University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Waste -> organics

Citations 2

"Flow Injection Analysis Using Potassium Permanganate: An Approach For Measuring Chemical Oxygen Demand In Organic Wastes And Waters"
Anal. Lett. 1980 Volume 13, Issue 11 Pages 1001-1011
Takashi Korenaga

Abstract: A rapid and continuous analytical method based on flow injection analysis was developed for the determination of COD due to organic substances in polluted water. The apparatus uses a double reciprocating micro-pump, a constant-volume sampling valve, a spectrophotometer, a recorder, and various lengths of polytetrafluoroethylene tubing. Potassium permanganate and sulfuric acid solutions were individually pumped up as oxidizing agents, and glucose was used as a standard substance. All samples were filtered with a 0.45 micron pore size membrane filter, and dissolved COD substances were measured. Municipal sewage, human wastes, and river water were examined, and COD values agreed with those obtained using the JIS method within the permissible error range of + or - 30%.
Chemical oxygen demand Spectrophotometry Method comparison

"Experiences With Automatic N And P Measurements Of An Activated Sludge Process In A Research Environment"
Water Sci. Technol. 1996 Volume 33, Issue 1 Pages 165-173
S. Isaacs and H. Temmink

Abstract: Some of the advantages of on-line automatic measurement of ammonia, nitrate and phosphate for studying activated sludge systems are pointed out with the help of examples of batch experiments. Sample taking is performed by cross-flow filtration and measurement of all three analytes is performed by Flow Injection Analysis (FIA). Two batch set-ups are described. In the first, one of the two 800 l nitrifying/denitrifying tanks of a pilot-scale alternating process is employed as batch reactor, which has the advantage of a high measurement frequency and little preparatory and clean-up effort. The second consists of four 5 l jars connected to the FIA system and allows on-line measurement of ammonia, nitrate and phosphate while performing batch reactions in parallel. Each of the four examples described was designed to study a particular aspect pertaining to Enhanced Biological Phosphate Removal (EBPR): the effect of acetate addition on aerobic P-uptake; the recovery of aerobic P-uptake after a disturbance; the interaction between denitrification and P-release when acetate is added at various rates; and the effect of stored PHB levels on denitrification by phosphate accumulating organisms.
Nitrogen Filtration Automation