FIELD: process.
SUBSTANCE: sludge containing organic matters, ferrous iron and phosphorus are treated at 0-100°C acid at pH 1-5 for solution of ferrous iron and phosphorus for sludge. Molar ratio of iron to phosphorus in sludge after solution is higher then 1:1. Into sludge it is added oxidant, extracted from hydrogen peroxide and per-compounds, ferrous iron at that is oxidised according to reaction of Fenton till ferric iron. Ferric iron is fall out in the form of phosphate of ferric iron, during the process of Fenton reaction behavior there are formed free radicals with deodorising and disinfecting effect, the sludge is dewatered at pH the highest 7, and water solution received during dewatering is directed to recirculation to the process of waste water treatment.
EFFECT: reduction of sludge capacity, reduction of its water yield.
14 cl, 1 dwg, 4 tbl, 4 ex
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