Microbes in Sewage Treatment

 Name one condition that should be maintained in a sludge digester where biogas is produced.

The primary effluent in the treatment of sewage is sent to tanks for secondary treatment in the presence of aerobic bacteria. How would the BOD of the effluent be affected if anaerobic bacteria are used for secondary treatment? 

BOD of waste water is estimated by measuring the amount of

What is primary treatment in biology?

Water samples were collected at points A, B and C in a segment of a river near a sugar factory and tested for BOD level. The BOD levels of samples A, B and C were 400 mg/L, 480 mg/L and 8 mg/L respectively. What is this indicative of? Explain why the BOD level gets reduced considerably at the collection point C?

_____ sludge is formed during the secondary sewage treatment.

Define activated sludge.

Activated sludge is used as the inoculum for _____ sewage treatment.

Activated sludge acts as the inoculum for primary sewage treatment.

_____ occurs during the formation of primary sludge.

_____ is generated from chemical precipitation, sedimentation of particles of sewage.

At what stage is the primary sludge formed during the sewage treatment?

Primary sludge is formed during the first part of secondary sewage treatment.

 In _____ Yamuna action plan was implemented.

The Government of India has taken several initiatives for the restoration of the river. Which of the action plan is accomplished with Japan?

Wastewater treatment generates a large quantity of sludge, which can be treated by

_____ including sewage can be treated in an integrated manner, by utilising a mix of artificial and natural processes.

Write a short note on microbes in sewage treatment.

What type of drainage system was used in the Harappan Civilization?

What is the primary purpose of the drainage system found in Mohenjodaro?