 PULP AND PAPER Water Purification Waste Water Treatment/Recovery Conventional waste treatment is in many cases not adequate or cost-effective to meet required discharge limits for the pulp and paper industry. Membrane separation provides the added benefit of economical product separation and recovery. WATER PURIFICATION Purify make-up water - crossflow MF, UF and RO provide new cost-effective unit processes for filtering papermaking water supplies. WASTE WATER TREATMENT/RECOVERY Fractionate, concentrate and recover lignins from Kraft black liquor. Concentrate dilute pulp wash waters of 0.5% - 2% solids to 10% solids prior to evaporation. Concentrate dilute pressboard manufacturing waste with low pressure R.O. or U.F. and R.O. Remove colour from kraft bleach effluents. Recover titanium dioxide. |