Water Treatment by Microfiltration and Ultrafiltration

Optimization of cleaning conditions on a polytetrafluoroethylene (PTFE) microfiltration membrane used in treatment of oil-field wastewater

“…23 As can be seen from Fig. 34,35 APAM, one of the main ingredients in the wastewater, was degraded by reacting with NaOCl according to the chemical reactions (4) to (8), which can be summarized to 3 phases, namely (1) chlorination of nitrogen ion in acylamino; (2) detachment of hydrogen ion and rearrangement of N-chlorinated anion; (3) conversion of formyl in polymer into amidogen. 26 Fig.…”

Cleaning ceramic membranes used in treating desizing wastewater with a complex-surfactant SDBS-assisted method

“…Carboxylic functional groups of organic foulants are deprotonated and solubility increases by nearly three orders of magnitude [40]. The role of NaClO as a swelling agent and protein solubilizer, in combination with its ability to break the chemical bonds between foulants and the membrane, makes it very effective [41]. Surfactants, such as SDBS, have both hydrophilic and hydrophobic groups.…”

Advances in water treatment by microfiltration, ultrafiltration, and nanofiltration

“…Flocculation and filtration processes are used to achieve three objectives: eliminating the penetration of colloidal particles into the membrane pores, increasing the critical flux, and modifying the characteristics of the deposits (Abdelrasoul et al, 2013;Kennedy et al, 2008).…”