Main Title |
Removal of phosphates and metals from sewage sludge / |
Author |
Scott, Dana S.
|
Other Authors |
|
CORP Author |
Canada. Department of the Environment. |
Publisher |
Environmental Protection Service, Environment Canada, |
Year Published |
1973 |
OCLC Number |
02206778 |
Subjects |
Sewage sludge ;
Sewage--Purification ;
Water treatment plant residuals
|
Additional Subjects |
Metals ;
Phosphates ;
Separation Techniques ;
Sewage Sludge
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJAM |
TD769.S350 |
|
Region 3 Library/Philadelphia, PA |
04/23/1999 |
DISPERSAL |
EJBM |
TD769.S350 |
|
Headquarters Library/Washington,DC |
02/28/2007 |
ELBM |
TD769.S350 1973 |
|
AWBERC Library/Cincinnati,OH |
07/18/2023 |
|
Collation |
vii, 55 pages : illustrations, graphs ; 28 cm |
Notes |
Includes bibliographical references (pages 54-55). |
Contents Notes |
Most of the metals and phosphorus in either unconditioned or conditioned final anaerobically digested sludges can be readily extracted y acid. The acid extract can be neutralized under controlled conditions of pH to yield a solid product low in organic material containing mostly .r on and aluminum phosphates. By proper control of pH, it is possible to produce two solid products, one containing most of the iron and aluminum, and one containing most of the heavy metals. Iron and phosphate can be separated and recovered from the crude inorganic product by known solvent extraction technology, or by alkali treatment. Costs are such that if metals and phosphates are removed from a sludge, then ft is profitable to recover and recycle the iron and phosphate from the crude inorganic product. However, the value of recovered metals and phosphates is not sufficient to bear the cast of the entire process. On peut facilement extraire par un acide la plus grande partie des métaux et du phosphore pršents dans les boues finales, digéres en anaérobiose, qu'elles aient été conditionnes ou non. L'extrait acide peut ãetre neutralisé, dans les conditions voulues de pH, pour donner un mélange solide, áa faible teneur en matières organiques, et contenant surtout des phosphates de fer et d'aluminium. Par réglage convenable du pH, on peut obtenir deux produits solides, le premier contenant la plus grande partie du fer et de l'aluminium, l'autre, la plus grande partie des métaux lourds. On peut séparer et rcupérer le fer et les phosphates du produit minéral brut, en faisant appel aux techniques connues d'extraction par solvant, ou par traitement áa la soude. Les coãuts font que, si les métaux et les phosphates sont retirš d'une boue, il est alors profitable de rcupérer et de recycler le fer et les phosphates du produit minéral brut. Toutefois, la valeur des métaux et des phosphates rcupérš n'est pas de nature áa neutraliser le coãut d'exploitation de tout le procédé. |
Place Published |
Ottawa, Ont. |
Corporate Au Added Ent |
Canada. Environment Canada. |
Title Ser Add Ent |
Research program for the abatement of municipal pollution under provisions of the Canada-Ontario agreement on Great Lakes water quality : research report ; no. 28. |
PUB Date Free Form |
1973 |
Series Title Untraced |
Research program for the abatement of municipal pollution within the provisions of the Canada-Ontario agreement on Great Lakes water quality : research report ; no. 28 |
BIB Level |
m |
Document Type |
BC |
Medium |
unmediated |
Content |
text |
Carrier |
volume |
Cataloging Source |
OCLC/T |
LCCN |
2008378663 |
Merged OCLC records |
1015771252; 1380897433 |
OCLC Time Stamp |
20230713213018 |
Language |
eng |
SUDOCS Number |
EN43-11/28 |
Origin |
OCLC |
Type |
CAT |
OCLC Rec Leader |
04158cam 2200529 i 45010 |