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Hello, At our Water Treatment plant, we do have three filters- due media (Sand + Anthracite), each has four cells ( 15' X 15'). All tanks are due for structural inspection for corrosion. Also, there are few welds failed at the bottom of the tanks. To fix the tank's weld, all media requires to...

Hello. In our WTP , we have 13 HACH flow through turbidity meters. All are about to end of life. We estimated that all turbidity meters waste around 50m3 into sewer. I am looking for advice on if there is way to plumb device or insert type device available to stop wasting water. Thank you. R

Hello, Our water treatment plant has three filter. Plant design to pump back wash water from clear well after chlorine injection. Thus, plant had de chlor sytem prior to discharge to over land channel. My question - if we pull filter water without chlorine, what would be pro and cons? What...

Hello, Recently i moved to an organization. where they practice overland garden hose connection from neighbour property to supply the potable water in event of service connection failure. I do see deficiency in this practice. I was talking to other municipalties, they have simillar...

Hello, At our waster water treatment plant- in the filter tank, we have 4" and 6" PVC drain pipe penetration in the 8" thick concrete wall. PVC sleeves embedded in the concrete wall. Any suggestion to plug the PVC pipe penetration? process environments is secondary effluent. See attached...

Hello, We found the leak on 600mm watermain connect from underground wells to water reservoir. We do not know how big is the leak. and because it is on main we donot have more than a day to keep ground open. for that reason, we bought repair clamp and coupler in case. my question in this...

Hi, Exiting BNR WWTP has design capacity 14,000m3/d ADF. At plant we do see total daily flow 12000m3/day. There is no future potential to increase the flow which lead to increase the loading. Currently, the town collect around 2000 ton SSO (food waste). I am looking for the idea for how to...

Hello, WE do have BNR process at the plant. influent flow varies from 7000m3/d to 13000m3/d. One of the operation brought up idea of changing on cell of bio reactor to swing zone as plant has significant season variation. I have been searching to good case study to identify the favourable...

Hello, Thank you in advance fro your time. This is case in Federal land of Canada, We have water wells supplying water to Town for few decades. As part of disaster mitigation funding we are proposing to installed Diesel genset to supply power in emergency situations to water wells. Federal...

Hello, I am working on BNR WW plant. This plant is old, built in 88. It has duel media sand gravity filter to treat TSS 10 to 0.15 mg/l. I am looking for vendor or design build company who can offer the engineered technology in this area. Please share your information. Thank you for your...

We have 8 diameter tank to hold primary sludge. We are looking for sludge mixture to produce volatile fatty acid (VFAs) under anaerobic condition. Any suggestion on vertical mounted Vs submerged mixture. We had submerged mixture but it accumulate the sludge on the walls and not producing good...

Hello, I just need second thought here, We ran stress report for arbor coil, which sitting on manifold, to calculate stiffness requirements. Stress program we use carpipe. Stress induce by coil at manifold turn out to be 10 to 20 times than dead weigh to coil and fluid. Which is quick...

Hello, http://www.eng-tips.com/threadminder.cfm?pid=391 Thank you in advance for your time. I am middle of finalize the stanchion design temperature, would like how to come up with correct design temperature. Stanchion are position vertical, open to both end in atmosphere, thus inside of the...

Acoustical study of industrial process buildings recommend to have NRC (Noise Reduction coefficient) value =0.75 for Pre-engineered Metal Building Walls and Roofs. I could not find what would be the value of NCR for Standard metal building walls and roof system- Inside and outside liner with...

I am working on Process PreEngineerd Metal building. I came across explosion vent requirements from Code compliance reports and ELM(Engineer loss Management) reports. There are certain level of measure to void event of explosion. By this argument we submitted variance to safety officer. He...

Hello, What are different conceptual methods can be review to change columns from Tapered to Straight in PreEng building. Is it possible to reduce the column sizes significantly? Thanks,

All structural weld requires 100% visual inspection. Our subcontract shop and company CWB certify company. They are going to do structural field welding. As per code requirement welding shall be done by certified inspector or qualify or experienced person approved by engineer.as per W59...

Hello, Thank you in advance for you valuable time. Pre-Engineered Building Design Engineer do not agree to use crane attachment detail proposed by crane vendor supplier, C- channel on top of crane runway I-Beam. Building design Engineer argument : we have installed many crane rails on I-Beam...

Hello, I am developing Pre Eng Building Standard submittal log. It seems to me straight forward. some time it worth to have input. Thanks in advance for you input.

I am link between Architect structural engineer Engineer of Record and Pre Engineered Building structural Engineer. PreEng Building Structural Engineer provided column reaction to Architect EOR to finalize pile foundation design. What level of the detail Architect EOR need to review to accept...