pulp paper chemicals – water and wastewater treatment at chile

pulp paper chemicals – water and wastewater treatment at chile
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  • Why is pulp & paper industry a water pollution hazard?
  • Pulp and paper industry is coming under one of the most water polluting industries, and generated wastewater is highly toxic in nature. The paper mill requires huge quantity (~50–60 m 3 of water to produce one ton of paper) of water, and accordingly huge quantity of chemical contaminated wastewater is discharged.
  • How does the pulp & paper industry use water?
  • The pulp and paper industry consumes enormous amounts of water and natural resources and is also one of the largest effluents generators. Before the 1970s, wastewaters from the pulp and paper mills were normally discharged directly to the rivers or lakes, without any treatment or even a rough primary treatment.
  • What is the pulp and paper industry?
  • The pulp and papermaking industry is a significant consumer of fresh water and generates dark-brown-colored wastewater during various stages of pulp and papermaking activities. Policies and ethics surrounding the treatment of this wastewater are important considerations.
  • What are the major wastewater producers in the pulp-and-paper industry?
  • Wood preparation, pulp washing, pulp bleaching and paper making processes as well as the digester house are the major wastewater producers in the pulp-and-paper industry. The volume of wastewater produced in each process is closely related to the quantity of generated pulp in that particular process (The World Bank Group, 1999).