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CH638469A5
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Method for stabilizing or biological preservation of organic material in liquids.
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CH632224A5
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METHOD AND DEVICE FOR BIOLOGICAL TREATMENT OF ORGANIC SUBSTANCES CONTAINING LIQUIDS, ESPECIALLY sludge.
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CH644944A5
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Process for continuous biological evolution of heat from organic materials which can rot in a liquid medium
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CH632226A5
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Process for the biodegradation of sewage sludge
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CH628867A5
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Process and apparatus for the liquid digest of sewage sludge, liquid manure and other liquids containing digestible materials
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CH629976A5
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Process for treating, sanitising, de-watering and drying digested sludge or digestible materials in the digestion process with biological self-heating
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CH618149A5
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Method and device for biological treatment of aqueous suspensions, in particular sewage sludge and slurry
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DE2505898A1
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DEVICE FOR VENTILATION OF AN AQUATIC SUSPENSION TENDING TO FLOATING CEILINGS AND FOAMING
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NL7501713A
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Biological treatment of liq. and sewage - with added solid waste, for fertiliser or feed prodn.
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CH616396A5
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Process for the biological treatment of slurries and sewage sludge
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CH597107A5
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Biological treatment of liq. and sewage
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