A gravity settling tank is to be used to clean wastewater for an oil refinery. The wastewater contains 1% oil by volume as small droplets ranging from 100 to 1000 microns which will be removed from the water before the latter is to be discharged into the river. The tank is of rectangular section 2 ft wide by 4 ft deep with provisions for smooth continuous discharge of clean water and skimming off of oil at the surface of the discharge end. If 10,000 gal/min of wastewater is to be cleaned of oil droplets, calculate the length of the settling tank. The specific gravity of oil is 0.87. For water, p= 1000 and u= 1 cP. Round your answer to the nearest foot.

A gravity settling tank is to be used to clean wastewater for an oil refinery. The wastewater contains 1% oil by volume as small droplets ranging from 100 to 1000 microns which will be removed from the water before the latter is to be discharged into the river. The tank is of rectangular section 2 ft wide by 4 ft deep with provisions for smooth continuous discharge of clean water and skimming off of oil at the surface of the discharge end. If 10,000 gal/min of wastewater is to be cleaned of oil droplets, calculate the length of the settling tank. The specific gravity of oil is 0.87. For water, p= 1000 and u= 1 cP. Round your answer to the nearest foot.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Collection Systems

The collection systems form a part of sanitary engineering, which is a sub-branch of civil engineering. It is also known as public health engineering and wastewater engineering. It is a methodology followed to remove and properly dispose of human waste, along with creating systems to provide safe and clean usable water. These measures ensure a hygienic and disease-free community. Sanitary engineering, apart from building sewer disposal units, is also involved in plumbing, fire protection, hydraulics, life safety, environmental protection, information technology, microbiology, pathology, and so on.

Question

A gravity settling tank is to be used to clean wastewater for an oil refinery. The wastewater contains
1% oil by volume as small droplets ranging from 100 to 1000 microns which will be removed from
the water before the latter is to be discharged into the river. The tank is of rectangular section 2 ft
wide by 4 ft deep with provisions for smooth continuous discharge of clean water and skimming
off of oil at the surface of the discharge end. If 10,000 gal/min of wastewater is to be cleaned of
oil droplets, calculate the length of the settling tank. The specific gravity of oil is 0.87. For water,
p = 1000 and μ = 1 cP. Round your answer to the nearest foot.
kg
m²

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