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Title: Aerobic Biodegradation of Precoagulated Cheese Whey Wastewater
Authors: Rivas, Javier
Prazeres, Ana R.
Carvalho, Maria de Fátima
Keywords: Cheese whey wastewater
Dairy effluents
Aerobic biodegradation
Issue Date: Mar-2011
Publisher: ACS
Citation: Prazeres, A, Carvalho, M., Rivas, J. (2012). Cheese whey management: a review. Journal of environmental management, vol. 110,
Abstract: Prior to the application of an aerobic biological process, cheese whey wastewater has been pretreated by means of a precipitation stage by adding either NaOH or CaOH2. Both precipitating agents reduce roughly 50% of the raw wastewater chemical oxygen demand (COD). The sludge generated in the prestage shows acceptable settling properties, although solids from the CaOH2-treated effluent are better separated from the liquid bulk than those formed in NaOH-processed wastewater. In both situations, the presedimentation stage renders a supernatant more prone to biodegradation than the untreated effluent. The previous statement is corroborated by the determination of some biological kinetic parameters. Under the operating conditions used in this work, sludge generation after the biological process is reduced to a minimum. The sludge generated shows good settling properties, especially for those experiments in which CaOH2 has previously been added.
Peer reviewed: yes
ISSN: 0021-8561
Publisher version:
Appears in Collections:D-TCA - Artigos em revistas com peer review

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