Results 91 to 100 of about 482 (122)

Autothermal Thermophilic Aerobic Digestion

Journal of the Environmental Engineering Division, 1978
Aerobic digestion at thermophilic temperatures has been examined comparing air and oxygen as aeration gases. Theoretical considerations indicated that autothermal operation can only be economically achieved when high purity oxygen is used. Heat balances using oxygen and air demonstrate that when air is used, evaporative and gas sensible heat losses ...
Michael S. Gould, Raymond F. Drnevich
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Mathematical modelling of autothermal thermophilic aerobic digesters

Water Research, 2007
This paper presents a new mathematical model for Autothermal Thermophilic Aerobic Digesters. The reactor has been modelled as two completely mixed volumes to separately predict the behaviour of the liquid and gaseous phases as well as the interrelation between them.
J, Gomez, M, de Gracia, E, Ayesa, J L, Garcia-Heras   +3 more
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Design Considerations for Autothermal Thermophilic Aerobic Digestion

Impacts of Global Climate Change, 2005
ATAD design recommendations are developed from University research, demonstration pilot studies, and several years of plant operation and assessment. These investigations have provided a design approach for those who may be considering the ATAD process for biosolids treatment.
Harlan G. Kelly, Wayne Urban, Roger Warren   +2 more
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Effect of Microaerophilic Conditions on Autothermal Thermophilic Aerobic Digestion Process

Journal of Environmental Engineering, 2001
A pilot-scale, first-stage, autothermal thermophilic aerobic digestion reactor was used to study the effect of microaerophilic conditions on sludge solids destruction, volatile fatty acids (VFA) production, and phosphorus release. For the aeration rates of 0–100 mL/min and the reactor sludge volume of 72 L, with a primary to secondary sludge ratio of ...
Donald S. Mavinic, Venkatram Mahendraker, Abyartha Sharma, Harlan G. Kelly   +3 more
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Microbial ecology of Autothermal Thermophilic Aerobic Digesters (ATAD)

2023
Submission note: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Pharmacy, Faculty of Science, Technology, and Engineering, La Trobe University, Bundoora.
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Bacterial community analysis of swine manure treated with autothermal thermophilic aerobic digestion

Applied Microbiology and Biotechnology, 2010
Due to the environmental problems associated with disposal of livestock sludge, many stabilization studies emphasizing on the sludge volume reduction were performed. However, little is known about the microbial risk present in sludge and its stabilized products.
Il, Han, Shankar, Congeevaram, Dong-Won, Ki, Byoung-Taek, Oh, Joonhong, Park   +4 more
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The one-stage autothermal thermophilic aerobic digestion for sewage sludge treatment

Chemical Engineering Journal, 2011
Abstract One-stage autothermal thermophilic aerobic digestion (ATAD) is promising for sewage sludge stabilization in small- and medium-sized wastewater treatment plants (WWTPs). A one-stage ATAD large-scale digester was designed with effective volume 10 m3, and batch-mode operation was conducted on sewage sludge to evaluate the effectiveness of the ...
Shugen Liu, Nanwen Zhu, Loretta Y. Li
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Dynamic analysis of a biofilter treating autothermal thermophilic aerobic digestion offgas

Journal of Environmental Engineering and Science, 2006
There is little information to describe how a biofilter responds biologically and chemically to the dynamic loading of complex mixtures of contaminants that are present in autothermal thermophilic aerobic digestion (ATAD) offgases. This paper presents the results of a full-scale study that is the first stage in a longer project to evaluate the use of ...
B Shanchayan, W Parker, C Pride
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Chemical and microbial changes during autothermal thermophilic aerobic digestion (ATAD) of sewage sludge

Bioresource Technology, 2010
Autothermal thermophilic aerobic digestion (ATAD) is a promising process for sewage sludge stabilization. Batch experiments were conducted on sewage sludge collected from a municipal wastewater treatment plant in Shanghai, China, to evaluate the effectiveness of the ATAD system by determining changes in volatile suspended solids (VSSs) and to study its
Shugen, Liu, Fanyong, Song, Nanwen, Zhu, Haiping, Yuan, Jiehong, Cheng   +4 more
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Efficiency of Autothermal Thermophilic Aerobic DigestionUnder Two Different Oxygen Flow Rates

Water Environment Research, 2014
ABSTRACT: The objective of this research was to understand the influence of oxygenation at two different oxygen flow rates (0.105 and 0.210 L/L/h) on autothermal thermophilic aerobic digestion (ATAD), and on the overall performance of Dual Digestion (DD).
Sebnem Koyunluoglu, Aynur, Rumana, Riffat, Sudhir, Murthy   +2 more
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