Stone cutting /slurry
Stone cutting /slurry
(OP)
Anybody have experience treating water used for cutting granite stone. It is a small operation. I was thinking pretreatment with septic tanks and discharging to a pond. There is no municipal sanitary sewer on the site.





RE: Stone cutting /slurry
I don’t know what a septic tank would do, but a couple solid bottom conc. tanks in parallel might be a good idea. You could switch from one to the other, while you were treating/neutralizing and removing the solid contents of one of the tanks. Maybe these tanks should be wide enough to run a small skid steer front bucket machine into. I would take some of the water and fine solids to a testing lab and ask them to tell you what of the contents might get you in trouble with the EPA and the like. Then run the water into a settling basin for evaporation and settling into the soil and ground water system. I’m also not sure how you collect this sawing slurry, won’t it just end up down in the bottom of the pit, to settle out the fines and pump out the water? The rock is already there, the question is, when you turn it to dust and slurry by sawing, do you transform it to a more lethal form, that you have to clean up before release?
RE: Stone cutting /slurry
You probably only need a stilling basin and decanting system to pull clear water from the top. Concentrated sludge from the rock dust can then be spread on the ground to complete the drying and mixed with soil for stabilization.
RE: Stone cutting /slurry
Treatment of this type of wastewater would normally be handled by running the water through several tanks where the solids are allowed to settle out. Most of the solids will settle in the first tank. Make this tank large enough so that you can excavate the material out with a clamshell bucket.
The overflow water can be recycled back to the saw so that water discharge is minimized.
RE: Stone cutting /slurry
I am thinking to use a shallow tailing pond with turfs stone bottom that an excavator could feel when removing sediment. Overflow would be discharged through a weir to an enhanced swale containing check dams.
RE: Stone cutting /slurry
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Stone cutting /slurry
RE: Stone cutting /slurry
RE: Stone cutting /slurry
something like this but I think there are many suppliers http://www.uat.com.au/geobags.html or http://www.dewateringsolutions.net/geotubes.htm
Or you could use a cyclone to reduce your water content that you need to store and allow 90% to be discharged straight away. They are very effective with sand and gravel.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Stone cutting /slurry
http://water.epa.gov/type/groundwater/uic/class5/p...
If EPA is the agency, then consider a Class V Well. This is just a pond with a permeable bottom and maybe sides. The area/soils must “perc”, so the wetted area is based on GPM/sq. ft. of perc. rate, same as a septic system. It is a one page letter application with no testing requirement because there is no surface discharge. If you discharge directly to the well it would be hard to recover/reuse the water. You said “small”, I have done a well for a local (PA) one man operation.
Just for info, I have done quite a few for disposal of Fe/Mn waste generated by treating mining contaminated well water. Sort of nice to send in a plant permit application, with all the specs and drawings to the State permitting people, with an EPA attached letter that effectively removes the liquid/solids disposal system from the State purview.
Steve