This study examined the influence of greywater constituents on the fouling behaviour of submerged\udhollow fibre UF membranes during greywater treatment for recycling purposes. Experiments were\udcarried out on a bench-scale equipment using a Zenon ZW1 module. The membrane was operated\udunder constant flux where an increase in transmembrane pressure was used to determine the extent\udof fouling. Wastewater constituent variables used in this study were kaolin, cellulose, humic acid,\udsurfactant, and calcium concentration. Results indicate that during filtration of synthetic greywater\udmultivalent ions like calcium played an important role. Depending on concentration agglomerates\udof different structure and size were formed and the structure and size determined the extent of\udfouling and retention. It was also shown that the surfactant sodium dodecyl sulphate (SDS) may\udcause fouling through particle stabilisation and strongly interacts with calcium enhancing calcium\udretention especially in the critical micelle concentration (cmc) region. It is hypothesized that SDS\udcompetes with humic acids (HAs) for adsorption sites resulting in lower UV254nm retention. Solution\udchemistry and cake deposition also influence the retention and hence product water quality.
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