矿化垃圾生物反应床处理NO_X废气的研究

Treatment of NO_X in waste gas streams using aged-refuse-based bioreactor

矿化垃圾(稳定化垃圾)是一种良好的生物介质,可作为生物反应床的填料处理NOX废气。实验室研究表明,稳定化垃圾反应床可有效地处理NOX气体,其硝化能力(以N计)可达0.83g/(kg·d)(干重)。NOX去除率受停留时间的影响显著,NOX去除率随着停留时间的缩短而降低。当空床停留时间为1.5min时,NOX气体的平均去除率为76.7%;空床停留时间为15min时,NOX气体的平均去除率为91.0%。在NOX进气负荷低于110mmol/(m3·h)时,NOX消除能力随进气负荷的增加而线性增加。当进气流量一定时,NOX去除能力随着进气NOX浓度的增加而线性增加。

The aged refuse taken from a closed landfill compartment with 8 years closure at Shanghai Refuse Landfill was used as media for making of a bioreactor. Laboratory study shows that the aged-refuse-based bioreactor can effectively remove NOX in waste gas streams and the nitrification capacity can reach up to 0.83 gN/(kg·d)(dried refuse).The removal efficiency of NOX was affected significantly by the empty bed retention time (EBRT), and decreases with the shortening of the EBRT, with a mean removal efficiency of NOX of 76.7% at EBRT of 1.5 min and that of 91.0% at 15 min. The elimination capacity of NOX was linear with the influent loading (<110 mmol/(m3·h)) and linear with the influent concentration of NOX when the gas flow was constant.