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Download Prudent Practices for Disposal of Chemicals from by Committee on Hazardous Substances in the Laboratory, Mathema PDF

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By Committee on Hazardous Substances in the Laboratory, Mathema Commission on Physical Sciences, National Research Council

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Extra resources for Prudent Practices for Disposal of Chemicals from Laboratories

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Batch loading Phase 3 5-day HRT - February to April 2005. , 2005). One of the reasons may be that initially the wetland systems’ microbial environment was not yet fully established. The purpose of repeating this mode of operation therefore was to determine if the performance would be different with the mature wetland system. The system operation in this mode lasted 75 days and involved the unplanted cells, Phragmites and C. papyrus cells. 1 Wetland volumes in batch mode operation. The instantaneous hydraulic loading rate was maintained between 2 - 4 cm/day.

1994. Wetland Treatment of pulp and paper mill wastewater. Water Science and Technology 29(4): 241 - 247. L. 1978. Industrial water pollution origins, characteristics and treatment. Addison-Wesley Publishing Company, Reading, Massachusetts, 738p. B. and Carrington, E. G. 1972. Recent developments in the study of bacteria in the activated-sludge process. M. and Grigsby, J. 1999. Nutrients within integrated bleached Kraft mills: sources and behaviour in aerated stabilization basins. Water Science and Technology 40 (11-12): 77 - 84.

4 Comparison of ET rates (mm per gram dry weight per day) for various wetland cells under different operation conditions – continuous flow phases1&2 (cflow) and batch phases 2&3. Cells B1 and B2 had Typha; cells C1 and C2 had Phragmites while cells D1 and D2 had papyrus. 0 0 0 B 1 B 2 C 1 C 2 D 1 D 2 W e t la n d c e ll Fig. 5 Comparison of ET rates (mm per shoot per day) for various wetland cells at different operation conditions – continuous flow phases1&2 (cflow) and batch phases 2&3. Cells B1 and B2 had Typha; cells C1 and C2 Phragmites while cells D1 and D2 had papyrus.

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