Secondary treatment of sewage

Assertion : Secondary treatement of sewage is also called biological treatment while primary treatment is called physical treatment. Reason : Primary sewage treatment depends only upon sedimentation properties of materials present in sewage and filtration.

Assertion : Secondary treatement of sewage is also called biological treatment while primary treatment is called physical treatment. Reason : Primary sewage treatment depends only upon sedimentation properties of materials present in sewage and filtration.

Assertion : Secondary treatement of sewage is also called biological treatment while primary treatment is called physical treatment. Reason : Primary sewage treatment depends only upon sedimentation properties of materials present in sewage and filtration.

Secondary treatment in sewage treatment is

'Secondary treatment is sewage water treatment is called biological'. Justify.

Secondary treatment in sewage treatment is Physical Chemical Biological None of these

Name two gases produced during secondary treatment by sewage.

Masses of bacteria associated with fungal filaments to form mesh like structures in secondary treatment in sewage plants. What is it called?

Secondary treatment of the sewage is also called Biological treatment Justify this statement and explain the process.