针铁矿和菱苦土强化养殖粪污厌氧发酵液中氮、磷固定的研究  

Goethite and Magnesia Enhanced Consolidations of N and P in Anaerobic Fermentation Wastewater of Manure

作　　者：周跃飞[1] 归显扬[1] 陈天虎[1] 姚敦璠 何光亚[1] 张楠[1] 黎少杰[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《矿物学报》2011年第4期726-731,共6页Acta Mineralogica Sinica

基　　金：国家重点基础研究发展计划(973)项目(编号:2007CB8156032011CB411904);国家自然科学基金(批准号:40802015)

摘　　要：对比研究了养殖粪污厌氧发酵体系中添加针铁矿和/或菱苦土对N、P固定的作用。实验过程中对溶液pH进行监控,厌氧发酵44 d后,对发酵液中氨氮和磷浓度进行了分析,对固体产物进行了XRD和SEM分析。结果表明:单独或同时添加针铁矿、菱苦土的厌氧发酵罐中,发酵液中N、P浓度均降低,其中N浓度降幅小于P,添加菱苦土厌氧发酵罐中P浓度降幅较大,达90%以上。单独添加针铁矿的厌氧发酵罐中,针铁矿发生还原分解,转化为铁白云石;添加菱苦土的厌氧发酵罐中,形成了大量鸟粪石。研究认为在养殖粪污厌氧发酵体系中,由于碱金属离子的影响,针铁矿和菱苦土对N的固定作用不明显;针铁矿对P的固定效果一般,菱苦土对P固定效果显著,固P产物鸟粪石可作为优质缓释肥使用。This study investigated the transformations of goethite and magnesia in anaerobic fermentation systems of manure and their effects on the consolidations of N and P.Four fermentation experiments,with no mineral,only goethie,only magnesia and both goethite and magnesia added were executed for 44 days.During the experimental period,pH variations were monitored constantly.After the experiments,the concentrations of N and P in the solutions and characteristics of residual solids were determined.The results showed that N and P concentrations decreased both in goethite and magnesia contained experiments,with N concentration decreased less than that of P.P concentration decreased sharply in magnesia contained experiments（90%）.In experiment with only goethite added,goethite was transformed into ankerite.In magnesia added experiments,magnesia was transformed mainly into struvite.This study indicated that in anaerobic fermentation system of manure,both goethite and magnesia had little effect on N consolidation because of the interference of alkaline ions.Magnesia is much more efficient than goethite to consolidate P due to forming struvite,a mineral with high N and P contents.

关 键 词：养殖粪污 厌氧发酵 针铁矿 菱苦土 鸟粪石 

分 类 号：P579[天文地球—矿物学] X705[天文地球—地质学]