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23:20 Mar 14, 2011 |
Bulgarian to English translations [PRO] Tech/Engineering - Chemistry; Chem Sci/Eng | |||||
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| Selected response from: kamilw Local time: 23:18 | ||||
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4 +2 | biological (treatment) stage / biological (treatment) step |
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biological (treatment) stage / biological (treatment) step Explanation: http://preview.tinyurl.com/66gcm2c p. 56 - mechanical, biological and chemical step in wastewater treatment "Secondary (biological) treatment Settled sewage then flows to an aerobic biological treatment stage where it comes into contact with micro-organisms which remove and oxidise most of the remaining organic pollutants." http://www.euwfd.com/html/sewage_treatment.html |
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