I design medium pressure (5-85 psi) distribution gas lines at industrial facilities, following CSA Z662 and B149.1. The scope is usually from pressure reducing station to 10-15 feet from the buidling of the end user (upstream of PRV).
Typically the sizing is below 10" and I used MDPE or HPDE...
Looking for some help on definition terminology.
In a document on laterite roads the following data is presented
Base properties
PI = 15, P425 = 48; PM = 720
CBRs @ 98% BS Heavy = 24%
Cum. Traffic to end 2003 = 0.28 MESA
My question -
1) P425 represent a fraction but on what scale. is this...
I'm studying for my PE exam in Geotechnical Materials and Analysis and have come across a problem that I seem to be able to do the first part but a bit confused on the second. The abridged question is this
Need to fill a volume of 2100 m3 using material to be taken from one of two borrow pits...
I have a design for a potable water system using pvc sched 40 solvent welded pipe.
ASME B31.3 page 104 A345.4.2 reference test pressure of 1.5 times design pressure.
Design pressure is about 100 psi based on the pump supply curve. The downstream distribution system has pressure reducers as...
I've been in civil engineering for 20+ years and during that time have danced around water/wastewater treatment and general infrastructure.
I'm both impressed and jealous of the water treatment knowledge some of the posters on this website.
Having recently started to gravitate to more water...
Greetings
Based on the following equation taken from Water Treatment - Principles and Design (2nd Edition)
4Fe(HCO3)2 + O2 + H2O >>> 4Fe(OH)3 + 8CO2
I'm trying to figure out how Alkalinity used (mg/ mg Fe) of 1.8 was calculated.
I can see how oxidant needed of 0.14 mg/mg Fe was calculated...
Greetings
Based on the following equation taken from Water Treatment - Principles and Design (2nd Edition)
4Fe(HCO3)2 + O2 + H2O >>> 4Fe(OH)3 + 8CO2
I'm trying to figure out how Alkalinity used (mg/ mg Fe) of 1.8 was calculated.
I can see how oxidant needed of 0.14 mg/mg Fe was calculated...
Are the O2 levels in brine lower then those in fresh water at a given temperature simply because the increased TDS of the brine prevents more oxygen from binding to other molecules?
Kevin
I'm looking for decibel ratings for NEMA motors to compare a 600 kw tefc to WP1 enclosure.
If NEMA has a maximum rating for all motors that would be fine as well.
For those needing more information on why I'm asking. Its for a pumping station design where I think 600kw tefc will be too...
I have two produced water streams (2500 and 8500 gpm) containing oil which has been previously de-aerated to remove oxygen.
The water is reused in the process after passing through the oil separator and to avoid having to de-aerate the streams again I was looking for a manufacturer of API oil...
I want to check a coversion from ppm to ml/l.
Material O2 - Oxygen Density 1.429 kg/m3....1.429 mg/ml
Quantity 0.3 ppm O2 which is equal to 0.3 mg/kg
Math 0.3 mg/kg divided by 1.429 mg/ml = 0.2 ml/kg
Problem - reference I'm using shows the coversion to be 0.2 ml/l How is ml/kg converted...
Some guidence would be great on this one.
I have two brine waste streams (2500 and 8400 gpm pH about 8.4, 30% TDS, Temp 65C, Alkalinity 350 ppm as CaCO3, though Alk could be higer) to be pumped below ground in carbon steel pipe. Life of pipe about 20-30 years
From these streams I intend to...
I have a waste stream that requires oil separation followed by CO2 and O2 removal. I started by looking at individual processes for each but a search of this board and it appears I may be able to combine oil and CO2 removal using a DAF unit installed within a oil separater. Venders seem...
It seems to be an age old question; Does dying water darker help with evaporation?
My gut feeling is no because the latent heat required for water evaporation remains unchanged even with colored water.
However absorded light increase latent heat thereby warming the water and increasing...
I'm reviewing options for removing dissolved oxygen from a brine waste stream (25% solids) to prevent possible downstream corrossion or bio issues.
What would be the best chemical for this application? I've seen reference to sulphide.
Any help on a balance equation for commention DO removal...
I have been opening *.inp files within exel to make various edits. I can do the edits within EPANET2 but excel would be quicker.
The problem is when I save it as a tab deliniated file and try to bring it back into EPANET2 (file open or file import network) I get an error message "List Index...
I'm designing a small water treatment plant (150 m3/day) to remove Mn and Fe (very low levels in ground water source) using sodium hyplochlorite followed by greensand pressure filter.
To reactivate the filters I intend on using a 100 mg/L solution of NaOCl as per the green sand vendors...
I'm designing a small water treatment plant (150 m3/day) to remove Mn and Fe (very low levels in ground water source) using sodium hyplochlorite followed by greensand pressure filter.
To reactivate the filters I intend on using a 100 mg/L solution of NaOCl as per the green sand vendors...
I'm doing a preliminary selection on process units for the removal of BTEX contaminents (Benzene, Toluene, Ethyl-Benzene, and Xylene) from a potential groundwater source.
The recorded levels have been actually been below the drinking water standards. So why am I considering treating it? Well...
