垃圾渗滤液氨态氮与挥发性脂肪酸馏出规律研究

为了提高垃圾渗滤液氨态氮（NH4^＋-N）与挥发性脂肪酸（VFA）联合滴定分析结果的准确性，试验研究了NH4^＋-N与VFA的馏出规律，并在此基础上对联合滴定方法的优化进行了探讨。结果表明：测得的NH4^＋-N质量浓度（Y1）、VFA浓度（Y2）与馏出液体积（X）分别符合函数关系式；联合滴定分析过程中，渗滤液样品NH4^＋-N质量浓度应稀释至150mg／L-200mg／L，NH4^＋-N馏出液应大于蒸馏液体积的60％；VFA分析应采用“一次蒸馏80％＋二次蒸馏”的方式，且VFA二次馏出液应大于蒸馏液体积的75％（相对误差限εr〈5％）。

Study on Distilled RegulationsofNH +4 - N and VFA ofLandfillLeachate

In ordertoimprovetheaccuraciesof NH +4 - N andVFA combinedtitrimetricanalysisoflandfillleachate, the experimentsofdistillingrulesof NH +4 - N andVFA wasperform ed, andtheoptimization methods ofthe combinedtitrim etricanalysiswasdiscussed. Theresultsshowedthatthemeasured NH +4 - N massconcentration( Y 1 ), VFA molarconcentration( Y 2 ) and distillate volume( X ) wereinline withtherelation. In the processofcombinedtitrim etricanalysis, thebestresultswereobtainedif NH +4 - N massconcentration ofleachate samples were dilutedto150mg/L~ 200mg/L, thevolumeof NH +4 - N distillate wasover60% ofthe distillandvolume. Therelativeerrorlim it r waslessthan5% ifthewayof firstdistillation80% plussecond distillation wasusedtoanalyzeVFA molarconcentration, andthevolum eofVFA distillate wasover75% ofthe distilland volumeinthesecond distillation.