摘要 |
<p>Reference is made to a process for treating sludge from discharge fluid, especially watery sewage sludge, whereby the sludge undergoes a drying process in a drying apparatus where the fluid content of the sludge is substantially separated from the drystuff content of the sludge, in order to produce a product material out of quantities of drystuff of the sludge having lower moisture, and the process is characterised in that during that portion of the drying process where the sludge passes through a phase of higher viscosity, a so-called glue phase, bits of a solid substance, so-called pellets, are added to the sludge.</p> |