Innovative wastewater treatment using reversing anaerobic upflow system (RAUS)

Book · Fri Nov 01 00:00:00 EST 1996

OSTI ID:395309

Basu, S K ^[1]

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1. Univ. of Manitoba, Winnipeg, Manitoba (Canada). Environmental Engineering Div.

Anaerobic processes are widely popular in the treatment of a variety of industrial wastewaters since the development of such high rate treatment processes like upflow anaerobic sludge blanket (UASB), anaerobic filter, and the fluidized-bed process. In order to devise a low cost/high technology system so that it would provide an economical solution to environmentally sound pollution control, the Reversing Anaerobic Upflow System (RAUS) was developed. The system consists of two anaerobic reactors connected to each other. At the beginning, one reactor is fed upwards with wastewater while the other acts as a settling tank. After a set interval of time, the flow is reversed such that the second reactor is fed with wastewater and the first one acts as the settler. This particular feeding pattern had shown improved settling characteristics and granulation of methanogenic biomass from research carried out at the Hannover University with different wastewaters. The biological reaction vessels to which wastewater is introduced intermittently functions basically as a sludge blanket type reactor although the costly integrated settling devices present in a typical UASB system are avoided. The RAUS combines three principle reactor configurations: (1) conventional with sludge recycling; (2) fill and draw or sequential batch, inflow maintained constant during feeding; (3) upflow anaerobic sludge blanket. A pilot scale RAUS was operated for 400 days using distillery wastewater consisting of molasses slop and bottle washing water mixed in the ratio 1:1. This paper discusses the results of pilot scale experiments.

• OSTI ID: 395309
• Report Number(s): CONF-9505206-; TRN: IM9648%%432
• Resource Relation: Conference: 50. Purdue industrial waste conference, W. Lafayette, IN (United States), 8-10 May 1995; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the 50. industrial waste conference; Wukasch, R.F. [ed.]; PB: 861 p.
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
09 BIOMASS FUELS
WASTE WATER
ANAEROBIC DIGESTION
BIOREACTORS
DESIGN
PERFORMANCE
OPERATION
METHANE
BIOSYNTHESIS
BEVERAGE INDUSTRY
WASTE PROCESSING PLANTS
PILOT PLANTS
WATER CHEMISTRY
CHEMICAL OXYGEN DEMAND
PH VALUE
CARBOXYLIC ACIDS
EXPERIMENTAL DATA