Pre-Precipitation Facilitates Nitrogen Removal without Tank Expansion

1990 ◽  
Vol 22 (7-8) ◽  
pp. 85-92 ◽  
Author(s):  
Ingemar Karlsson ◽  
Gunnar Smith
Keyword(s):  
Waste Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Carbon Source ◽  
Nitrogen Removal ◽  
Waste Water Treatment ◽  
Chemical Precipitation ◽  
Sewage Water ◽  
Laboratory Studies ◽  
Denitrification Process

Chemically coagulated sewage water gives an effluent low in both suspended matter and organics. To use chemical precipitation as the first step in waste water treatment improves nitrification in the following biological stage. The precipitated sludge contains 75% of the organic matter in the sewage and can by hydrolysis be converted to readily degradable organic matter, which presents a valuable carbon source for the denitrification process. This paper will review experiences from full-scale applications as well as pilot-plant and laboratory studies.

Pre-Precipitation Facilitates Nitrogen Removal without Tank Expansion

1991 ◽  
Vol 23 (4-6) ◽  
pp. 811-817 ◽  
Author(s):  
Ingemar Karlsson ◽  
Gunnar Smith
Keyword(s):  
Waste Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Carbon Source ◽  
Nitrogen Removal ◽  
Waste Water Treatment ◽  
Chemical Precipitation ◽  
Sewage Water ◽  
Laboratory Studies ◽  
Denitrification Process

Chemically coagulated sewage water gives an effluent low in both suspended matter and organics. To use chemical precipitation as the first step in waste water treatment improves nitrification in the following biological stage. The precipitated sludge contains 75% of the organic matter in the sewage and can by hydrolysis be converted to readily degradable organic matter, which presents a valuable carbon source for the denitrification process. This paper will review experiences from full scale applications as well as pilot plant- and laboratory studies.

scholarly journals Denitrifying Bacterial Isolation from Activated Sludge of Swine Waste Water Treatment and Carbon Source and Temperature Demanded for Denitrification

1992 ◽  
Vol 63 (1) ◽  
pp. 38-46
Author(s):  
Norihide KAKIICHI ◽  
Yoshihiko ISHIZAKI ◽  
Shuhei TOMITA ◽  
Osamu TIO ◽  
Toshiyuki MATSUNAGA ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Carbon Source ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Swine Waste ◽  
Bacterial Isolation

Biological P-Removal: State of the Art in The Netherlands

1993 ◽  
Vol 27 (5-6) ◽  
pp. 317-328 ◽  
Author(s):  
W. van Starkenburg ◽  
J. H. Rensink ◽  
G. B. J. Rijs
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
The Netherlands ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Chemical Precipitation ◽  
Waste Water Treatment Plant ◽  
Factors Affecting ◽  
P Removal

In the Netherlands the effluent requirements of municipal waste water treatment plants for P will become stricter in 1995. Depending on the design capacity of the waste water treatment plant the effluent requirement will be 1 mg/l P for plants with a treatment capacity of over 100,000 p.e. and 2 mg/l for a lower capacity. From all the P-removal techniques, such as chemical precipitation, fluid-bed pellet reactor and magnetic separation, the most promising technique in the Netherlands would seem to be biological P-removal with or without a combination of the three other techniques. In this paper a description is given of biological P-removal, especially the principle, the factors affecting biological P-removal performance, the different modifications and an example of each system in the Netherlands.

Implementing biofilm carriers into activated sludge process-15 years of experience

1998 ◽  
Vol 37 (9) ◽  
pp. 167-174 ◽  
Author(s):  
N. Müller
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Nitrogen Removal ◽  
Waste Water Treatment ◽  
Fixed Bed ◽  
Activated Sludge Process ◽  
Water Treatment Plants ◽  
Biofilm Carriers ◽  
Practical Experiences

Seven full-scale hybrid systems have been operating in waste water treatment plants in Southern Germany since the early eighties. The aerobic submerged biofilm technology applied is known as Bio-2-Sludge process. The plants have originally been designed for carbon removal and were modified later on to allow nitrogen removal. For this purpose, the age of the operating sludge had to be raised. This was achieved without any addition of reactor volume by installation of submerged biofilm carriers. The use of the submerged, fixed bed devices results in a very efficient sludge, allowing MLSS of up to 11 g/l. Operational results show both a purification improvement of BOD and ammonia and the existence of simultaneous denitrification. Practical experiences of long-term operations are being reported.

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