Study of Secondary Spent Wash after Biogas Recovery as Biogas Effluent

Abstract

Potash can be recovered more easily by centrifuge from secondary

spent wash after concentration than the primary spent wash, secondary

spent wash concentrate being less viscous and thinner. About

6 tons of potash in good form can be daily obtained against about

7 tons from primary spent wash. Carbon that can be obtained by

the method already used though less than primary spent wash is

sufficient to pose problems of pollution. daily about 8 to 10 tonnes

of carbon will be available.