Liquid purification or separation – Processes – Treatment by living organism
Patent
1979-04-24
1981-06-02
Castel, Benoit
Liquid purification or separation
Processes
Treatment by living organism
210 961, 210103, 210109, 2101953, 203 33, 203 96, 55 70, 423356, 210626, 210903, 210631, C02F 308, C02F 104
Patent
active
042710138
ABSTRACT:
A method for removing biodegradable compounds selected from the group comprising: phenolics, free and fixed ammonia compounds, thiosulfates, cyanides, thiocyanates, sulfides and the like from a feed wastewater. The method comprises the steps of treating the feed wastewater by adding soda ash thereto; and further treating the wastewater by means of an activated sludge treatment in a sludge reactor to reduce the level of biodegradable compounds in the wastewater.
A method for removing biodegradable compounds selected from the group comprising phenolics, free and fixed ammonia compounds, thiosulfates, cyanides, thiocyanates, sulfides and mixtures thereof from a feed wastewater comprising the steps of: treating the feed wastewater with an inorganic carbon source; and further treating the wastewater by means of a single-stage activated sludge treatment in a sludge reactor to reduce the level of said biodegradable compounds in the wastewater.
An apparatus for treating a wastewater containing biodegradable compounds including free and fixed ammonia. The apparatus comprises an ammonia still for removing free and fixed ammonia; a source of soda ash solution; and means connected to the source of soda ash solution for feeding soda ash solution from the soda ash source to the ammonia still to decompose the fixed ammonia in the wastewater. The apparatus further comprises a single-stage activated sludge reactor for treating the wastewater to reduce the level of biodegradable compounds in the wastewater.
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Castel Benoit
Republic Steel Corporation
The Hanna Furnace Corporation
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