Addressing the ever-demanding crisis of water scarcity, Dr Mohit Aggarwal, Assistant Professor from the Department of Civil Engineering, has published a paper titled “Polyculture Microalgae and Zno/GAC-nanocomposite System for Greywater Treatment” in the Q1 journal Biomass and Bioenergy with an impact factor of 5.8. In his research, Dr Aggarwal explores sustainable methods to treat wastewater with algae and nanoparticles, providing an efficient method to reuse greywater and reduce water consumption.

Abstract

This study explores sustainable greywater treatment using microalgae and a ZnO/GAC nanocomposite in a 15-day batch photobioreactor. The system achieved significant nutrient removal, with 80% TOC, 94.2% PO43−, and 99.6% NH4+ efficiencies. Microalgal growth was enhanced by the nanocomposite, reaching a density of 1.8 g/L. The resulting biomass had a high heating value of 18.32 MJ/kg. The ZnO/GAC nanocomposite maintained effective removal over four cycles. The treated greywater met reuse standards for toilet flushing, with pH 8.5, turbidity <4 NTU, and COD, NH4+, and PO43− of 34, 0.032, and 0.48 mg/L, respectively.

Explanation of the research in layperson’s terms

Water scarcity and pollution are serious problems, and our research aims to find an environmentally friendly way to treat greywater (wastewater from sinks, showers, etc.). We explored the use of algae combined with special nanoparticles (zinc oxide) to clean the water more effectively. The algae grow in the water and help remove harmful substances like carbon, phosphorus, and nitrogen. The nanoparticles make this process even more efficient.

After treatment, the water is clean enough to be reused, for example, in toilet flushing. This method not only helps clean wastewater but also provides a sustainable way to reuse it, which can reduce water consumption and help the environment.

Practical implementation/ Social implications of the research

Practical implementation

The system developed in this research can be implemented in decentralised greywater treatment units, especially in water-scarce areas. It provides a cost-effective, eco-friendly solution for treating household or industrial greywater. The treated water meets the quality standards for reuse in applications like toilet flushing or landscape irrigation, reducing freshwater demand.

Social implications

This research promotes water recycling, contributing to sustainable water management practices and helping to address water scarcity issues. This can improve access to water in communities with limited resources, reduce the pressure on freshwater supplies, and lower the environmental impact of wastewater discharge, leading to healthier ecosystems and communities. Additionally, adopting such systems on a larger scale can foster greater awareness of water conservation and responsible resource usage.

Dr Raviteja K, Assistant Professor in the Department of Civil Engineering, has recently authored a groundbreaking book entitled “Sustainable Materials in Civil Infrastructure.” This publication is set to become a valuable resource for professionals and students in the field, shedding light on the importance of sustainable practices in construction and infrastructure development. His expertise and dedication to promoting environmentally friendly solutions within the realm of civil engineering have culminated in this significant literary contribution. The book delves into the utilization of eco-conscious materials, innovative construction techniques, and the crucial role they play in creating a more sustainable future for infrastructure projects worldwide.

His work is anticipated to inspire a new wave of sustainable practices in the industry and drive positive change towards greener and more resilient civil infrastructure development. Congratulations to Dr. Raviteja K on this remarkable achievement that is sure to make a lasting impact in the field of civil engineering!

Publication details (incl. Publisher, ISBN, Launch date, Edition, etc):
Title: Sustainable Materials in Civil Infrastructure, Publisher: Elseveir, ISBN: 978-0-443-16142-1, Date: July 2024, doi: https://doi.org/10.1016/C2022-0-02477-6.

Brief Introduction the Book:
Sustainable Materials in Civil Infrastructure delves into cutting-edge advancements in eco-materials, offering solutions crucial for building resilient and sustainable infrastructure. It provides profound insights into pioneering research on eco-materials for construction, offering a comprehensive guide on recycled steel, low-carbon concrete, bioconcrete, self-healing concrete, and industrial by-products like fly ash and shape memory alloys. Chapters explore design applications of bioconcrete and the utilisation of eco-materials in landfill liners and masonry, while also addressing obstacles hindering the widespread adoption of green concrete and bioconcrete, proposing practical solutions. This book serves as a cornerstone for the development of sustainable design methodologies, embraced by environmental monitoring bodies worldwide.

Significance of Book
The book “Sustainable Materials in Civil Infrastructure” published by Elsevier is a pivotal resource in the field of sustainable engineering, particularly relevant to my work in developing solutions for geotechnical and geoenvironmental challenges at Sustainable Engineering Research Laboratory (SERL), SRM University AP.

The inclusion of topics such as bioconcrete and the utilization of eco-materials in landfill liners and masonry is particularly significant. Bioconcrete, for instance, exemplifies a pioneering approach by integrating biological processes into construction materials, thereby promoting sustainability and durability. Addressing obstacles to the widespread adoption of green concrete and bioconcrete is also crucial, as it underscores the practical challenges that need to be overcome for these materials to achieve mainstream acceptance.

For my research focus at SERL, this book serves as a cornerstone. It not only provides in-depth insights into the latest research and development in sustainable materials but also offers practical guidance on their design applications and integration into infrastructure projects. Moreover, the emphasis on sustainable design methodologies aligns perfectly with our laboratory’s mission to promote environmentally conscious practices in civil engineering.

Target Audience of the Book
The target audience of the book “Sustainable Materials in Civil Infrastructure” includes a wide range of professionals and researchers involved in civil engineering, sustainability, and materials science. Specifically, the book would be helpful and resourceful for:
Civil Engineers, Researchers and Academics, Environmental Engineers, Policy Makers and Regulatory Bodies, Students, Construction Industry Professionals, and Consultants.

Co-authors
The co-editors include: Thainswemong Choudhury, Lakhveer Singh and Elisa Bertolesi

The Link of the Book Publication