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ZONE DEGRADATION [1 record]
Record 1 - internal organization data 2001-03-05
Record 1, English
Record 1, Subject field(s)
- Water Pollution
- Water Treatment (Water Supply)
Record 1, Main entry term, English
- zone of degradation
1, record 1, English, zone%20of%20degradation
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- degradation zone 2, record 1, English, degradation%20zone
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Zones of Water Pollution. Discharge or mixing zone is where pollutants enter the stream or the river. If the waste is dark, it will make the water dark, increase its temperature and subsequently oxygen levels will drop. The rate of discharge should not be stronger than flow of the stream. In zone of degradation oxygen levels drop from BOD (biological/biochemical oxygen demand). Zone of active decomposition is characterized by the following changes: 1) dissolved oxygen (DO) will be at its absolute minimum; 2) odors and gases bubbling up. In the zone of recovery the river will slowly restore its oxygen through aeration process. The anaerobic conditions will disappear. Nitrites will be converted into nitrates and stimulate growth of algae, which will produce oxygen through process of photosynthesis. In zone of clean water oxygen levels are really elevated. And BOD is almost satisfied. 1, record 1, English, - zone%20of%20degradation
Record 1, French
Record 1, Domaine(s)
- Pollution de l'eau
- Traitement des eaux
Record 1, Main entry term, French
- zone de dégradation
1, record 1, French, zone%20de%20d%C3%A9gradation
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Zone située en aval d'un rejet d'eaux usées dans laquelle s'effectue la première phase de dégradation de la matière organique. 1, record 1, French, - zone%20de%20d%C3%A9gradation
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Contaminación del agua
- Tratamiento del agua
Record 1, Main entry term, Spanish
- zona de degradación
1, record 1, Spanish, zona%20de%20degradaci%C3%B3n
correct, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 DEF
Primera zona del proceso de autopurificación de un efluente contaminado. Se caracteriza por la presencia de materias contaminantes flotantes. Su contenido de oxígeno disminuye pero no se agota inmediatamente. 1, record 1, Spanish, - zona%20de%20degradaci%C3%B3n
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