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| | | Supreme Being
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Last Login: Today @ 3:48:31 PM
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| | What is the average BOD and TSS from a prison. We have been getting 380mg/l BOD and 342mg/l TSS and a flow of 0.24mgd. For many years the prison has been given price breaks because they were trying to bring down their loading, but now we are holding them to the rate structure. BOD $0.70/lbs, TSS $0.80/ lbs and flow (748 gallons) $0.80. Every one in town had their rate double, but the prison trippled because they had never paid the full price. So, anyone think the BOD or TSS numbers are out of line? Also, the prison runs a commercial laundry that takes in flour sacks now and then. Depending on what numbers are used to calculate domestic loading, the prison produces the loading of 5000 people, but...there are only 1600 inmates. Long story short, I think we are fair, they don't. |
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| | | Supreme Being
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| | Tchobanoglous and burton in 1991 rated prison hydraulic load as 80-150gal /day per inmate and 5-15 gals per day per staff member.BOD per capita should be in the normal range of 0.11-0.26 lbs /day /capita notwithstanding the issue of the flour bags. This should allow you to some claculations. Regards TerryF |
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| | | Supreme Being
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Last Login: 6/26/2008 4:01:08 PM
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| | Have dealt with several prisons and similar institutions over the years, and would not be surprised by any particular loading. Problems observed include: decisions to shut down pre-treatment (bar screens), so that all sorts of stuff comes down the pipe - kitchen wastes such as oranges and peelings, etc; even with screens, loadings of plastics (the little packets that condiments come in); in one case, involving a youth center (read: reform school) the entire influent pipe was jammed for 10 feet, with bunched up sheets (the game is that the "clients" would try and cause their room to flood, just to bust the horns of the guards, and force them to move them to a new room); large spikes in flow, since everyone eats, showers, etc., at the same time. The prisons have also often gone to ultra-low flush toilets, which removes a lot of dilution from the BOD and solids. Another factor to consider is whether or not there are any other "industrial" processes taking place - whether it is stamping out license plates, wood shops, other vocational training, etc. Some have their own farm operations, to supplement the diet, so there may be food processing as well. You'll need to talk to someone in administration, to find out. Hope this helps some. |
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| | | Supreme Being
Group: Forum Members
Last Login: Today @ 3:48:31 PM
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| | Terry and John, Thanks for the replies. Mark |
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