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| | | Forum Newbie
Group: Forum Members
Last Login: 1/7/2008 2:10:24 PM
Posts: 1, Visits: 22 |
| | Are there any utilities that give a discount on the sewer charges because of water that evaporates in the business process? I have some large commercial laundries that claim that 15% or 25% of the water entering the facility is evaporated and does not enter the wastewater system - therefore the wastewater bill should be based on that reduced amount - not on the amount of water that goes through the meter. Are there utilities that provide this type of "evaporation credit"? Does your sewer ordinance or your set of regulations address these circumstances? Thanks! |
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| | | Supreme Being
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Last Login: Yesterday @ 6:54:02 PM
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| The Sanitation Districts of Los Angeles County in California does give almost any kind of credit that can be demonstrated. Laundries do in fact evaporate water in that the washed clothing, towels, sheets, etc. go into the dryers in a wet state, where all of that water is evaporated. I don't know what fraction of the purchased water, however, is in fact evaporated. That would probably vary, depending upon how wet the material is when it goes into the dryers, which would in of itself depend on what the fabric type is. Other equipment can also be allowed an evaporation credit, such as boilers, cooling towers, etc.
Jeff Naumann
(310) 540-0045
FAX (310) 540-0337
http://www.jeffnaumannassociates.com/ |
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| | | Supreme Being
Group: Forum Members
Last Login: 6/26/2008 4:01:08 PM
Posts: 156, Visits: 1,477 |
| | I think Jeff makes a good point about the water loss, but there is another factor you may need to consider : large commercial laundries also tend to discharge very hot water, at a high pH. One local village I know of used to get pHs of 10 - 11 in the collection system, and a temp. close to 200 deg. F. In another case, I know of a laundry that routinely dumps slug loads of solvents into the sewer system, whenever they wash the rags used to clean the printing presses of a regional newspaper. The impacts of these things at the "back end", may warrant surcharges that offset the savings in water usage. |
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| | | Supreme Being
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Last Login: 6/26/2008 9:18:16 PM
Posts: 372, Visits: 708 |
| | Jeff and John both make excellent points (as we've come to expect.) One other direction that could be considered is a flow meter on the discharge piping. This would give the utility a fairly accurate number upon which to bill sewer charges.
David |
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| | | Forum Newbie
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Last Login: 12/11/2007 12:07:38 PM
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| | If you use wastewater meters to measure the effluent from an industrial/commercial laundry, be aware of the limitations of the wastewater measuring device. The material in laundry effluent such as surfactants, other foaming agents, temperature,and flow variations can greatly impact the measuring capabilities of ultrasonic flow devices and mag meters. We have a comprehensive industrial effluent billing program and use wastewater meters in many industrial applications. Attaining accurate industrial laundry effluent flow measurements are one of our challenges. |
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