Published Paper Details:

The small pulp and paper mill do not have chemical recovery plant because chemical recovery is the most capital intensive single unit operation in a pulp mill. Due to high capital cost, installing a chemical recovery for small mill is not viable. These mills either discharges the cooking liquor into nearby stream or on land which causes water and land pollution. The spent pulping liquor contain lignins as the major organic component responsible for pollution and since lignin is broadly non-biodegradable. The addition of organic matter to the soil usually increases the water holding capacity of the soil. This is because the addition of organic matter increases the number of micro pores and macrospores in the soil either by "gluing" soil particles together or by creating favourable living conditions for soil organism and ultimately soil condition improves. The present study attempt is made to increase the biodegradability by incorporation of nitrogen. The study revealed that the nitrogen enrichment enhanced the biodegradability of lignin. When this modified lignin applied to soil underwent humification and improved the physico chemical properties of soil.