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'Present book is the findings of innovative research work conducted on the wastewater treatment by non-conventional method. Aquatic plants have been tested under different experimental conditions for tertiary treatment of wastewater and amazing observations are cited in the book. Biomass generated through sequestration of nutrients are recommend for multiple economical benefits.'  Contents Chapter 1: Introduction, Wastewater generation, Types of water pollutants, Adverse effects of wastewater, Impact of water pollution on aquatic life, Treatment, Low cost waste treatment, Use of aquatic plants for wastewater treatment, Dairy industry and pollution, Aims and objectives; Chapter 2: Review of Literature, Introduction, Water chemistry and biological property in relation to pollution, Wastewater analysis, Removal of nutrients by aquatic macrophytes, Aquatic plants and biomass production, Nutrients removal through constructed wetlands, Diel variation in freshwater wastewater treatment, Removal of heavy metal dairy wastewater, Effect of pollution on aquatic plants, Work done in India; Chapter 3: Dairy Industry and Study Site, Milk processing industries in India: An overview, Location of milk dairies, Cost of treatment, Minimal natinoal standards MINAS, Study site geographical position of Varanasi, Meterological conditions of Varanasi, Location of site, Milk, Milk productsion, Product spectrum, Milk procurement and wastewater generation, Effluent treatment plant of Ramnagar dairy; Chapter 4: Material and Methods, Sampling, Analytical methods, Physico-chemical characteristics plant tissue analysis, Statistical analysis; Chapter 5: Physico-chemical Properties of Dairy Wastewater, Introduction, Quality of raw and treated dairy wastewater, Results and discussion, Polynormal regression models for COD-BOD for dairy industry wastewater; Chapter 6: Wastewater Treatment by Aquatic Macrophytes, Introduction, Experimental plan, Description of selected aquatic macrophytes; Chapter 7: General Discussion, Introduction, Milk procurement and wastewater generation, Quality of raw and treated wastewater, Nutrient removal by aquatic macrophytes; Chapter 7: Summary, Conclusions and Recommendations.