Sewage Treatment 1

Synopsis: Looks at the technical response to changing community standards on sewage treatment: 40 years ago - public health (primary treatment - screening, settling, anaerobic digestion, chlorination); 20 years ago - biochemical oxygen demand (secondary and tertiary treatment - trickling filter, aerobic digestion, ponding); 10 years ago - nutrients, phosphorus and nitrogen (excessive growth in rivers, chemical removal, biological removal, activated sludge process); today - new processes (biodigestion, membrane filtration, magnetite process, dissolved air process); effluent disposal (ground water, rivers, dunes, ocean).
Language: English
Country: Australia
Medium: Video; Videocassette. VHS. col. 22 min.
Year of production: 1992
Availability: Sale; 1997 sale: £28.75 (+VAT +p&p)
Documentation: Accompanying teacher’s notes.
Uses: 6th-form chemistry.
Subjects: Chemistry; Environmental science
Keywords: sewage treatment

Name: Classroom Video
Notes: Classroom Video ceased trading in January 2015. Some of their assets including the streaming platform and our curriculum content have been acquired by ClickView. Around 160 DVD titles are available (or will be made available) through Boulton-Hawker.

Name: Classroom Video
Notes: NB Classroom Video ceased trading in January 2015. Potential customers are directed to DVD sales enquiries are directed to sales@boultonhawker.co.uk and are asked to note that not all third party, or proprietary content which includes videos produced by VEA, Classroom Video, Online Classroom and Training Point will be available from Boulton Hawker. Streaming customers are asked to be aware that: All current licences will remain active for the duration of their license period (including embed links and clips that you have created) No streaming licence can be renewed after the existing license period has lapsed Classroom Video’s parent company VEA will manage existing streaming licences from a technical and administrative perspective. For all enquiries please contact support@vea.com.au

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