Oil and grease (O&G) removal from commercial kitchen waste water using carbonised grass as a key mediaSiti Nazahiyah Rahmat, Ahmad Zurisman Mohd Ali, Mohd Haziman Wan Ibrahim and Nur Azrena AliasMATEC Web Conf., 87 (2017) 01010DOI: https://doi.org/10.1051/matecconf/20178701010