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I am trying to understand the difference between storm sewer pipe that is designed by Mannings equation vs culvert design. Why can't we size a culvert using Mannings equation, considering that it is conveying flow from one end to other? Can someone explain?

I am evaluating an existing roadside ditch capacity for approx.2,100 ft length. The drainage area contributing to the ditch is a narrow section of roadside ditch area, and half of the pavement, so there is not much flow added. With the rational method, as the Time of Concentration increases, the...

When you specify a TDH for Vertical Turbine Pump (or provide TDH info to manufacturer), should it include the column and pump discharge head headlosses too OR the TDH should be at the discharge head connection and the manufacturer will add the losses from discharge head to pump bowl as pump...

I was looking for the answer what nicwong7 looking for and found the answers right here. Thanks guys. And Eng-tips rocks!!!

The purpose of reusing fruits waste is power generation.

good question. I shouldnt state TME non energy consuming. May be less energy consuming.

This is for solids fruits. Water will be added to make it flowable and pumpable by a PC pump, but it will not be like flow like wastewater passing through drum screen.

Is tank mixing eductor (TME)good for mixing wastewater eq tank. There is a screen upstream of the EQ basin but you never know what size solids pass through the system. Any potential clogging issues with the eductors in WW application? Feedback from design and/or experience would be appreciated...

I spoke w/ Franklin Miller. They said they can't meet. The requirement is for downstream MBR. I am wondering if a hammer mill with screen works.

need particle size less than 3mm. franklin miller, moyno, jwce says they cannot guarantee 3mm.

thread161-281892 With reference to processing of solids fruits wasate (apple, peach, cherry etc. with pits) can someone provide input on equipment that can grind/pulverize the referenced fruits into particles less than 3 mm? llamallama can you provide some input?

Need a system with a grinder for grinding/pulverizing fruits waste (apple, cherry, peach etc with pits). The particle size off the grinder shall be less than 3 mm. Is there any equipment out there that can guarantee the particle size of less than 3mm? Any input/suggestions/reference?

The flow is gravity flow, flow coming out of the belt filter. As such pumping and/or mixer is not involved. Adding chemical is not desired, since foaming is a continuous process when filter press is in operation. Water Spray is a good idea but the foaming issue is inside the pipe.

The plant is having issue with foam building up in a vertical pipe that carries filtrate from the belt filter press. The filtrate is collected in an above the ground tank. The vertical pipe is partially filled with water all the time since it is discharging the filtrate to the aboveground tank...

The flow has to be close to 150 gpm. Forgot to mention the application is wastewater (belt filter press wash water drain). Pipe type is ductile.

Variable water level in a tank over the time. Need to get a constant Discharge Q by use of a submersible pump (150 gpm). The flow discharge to atmosphere pressure. What flow/pressure control valve should I use? Any suggestions on piping configuration?

CT= CS+(CO-CS)e-KG(A/V)T KG=32.2x1.018(T-20)

I am trying to understand the calculations of air requirement for Post Aeration Tank based on Fick's Law that I found. Can someone decodify how the followings were calculated based on the data provided? Interfacial Area Between Gas and Liquid A/V Gas Transfer Coefficient KG Time Gas is in...

Is Mud Pump to pump out deposited silt an option?

Folks, Any suggestion on cleaning method of silt deposition in a raw water pump station. The intake has a 1 mm screen. The pump station wet well invert is 60 ft deep. Will a VAC truck able to pull the deposition out of the wet well? Install a mud pump?? The silt cannot be send back to the river...