How many types of trickling filters are used in sewage treatment?

Related Questions

• The BOD after the filtration of sewage from the low rate trickling filter is
•                is the ratio of volume of recirculated sewage to the raw sewage.
• is a method where water is used as a medium for the flow of sewage from its production of the treatment unit.
• Which of the following filter is used in the anaerobic treatment of sewage?
• The recirculation ratio for the low rate trickling filter is                        
• The organic loading in low rate trickling filter is 900 kg/hectare- meter/day. What is the efficiency of the filter?
• The color of the secondary sludge produced from the high rate trickling filter is                        
• The size of filter media in a high rate trickling filter is                        
• Primary treatment of sewage consists of removal of
• In preliminary treatment of sewage, the operation which takes place, is