Free settling rate of a sludge is 0.25 cm/min. Using an original height of 25 cm, the sludge settled to a height of 18 cm after the free‐settling period. The sludge was found to settle to a height of 10 cm after 110 min. This particular sludge was found to settle completely to a height of 4 cm. Calculate the time to settle to a height of 1/5 of its original height in a cylindrical tank whose diameter is 85% of its depth if it is 85% full. Consider 100 cubic feet of sludge in the tank.

Q: A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min. The…

A:

Q: The infiltration capacity of a soil follows the Horton's exponential model f = c₁ + C₂ e-kt. During…

A:

Q: for the constant hea permeability test set-u shown in the following figure, the followin…

A: L =30 mArea if specimen = 175 sq. cm.Constant head difference = 50 cmVolume of water collected in 5…

Q: Given: Flow rate of water = 500 L/min Suspended solids concentration in influent water = 100 mg/L…

A: As per guidelines, only first question is been solved.

Q: In a soil column study, a solute with a concentration of 1000 µg/mL is being pumped from the bottom…

A: To solve this problem, we need to use the advection-dispersion equation, which describes the…

Q: A two litre graduated cylinder was used to determine the Sludge Volume Index (SVI) of an activated…

A: Volume of cylinder: 2 litersSettled volume: 800 mlMLSS concentration =2800 mg/ltTo find SVI of…

Q: In order to clarify water containing particles with a diameter of 120 µm, what is used is a settling…

A:

Q: A completely mixed activated sludge process operating at equilibrium is designed to treat 300 MLD of…

A:

Q: In a constant head permeability test, if the discharge coming out of the sample is 0.35 cm³/s find…

A: Discharge Q=0.35 cm3/sLength L=30 cm,Area A=250 cm2Head loss per unit length i = 0.25Coefficient of…

Q: A settling chamber is to be used to collect particles with a density of 1200 kg/m3 from an air…

A: A settling chamber is to be used to collect particles with a density of 1200 kg/m3 from an air…

Q: Calculate the steady-state recharge rate, and find how long would it take for dissolved road salt to…

A: Given data: Hydraulic conductivity, k(z)=0.5+0.03z Porosity, n=0.23 Depth of unconfined aquifer=-11m…

Q: In a constant head permeability test, if the discharge coming out of the sample is 0.35 cm³/s find…

A: Discharge Q=0.35 cm3/sLength L=30 cm,Area A=250 cm2Head loss per unit length i = 0.25Coefficient of…

Q: A 4-cell aquifer model is conceptualized in the figure below. Cell 1 River Cell 2 Cell 3 Cell 4 (a)…

A: width of the aquifer strip = 3 km  length of each cell = 5km recharge rates - aquifer strip in cell…

Q: Flow velocity of water 1.25 cm/sec is observed in a continuous flow settling tank 4.5 m deep and 60…

A:

Q: An anaerobic digester is operated with a hydraulic retention time (HRT) of 25 d and a flow rate of…

A:

Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.