RECULTIVATION OF SLURRY RESERVOIRS OF BLEACHED SULPHATE CELLULOSE MANUFACTURERS Russian patent published in 2014 - IPC C02F11/14 B09B3/00 

FIELD: process engineering.

SUBSTANCE: invention relates to environmental protection and can be used for processing of wastes of bleached sulphate cellulose production with application of sulphate process. Recultivation of slurry reservoirs comprises removal of slurry water, application of the later of burnt coal ash on reservoir surface, ash being neutralised by store in ash ponds to acidity of ash aqueous extract pH 7.0-8.0.Slurry-to-ash ratio is selected to make 1:1-2:1. Said materials are mixed layer-by-layer, water released at their interaction is removed to get ash-slurry-lignine substrate.

EFFECT: improved environmental protection, lower decontamination costs, higher quality of treatment, recycling of processed wastes.

2 cl, 1 tbl