From what I've heard (and I'm not an expert), you want the grit chamber before the fine screen to minimize the wear on the mechanical apparatus of the fine screen.
This appears to be in general agreement with the post above.
Pumping is site specific. You need to select pumps capable of...
I'm using Excel 2007.
It is so weird. The formula doesn't act the same, depending on the mood of microsoft.
Sometimes it jumps me to the wrong cell, sometimes it tells me it can't open the file.
I inserted the hyperlinks manually. In the end it took less time than hunting for a solution online.
When I use the formula:
=HYPERLINK('SheetName!A8,"?")
The hyperlink works.
When I copy the formula to other cells, like this:
=HYPERLINK('SheetName!A200,"?")
and follow the hyperlink, it puts me back into cell A8, not cell A200.
Any ideas why?
I'm guessing you wouldn't use RO for that.
I'd start with looking at the size of the colloidal partical you want to remove and then select a membrane.
Possibly UF followed by RO?
Metcalf and Eddy method in the textbook is different than the method used by fine bubble diffuser manufacturers, which is the EPA method.
In any case, you need the following information:
-Basin dimensions
-AOR (oxygen demand) in this case you have what is called a step aeration process I think...
Can you use an equalization tank to take out the variable inlet flows and then run the system at a constant feed and bleed flow rate?
The control strategy woud include a constant feed flow and constant permeate rate, controlled with a control valve on the permeate and a vfd or control valve for...
For odor control, I think you have a couple options:
1. Aerate the EQ. There are lots of products out there for this, and if you're interested I can send you several different contacts.
2. Cover the EQ, and treat the offgas with an odor scrubber.
If the influent is pretty stinky, you won't...
NWRI guidelines required 80 mj/cm2 at 65% UVT for an application I worked with. I'm pretty sure that NWRI sets different requirements depending on if the wastewater is being used for re-use.
Just think about Net flow vs. gross instantaneous flow. The UF system should provide an average (net) flow, so as long as your transfer tank is large enough to handle the rise in level during filtration period and fall in level during backwash, you should be fine.
I recently worked on a pilot study testing an activated sludge system on RV waste - primarily because the existing septic system for the RV waste are failing. We were able to achieve good treatment with activated sludge.
Toxicity levels in RV waste weren't high enough to prevent biological...
Thanks guys... I guess what I'm looking for is literature in regards to limits for chloride solution concentration for austenitic stainless steel.
Something about the authority of print will work better for me than gr2vessels said so. Its interesting how much time I spend documenting things...
I'm interested in how I would prove that putting a .5 to 1% solution of sodium hypochlorite on 304 stainless steel for about 2-3 hours per month (CIP process) is not going to significantly affect the material.
I can look up chemical compatability charts, but I would like to know how this...
I know of an industrial pretreatment plant that had a similar problem. They searched for a source of zinc in the chemicals they used and couldn't find one. On a whim, the plant manager sent some tap water out for zinc testing and it came back out of limits. The city was using some kind of...
I'd talk about your career goals and why you want to work in the defense sector. I would leave out the part about why you want to work for them.
Also, I think its very important to interview the company as much as they interview you. Research them and ask them hard questions like, "where do...
I'd take the ABB job. I believe there is no substitute for field work for a new engineer and your learning is greatly accelerated in the field.
I would also plan on leaving that job in 1-2 years and follow a design engineering path.
Tell Allen Bradley that you want to get field experience...
I would clearly define your accomplishments and reasons for goals not being met. This is an opportunity to document to the managment the shortcomings that are out of your control. I would also offer solutions if possible.
Also, research what a design engineer in your industry makes. If this...
I'm designing some equipment to go in a coastal environment. Specifically, a simple equipment skid that supports pumps and blowers, etc. The skid is placed outdoors and is not subjected to chemicals, etc.
I'm trying to decide between SS316 and galvanized, or painted galvanized, etc.
Your...
I've used one in a pilot. I think it had about a 1.25" hose on it. I used it for wasting sludge from a bioreactor that had about 1% sludge. It worked ok. Because I was using it intermittently and it had sludge sitting in it the inlet hose before the pump rotating thing would have to be...
Here's my take:
You use ice to take advantage of the latent heat of melting. The temperature in the inside of the cooler should be zero C until all ice has melted.
Assumption: the R value of the insulation is >>> than the difference in convective heat transfer between the inside wall of the...
