanyang Technological University, Blk N1-B3, 50 Nanyang Avenue, Singapore 639798, Singapore.
J Hazard Mater. 2010 Apr 15;176(1-3):638-43. doi: 10.1016/j.jhazmat.2009.11.079. Epub 2009 Nov 18.
Odorous H(2)S and NH(3) gases were effectively biodegraded in a horizontal biotrickling filter (HBTF) packed with H(2)S-exhausted carbon. During the process, the operational characteristics including the distribution of degradation products, biomass accumulation and biological activity, carbon surface characteristics and pressure drop were investigated. The results show that the content of biodegradation products on carbon was low, i.e. 0.9-2.8 wt% S and 0.3-1.0 wt% N. The low content benefited the stable operation of the HBTF, due to preventing a toxic concentration of degradation products on packing bed over a long-term operation. The biomass was distributed evenly along the HBTF . This avoided the problems of bed clogging and activity loss. On the other hand, the deteriorated performance was observed due to the biomass accumulation over a long-term operation. Carbon surface characteristics in the HBTF remained almost unchanged. pH values of carbon were neutral and micropore structure of carbon remained relatively stable. In addition, the pressure drop in the HBTF was very low. These operational characteristics of the HBTF system significantly contributed to efficient co-removal of H(2)S and NH(3) in the HBTF over a long-term operation.
含 H(2)S 尾气的炭在水平式生物滴滤塔（HBTF）中有效地降解了恶臭的 H(2)S 和 NH(3)气体。在此过程中，考察了包括降解产物分布、生物量积累和生物活性、炭表面特性和压降在内的操作特性。结果表明，炭上的生物降解产物含量较低，即 0.9-2.8wt% S 和 0.3-1.0wt% N。由于在长期运行中防止了降解产物在填充床中形成毒性浓度，因此低含量有利于 HBTF 的稳定运行。生物量沿 HBTF 均匀分布。这避免了床层堵塞和活性损失的问题。另一方面，由于长期运行导致生物量积累，出现了性能恶化的现象。HBTF 中的炭表面特性几乎没有变化。炭的 pH 值呈中性，炭的微孔结构保持相对稳定。此外，HBTF 中的压降非常低。这些 HBTF 系统的操作特性显著有助于在长期运行中高效去除 HBTF 中的 H(2)S 和 NH(3)。
