FIELD: chemistry.
SUBSTANCE: invention can be used in treating water from bleaching cellulose pulp. The method involves addition of a calcium compound or aluminium compound to waste water, where the calcium compound is selected from a group consisting of calcium oxide, calcium hydroxide and inorganic calcium salts, and the aluminium compound is selected from a group consisting of a sulphate of polymeric aluminium hydroxide, chloride of polymeric aluminium hydroxide and formate of polymeric aluminium hydroxide. First, the calcium compound and waste water are mixed into a solution with pH between 4.5 and 7, and the aluminium compound is the added to this solution to precipitate lignin.
EFFECT: high efficiency of removing lignin from waste water from bleaching cellulose.
10 cl, 7 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REMOVING HUMIC SUBSTANCES FROM AQUEOUS ALKALINE SOLUTION | 2016 |
|
RU2717051C2 |
| METHOD AND DEVICE FOR PROCESSING LIQUID FLOWS ON PULP MILL | 2013 |
|
RU2634894C2 |
| METHOD FOR PREPARATION OF REAGENT, USED FOR SEWAGE PURIFICATION | 0 |
|
SU1742224A1 |
| METHOD OF REMOVING ANIONIC SURFACTANTS FROM WASTE WATER | 2012 |
|
RU2516510C1 |
| METHOD OF TREATING WASTE WATER FROM PRODUCTION OF FIBROUS INTERMEDIATE PRODUCTS FOR PAPER AND CARDBOARD MANUFACTURE | 2000 |
|
RU2155720C1 |
| METHOD FOR PURIFICATION OF WASTE AND PRODUCED WATER | 2023 |
|
RU2813075C1 |
| METHOD OF TREATING WASTE WATER OF WOOD-WORKING INDUSTRY | 0 |
|
SU1534005A1 |
| METHOD OF TREATMENT OF EXCESSIVE CIRCULATING WATER OF CARDBOARD PRODUCTION FOR ITS REUSE | 2000 |
|
RU2158327C1 |
| METHOD OF CLARIFYING AND RECYCLING CONDITIONALLY CLEAN WATER FROM FILTRATION FACILITIES OF WATER TREATMENT PLANTS BY TREATMENT WITH POLYMER-COLLOIDAL COMPLEX REAGENT | 2014 |
|
RU2547114C1 |
| METHOD FOR DEEP COMPLEX PURIFICATION OF HIGHLY CONCENTRATED MULTICOMPONENT FILTRATES OF LANDFILLS | 2022 |
|
RU2797098C1 |
