Article
Engineering, Environmental
N. J. Lakshmi, C. Agarkoti, Parag R. Gogate, Aniruddha B. Pandit
Summary: This study investigates the effectiveness of hybrid treatment techniques involving cavitation combined with AOPs in treating industrial effluent containing recalcitrant pharmaceutical pollutants. The study found that the AC/Fe(II)/H2O2 system achieved a high COD reduction rate under specific operating conditions. The HC/Fe(II)/H2O2 system also achieved a high COD reduction rate under specific conditions. Additionally, the study compared the kinetic rate constants and treatment costs of different methods.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Woongbae Lee, Sangki Choi, Hyunjin Kim, Woorim Lee, Minju Lee, Heejong Son, Changha Lee, Min Cho, Yunho Lee
Summary: This study assessed and compared the efficiencies of ozonation and ozone with hydrogen peroxide for the removal of organic micropollutants (OMPs), as well as the inactivation of bacteria and viruses, and the formation of bromate and biodegradable organics in municipal wastewater effluent. The results showed that ozonation effectively eliminated 39 OMPs, with 22 OMPs achieving a removal rate of 54 ± 14% at an ozone dosage of 0.5 gO(3)/gDOC. The concentration and exposure time of ozone were positively correlated with microbial inactivation levels, and O-3/H2O2 minimized bromate formation but decreased bacteria/virus inactivation. Ozonation also produced biodegradable organics, which could be removed through post-biodegradation treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Giada Rossi, Matia Mainardis, Eleonora Aneggi, Linda K. Weavers, Daniele Goi
Summary: The study explores the potential of low-frequency ultrasound coupled with ozone process for disinfecting municipal wastewater while preserving nutrients, aiming at possible reuse in different sectors. The results show promising removal efficiency for various contaminants and high disinfection performance, highlighting the value for agricultural reuse and potential savings on chemical fertilizers. Further studies are needed to evaluate the feasibility of scaling up the system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Hassimi Abu Hasan, Dheenesh Sai Annanda Shanmugam, Siti Rozaimah Sheikh Abdullah, Mohd Hafizuddin Muhamad, Setyo Budi Kurniawan
Summary: The coffee processing industry produces toxic and low biodegradable effluent, which can pollute water bodies. This study investigated the use of a dual-media biofilm reactor for real coffee effluent treatment, and compared it with a control biofilm reactor using sand media. The results showed that the dual-media biofilm reactor had the highest removal of chemical oxygen demand and NH4+-N, and the combination of sand and HEX media encouraged the growth of various bacterial species.
Article
Engineering, Environmental
Syahida Farhan Azha, Suzylawati Ismail
Summary: A novel adsorbent-based coating with zwitterionic functionality (ZwitAd) was successfully employed to treat heavily polluted hand-drawn batik industrial effluent, reducing COD and color intensity, stablizing pH in compliance with industrial effluent regulations, while minimizing operational costs and secondary waste generation.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Sangbin Lee, Hassan Anwer, Jae Woo Park
Summary: Nanobubble and ultrasonic cavitation were used to enhance oxidation reactions of ozonation, with nanobubbles increasing ozone dissolution by a factor of 16 and ultrasonic cavitation generating hydrogen peroxide. The process achieved significant improvements in both the loss of emitted ozone and radical recombination, demonstrated by the decomposition of rhodamine B. The combination of nanobubble and ultrasonic cavitation sustained oxidizing power by continuous dissolution of ozone and successive radical generation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Reza Irani, Ali Baradar Khoshfetrat, Mojtaba Forouzesh
Summary: A study on the removal of COD, ammonium, and total coliforms from real municipal wastewater using a combination of biological attached growth reactor and simultaneous pre and post-ozonation processes showed promising results with complete ammonium removal and 94% COD removal achieved. The ozonation process was found to be the main energy consumption source in the treatment system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Wei Shi, Xiaojing Liu, Yulei Liu, Dong Li, Xili Tong, Jun Ma, Lu Wang
