Discussion
Which of the following is a waste generated in the pulp and paper industry ?
Answer: A
The pulp and paper waste is Black liquor.
In kraft pulping, wood chips are cooked in white liquor (sodium hydroxide and sodium sulphide) to dissolve the lignin that binds the fibres. The spent cooking liquor, dark with dissolved lignin, is black liquor. It is the industry's main waste stream and is usually concentrated and burnt in a recovery boiler to regain chemicals and energy.
Spentwash is the effluent of molasses-based distilleries, and filter cake (press mud) is a residue of sugar mills. Since neither belongs to the paper industry, 'All of the above' is wrong.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development