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Method of constructing an underground structure
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Filtering well
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Structure for purifying waste water from petroleum products and suspended matter
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Arrangement for conveying sediment
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Installation for treating waste water sediment and producing compost
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Water-diverting structure
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Arrangement for flotation treatment of waste water
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Apparatus for purifying waste water by settling and flotation
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Apparatus for collecting and removing sludge from secondary radial settler
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Tubular aerator
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Arrangement for flotation cleaning of waste water
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Water-cooling tower
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Arrangement for waste water treatment
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Radial settler for cleaning oil containing waste waters
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Hopper arrangement
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Apparatus for aeration liquids
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Container structure
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Device for waste liquid distribution, dusting substance collection and precipitate raking in radial settler
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Liquid receptacle structure
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Device for transporting precipitate
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