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The small sewers are cleaned by
Jetters are high-efficiency machines and the most common solution used today for cleaning sewers. They propel spray through a hose and out a specialized rotating nozzle to clean and break-up debris. Water jetting is a safe, chemical-free process that does not damage pipes.
Jetters are high-efficiency machines and the most common solution used today for cleaning sewers. They propel spray through a hose and out a specialized rotating nozzle to clean and break-up debris. Water jetting is a safe, chemical-free process that does not damage pipes.
See lessThe small sewers are cleaned by
Jetters are high-efficiency machines and the most common solution used today for cleaning sewers. They propel spray through a hose and out a specialized rotating nozzle to clean and break-up debris. Water jetting is a safe, chemical-free process that does not damage pipes.
Jetters are high-efficiency machines and the most common solution used today for cleaning sewers. They propel spray through a hose and out a specialized rotating nozzle to clean and break-up debris. Water jetting is a safe, chemical-free process that does not damage pipes.
See lessFresh sewage may become stale in
Colour: Fresh sewage is light brownish-grey color. The old sewage is converted to black or dark brown due to anaerobic activities, known as stale or septic color.
Colour: Fresh sewage is light brownish-grey color. The old sewage is converted to black or dark brown due to anaerobic activities, known as stale or septic color.
See lessThe detention period for plain sedimentation water tanks, is usually
Some design Parameters for Plain sedimentation tanks are: 1. Detention period: In water sedimentation tank using coagulated raw supplies is 2 to 4 hour
Some design Parameters for Plain sedimentation tanks are: 1. Detention period: In water sedimentation tank using coagulated raw supplies is 2 to 4 hour
See lessThe drainage area of a town is 12 hectares. Its 40% area is hard pavement (K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula the maximum run off is
Given, time of concentration (t) =30 min and also use the given formula for finding Intensity of Rainfall (Pc). Pc = 900 / (30+60) = 10 mm/hr = 1 cm/hr. Now, Use the rational formula for finding Quantity of storm run-off (Q). Q = (K*Pc*A)/36, = (0.45*1*12)/36, = 0.15 cumecs.
Given, time of concentration (t) =30 min and also use the given formula for finding Intensity of Rainfall (Pc).
Pc = 900 / (30+60) = 10 mm/hr = 1 cm/hr.
Now, Use the rational formula for finding Quantity of storm run-off (Q).
Q = (K*Pc*A)/36,
See less= (0.45*1*12)/36,
= 0.15 cumecs.
The effluent of a septic tank is
In conventional, or soil-based systems, the liquid (known as effluent) is discharged from the septic tank into a series of perforated pipes buried in a leach field, chambers, or other special units designed to slowly release the effluent into the soil. This area is known as the drainfield.
In conventional, or soil-based systems, the liquid (known as effluent) is discharged from the septic tank into a series of perforated pipes buried in a leach field, chambers, or other special units designed to slowly release the effluent into the soil. This area is known as the drainfield.
See lessA sewer running partially full and hurried with back filled, fails in compression due to
Ventilation of Sewers: Sewers are not designed to run full. Sewers are always designed to flow half or three- fourth for the purpose of ventilation of foul gases.
Ventilation of Sewers:
Sewers are not designed to run full. Sewers are always designed to flow half or three- fourth for the purpose of ventilation of foul gases.
See lessThe sewage omits offensive odours after four hours
The most characteristics odour of stale or septic waste water is that of hydrogen sulphide, which is produced by anaerobic microorganisms that reduce sulphates to sulphide. 4. Turbidity: The turbidity of sewage is very high as compared to raw water.8 Mar 2021
The most characteristics odour of stale or septic waste water is that of hydrogen sulphide, which is produced by anaerobic microorganisms that reduce sulphates to sulphide. 4. Turbidity: The turbidity of sewage is very high as compared to raw water.8 Mar 2021
See lessTo prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is
(ii) It is defined as the minimum velocity at which sewage should flows such that there is no deposition or accumulation of particles along the drain length. The self-cleansing velocity for all sewer in India is 1 m/Sec to 1.2 m/Sec.
(ii) It is defined as the minimum velocity at which sewage should flows such that there is no deposition or accumulation of particles along the drain length. The self-cleansing velocity for all sewer in India is 1 m/Sec to 1.2 m/Sec.
See lessIn sewers the gas generally found, is
Highly toxic components of sewer gas include hydrogen sulfide and ammonia. Sewer gas also contains: Carbon dioxide. Methane.
Highly toxic components of sewer gas include hydrogen sulfide and ammonia. Sewer gas also contains: Carbon dioxide. Methane.
See less