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CH610579A5
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Process and apparatus for the dewatering of sludge
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DE2504412A1
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Combined anaerobic and aerobic stabilisation of sewage - benefiting completely from the advantages of both systems
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DE2452574A1
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Aeration device for water softening, deoxidation or sewage treatments - has buoyancy tendency of suspended filter elements counteracted
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DE2439991A1
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Densifying sludge in sewage farm settling tanks - by vibrating submerged plates, cylinders, etc. to accelerate precipitation
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CH575344A5
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Aeration device for water softening, deoxidation or sewage treatments - has buoyancy tendency of suspended filter elements counteracted
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CH572448A5
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Aeration device for water softening, deoxidation or sewage treatments - has buoyancy tendency of suspended filter elements counteracted
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DE2351097A1
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Digested sludge dewatering system - on endless-belt screen through straining, suction and pressure zones
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DE2351096A1
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Recycling gas into fermentation vessels - using flexible hose which allows removal of nozzle during operation
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