Thermocatalytic and Chemical Treatment of Lignin-Aluminum Sludge and Utilization of the Resulting Adsorbent-Coagulant
Water Science and Technology
, E-ISSN: 1996-9732
||Adsorbent; adsorbent-coaqulant; aluminium sludqe; coaqulation; thermocatalytic processinq; waste water
The Leningrad Technological Institute of Pulp and Paper Industry 4, Ivan Chernykh Str., Leningrad, 198092 USSR
The Bratsk Industrial Institute 40, Makarenko Str., Bratsk, 665709 USSR
The Institute of Catalysis S.D. A.Sc. USSR 5, Nauki Pr. Akademgorodok, Novosibirsk, 630055 USSR
Lignin compounds pass through conventional biological treatment. Purification efficiency can be improved by chemical coagulation with e.g. aluminium sulphate. The generated aluminium sludge can be converted into adsorbent-coagulant by thermocatalytic and sequential chemical disposal. A thermocatalytic reactor with the temperature range from 400-degrees to 700-degrees-C and with copper-chromium catalyst was applied to treat aluminium sludge. The resulting adsorbent-coagulant removed colour up to 95% and COD up to 75% from diluted kraft black liquor.