Process and apparatus for separating heavy and light materials from a suspension
DE19843502A1
Treating biological waste comprises composting by anaerobic treatment followed by aerobic treatment, minimizing health hazards and nuisance
DE19807116A1
Process and plant for separating or separating heavy and light materials from a suspension
DE19806973A1
Vacuum valve
DE19806857A1
Vacuum or sub-atmospheric pressure suction device
DE19633178A1
Control for a suction and / or water valve that can be operated with negative pressure
DE19605146A1
Sludge drum drier vapours sub-divided and returned to drum without condensation or dust removal;
DE19546649A1
Sanitary system with liquid flushing
DE19523263A1
Prodn. of biodegradable substances, esp. short-chain organic acids, by fermentation of raw sludge
DE4431486A1
Vacuum sewage system
DE4402566A1
Foul water gasified by high speed gas lance jet extending from surface to base of holding tank
DE4343733A1
Control arrangement for a shut-off valve which can be actuated by negative pressure
DE4335945A1
Suction device
DE4336020A1
Control arrangement for a shut-off valve which can be actuated by negative pressure
DE4213316A1
Fine bubbling device e.g. for waste water aeration - has flat elements joined by flexible spacers
DE4124915A1
Improved processing waste water - by combining wash water contg. active washing cpds. with rinsing water, filtering and processing by flotation for re-use
DE4033167A1
Positioning aeration assembly in tank - e.g. in clarification tank, using guide ropes attached at spaced points and passing through guide elements at tank bottom
DE4003487A1
Anaerobic breakdown of sludge in digestion tank - with aerobic-anaerobic pre-treatment
DE3933511A1
Waste water treatment esp. from cosmetics industry - by addn. of oxidising agent and/or catalyst and exposure to artificial UV radiation to get rid of lipophilic substances
DE3836637A1
Arrangement of collecting and letting off condensate in particular