Summary: The effect of a robust and easy-recovery catalyst, Fe2O3/Al2O3-SiC, for catalytic ozonation of hardly biodegradable COD in coking wastewater was explored. The catalyst showed a higher removal ratio of hard COD and generation speed of hydroxyl radical compared to ozonation alone. In a full-scale application, Fe2O3/Al2O3-SiC catalytic ozonation decreased ozone consumption and operation cost.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Sugali Chandra Sekhar, Sajja. S. Chandrasekhar, Shrisha, Shanmugham Venkatachalam Srinivasan, Sundergopal Sridhar
Summary: A hydrophilized polyvinyl pyrrolidone/polyamide composite high rejection reverse osmosis (HPA-HR RO) membrane was used for the treatment of aroma chemicals containing effluent coming as multiple effect evaporators (MEE) condensate at UK Aromatics Pvt. Ltd., Boisar, Maharashtra. The membrane effectively removed total dissolved solids (TDS) and color from the feed water, with a rejection rate of more than 95%. The recovered permeate water was reused in various industrial applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Ashraful Islam, Guangxi Sun, Wei Shang, Xingcan Zheng, Pengfeng Li, Min Yang, Yu Zhang
Summary: This study utilized various techniques to characterize colored DOM in wastewater, finding that HPOA and HPI substances are abundant in colorants and HPI-type colorants are more resistant to removal by GAC and O-3 individually. FRI-based EEMs showed that F-3 and F-5 are the major contributors to the yellowish color in biological effluent, with different proportions in effluents treated with different methods.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Multidisciplinary Sciences
Qingqing Xu, Shengqiang Chen, Lingdong Jiang, Chao Xia, Lingting Zeng, Xiaoqing Cai, Zhaokui Jin, Shucun Qin, Wenjiang Ding, Qianjun He
Summary: A concept of sonocatalytic hydrogen/hole-combined 'inside/outside-cooperation' anti-biofilm is proposed for efficient eradication of biofilm. The concept involves the use of two-dimensional piezoelectric nanomaterials to promote bacteria-infected diabetic wound healing by inhibiting bacterial energy metabolism and destroying the bacterial membrane/electron transport chain. In vivo experiments have shown that this sonocatalytic therapy significantly improves bacteria-infected diabetic wound healing, making it a promising strategy for deep-seated biofilm infection treatment.
NATIONAL SCIENCE REVIEW
(2023)
Article
Environmental Sciences
C. Navas-Cardenas, S. Rajendran, T. Ramirez, F. Munoz
Summary: The combination of sedimentation, electrocoagulation, and ozonation processes was found to effectively treat wastewater from a medium-density fiberboard panel industry. By adjusting parameters such as residence time and current density, high removal rates for pollutants were achieved. Furthermore, the combined treatment improved the biodegradability of the wastewater.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Lam Thanh Phan, Heidemarie Schaar, Ernis Saracevic, Jorg Krampe, Norbert Kreuzinger
Summary: The study found that ozonation led to a dose-dependent increase in biological activity, particularly for substances that are recalcitrant to biodegradation. Additionally, ozonation enhanced the degradation potential of COD and BDOC, while also partially mineralizing organic compounds. These results suggest that a combination of ozonation and biological post-treatment can contribute to sustainable water resource management by reducing biodegradable organic carbon emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Lele Cui, Bin Chen, Longshun Zhang, Chen He, Chen Shu, Hongyu Kang, Jian Qiu, Wenheng Jing, Kostya (Ken) Ostrikov, Zhenghua Zhang
Summary: This study demonstrates an anti-electrowetting carbon film electrode with self-sustained aeration, which is assembled using structurally discontinuously fractured conventional electrocatalyst films. It achieves highly selective and durable electrochemical two-electron oxygen reduction, providing a promising direction for developing cheap and scalable metal-free electrodes for industry-scale H2O2 electrosynthesis.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Chemical
Debora Antonio da Silva, Rodrigo Pereira Cavalcante, Eric Batista Barbosa, Amilcar Machulek Junior, Silvio Cesar de Oliveira, Renato Falcao Dantas
Summary: This study investigated the use of advanced oxidation processes (AOPs) combined with granular activated carbon (GAC) to treat secondary effluents. The results showed that the O-3-GAC-O-3 configuration was the most efficient in removing organic matter, while all systems were effective in disinfecting the samples. However, samples treated with the UV/H2O2-GAC-UV/H2O2 method exhibited acute toxicity, cytotoxicity, and genotoxicity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)