The inoculum was a mixed population from the activated sludge tank of a waste-water treatment plant.
To minimise costs most sludges are dewatered but the final solids content achieved and the methods employed vary greatly.
Again the eighteenth century is the sketchy before-picture, the primeval sludge out of which modern, industrial society emerges.
The use of genetic engineering (included in excluded methods), ionizing radiation and sewage sludge is prohibited.
We hear the truck, a struggle, a screaming man falling into an abandoned oil well, sludge being dumped into the hole.
The footnotes to the table say that all the technologies incorporate a primary sedimentation tank and, for biological treatment, an activated sludge process.
Faecal sludge is then poured into the pit, requiring several trips of the emptying truck.
On-site sanitation: when the pits are full - planning for resource protection in faecal sludge management.
