Question

Dried sludge is used as.
A.Manure
B.source for biogas
C.Fertilizers
D.Both A and B

Answer 1

Hint: Sludge is a semi-solid matter which is considered as the waste matter for all the Industries and water plants. This sludge from the Industries is recycled and kept for use. It can be generated by sanitation, and from sedimentation. These can be obtained from septage.

Complete answer:
A.Manure: It is animal dung which has many potential benefits it can use to decrease the soil erosion and carbon levels in nature the dried sludge in aerobic conditions which the help of bacteria the waste is consumed and the rest can be used as manure
So option A is the correct answer
B.source for biogas: it is naturally produced organic matter from the environment whereas the dried sludge is the matter obtained by the industrial waste which is modified and recycled to use for the human benefits
So, option B is not correct.
C.Fertilizers.: dried sledge can be used as manure instead of putting it as waste matter but indirectly it is used as fertilizers such as manure which is prepared from the dried sledge can be used as fertilizers to enhance the soil ability to support the crop production so, it can’t be directly used as fertilizer but dried sludge as manure can be used.
So, option D is not correct.

Hence, the correct answer is option (A).

Note: Dried sludge can be prepared by sludge drying process which is converting the sludge into products supported by the removal of water and storage volume. The proportions of sludge must be considered while using it for soil development and crop growth.
Sludge is a kind of human waste left during sewage treatment of wastewater. It is a type of organic waste, which is used in the production of manure and biogas.