Treatment of Textile Effluents by H₂O₂/UV Oxidation Combined with RO Separation for Reuse

Abstract

This study evaluates the feasibility of the treatment of textile effluents by H2O2/UV oxidation combined with reverse osmosis (RO) membrane separation for water reuse in textile dying processes. The results showed that the conductivity of textile effluents was from 2340 to 4560 micros/cm. Addition of auxiliary chemicals used during the dyeing processes increased the conductivity in textile wastewaters. The H2O2/UV pre-oxidation of textile effluents can mineralize or oxidize dissolved organic carbon (DOC) effectively. However, the removal of conductivity and hardness were poor. Pretreatment of the textile effluent by H2O2/UV oxidation can decrease silt density index (SDI) values and osmotic pressure and increase permeate flux when followed by RO separation. H2O2/UV pre-oxidation and RO post-treatment can improve the textile effluent quality and meet the water quality criteria for water reuse in the textile industry. In conclusion, the combined H2O2/UV pre-oxidation and RO post-process is a promising treatment for textile effluents for water reuse.

Disinfection by-product formation during seawater desalination: A review

“…Unlike chemical disinfection, UV light does not affect the biological stability of the water (Hijnen et al, 2006). Coupled with photocatalysts (e.g., H 2 O 2 , TiO 2 ), the UV process either oxidized or completely removed the model organic compounds (Kang et al, 2003;Al-Bastaki, 2003). Although UV disinfection of seawater is not as common as drinking water and wastewater treatment, UV/ TiO 2 had faster disinfection kinetics than only UV 254 light irradiation in a lab-scale experiment with synthetic seawater showing the effectiveness of photocatalytic treatment on seawater disinfection (Rubio et al, 2013).…”

New disinfectant to control biofouling of polyamide reverse osmosis membrane

“…In addition, numerous disinfection methods have been researched to reduce the degradation of polyamide RO membrane [23,24] and simultaneously control biofouling (i.e., monochloramine [25][26][27], chlorine dioxide [7,21], UV irradiation [28,29], ozone, and 2,2-dibromo-3-nitrilopropionamide (DBNPA) [30]). Despite various studies on alternative disinfectants, limitations in use of these disinfectants still exist.…”

Dye wastewater treated by Fenton process with ferrous ions electrolytically generated from iron-containing sludge

“…Although, no unified water reused standard, which might vary from plant to plant and from industry to industry, has been proposed, conductivity parameter is usually listed [17][18][19]. The conductivities of the treated water ranging from 1.0 to 67.8 mS are shown in Table 2, posing problem to recycle and reuse the treated water.…”