Nano filtration

1. DAYANANDA SAGAR COLLEGE OF ENGINEERING
(An Autonomous Institution affiliated to Visvesvaraya Technological University, Belagavi &ISO 9001:2015, ISO
14001:2004 and ISO 22000:2005 Certified) Accredited by National Assessment & Accreditation Council (NAAC)
with ‘A’Grade & Accredited by National Board of Accreditation (NBA)
Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru - 560078
Presentation on
“ WATER TRITMENT BY NANOFILTERATION MEMBRANES”
Presented by :
SHIVAYOGI – 1DS20CV086
Under the guidance of
Prof . NEETHU URS
Department of Civil Engineering
Dayananda Sagar College of Engineering

2. CONTENTS:
 Introduction
 Principal of Nanofiltration Process
 What is Nanofiltration?
 About Membrane Filter
 Types of Membranes used in Nanofiltration
 Application of nanofiltration
 Advantages
 Case study
 CONCLUSION
 REFRENCES

3. INTRODUCTION:
water pollution is the contamination of water bodies (e.g lakes, rivers, oceans, aquifers
and groundwater). This form of environmental degradation occurs when pollutants are
directly or indirectly discharged into water bodies without adequate treatment to
remove harmful compounds.
Nanofiltration is one of a group of similar membrane processes (including reverse
osmosis, Ultrafiltration, and microfiltration) used most often with low total dissolved
solids water such as surface water and fresh groundwater, with the purpose of softening
(polyvalent cation removal) and removal of disinfection by-product precursors such as
natural organic matter and synthetic organic matter

5. What is Nanofiltration :
Nanofiltration (NF) is a membrane liquid-separation technology sharing many
characteristics with reverse osmosis. Unlike RO, which has high rejection of
virtually all dissolved solutes, NF provides high rejection of multivalent ions, such
as calcium, and low rejection of monovalent ions, such as chloride.

6. About Membrane Filter
:
 Membrane FilterThe membrane filtration technique utilizes quite thin
material having maximum size of pores and those particles holding effect
which occurs almost on entire surface area.
 This technique utilizes nano-sized through-pores of cylindrical shape which
can pass via membrane at 90.
 Nanofiltration membranes consists of pores having size range between 1-10
mm. Membranes utilized in this process are mainly formed from polymer thin
films.
 Most commonly used materials are PET (polyethylene teraphthalate) or
metallic elements like aluminum.

7. Types of Membranes used in Nanofiltration
 Hollow fiber membrane.
 Tubular membrane.
 Capillary membrane.
 Flat sheet membrane.
 spiral wound type membranes.

8. Application of nanofiltration
 Food sector.
 Dairy business.
 Edible oil processing area.
 Production of petroleum.
 Manufacturing of medicines.
 Pulp and Paper manufacturing.
 Management of water and removal of multivalent, viruses, bacteria and suspended
solids.

9. Advantages
 NF possess lesser discharge volumes, minor retentate concentrations than that of
Reverse Osmosis for minute value salts.It reduces the content of salt and also
reduces dissolved matter content i.e., (TDS) within brackish water.
 This process is chemical-free so doesn't needs salt or chemicals while operating.
 After nanofiltration, the pH of water remains usually non-aggressive.

10. CASE STUDY
 A case study on water treatment using nanofiltration membranes demonstrates its effectiveness in
removing contaminants like bacteria, viruses, and heavy metals from wastewater.
 The technology offers high rejection rates while maintaining a reasonable flux, making it suitable for
various applications including drinking water purification and industrial wastewater treatment.
 Through a combination of physical sieving and electrostatic interactions, nanofiltration membranes
achieve superior filtration efficiency compared to traditional methods.
 Case studies highlight its cost-effectiveness and sustainability, contributing to the global effort to
ensure access to clean water resources.
 Overall, nanofiltration membranes represent a promising solution for addressing water quality
challenges worldwid

11. CONCLUSION
 the integration of nanofiltration membranes into the water treatment
process provided the municipality with a sustainable and efficient
solution to address water quality challenges. The success of this
case study demonstrates the potential of membrane-based
technologies in mitigating water scarcity and ensuring access to
clean water for communities worldwide.

12. REFRENCES
 Nanofiltration: Principles and Applications" by A. Alpatova and N. Hilal (2018).
 "Advanced Membrane Technology and Applications" edited by N.N. Li and A.G. Fane (2008).
 "Nanofiltration: Principles, Applications, and the Search for New Materials" by N. Hilal et al.
(2009).
 "Nanofiltration in Water Treatment: A Review" by M. J. Sadrzadeh and A. R. Mansourpanah
(2017).
 "Nanofiltration for Water and Wastewater Treatment—A Review" by V.K. Shah et al. (2008).

13. NPTEL CERTIFICATE

14. THANK YOU