5 edition of Biological Phosphorus Removal : Manual for Design and Operation (Water & Wastewater Practitioner Series: Stowa Report) found in the catalog.
|LC Classifications||June 30, 2002|
|The Physical Object|
|Pagination||xvi, 84 p. :|
|Number of Pages||85|
nodata File Size: 3MB.
Baniotopolous Department of Civil Engineering, Chair of Sustainable Energy Systems, Director of Resilience Centre, School of Engineering, University of Birmingham, U.
The phosphorus removing microorganisms grow relatively slowly but generally faster than the nitrifying bacteria. However, in such a configuration biological phosphorus removal is adversely affected if the aerobic zone is large enough to allow nitrifying bacteria to grow.
National Research Council 1993 Managing Wastewater in Coastal Urban Areas, National Academy Press, Washington, D. Under these conditions, the capability of heterotrophic microorganisms to metabolize organic matter is dramatically reduced.
Nitrification Nitrification is the biological conversion of ammonia-nitrogen to nitrate-nitrogen. 2 mg of alkalinity as CaCO 3 for each mg of NO 3-N produced. The optimum pH for growth of the nitrifying bacteria is generally about 7. Many systems exist which exploit this feature to encourage an extensive degree of nitrification and denitrification within the system.
In the process illustrated in Figure 3, nitrification the first step in a biological removal process occurs in the first aerobic zone.
This can be an important issue if certain industrial wastewaters are being treated Sedlak, 1991. The mechanisms operating in biological nitrogen removal systems are discussed first, allowed by the mechanisms operating in biological phosphorus removal systems. This material will generally be flocculated and incorporated into the biological treatment system mixed liquor and subsequently removed from the process with the waste sludge.
Nitrogen removal will occur by this mechanism in BNR systems, just as it occurs in any biological wastewater treatment system. Jaroslav Kruis Department of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Czech Republic• Also new from previous versions, design guidance herein is based on the use of mathematical models and simulators. Waltrip 1990"Full-Scale and Pilot-Scale Experience with the VIP Process," Presented at the First Australian Conference on Biological Nutrient Removal BNR1Bendigo, Australia.
Table 1 summarizes the impacts of nutrient discharges on receiving waters. A frequently used correlation is that developed by Burdick, Stensel, and Refling 1982. However, as also illustrated in Figure 6, when the phosphorus accumulating microorganisms subsequently pass into the aerobic zone where oxygen is provided to allow aerobic metabolism, they oxidize the stored organic matter and generate energy which is used to take up phosphate from solution and store is as polyphosphate.
Extended fundamental and full-scale research has been carried out into the bio-P process and the state-of-the-art is described in this report. Some of the most significant ones include dissolved oxygen DOpH, and the presence of inhibitors.
Different process options may also simply represent different approaches to accomplish the same objectives.
This recycle stream takes denitrified mixed liquor exiting the anoxic zone and delivers it to the process influent as it flows into the anaerobic zone.
Daigger Vice-President, CH2M-HILL Denver, Colorado INTRODUCTION The environmental protection profession is increasingly recognizing the adverse impacts that can be caused by the discharge of the nutrients nitrogen and phosphorus to the aquatic environment National Research Council, 1993.
This occurs since slightly more energy can be obtained by the oxidation of carbonaceous organic matter using oxygen as the terminal electron acceptor than when nitrate-nitrogen serves as the terminal electron acceptor.