Method of treating cellulose containing waste water sludge for the manufacture of linerboard and cellulosic ethanol production
The current process relates to the treatment of a primary sludge that is produced from waste water treatment facilities such as a pulp mill or a pulp and paper mills. It further relates to a process of using the primary sludge in the production of cellulosic ethanol. It further relates to the use of the treated primary sludge in the manufacture of recycled linerboard.
1. A process for preparing a primary sludge, to be used in the manufacture of cellulosic ethanol, from industrial water effluent, including the step of treating the effluent with a chemical composition comprising benzalkonium chloride; sodium hypochlorite; and oxytetracycline.
2. The process according to claim 1 , wherein the solids of the primary sludge comprises at least 20% by weight of cellulosic fiber, can comprise at least 30% by weight fiber and may comprise at least 40% by weight cellulosic fiber.
3. The process according to claim 1 , wherein the chemical composition is added to the effluent stream in an amount of from about 100 ppm to about 1,000 ppm.
4. The process according to claim 1 , wherein the primary sludge is at least 40% by weight total solids.
5. The process according to claim 1 , wherein the amount of benzalkonium chloride relative to the total actives is from 40-75%, the amount of sodium hypochlorite is from 8-20% and the amount of oxytetracycline is from 0.1-1%.
6. The process according to claim 1 , wherein the chemical composition is added to the effluent stream prior to a filter press.
7. The process according to claim 1 , wherein the chemical composition is added to the industrial effluent stream at the filter press.
8. The process according to claim 1 , wherein the bacterial count in the primary sludge is less than 100,000.
9. The process according to claim 1 , wherein bio-organism activity in the aeration pond is unaffected by the chemical composition.
10. The process according to claim 1 , wherein the industrial effluent stream is from a pulp mill or a pulp and paper mill.
11. A process for preparing cellulosic ethanol comprising preparing a primary sludge from industrial effluent stream, as defined in claim 1 , and using the resulting primary sludge in the production of ethanol.
12. The process according to claim 11 , wherein the solids of the primary sludge comprises at least 20% by weight cellulosic fiber.
13. A process for preparing a primary sludge, to be used in the manufacture of recycled linerboard, from industrial waste effluent, including the step of treating the effluent with a chemical composition comprising benzalkonium chloride; sodium hypochlorite; and oxytetracycline.
14. The process according to claim 13 , wherein the solids of the primary sludge comprises at least 20% by weight cellulosic fiber.
15. The process according to claim 13 , wherein the chemical composition is added to the waste effluent stream in an amount of from about 100 ppm to about 1000 ppm.
16. The process according to claim 13 , wherein the amount of benzalkonium chloride relative to the total actives is from 40-75%, the amount of sodium hypochlorite is from 8-20% and the amount of oxytetracycline is from 0.1-1%.
17. The process according to claim 13 , wherein the chemical composition is added to the industrial effluent stream prior to the filter press.
18. The process according to claim 13 , wherein the chemical composition is added to the industrial effluent stream at the filter press.
19. The process according to claim 13 , wherein bio-organism activity in the aeration pond is unaffected by the chemical composition.