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Hydraulic mean radius is
The hydraulic radius is defined as the ratio of the cross-sectional area (S) of the flow channel to the length of the wetted perimeter (L) of the flow channel in contact with the fluid:(5.33)dh=4rh=4SL.
The hydraulic radius is defined as the ratio of the cross-sectional area (S) of the flow channel to the length of the wetted perimeter (L) of the flow channel in contact with the fluid:(5.33)dh=4rh=4SL.
See lessFor trunk and out-fall, the type of sewers generally used, is
Horseshoe-shaped sewer may be used for large sewer discharge, such as for trunk and outfall sewer.
Horseshoe-shaped sewer may be used for large sewer discharge, such as for trunk and outfall sewer.
See lessThe process of burning the screenings
Screens are used to stop the flow of larger particles like paper, feces, garbage, leaves, etc. These are removed by raking and disposal is done by incineration as it may produce high calorific value.
Screens are used to stop the flow of larger particles like paper, feces, garbage, leaves, etc. These are removed by raking and disposal is done by incineration as it may produce high calorific value.
See lessThe recommended detention period for grit chambers is
40 - 60 sec Detailed Solution Units Detention time Grit chamber 40 - 60 sec Detritus tanks 3 - 4 min Primary sedimentation tank 2 - 2.5 hrs Secondary sedimentation tank 1.5 - 2 hrs
40 – 60 sec
See lessDetailed Solution
Units Detention time
Grit chamber 40 – 60 sec
Detritus tanks 3 – 4 min
Primary sedimentation tank 2 – 2.5 hrs
Secondary sedimentation tank 1.5 – 2 hrs
The algae dies out in the zone of
ZONE OF DEGRADATION: This usually occurs below the output sewer when discharging its contents into the stream. The zone is characterized by water becoming dark and turbid with the formation of sludge deposits on the bottom, algae dies in this zone. Dissolved oxygen gets reduced to 40%
ZONE OF DEGRADATION: This usually occurs below the output sewer when discharging its contents into the stream. The zone is characterized by water becoming dark and turbid with the formation of sludge deposits on the bottom, algae dies in this zone. Dissolved oxygen gets reduced to 40%
See lessThe ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is
For a circular pipe, the hydraulic diameter is equal to the diameter of the pipe. For a square pipe, the hydraulic diameter is equal to the side length of the square divided by $\sqrt{4/\pi}$, which is approximately equal to 1.095.
For a circular pipe, the hydraulic diameter is equal to the diameter of the pipe. For a square pipe, the hydraulic diameter is equal to the side length of the square divided by $\sqrt{4/\pi}$, which is approximately equal to 1.095.
See lessThe sewer pipe which carries sewage from a building for immediate disposal is
House Sewer: A pipe carrying water waste from a building to the immediate point of its disposal is called a house sewer. Lateral or Branch Sewer: Lateral sewers from the first element of a wastewater collection system. They are used to collect wastewater from one or more building sewers and convey iRead more
House Sewer: A pipe carrying water waste from a building to the immediate point of its disposal is called a house sewer. Lateral or Branch Sewer: Lateral sewers from the first element of a wastewater collection system. They are used to collect wastewater from one or more building sewers and convey it to the main sewer.
See lessIn septic tanks,
A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic sewage treatment. Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primaryRead more
A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic sewage treatment. Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as “primary treatment”)
See lessWho protects the environment?
The ozone layer in the stratosphere absorbs a portion of the radiation from the sun, preventing it from reaching the planet's surface. Most importantly, it absorbs the portion of UV light called UVB. UVB is a kind of ultraviolet light from the sun (and sun lamps) that has several harmful effects.
The ozone layer in the stratosphere absorbs a portion of the radiation from the sun, preventing it from reaching the planet’s surface. Most importantly, it absorbs the portion of UV light called UVB. UVB is a kind of ultraviolet light from the sun (and sun lamps) that has several harmful effects.
See lessWhat is the ozone limit?
Ozone is a molecule made up of three oxygen atoms, often referenced as O3. Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons.
Ozone is a molecule made up of three oxygen atoms, often referenced as O3. Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons.
See less