Continuous-Flow Grafting of LENFLOC™ Coagulant for Water Treatment toward Circular Economy

This study investigated the efficiency of LENFLOC™ production using a microwave-assisted continuous-flow grafting process. The study discussed the contribution of plant-based coagulants for water and wastewater treatment toward the circular economy in water treatment. Lentil waste extract was used to produce LENFLOC™ using (2-methacryloyloxyethyl) trimethyl ammonium chloride with 75 wt.% on H2O as a chain monomer and cerium ammonium nitrate (≥98%) as an initiator. The continuous flow grafting process was conducted at a constant flowrate of 60 mL/min and reaction time of 30 s. The process was optimised using RSM to obtain optimum conditions of process factors. Characterisation studies were conducted using Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray. A comparison study was performed using a Jar test with LENFLOC™, lentil waste extract, and a polymer as coagulants. The results obtained show that the continuous-flow grafting process was efficient with an optimum grafting percentage of 330%. The characterisation studies confirmed the grafting process. A 99% turbidity removal rate was achieved with LENFLOC™ as a coagulant with a lower dosage compared to the lentil waste extract. Furthermore, microscope imaging showed improved floc compaction when using LENFLOC™ as a coagulant. The continuous-flow grafting process has been shown to be effective; therefore, its potential for upscaling the process is possible.

[1]  P. Show,et al.  Evaluation of Annona diversifolia Seed Extract as A Natural Coagulant for Water Treatment , 2023, Sustainability.

[2]  J. Hofman,et al.  Circular Water Economy in the EU: Findings from Demonstrator Projects , 2022, Clean Technologies.

[3]  D. Nguyen,et al.  A critical review on pineapple (Ananas comosus) wastes for water treatment, challenges and future prospects towards circular economy. , 2022, The Science of the total environment.

[4]  Peng Wang,et al.  Immobilized N-C/Co derived from ZIF-67 as PS-AOP catalyst for effective tetracycline matrix elimination: from batch to continuous process , 2022, Chemical Engineering Journal.

[5]  V. Parida,et al.  Linking circular economy and digitalisation technologies: A systematic literature review of past achievements and future promises , 2022, Technological Forecasting and Social Change.

[6]  Stefania Munaretto,et al.  Circular Economy of Water: Definition, Strategies and Challenges , 2022, Circular Economy and Sustainability.

[7]  P. Carvalho,et al.  Nature-based solutions coupled with advanced technologies: An opportunity for decentralized water reuse in cities , 2022, Journal of Cleaner Production.

[8]  Hasan Volkan Oral,et al.  Nature-based solutions addressing the water-energy-food nexus: Review of theoretical concepts and urban case studies , 2022, Journal of Cleaner Production.

[9]  E. Mazur-Wierzbicka.  Circular economy: advancement of European Union countries , 2021, Environmental Sciences Europe.

[10]  E. Mazur-Wierzbicka.  Towards Circular Economy—A Comparative Analysis of the Countries of the European Union , 2021, Resources.

[11]  V. Gude,et al.  Transitioning Wastewater Treatment Plants toward Circular Economy and Energy Sustainability , 2021, ACS omega.

[12]  G. Mannina,et al.  Enhancing a Transition to a Circular Economy in the Water Sector: The EU Project WIDER UPTAKE , 2021 .

[13]  Qunhui Wang,et al.  Investigation and Optimization of Chitosan Performance in Flocculating Kaolin Suspensions Using a Real-Time Suspending Solid Concentration Measuring Method , 2021, Water.

[14]  P. Show,et al.  Lentil waste as novel natural coagulant for agricultural wastewater treatment. , 2020, Water science and technology : a journal of the International Association on Water Pollution Research.

[15]  S. La Grutta,et al.  Assessing repeatability and reproducibility of Anterior Active Rhinomanometry (AAR) in children , 2020, BMC Medical Research Methodology.

[16]  P. Show,et al.  Microwave radiation-induced grafting of 2-methacryloyloxyethyl trimethyl ammonium chloride onto lentil extract (LE-g-DMC) as an emerging high-performance plant-based grafted coagulant , 2020, Scientific Reports.

[17]  Fulvio Ardente,et al.  Advances towards circular economy policies in the EU: The new Ecodesign regulation of enterprise servers , 2020, Resources, conservation, and recycling.

[18]  M. Baumann,et al.  A Perspective on Continuous Flow Chemistry in the Pharmaceutical Industry , 2020, Organic Process Research & Development.

[19]  Milad Abolhasani,et al.  Role of continuous flow processes in green manufacturing of pharmaceuticals and specialty chemicals , 2019, Current Opinion in Chemical Engineering.

[20]  M. Malek,et al.  Red Lentil (Lens culinaris) Extract as a Novel Natural Coagulant for Turbidity Reduction: An Evaluation, Characterization and Performance Optimization Study , 2019, Water.

[21]  Y. Hung,et al.  Potential Use of Dimocarpus longan Seeds as a Flocculant in Landfill Leachate Treatment , 2018, Water.

[22]  S. Arumugasamy,et al.  Treatment of palm oil mill effluent (POME) using chickpea (Cicer arietinum) as a natural coagulant and flocculant: Evaluation, process optimization and characterization of chickpea powder , 2018, Journal of Environmental Chemical Engineering.

[23]  A. Zydney,et al.  Polyacrylamide degradation and its implications in environmental systems , 2018, npj Clean Water.

[24]  Nicolas Faivre,et al.  Nature‐Based Solutions in the EU: Innovating with nature to address social, economic and environmental challenges , 2017, Environmental research.

[25]  C. Oliver Kappe,et al.  Why flow means green – Evaluating the merits of continuous processing in the context of sustainability , 2017 .

[26]  F. Shahbazi,et al.  Mechanical damage to green and red lentil seeds , 2017, Food science & nutrition.

[27]  O. S. Bello,et al.  Preparation and characterization of a novel adsorbent from Moringa oleifera leaf , 2017, Applied Water Science.

[28]  H. Rusinek,et al.  DCE‐MRI of the liver: Effect of linear and nonlinear conversions on hepatic perfusion quantification and reproducibility , 2014, Journal of magnetic resonance imaging : JMRI.

[29]  F. Momani,et al.  Measurement of polyacrylamide polymers in water and wastewater using an in-line UV–vis spectrophotometer , 2014 .

[30]  C. Wiles,et al.  Continuous process technology: a tool for sustainable production , 2014 .

[31]  John Bratby,et al.  Coagulation and Flocculation in Water and Wastewater Treatment , 2008 .

[32]  C. Oliver Kappe,et al.  Microwave‐Assisted Synthesis under Continuous‐Flow Conditions , 2007 .

[33]  A S Carney,et al.  Reliable and reproducible anterior active rhinomanometry for the assessment of unilateral nasal resistance. , 2000, Clinical otolaryngology and allied sciences.

[34]  Nature-Based Solutions for Flood Mitigation: Environmental and Socio-Economic Aspects , 2022, The Handbook of Environmental Chemistry.

[35]  A. Cervin,et al.  Can we always trust rhinomanometry? , 2011, Rhinology.