Abstract
In dairy industry, primary and secondary treatmentmethods are quite common for effluent treatment. However,this type of treatment is not effective in filtering thenutrients from the dairy waste water. Nutrient removalcapacity of some important macrophytes i.e. Eichhorniacrassipes, Lemna minor and Azolla pinnata have beentested individually as well as in combinations undermicrocosm investigations. Percentage nitrogen removal valuesby E.crassipes, A.pinnata and L. minor were 71.8 ± 0.20, 62.5 ± 0.39 and 60.13 ± 0.48.Corresponding figures for phosphorus were 63.2 ± 0.98,58.8 ± 0.57 and 56.3 ± 0.51. Maximum removal wasobserved in combination studies, involving E. crassipesand L. minor (78.8 ± 0.18% nitrogen and69.4 ± 0.11% phosphorus). Analysis of variance revealedsignificant (p < 0.001) variation among different incubationperiods, both for nitrogen (F = 395985) and phosphorus (F =196767) removal by a combination of E. crassipes, andL. minor. E. crassipes and A. pinnata removed74.1 ± 0.11% of nitrogen and 68.7 ± 1.0% ofphosphorus, whereas, it was recorded 70.0 ± 0.25%nitrogen and 66.7 ± 0.95% phosphorus by combination ofL. minor and A. pinnata.
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Tripathi, B.D., Upadhyay, A.R. Dairy Effluent Polishing by Aquatic Macrophytes. Water, Air, & Soil Pollution 143, 377–385 (2003). https://doi.org/10.1023/A:1022813125339
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DOI: https://doi.org/10.1023/A:1022813125339