Low cost bench scale community level water treatment system and adsorption method for removal of nitrate from groundwate
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(2020) 6:103
ORIGINAL ARTICLE
Low cost bench scale community level water treatment system and adsorption method for removal of nitrate from groundwater K. N. Priyankashri1 · H. J. Surendra2 Received: 6 July 2020 / Accepted: 12 October 2020 © Springer Nature Switzerland AG 2020
Abstract Nitrate contamination has gain significant research interest, since presence of nitrate in large quantity in drinking water, often causes health disorders. In present day situation, nitrate removal is important aspects of water treatment process. Prevailing process, conditional influence and various approaches play important role in nitrate remediation. Various physical and chemical methods are available to remove the nitrate from groundwater; these are effective in removal but expensive in operation. To overcome these limitations, low cost bench scale water system with suitable adsorption method is adopted. In the present study, a treatment system was developed for community level comprising of anoxic batch reactor; filtration unit and a chlorination unit. Adsorption method is extremely useful in nitrate removal for different dosages such as: 5 g/L, 7.5 g/L, 10 g/L, since it retains nitrogen within the root zone. From the experiment, it is found that, low cost bench scale treatment method was effective in nitrate removal as material used were cost effective and locally available. Adsorbent method such as fly ash shows prominent result compared to other adsorbent such as activated carbon for an optimized condition of 7.5 g/L. Hence it can be recommended compared to other methods. Keywords Adsorption · Groundwater · Nitrate · Water treatment · Bench scale · Low cost
Introduction Ground water is one of the main sources for drinking in many rural communities, as well in some large cities. Most of the surface resources are exposed to contamination; ground water has received the attention, since common belief that ground water is clean and fresh. Due to anthropogenic activities, urbanization and agricultural farming has made the environment pollution as growing concern. Ground water contamination with respect to nitrate is observed in many places. A fertilizers application in larger quantity with over irrigation leads to pollution of groundwater. Nitrate is one of the inorganic pollutants caused due to industrial, animal and human waste through the activity of microbes. * H. J. Surendra [email protected] K. N. Priyankashri [email protected] 1
Department of Civil Engineering, SKIT, Bangalore, Karnataka, India
Department of Civil Engineering, ATRIA Institute of Technology, Bangalore, Karnataka, India
2
Nitrates in both surface and subsurface sources will be the most important aspects for pollution. Nitrates having driving force with soil, since both soil and nitrates are negative charged ions. Entry of nitrates in water environment is due to application of nitrate fertilizers, which are soluble in water. Due to excessive water, soil result in leaching, carry nitrate fertilizers along with water. Portion of nitrate
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