|
1
|
Banti DC, Samaras P, Kostopoulou E, Tsioni V, Sfetsas T. Improvement of MBBR-MBR Performance by the Addition of Commercial and 3D-Printed Biocarriers. MEMBRANES 2023; 13:690. [PMID: 37623751 PMCID: PMC10456846 DOI: 10.3390/membranes13080690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/07/2023] [Accepted: 07/21/2023] [Indexed: 08/26/2023]
Abstract
Moving bed biofilm reactor combined with membrane bioreactor (MBBR-MBR) constitute a highly effective wastewater treatment technology. The aim of this research work was to study the effect of commercial K1 biocarriers (MBBR-MBR K1 unit) and 3D-printed biocarriers fabricated from 13X and Halloysite (MBBR-MBR 13X-H unit), on the efficiency and the fouling rate of an MBBR-MBR unit during wastewater treatment. Various physicochemical parameters and trans-membrane pressure were measured. It was observed that in the MBBR-MBR K1 unit, membrane filtration improved reaching total membrane fouling at 43d, while in the MBBR-MBR 13X-H and in the control MBBR-MBR total fouling took place at about 32d. This is attributed to the large production of soluble microbial products (SMP) in the MBBR-MBR 13X-H, which resulted from a large amount of biofilm created in the 13X-H biocarriers. An optimal biodegradation of the organic load was concluded, and nitrification and denitrification processes were improved at the MBBR-MBR K1 and MBBR-MBR 13X-H units. The dry mass produced on the 13X-H biocarriers ranged at 4980-5711 mg, three orders of magnitude larger than that produced on the K1, which ranged at 2.9-4.6 mg. Finally, it was observed that mostly extracellular polymeric substances were produced in the biofilm of K1 biocarriers while in 13X-H mostly SMP.
Collapse
Affiliation(s)
- Dimitra C. Banti
- QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece; (E.K.); (V.T.); (T.S.)
- Department of Food Science and Technology, School of Geotechnical Sciences, International Hellenic University, 57400 Thessaloniki, Greece;
| | - Petros Samaras
- Department of Food Science and Technology, School of Geotechnical Sciences, International Hellenic University, 57400 Thessaloniki, Greece;
| | - Eleni Kostopoulou
- QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece; (E.K.); (V.T.); (T.S.)
| | - Vassiliki Tsioni
- QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece; (E.K.); (V.T.); (T.S.)
| | - Themistoklis Sfetsas
- QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece; (E.K.); (V.T.); (T.S.)
| |
Collapse
|
|
2
|
Zhu J, You H, Ng HY, Li Z, Xie B, Chen H, Ding Y, Tan H, Liu F, Zhang C. Impacts of bio-carriers on the characteristics of cake layer and membrane fouling in a novel hybrid membrane bioreactor for treating mariculture wastewater. CHEMOSPHERE 2022; 300:134593. [PMID: 35427670 DOI: 10.1016/j.chemosphere.2022.134593] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/25/2022] [Accepted: 04/09/2022] [Indexed: 06/14/2023]
Abstract
Membrane fouling is generally considered as a major bottleneck to the wide application of membrane bioreactor (MBR) for high saline mariculture wastewater treatment. Though numerous researches have investigated the membrane fouling of MBR combined with bio-carriers, few studies reveal the impacts of bio-carriers on the characteristics of cake layer and the mechanism of bio-carriers alleviating membrane fouling. In this study, two systems, namely carriers-enhanced MBR (R1) and conventional MBR (R2) were parallel operated, drawing a conclusion that bio-carriers effectively improved the characteristics of cake layer, thus mitigating membrane fouling. Fluorescence excitation emission matrix (EEM) analysis indicated that bio-carriers reduced the adhesion of proteins and humic acid-like materials on membrane surface. Molecular weight (Mw) distribution suggested that soluble microbial products (SMP) with small Mw (6-20 kDa) and biopolymers in extracellular polymeric substances (EPS) (50-300 kDa) was easier to accumulate on membrane surface in R2. The above results indicated that the presence of bio-carriers could effectively reduce the attachment of these organics on membrane surface, contributing to a larger porosity of cake layer and thus mitigating membrane fouling. Meanwhile, gas chromatography-mass spectrometry (GC-MS) clarified that more components were present in R2 than R1. Moreover, the majority of compounds in the SMP were present in both systems, while only 14 compounds in the EPS were the same between R1 and R2. Noticeably, certain aromatics only existed in R2, suggesting that bio-carriers effectively reduced the accumulation of recalcitrant materials, especially aromatics. These results revealed that bio-carriers shifted the precise composition of cake layers.
Collapse
Affiliation(s)
- Jing Zhu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Hong You
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China
| | - How Yong Ng
- Environmental Research Institute, National University of Singapore, 117411, Singapore
| | - Zhipeng Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China.
| | - Binghan Xie
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China
| | - Hongying Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Yi Ding
- Marine College, Shandong University at Weihai, Weihai, 264209, China
| | - Haili Tan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China
| | - Feng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China
| | - Chunpeng Zhang
- Key Laboratory of Groundwater Resources and Environment (Ministry of Education), Jilin University, Changchun, 130021, China
| |
Collapse
|
|
4
|
Jin X, Liu X. Membrane-Based Technologies for Water and Energy Sustainability. MEMBRANES 2021; 11:membranes11110807. [PMID: 34832036 PMCID: PMC8617823 DOI: 10.3390/membranes11110807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 10/22/2021] [Indexed: 11/16/2022]
Abstract
In finalizing this Special Issue, "Membrane-based Technologies for Water and Energy Sustainability", we would like to express our sincere appreciation to the authors, reviewers, and publisher for their outstanding work [...].
Collapse
Affiliation(s)
- Xue Jin
- School of Chemical, Biological and Environmnetnal Engineering, Oregon State University, Corvallis, OR 97331, USA
- Correspondence: ; Tel.: +1-541-737-7968
| | - Xin Liu
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
| |
Collapse
|
|
5
|
Abstract
Biological wastewater treatment processes such as activated sludge and anaerobic digestion remain the most favorable when compared to processes such as chemical precipitation and ion exchange due to their cost-effectiveness, eco-friendliness, ease of operation, and low maintenance. Since Abattoir Wastewater (AWW) is characterized as having high organic content, anaerobic digestion is slow and inadequate for complete removal of all nutrients and organic matter when required to produce a high-quality effluent that satisfies discharge standards. Multi-integrated systems can be designed in which additional stages are added before the anaerobic digester (pre-treatment), as well as after the digester (post-treatment) for nutrient recovery and pathogen removal. This can aid the water treatment plant effluent to meet the discharge regulations imposed by the legislator and allow the possibility for reuse on-site. This review aims to provide information on the principles of anaerobic digestion, aeration pre-treatment technology using enzymes and a hybrid membrane bioreactor, describing their various roles in AWW treatment. Simultaneous nitrification and denitrification are essential to add after anaerobic digestion for nutrient recovery utilizing a single step process. Nutrient recovery has become more favorable than nutrient removal in wastewater treatment because it consumes less energy, making the process cost-effective. In addition, recovered nutrients can be used to make nutrient-based fertilizers, reducing the effects of eutrophication and land degradation. The downflow expanded granular bed reactor is also compared to other high-rate anaerobic reactors, such as the up-flow anaerobic sludge blanket (UASB) and the expanded granular sludge bed reactor (EGSB).
Collapse
|