温度对好氧生物反应器填埋场稳定化进程的影响

为研究填埋温度对好氧生物反应器填埋场稳定化进程的影响,通过模拟实验,探讨了渗滤液及填埋垃圾性质随温度变化的趋势.结果表明:在20~40 ℃温度下,随着温度提高,渗滤液化学需氧量和氨氮消减速度越快; 40 ℃条件下,氨氮在56 d达到国家生活垃圾填埋场污染控制标准(GB16889—2008)规定的垃圾填埋场渗滤液氨氮排放浓度限值,比20 ℃时早84 d;温度越高,填埋过程中渗滤液累计产量越少,固相垃圾含水率与总有机碳含量的下降速度越快,垃圾降解越彻底;填埋结束时,填埋场稳定速度较快,垃圾体的沉降性能好,表明较高温度有利于加速填埋场的稳定化进程. 

Effect of Temperature on Stabilizing Process of Aerobic Bioreactor Landfill

Variations of the features of leachate and components of landfill at different temperatures were simulated experimentally to study the effect of temperature on the stabilizing process of aerobic bioreactor landfill.The results indicated that the concentration of chemical oxygen demand (COD) and ammonia nitrogen of leachate decreased more rapidly at higher temperature between 20-40 ℃. Moreover, the concentration of ammonia nitrogen at 40 ℃ reached the threshold limit value specified by GB16889—2008 standards after 56 d, which is 84 d earlier than that at 20 ℃. Higher temperature between 20-40 ℃ would result in a less leachate yield and a more remarkable decline in moisture content of solid waste and total organic carbon (TOC) in the whole landfill process, and thus brought a thorough degradation of wastes. When the landfill was finished, it subsided and stabilized rapidly. Therefore, higher temperature is beneficial for acceleration of stabilization of landfill.