Article
Environmental Sciences
Yajun Wang, Yanchao Xu, Siyong Zhang, Yanjuan Li, Wenlong Liu
Summary: This study thoroughly analyzed the effects of PAC dosage on the performance of PAC-MBRs in treating biochemical tailwater. The results showed that PAC addition enhanced the removal efficiency of MBRs, especially for total nitrogen. Furthermore, PAC application prolonged the duration of membranes by suppressing biological fouling.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biotechnology & Applied Microbiology
Hua-Jun Feng, Long Chen, Xian-Bin Ying, Sheng-Song Yu, Yang-Cheng Ding
Summary: The effects of PAC with different redox properties on membrane fouling were investigated, and it was found that PAC with reductive properties could prolong the filtration cycle and enhance the anti-fouling performance mainly by reducing the content of extracellular polymer substances and soluble microbial products in the solution.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Linda Li, Wayne Parker
Summary: The study assessed the performance of anaerobic membrane bioreactors (AnMBRs) at low temperatures commonly found in temperate climates (10-24 degrees C). It was found that as temperature decreased, COD removal and membrane fouling deteriorated. Addition of PAC reduced permeate VFA concentrations and mitigated membrane fouling at 10 degrees C.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Engineering, Environmental
Saleh Najafi Chaleshtori, Mehrdad Shamskilani, Azadeh Babaei, Masoomeh Behrang
Summary: This study investigated the performance of microalgal-activated sludge membrane bioreactor (MAS-MBR) as a self-biological treatment or post-treatment for conventional biological treatments. The results showed that cultivating mixed algae/sludge in raw wastewater achieved the best performance in terms of ammonium and phosphorus removal efficiency, as well as the highest oxygen production rate and oxygen uptake rate. However, membrane fouling was increased in this case, highlighting the need for regular membrane cleaning.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Mary Vermi Aizza Corpuz, Laura Borea, Vincenzo Senatore, Fabiano Castrogiovanni, Antonio Buonerba, Giuseppina Oliva, Florencio Ballesteros, Tiziano Zarra, Vincenzo Belgiorno, Kwang-Ho Choo, Shadi W. Hasan, Vincenzo Naddeo
Summary: The study showed that the addition of algae in membrane bioreactors can significantly improve nutrient removal and reduce membrane fouling rate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Mohammad Reza Mehrnia, Fatemeh Nasiri, Fatemeh Pourasgharian Roudsari, Fatemeh Bahrami
Summary: This study investigated the utilization of powdered activated carbon (PAC) in the formation and performance of a self-forming dynamic membrane for wastewater treatment. The results showed that PAC helped in the formation of more uniform and permeable dynamic membranes, reducing biofouling. The optimal PAC concentration was found to be 4 g/L, with the highest effluent quality and the lowest biofouling. The short-term performance of the hybrid PAC-DMBR showed significant improvements in effluent quality. Thus, adopting hybrid PAC-DMBR has the potential to alleviate biofouling and reduce capital costs.
Article
Green & Sustainable Science & Technology
Jianbo Liu, Faqian Sun, Panyue Zhang, Yan Zhou
Summary: The study introduced a novel APQ bead technology, which effectively alleviated MBR biofouling by reducing concentrations of EPS and AHL, extending operational period. This technology showed potential for biofouling control.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Xin Mao, Jing Shen, Yu Shen, Wenxin Shi, Bing Zhang
Summary: This study proposed and applied an innovative heat/PAC/PS pre-treatment system in an AGSMS, which effectively enhanced pollutant removal and reduced membrane fouling resistance. The excellent performance of the heat/PAC/PS system was attributed to PAC adsorption capacity and non-radical oxidation pathway. This study provides a new approach for membrane fouling mitigation in municipal wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Fangyue Peng, Zhaohan Zhang, Muchen Sun, Yuqiang Shao, Yujie Feng
Summary: Magnetic granular activated carbon (MGAC) was used to enhance domestic wastewater treatment efficiency and reduce membrane biofouling in an anaerobic fluidized-bed membrane bioreactor (AFMBR). The COD removal rate reached 89 +/- 2.6% with an effluent concentration of 20 +/- 3.9 mg/L in the MGAC-AFMBR, compared to 28 +/- 5.2 mg/L in the AFMBR without MGAC. TN removal was also improved by 4.0% with the addition of MGAC. The addition of MGAC resulted in decreased protein and polysaccharide content in extracellular polymeric substances (EPS), as well as reduced abundance of Bacteroidetes and Proteobacteria in the membrane cake layer.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jingxin Shi, Jiahui Wang, Shuhui Yang, Siqi Li, Jingchun Liu
Summary: This study investigated the mechanisms of membrane fouling in a commercial ceramic flat membrane bioreactor. It was found that the duration of backwash, charged particles, and suspended solids content are important factors influencing membrane fouling. Adjusting operating parameters and using appropriate cleaning methods can effectively reduce membrane fouling.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Jin Hyung Noh, Ji Won Park, Soohoon Choi, Sungpyo Kim, Sung Kyu Maeng
Summary: This study found that the addition of powdered activated carbon or calcium significantly reduced the formation potential of trihalomethane in hybrid membrane bioreactors, but high levels of trihalomethane exposure had toxic effects on zebrafish embryos and larvae, leading to behavioral and visual organ damage. Further research is needed to understand the mechanism behind trihalomethane toxicity.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Adem Yurtsever, Erkan Basaran, Deniz Ucar, Erkan Sahinkaya
Summary: The study investigated the robustness of AnDMBR for synthetic textile wastewater treatment, finding that in the absence of sulfate addition, the removal rate of total COD and filtered COD was 91% and 93% respectively, but decreased to 79% after sulfate addition. The suspended solids concentration in textile wastewater was low, while the dye removal rate was high.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Yu Shen, Xin Mao, Fang Liu, Wenjie Yin, Wenxin Shi, Bing Zhang
Summary: The study compared the effects of heat/Fe2+/persulfate (PS) and heat/powdered activated carbon (PAC)/PS systems on membrane fouling mitigation. It was found that heat/Fe2+/PS showed better control of membrane fouling by generating sulfate radicals and Fe3+. Heat/PAC/PS, on the other hand, mitigated fouling through a non-radical effect and efficiently removed COD and suspended solids.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Le Liu, Yisong Hu, Yi Qu, Dongxing Cheng, Yuan Yang, Rong Chen, Jiayuan Ji
Summary: Developing low-carbon advanced processes for sustainable wastewater treatment is crucial for increasing bioenergy recovery and reducing greenhouse gas effects. This study investigated the influence of adding granular activated carbon (GAC) on the performance of a lab-scale anaerobic dynamic membrane reactor (AnDMBR) used to treat real domestic wastewater. The results showed that adding GAC improved the removal efficiency of chemical oxygen demand and turbidity, as well as increased methane production. The integration of GAC and the AnDMBR process proved to be a cost-effective and promising alternative for domestic wastewater treatment and bioenergy recovery.
Article
Engineering, Chemical
Sijia Yu, Jingwei Wang, Zhiping Zhao, Weiwei Cai
Summary: This study proposes a method that combines fluidized granular activated carbon (GAC) and PAC with the UF process to improve water treatment efficiency. The results show that fluidized GAC particles effectively remove PAC deposition and fouling. PAC improves the effluent quality by adsorbing humic acid-like substances, and the energy consumption of GAC fluidization is lower compared to conventional fouling control methods in UF. This integrated GAC-PAC-UF process is technically feasible and economically viable, potentially achieving high permeate quality and reducing membrane fouling.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
