4MCGRATH S P.CHANG A C,PAGE A L,et al.Land application of sewage sludge:scientific perspectives of heavy metal loading lim its in Europe and the United States[J].Environ Rev,1994,2(1):91-107.
5GEA T,FERRER P.Co-composting of sewage sludge:fats mixtures and characteristics of the lipases involved[J].biochemical Engineering Journal,2006,(9):64-66.