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Haintenance Labor
Power
Utilities
Tot~l Operation Cost
TARLE III/10
(Continued)
~1ETALLIC ION ADDITION - SECONDARY TREATIlENT
Plant Layout
$ S,OOO/year
3,000
1,000
$ 43,OOO/year
111/31
Chemical additions would be similar to primary addition as shown on Figure
111/3 Chemical additions must be adjustable for optimum removals.
Both ferric chloride and alum react almost instantaneously with the dissolved
phosphorus. However, there is a critical reaction time prior to
the addition of polymers. Also, prote~tion of the biological sludge must
be considered. In general; chemical additions should be made near the
end of the aeration process.
Construction Cost
New facilities would be equal to that described for primary addition.
These costs were shm,'ln in Table 111/9 •
Chemical Cost
Primary 'settling does remove some phosphorus through adsorption and
sedimentation. For this reason, a ten percent reduction in alum and
ferric chloride costs is assumed from that required in primary treatment.
The acid and_ polymer costs ,,,ould be unchanged. Therefore, the
chemical cost for ferric chloride and alum treatment in the secondary
stage would be $2280 and $3000 per day, respectively.
Object Description
| Title | Master plan for sewers (pt. 3) |
| Alternative Title | Water pollution control plant |
| Contributor |
Henry B. Steeg & Associates Fort Wayne (Ind.). Board of Public Works |
| Topic | Public Utilities |
| Subject | Sewage disposal--Indiana--Fort Wayne |
| Geographical Coverage | Fort Wayne, Indiana |
| Date of Original | January 1972 |
| Time Period | 1900-1999 |
| Source | Print version: Master plan for sewers. Pt. 3: Water pollution control plant. (Indianapolis, Ind.: Henry B. Steeg & Associates, 1972), 1 v. |
| Additional Availability | Print version might be available at IPFW Helmke Library. See online catalog. |
| Relation | Third of three parts of Master plan for sewer. Pt. 1, Relief sewers, digital barcode is 30000126499916; Pt. 2, Sanitary sewers, digital barcode is 30000126499924; |
| Rights | Copyright Indiana University-Purdue University Fort Wayne, 2006- . All rights reserved. May not be reproduced without permission. For information regarding reproduction and use see: http://cdm16776.contentdm.oclc.org/cdm/about/collection/p16776coll1/ |
| Date Digitally Created | April 17 2012 |
| Digital Publisher | Walter E. Helmke Library, Indiana University-Purdue University Fort Wayne |
| Digitization Specifications | This pdf file was derived from 400 dpi, 1-bit, uncompressed TIFF images that were scanned from the originals using a Fujitsu 5750C scanner with Adobe Acrobat 9.0 Professional scanning software, black and white configuration. |
| Content Type | Text |
| Digital Format | text/pdf |
| Collection | Fort Wayne Area Government Information |
| Identifier | 30000126499932 |
| File Name | 30000126499932.pdf |
Description
| Title | Page 112 |
| Transcript | Haintenance Labor Power Utilities Tot~l Operation Cost TARLE III/10 (Continued) ~1ETALLIC ION ADDITION - SECONDARY TREATIlENT Plant Layout $ S,OOO/year 3,000 1,000 $ 43,OOO/year 111/31 Chemical additions would be similar to primary addition as shown on Figure 111/3 Chemical additions must be adjustable for optimum removals. Both ferric chloride and alum react almost instantaneously with the dissolved phosphorus. However, there is a critical reaction time prior to the addition of polymers. Also, prote~tion of the biological sludge must be considered. In general; chemical additions should be made near the end of the aeration process. Construction Cost New facilities would be equal to that described for primary addition. These costs were shm,'ln in Table 111/9 • Chemical Cost Primary 'settling does remove some phosphorus through adsorption and sedimentation. For this reason, a ten percent reduction in alum and ferric chloride costs is assumed from that required in primary treatment. The acid and_ polymer costs ,,,ould be unchanged. Therefore, the chemical cost for ferric chloride and alum treatment in the secondary stage would be $2280 and $3000 per day, respectively. |
