AR242940A1
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1993-06-30
Metodo para tratar lodos de aguas de desecho para suministrar un fertilizador.
DE3162020D1
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1984-03-01
Method and apparatus for the denitrification of water
EG14934A
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1985-06-30
Method and apparatus for aerating waste water or sludges thereof
ZA86245B
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1986-08-27
Method and apparatus for biological aerobic wastewater treatment
DE3060994D1
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1982-12-02
Process and apparatus for nitrification and denitrification of waste waters
EP0182380A3
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1987-10-21
Process and apparatus for the biological treatment of water, especially for the denitrification of drinking water
GB2128980B
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1986-10-01
Apparatus and method for the treatment of wastewater sludge
DE3264530D1
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1985-08-08
Process for the simultaneous purification and detoxication of waste waters or solutions that contain cr (vi)
GB2152021B
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1988-12-29
Method and device for the biological treatment of waste water
DE3372436D1
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1987-08-20
Process and apparatus for the biological anaerobic denitrification of aquarium water
GB2077127B
(en )
1983-06-02
Method of and apparatus for the deep aeration of sewage
CS653087A2
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1989-10-13
Method of sewage treatment that contains nitrates and/or nitrites
GB2218975B
(en )
1992-05-27
Method and device for the treatment of sewage containing nitrites
GB2118537B
(en )
1986-01-08
Method of concentration of biological especially activated sludge
BG46513A1
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1990-01-15
Method for biological treatment of sewage waters containing nitrites and nitrates
JPS5710400A
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1982-01-19
Method of treating sewage sludge
EP0226715A3
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1988-04-06
Process and apparatus for the biological denitrification of water
GB2164641B
(en )
1988-12-29
Method and apparatus for the biological treatment of sewage
JPS54131348A
(en )
1979-10-12
Biological denitrification method of waste water
GB2118161B
(en )
1985-07-17
Process and equipment for biological purification of waste waters by means of activated sludge
JPS5681181A
(en )
1981-07-02
Method of treating tilling pond sludge
JPS52120559A
(en )
1977-10-11
Method of treating waste water using growth promoting agent for activated sludge
HRP920636A2
(en )
1996-06-30
Method and apparatus for biological purification of wastewater with no excess activated sludge
PL238955A1
(en )
1984-07-02
Method of biological sewage treatment and unit therefor
PL255336A1
(en )
1987-04-06
Apparatus for biological denitrification and dephosphatation of waste waters