Photocatalytic degradation of poultry wastewater using activated carbon-supported titanium dioxide

Abstract

A B S T R A C TPhotocatalytic degradation of real-time poultry wastewater was investigated in a lab-scale batch reactor equipped with low-pressure submergible UV lamp(s). The experiments were conducted using slurry TiO 2 (Slurry-TiO 2 ) and activated carbon (AC)-supported TiO 2 (granular and powdered), i.e. GAC-TiO 2 and PAC-TiO 2 . The TiO 2 coatings on the GAC and PAC surfaces were confirmed by using scanning electron microscopy coupled with energy dispersive spectroscopy.Among the systems investigated, GAC-TiO 2 and PAC-TiO 2 photocatalytic systems produced 100% total solids, total volatile solids and biochemical oxygen demand (BOD) removals under 14 W and 56 W UV irradiation within 180 min of reaction. In contrast, complete destruction of organics was not achieved in the photolytic experiments conducted with 56 W UV irradiation even after 240 min of reaction. The firstorder reaction kinetics was adopted to estimate and compare the rate of BOD removal in the systems. A maximum BOD removal rate constant of 0.987 min −1 and a maximum BOD removal rate of 320 mg/L/min were observed in 56 W GAC-TiO 2 system. The BOD removal rate observed in 14 W GAC-TiO 2 (227 mg/L/min) and PAC-TiO 2 (247 mg/L/min) systems were comparable; however, GAC-TiO 2 was recovered effectively compared to PAC-TiO 2 . At the same time, photocatalytically treated poultry wastewater using both GAC-TiO 2 and PAC-TiO 2 was found to be free from coliforms.

TiO2-High Surface Area Materials Based Composite Photocatalytic Nanomaterials for Degradation of Pollutants: A Review

“…So, immobilization of P25 TiO 2 on AC support decreasing the self-photoactivity of AC (antagonist effect), may be attributed to the drop in the porosity of the composite and blockage of photoactive centers in the AC support after immobilization of P25 TiO 2 [52]. In the same way, diverse research articles were reported on the preparation of TiO 2 /AC composites using commercially available AC for decomposition of various pollutants [53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72] and summarized in Table 1.…”

An Innovative Solution for the Treatment of Poultry Industry Wastewater With Advanced Hybrid Technology Sono-Photocatalysis

“…Recently, several advanced oxidation processes (AOPs) have been explored for the treatment of PSWW, i.e., electrocoagulation Emerick et al, 2020), Fenton (Cui et al, 2021), electro-Fenton (Zhang et al, 2020), ultrasound (Abdelhay et al, 2020) and photocatalysis (Samsudin et al, 2019;Asha and Kumar, 2015); however, to the best of our knowledge, there has yet been no published researches have been established on the synergistic effect of combined photocatalysis and sonolysis processes called "sono-photocatalysis" (SPC) for the PSWW treatment. The hybrid SPC technique has gained much popularity to perfectively degrade all kinds of pollutants in extending the photogenerated electron-hole transfer pathway owing to easy operational, cheapness, and rapid pollution-free technology (Khan et al, 2022;Karim and Shriwastav, 2020;Fan et al, 2022).…”