Table 2.
Factors affecting membrane fouling.
| Factor | Influence | Type of Wastewater |
|---|---|---|
| Membrane structure properties | The formation of the cake layer can be observed in the organic fouling, and inorganic fouling did not easily cause membrane fouling. | - |
| The protein in the EPS was more than the polysaccharide, and the viscosity of the liquid increased. | Hot white pulp wastewater | |
| Material characteristics | Increased SMP, increased filtration resistance, and deterioration of membrane due to fouling. | Domestic wastewater |
| Supernatant SMP had more protein than polysaccharides, the viscosity increased, and the cake layer was easy to form. | Industrial waste | |
| When SRT increased, SMP and sludge viscosity increased. | Low concentration wastewater | |
| Operating condition | At 30 and 50 d, the activated sludge floc increased, the low fouling rate SRT was too small, the SMP increased, and the fouling accelerated. | Municipal wastewater |
| If it was too large, MLSS, SMP and other microbial products increased. | - | |
| HRT declined, protein substances in SMP increased, and EPS concentration increased. | Low concentration wastewater | |
| HRT decreased, filtration resistance increased, and granular sludge particle size decreased. | Artificial wastewater | |
| Small flocs increased under high temperature conditions, SMP, EPS increase, filter cake layer was easy to form | Evaporator condensate | |
| When the temperature went up, the membrane fouling resistance increased, and the protein content in EPS increased. | Hot pulping press |