Clement Oguche Ataguba and Isobel Brink 2022. A comparison of oil and grease removal from automobile workshop stormwater runoff using gravel, granular activated carbon, rice husk and conventional oil and grease (O&G) trap. Water SA. 48, 1 January (Jan. 2022). DOI:https://doi.org/10.17159/wsa/2022.v48.i1.3926.