城市生活垃圾好氧堆肥中氨气变化及其影响_单爱丽

经验交流城市生活垃圾好氧堆肥中氨气变化及其影响单爱丽王帆严红(大连大学环境与化学工程学院，辽宁大连116622)摘要:堆肥过程中氮素损失比较严重，而氨气挥发是氮损失的主要途径。利用城市生活垃圾进行好氧堆肥，研究其堆肥过程中氨气变化规律及其对堆肥性质的影响。结果表明:在堆肥期间，氨气含量先增加后减小，最后基本稳定在5mg/kg左右;而全氮含量先降低后增加;硝态氮含量先降低后增加;铵态氮是先快速增加，后缓慢减小至稳定;pH值先下降后升高，最终稳定在中性范围内;w(C)/w(N)先增加后下降;有机质含量显著下降。关键词:城市生活垃圾;好氧堆肥;氨气THECHANGEINAMMONIAANDITSEFFECTDURINGAEROBICCOMPOSTINGOFMUNICIPALSOLIDWASTESShanAiliWangFanYanHong(CollegeofEnvironmentandChemicalEngineering，DalianUniversity，Dalian116622，China)Abstract:Aheavylossofnitrogenoccursintheprocessofcomposting，whereastheammoniavolatilizationistheprimarypath.Municipalsolidwastes(MSW)compostingwithaerobiccompostingtechnologywasstudiedonthechangeofammoniaanditseffectoncharacterofcompostingintheprocessofcomposting.Theresultsshowedthatammoniacontenthadaincreaseafterdecreasetillto5mg/kg;thedynamicvariationsofcontentofthetotalnitrogenfirstdecreasedandthenincreased;aminonitrogencontenthadaslowreductionafterasignificantincreaseuntilastabilization，onthecontrary，nitratenitrogencontentfirstdecreasedan