✨Environment Engineering
*{IMP. Points}*
✨5 Days BOD is less than 4 days BOD keeping other conditions same.
✨If Biochemical oxygen demand(BOD) of a town is 20,000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is 400,000.
✨The rate of BOD exerted at any time is directly proportional to BOD remaining.
✨The ratio of 5 day BOD to ultimate BOD is about 2/3.
✨The minimum dissolved oxygen which should always be present in water in order to save aquatic life is 4 ppm.
✨The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is 100.
Dissolved oxygen in stream is maximum at noon.
✨Facultative bacteria are able to work in presence as well as in absence of oxygen.
✨The means of access for inspection and cleaning of sewer line is known as manhole.
✨Sewerage system is designed for maximum and minimum flow.
✨Lamp-Manholes:- Purpose Illuminating a Sewer Line.
✨Flushing Manholes:- Provided on Flat gradient where self cleaning velocity is reduced due to Flat profile.
✨Leaping Weir:-Separation of Storm Sewer & Sanitary Sewage.
✨Gully Trap:-Prov.at Junction of Sullage and Storm Water Basins.
✨Nahani Trap:-At the Head of each house drain.
✨P-Trap:- Water Closets.
✨Intercepting Trap:-Provided at Junction of House drain and Street Sewer
✨Vent Pipe:- Protects Trap Seal from Backflow.
✨Antisiphonage:-Preserves Water Seal in Trap
✨IDLING:-
When Automobiles give maximum unburned hydrocarbons it is called Idling
(...🌟From Vinayak Sir)
💥Maharashtra Academy For Civil Engineers🌟
*{IMP. Points}*
✨5 Days BOD is less than 4 days BOD keeping other conditions same.
✨If Biochemical oxygen demand(BOD) of a town is 20,000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is 400,000.
✨The rate of BOD exerted at any time is directly proportional to BOD remaining.
✨The ratio of 5 day BOD to ultimate BOD is about 2/3.
✨The minimum dissolved oxygen which should always be present in water in order to save aquatic life is 4 ppm.
✨The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is 100.
Dissolved oxygen in stream is maximum at noon.
✨Facultative bacteria are able to work in presence as well as in absence of oxygen.
✨The means of access for inspection and cleaning of sewer line is known as manhole.
✨Sewerage system is designed for maximum and minimum flow.
✨Lamp-Manholes:- Purpose Illuminating a Sewer Line.
✨Flushing Manholes:- Provided on Flat gradient where self cleaning velocity is reduced due to Flat profile.
✨Leaping Weir:-Separation of Storm Sewer & Sanitary Sewage.
✨Gully Trap:-Prov.at Junction of Sullage and Storm Water Basins.
✨Nahani Trap:-At the Head of each house drain.
✨P-Trap:- Water Closets.
✨Intercepting Trap:-Provided at Junction of House drain and Street Sewer
✨Vent Pipe:- Protects Trap Seal from Backflow.
✨Antisiphonage:-Preserves Water Seal in Trap
✨IDLING:-
When Automobiles give maximum unburned hydrocarbons it is called Idling
(...🌟From Vinayak Sir)
💥Maharashtra Academy For Civil Engineers🌟