The
manufacturing of oriented strand board (OSB) consumes remarkably little
water compared to other industrial uses of the forest biomass such as
ethanol or "green" diesel production. Actually, modern OSB manufacturing
technology reduces the amount of water consumed to approximately 12
gallons of non potable industrial water per ton of low value small
diameter logs transformed in high value added oriented strand board
(OSB).
Arizona Forest
Restoration Products anticipates to consume daily approximately 34,000
gallons of non potable industrial water. This water will
be reclaimed water procured from the Winslow Water Treatment Plant
(preferably), or non-potable water pumped on site from a 175 foot well
to the surface aquifer.
According to the American Water Works Association, the average
household uses 350 gallons of water a day (http://www.pathnet.org/sp.asp?id=1671),
so in term of impact on the overall Northern Arizona water resources,
the Arizona Forest
Restoration Products' plant will consume daily the equivalent of 97
households, or in other words only about 60% of the
55,000 gallons that the households of its 156 employees will consume.
This is remarkably low.
To put things in perspective, the 97 households equivalent represented
by the consumption of the Arizona Forest Restoration Products plant
represent only 6% of the consumption of the 1,624 households built
within the City of Flagstaff alone for the period of January to
September 2006 (344 single family units + 256 units of 5 or more
families)
Source:
City of Flagstaff, Monthly Statistical Report, September 2006.
|
Utilization |
Unit |
Volume |
|
|
|
|
|
Fire Water Delivery (reference only) |
|
|
|
Existing Plant Fire Protection reserve |
gal |
300,000 |
|
Peak Flow (Emergency Only) to be verified |
gpm |
2,500 |
|
Make-Up Water Flow Rate After Major Event |
gpm |
120 |
|
Hours to fill one tank - from empty |
hours |
42 |
|
Volume of water in u/g fire water pipe main ring |
gal |
18,359 |
|
|
|
|
|
Process Equipment Fire Water Demand (reference only) |
|
|
|
Energy System Flange Cooling |
|
|
|
Usage - residual water to sump |
gal/wk |
20,160 |
|
Peak Flow (Emergency Only) |
gpm |
2 |
|
Energy System Fire Water for Fuel Feed Ram Cooling |
|
|
|
Peak Flow (Emergency Only) |
gpm |
100 |
|
Energy System - Fire Water for Thermal Oil Heat Exchange |
|
|
|
Peak Flow (Emergency Only) |
gpm |
80 |
|
Energy System -Fire Water for Emergency Cooler |
|
|
|
Peak Flow (Emergency Only) |
gpm |
50 |
|
|
|
|
|
Plant Process Water - Non Continuous Usages |
|
|
|
E-Wax System Line Cleaning |
|
|
|
Usage - residual water to sump |
gal/wk |
113 |
|
Peak Flow |
gpm |
15 |
|
In-Blender High Pressure Cleaning |
|
|
|
Usage - |
gal/wk |
100 |
|
Peak Flow |
gpm |
15 |
|
In-Line Caul High Pressure Cleaning |
|
|
|
Usage - residual water to sump |
gal/wk |
1,200 |
|
Peak Flow |
gpm |
10 |
|
Caul Cleaning - Manual Cleaning |
|
|
|
Usage - residual water to sump |
gal/wk |
1,800 |
|
Peak Flow |
gpm |
15 |
|
Press Exhaust Treatment System (RCO) - Manual Cleaning |
|
|
|
Volume for Clean-up - One time event |
gal/wk |
17 |
|
Peak Flow |
gpm |
30 |
|
Wash Down |
|
|
|
Usage - residual water to sump 20% evaporated to atmosphere |
gal/wk |
2,520 |
|
Peak Flow (Maintenance day clean-up only) |
gpm |
15 |
|
Mobile Equip Wash Bay |
|
|
|
Usage - residual water to sump 20% evaporated to atmosphere |
gal/wk |
3,150 |
|
Peak Flow |
gpm |
15 |
|
Strander Knife Change High Pressure Wash |
|
|
|
Usage - no residual water |
gal/day |
65 |
|
Peak Flow |
gpm |
11 |
|
Emergency Shower & Eye Wash |
|
|
|
Peak Flow (Emergency Only) |
gpm |
20 |
|
|
|
|
|
Plant Process Water - Continuous Usages |
|
|
|
Energy System Ash Wetting |
|
|
|
Usage - no residual water |
gal/day |
4,320* |
|
Peak Flow |
gpm |
3 |
|
Strander Knife Wetting |
|
|
|
Usage - no residual water |
gal/day |
12,885 |
|
Peak Flow |
gpm |
9 |
|
WESP - Dryer Emission Control |
|
|
|
Usage - 1gpm residual water to holding pond |
gal/day |
82,800 |
|
Peak Flow |
gpm |
215 |
|
Energy System - Water for Urea Injection |
|
|
|
Usage - no residual water |
gal/day |
14,400 |
|
Peak Flow |
gpm |
10 |
|
Finishing Line |
|
|
|
Usage - no residual water |
gal/day |
130 |
|
Peak Flow |
gpm |
15 |
|
|
|
|
|
Plant Process Water Demand |
|
|
|
Plant Process Water Consumption |
|
|
|
Total Residual Process Water Consumption |
gal/day |
84,071 |
|
“Close Circuit” Utilization (~95%) |
gal/day |
79,868 |
|
Evaporation & others Loss (~5%) |
gal/day |
4,204 |
|
Total Non Residual Process Water Consumption |
|
31,800 |
|
Total Process Water Demand per Day |
gal/day |
36,004* |
|
|
|
|
|
Plant Domestic Water Demand |
|
|
|
Peak Domestic Flow Rate |
gal/min |
74 |
|
Steady State Domestic Flow Rate |
gal/min |
2.0 |
|
Total Domestic Water Demand per Day |
gal/day |
2,800 |
*:
Varies based on the amount of on-site biomass supplied to a local
go-generation plant. Actual
consumption is
expected to be at least 2,000 gallons less than maximum listed.
