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re: Need the brains of the OB

Posted on 10/29/13 at 9:04 pm to
Posted by Capt ST
High Plains
Member since Aug 2011
13665 posts
Posted on 10/29/13 at 9:04 pm to
So you're just handling filter bed? Aerating thru perforated pipe?
Posted by Nodust
Member since Aug 2010
22802 posts
Posted on 10/29/13 at 9:05 pm to
quote:

However if it doesn't keep up you need a sensor to open the main drain on the overflow bucket to keep it from overfilling.

I still don't see the need of a sensor. Just let it spill over the side of the overflow drain. That way you will maximize the amount allowed to go through the perforated pipe just holding the optimal level on the filter media.

This is how a golf green is made. Sand, then pea gravel, then perforated pipe in the pea gravel. The interface between the courser pea gravel and sand hold water for the roots of the grass. But in times of heavy rain the water column rises causing a flushing action causing the water to push into the pea gravel. Different size of sand and gravel will hold a higher water column before the flushing action occurs.
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 10/29/13 at 9:06 pm to
Water trickles down to that and discharges
Posted by Meauxjeaux
102836 posts including my alters
Member since Jun 2005
46854 posts
Posted on 10/29/13 at 9:11 pm to


In case you missed it on my edited post.
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 10/29/13 at 9:15 pm to
Best case scenario, we find a way to not discharge excess runoff(overflow). Would be optimal to run it back through the beginning somehow. Could be as simple as a retention pond prior o the filter. Some kind of regulator on the retention pond into the bed

Our goal is to design a cheap system using no energy. A lot of this requires a gradient to simply use gravity. Throwing in a retntion pond would add vertical distance we might not have
This post was edited on 10/29/13 at 9:19 pm
Posted by GREENHEAD22
Member since Nov 2009
20843 posts
Posted on 10/29/13 at 9:17 pm to
You need a high level sensor on that overflow bucket to open its drain or you will have a vessel overflow and contamination.
Posted by D500MAG
Oklahoma
Member since Oct 2010
3988 posts
Posted on 10/29/13 at 9:19 pm to
if you have access to power----

one of these on bottom discharge
valve

with one leg wired through one of these in overflow "catch"
float switch
Posted by Capt ST
High Plains
Member since Aug 2011
13665 posts
Posted on 10/29/13 at 9:21 pm to
If its wastewater application you have to consider what you're allowing into your system, really can't stress enough the need for strainers for your untreated effluent. I've seen first hand what gets caught in the valves and it isn't pretty. Much easier to clean strainer than to untangle condoms and tampons from valve stems.
Posted by Meauxjeaux
102836 posts including my alters
Member since Jun 2005
46854 posts
Posted on 10/29/13 at 9:21 pm to
If you mean contamination back into the perforated pipe, there are a bunch of check valve solutions that could be added at the outflow of the perforated pipe into the overflow pipe.

Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 10/29/13 at 9:21 pm to
Storm water runoff
Posted by Nodust
Member since Aug 2010
22802 posts
Posted on 10/29/13 at 9:21 pm to
Overflow would need to be collected and recycled back around. Rerun it during times of lower flow when the filter can handle extra.
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 10/29/13 at 9:22 pm to
Exactly

That's the best case scenario

Now we need to figure out how to with no power
Posted by D500MAG
Oklahoma
Member since Oct 2010
3988 posts
Posted on 10/29/13 at 9:23 pm to
what kind of volume are you expecting ?
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 10/29/13 at 9:25 pm to
We need to do some calls for sizing but will depend on filter bed depth and material infiltration

But this will be for say parking lot and subdivisions for example

1/4 inch of rain over half acre parking lot is beaucoup water though
This post was edited on 10/29/13 at 9:26 pm
Posted by D500MAG
Oklahoma
Member since Oct 2010
3988 posts
Posted on 10/29/13 at 9:26 pm to
solar power out of question ?
Posted by GREENHEAD22
Member since Nov 2009
20843 posts
Posted on 10/29/13 at 9:26 pm to
Got ya, then yae just run it to a retention tank. I am equating this to what I know, oil production, everything needs sensors and alarms.
Posted by Nodust
Member since Aug 2010
22802 posts
Posted on 10/29/13 at 9:26 pm to
quote:

Now we need to figure out how to with no power


Best bet would be keep it from getting to the filter. Use a float like used on cattle water troughs for the inlet of the filter. When the water raises the float, flow is cut off. Just make sure you have enough holding capacity upstream of the filter.
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 10/29/13 at 9:27 pm to
Not totally. But will increase initial and O and M costs

But if we could treat overflow excess, might be worth it
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 10/29/13 at 9:28 pm to
Yea regulating inflow is the best option thus far
Posted by Nodust
Member since Aug 2010
22802 posts
Posted on 10/29/13 at 9:29 pm to
Even so, you will still need an overflow prevention device. Maybe a smaller filter connected to the overflow line. It may not clean it as good but should blend out with the clean treated water and be enough to release.
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