1. Industrial wastewater and persistent organic pollutants2. Wastewater detoxification and processes integration3. Toxicity and water reuse4. Bioremediation of Organic pollutants5. Bioremediation of Metals and Radionuclides6. Nanotechnology for remediation of organic pollutants7. Nitrate Pollution and its Remediation8. Bioremediation of Petroleum hydrocarbons9. Biofilms in Porous Media10. Algal role in effluent treatment11. Circular Economy