A Sustainable Water Treatment Solution with GreenFloc
- UM Research
- 13 minutes ago
- 4 min read
By transforming industrial waste into a biodegradable bio-flocculant, researchers at Universiti Malaya are paving the way for cleaner water treatment and a more circular economy.
As industries around the world pursue greener production methods, managing the waste generated by these processes has become an equally pressing challenge. In the biodiesel industry, one such waste stream is glycerin pitch (GP), a viscous, organic-rich residue produced during biodiesel refining. Although generated in substantial quantities, GP has long been regarded as a low-value by-product, with limited commercial applications and costly disposal requirements.
At the same time, industries ranging from municipal wastewater treatment to food processing and aquaculture depend heavily on flocculants to remove suspended particles from water. These chemicals play a crucial role in improving water quality, but many conventional flocculants are synthetic, non-biodegradable, and may introduce secondary pollutants into the environment. As environmental regulations become increasingly stringent and industries seek more sustainable solutions, the search for environmentally friendly alternatives has never been more important.
Recognising these two interconnected challenges, Prof. Ir. Dr. Adeline Chua Seak May and her research team at Universiti Malaya developed GreenFloc, a bio-based flocculant that transforms industrial waste into a high-value product for sustainable water treatment.
The Science Behind GreenFloc
Unlike conventional chemical flocculants, GreenFloc is produced from extracellular polymeric substances (EPS), naturally occurring biopolymers secreted by microorganisms. Composed primarily of polysaccharides and proteins, these substances possess functional groups that enable them to bind and aggregate suspended particles, allowing impurities to settle and be removed efficiently from water.
Transforming Waste into a Valuable Resource
The innovation behind GreenFloc lies not only in its biodegradable nature but also in how it is produced.
Instead of relying on expensive purified materials, the research utilises glycerin pitch as the primary carbon source to cultivate mixed microbial cultures (MMC). These diverse microbial communities can adapt to variations in waste composition while continuously producing EPS under non-sterile conditions. This approach significantly reduces operational complexity and production costs, making the technology more practical for industrial-scale implementation.
To maximise efficiency, the research team developed a bioconversion process that selectively enriches microorganisms capable of producing high quantities of EPS. By carefully optimising operating conditions, including organic loading rates, the system effectively converts GP into GreenFloc while achieving approximately 62 per cent EPS production.
Delivering Effective Wastewater Treatment
Beyond demonstrating an innovative production process, GreenFloc has also shown promising performance in practical applications. Tests conducted using real industrial and municipal wastewater samples demonstrated turbidity and suspended solids removal efficiencies of up to 88 per cent. Such performance positions GreenFloc as a viable alternative to conventional chemical flocculants while offering additional environmental benefits through biodegradability and low toxicity.
Advancing the Circular Economy
The significance of GreenFloc extends beyond wastewater treatment alone. By converting industrial waste into a valuable bio-based material, the technology exemplifies the principles of the circular economy, where waste is transformed into resources rather than discarded. This dual benefit addresses both waste management and water treatment challenges simultaneously, contributing to more sustainable industrial practices.
Beyond wastewater treatment, GreenFloc also demonstrates potential for broader applications, including sludge dewatering and soil conditioning. This versatility expands its potential impact across multiple sectors where efficient and environmentally responsible flocculation processes are essential.
As global demand for clean water continues to grow alongside increasing environmental awareness, innovations such as GreenFloc demonstrate how biotechnology can transform industrial challenges into sustainable opportunities. Rather than viewing industrial by-products as waste requiring disposal, GreenFloc illustrates how these materials can become valuable resources that support cleaner production, resource recovery, and environmental stewardship.
By combining microbial biotechnology, waste valorisation, and sustainable engineering, Prof. Ir. Dr. Adeline Chua Seak May's research offers a practical example of how scientific innovation can address multiple environmental challenges through a single integrated solution. GreenFloc represents more than a biodegradable flocculant. It embodies a shift towards circular resource management, where waste becomes the foundation for technologies that protect both industry and the environment.
Behind the Innovation
Reflecting on the journey behind the development of GreenFloc, Prof. Adeline acknowledged the dedication and perseverance of her research team, particularly her students. "Behind every innovation are countless experiments, failures and refinements," she said, recognising the hard work and commitment that transformed an ambitious idea into a practical and sustainable solution.
As research continues towards wider industrial adoption and commercial deployment, GreenFloc has the potential to reduce dependence on conventional chemical flocculants while enabling industries to meet increasingly stringent environmental standards. In doing so, it reinforces Universiti Malaya's commitment to developing research that not only advances scientific knowledge but also delivers tangible benefits for society and the environment.
Researcher Featured:
Professor Ir. Dr. Adeline Chua Seak May
Department of Chemical Engineering,
Faculty of Engineering, Universiti Malaya
For inquiries, please contact:
T: +603-79675291
WOS Researcher ID: https://www.webofscience.com/wos/author/record/B-8138-2010
Author:
Ms Priscilla Diniesha
Priscilla Diniesha is an MA student in English Literature who has a deep passion for language and writing. When she landed a job in copywriting and unlocked skills she never knew she had, she realized it was her calling after all.
Copyedit:
Siti Farhana Bajunid Shakeeb Arsalaan Bajunid, Assistant Registrar, UM
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