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GB1077356A
|
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Burning sewage plant skimmings
|
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US3285415A
|
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Sludge collector method and apparatus
|
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US3255887A
|
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Sludge digester
|
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GB1023550A
|
|
Sludge digesters
|
|
US3242071A
|
|
Intermittent stirring apparatus for digesters and method of operating a digester
|
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US3187897A
|
|
Digester with gas lifts positioned by gas-lock tubes
|
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US3194756A
|
|
Process for digesting sludge and digester therefor
|
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US3242072A
|
|
Aerators with water-sealed blow-off
|
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US3028816A
|
|
Airlift pumps with valving baffles
|
|
US3048164A
|
|
Air-activated carbonation
|
|
US3153682A
|
|
Tank aeration with clustered freeflowing air orifices alone
|
|
US2679319A
|
|
Apparatus for backflushing sectional filters
|
|
US2717774A
|
|
Nozzle cleaning backflow apparatus
|
|
US2698655A
|
|
Flame rod support
|
|
US2720489A
|
|
Digester
|
|
US2635758A
|
|
Clarification apparatus
|
|
US2635757A
|
|
Water clarification apparatus and method
|
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US2542602A
|
|
Apparatus for heating sludge
|
|
US2616676A
|
|
Aerator
|
|
US2573941A
|
|
Water treating apparatus and method
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