primary sewage sludge

primary sewage sludge

[′prī‚mer·ē ′sü·ij ‚sləj]
(civil engineering)
A semiliquid waste resulting from sedimentation with no additional treatment.
References in periodicals archive ?
Metal partitioning among the various chemical fractions in the primary sewage sludge and the anaerobically treated SS is reported in Fig.