Ahmad Ramli Mohd Yahya, Associate Professor

Biosurfactants, such as glycolipids and lipopeptides, are vital in bioremediation due to their ability to enhance the breakdown of pollutants. Microorganisms like Streptomyces and Pseudomonas aeruginosa can produce these compounds in a bioreactor under submerged culture conditions. A fed-batch system optimizes their production when working with immiscible substrates, improving efficiency. Agricultural waste serves as a cost-effective medium for biosurfactant synthesis, promoting sustainability. By harnessing these microbial processes, industries can develop eco-friendly solutions to mitigate environmental contaminants while repurposing organic waste into valuable products, reinforcing the role of biotechnology in sustainable environmental management.

Research focus
Biosurfactant production, Recovery, Concentration and purification

Selected publications

1. Md Noh N.A., Mohd Salleh S., Yahya A.R.M., Enhanced rhamnolipid production by Pseudomonas aeruginosa USM-AR2 via fed-batch cultivation based on maximum substrate uptake rate (2014) Letters in Applied Microbiology, 58 (6), pp. 617 - 623. DOI: 10.1111/lam.12236
   https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901056305&doi=10.1111%2flam.12236&partnerID=40&md5=fba0237413c05aff0944063bad03b947
2. Zulkhifli N.A.M., Solong D.R., Yahya A.R.M., Noh N.A.M. Extended biosynthesis of rhamnolipid by immobilized Pseudomonas aeruginosa USM-AR2 cells in a fluidized bed bioreactor (2023) Letters in Applied Microbiology, 76 (5). DOI: 10.1093/lambio/ovad059
   https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193381270&doi=10.1093%2flambio%2fovad059&partnerID=40&md5=209b0daf49f0e718eb237a5c0aad584f
3. Jasme N., Md Noh N.A., Yahya A.R.M. Lab-scale bioremediation technology: Ex-situ bio-removal and biodegradation of waste cooking oil by Aspergillus flavus USM-AR1 (2023) Bioremediation Journal, 27 (3), pp. 208 - 228 DOI: 10.1080/10889868.2022.2054929
   https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129227985&doi=10.1080%2f10889868.2022.2054929&partnerID=40&md5=f7eba7f0af78f16e32d552a3ce64bc07
4. Mohamad Shukri I.A., Mohd Yahya A.R., Mohd M.H., Md Noh N.A. Rhamnolipids as an antifungal agent against Rhizoctonia solani USM-PD2 causing sheath blight disease of paddy (2025) Biocatalysis and Agricultural Biotechnology, 64, art. no. 103511. DOI: 10.1016/j.bcab.2025.103511
   https://www.scopus.com/inward/record.uri?eid=2-s2.0-85217193833&doi=10.1016%2fj.bcab.2025.103511&partnerID=40&md5=c0dab0d7f91b153cc261d9bee33347f2