Research on enhancing the mechanical strength of polyvinyl alcohol/sodium alginate gel beads applied in biological wastewater treatment
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https://doi.org/10.54939/1859-1043.j.mst.78.2022.93-100Keywords:
Graphene oxide; Polyvinyl alcohol-sodium alginate; Immobilization; Activated sludge; Carrier.Abstract
This study investigated a new type of polyvinyl alcohol-sodium alginate (PVA/SA) gel beads for immobilization of activated sludge biomass. Gel beads are made from PVA, SA, and graphene oxide (GO) with different concentrations of GO (0.02, 0.2; 2; 20 and 200 mg/L). The results showed that the basic properties, including the roundness and expansion rate of the gel beads, did not differ significantly between the GO concentrations. At the same time, the higher the concentration of go, the more it improves the mechanical strength of the gel beads. The highest strength was when GO levels reached 200 mg/L. At the same concentration, the gel beads achieved the highest methylene blue absorption capacity (91.2%) and the fastest oxygen consumption rate (0.31 mg/L/min) compared to PVA/SA gel beads without GO. This result initially demonstrated that the addition of GO is an effective way to enhance the mechanical strength of PVA/SA gel beads.
References
[1]. G. Mitropoulou, V. Nedovic, A. Goyal, và Y. Kourkoutas. Immobilization technologies in probiotic food production. J Nutr Metab., số 2013 (2013), tr 1-14.
[2]. A. Basso và S. Serban. Industrial applications of immobilized enzymes - A review. Mol. Catal., số 479 (2019), tr 110607-110626.
[3]. X. Zhang, S. You, L. Ma, C. Chen, và C. Li. The application of immobilized microorganism technology in wastewater treatment. 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology (2015). Atlantis Press.
[4]. F. Zhong, S. Li, và K. Yuan. Immobilization of Dominant Bacteria by Polyvinyl Alcohol và Its Effect on COD Removal from Coking Wastewater. in IOP Conference Series: Materials Science and Engineering (2019). IOP Publishing.
[5]. Y. Lu, L. Ma, Y. Liang, B. Shan, và J. Chang. Enhancing nitrogen removal performance in a bioreactor using immobilized anaerobic ammonium oxidation sludge by polyvinyl alcohol-sodium alginate (PVA-SA). Pol. J. Environ. Stud., số 27 (2018), tr 773-778.
[6]. T. Takei, K. Ikeda, H. Ijima, và K. Kawakami, Fabrication of poly (vinyl alcohol) hydrogel beads crosslinked using sodium sulfate for microorganism immobilization. Process Biochem., số 46(2) (2011), 566-571.
[7]. N.T. Minh, M. Choi, N. Park, H. Bae, N.T. Minh, M. Choi, N. Park, và H. Bae. Critical design factors for polyvinyl alcohol hydrogel entrapping ammonia-oxidizing bacteria: biomass loading, distribution of dissolved oxygen, và bacterial liability. Environ. Eng. Res., số 26 (2020), tr 1-7
[8]. Y. Wang, Y. Liu, M. Feng, và L. Wang. Study of the treatment of domestic sewage using PVA gel beads as a biomass carrier. J. Water Reuse Desalin., số 8 (2018), tr 340-349.
[9]. M.P. Shah, S. Rodriguez-Couto, và S.S. Sengor, Emerging Technologies in Environmental Bioremediation. Elsevier, 2020.
[10]. T. Cheng-an, Z. Hao, W. Fang, Z. Hui, Z. Xiaorong, và W. Jianfang. Mechanical properties of Graphenee oxide/polyvinyl alcohol composite film. Polym. Polym. Compos., số 25 (2017), tr 11-16.
[11]. M. Aslam, M.A. Kalyar, và Z.A. Raza, Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites. Polym. Eng. Sci., số 58 (2018), tr 2119-2132.
[12]. X. Wu, Y. Xie, C. Xue, K. Chen, X. Yang, L. Xu, J. Qi, và D. Zhang. Preparation of PVA-GO composite hydrogel and effect of ionic coordination on its properties. Mater. Res. Express., số 6 (2019), 075306.
[13]. Y. Sha, J. Liu, J. Yu, S. Xu, W. Yan, Z. Li, và M. Shahbaz. Effect of Graphene oxide on the ammonia removal and bacterial community in a simulated wastewater treatment process. J Environ Eng, số 146 (2020), 04020097.
[14]. N. Tuyen, J. Ryu, J. Yae, H. Kim, S. Hong, và D. Ahn. Nitrogen removal performance of anammox process with PVA–SA gel bead crosslinked with sodium sulfate as a biomass carrier. J. Ind. Eng. Chem, số 67 (2018), tr 326-332.
[15]. J.-W. Woo, H.-J. Rob, H.-D. Park, C.-I. Ji, Y.-B. Lee, và S.-B. Kim. Sphericity optimization of calcium alginate gel beads and the effects of processing conditions on their physical properties. Food Sci. Biotechnol., số 16 (2007), tr 715-721.
[16]. B.-B. Lee, R. Ibrahim, S.-Y. Chu, N.A. Zulkifli, và P. Ravindra. Alginate liquid core capsule formation using the simple extrusion dripping method. J. Polym. Eng., số 35 (2015), tr 311-318.
[17]. Y. Zhang và L. Ye. Improvement of permeability of poly (vinyl alcohol) hydrogel by using poly (ethylene glycol) as porogen. Polym. Plast. Technol. Eng., số 50 (2011), tr 776-782.
[18]. S. Magdum, G. Minde, và V. Kalyanraman. Rapid determination of indirect cod and polyvinyl alcohol from textile desizing wastewater. Pollut. Res., số 32 (2013), tr 515-519.
[19]. W.E. Federation và A. Association standard methods for the examination of water và wastewater. American Public Health Association (APHA): Washington, DC, USA, 2005.
[20]. A. Banach-Wiśniewska, M. Ćwiertniewicz-Wojciechowska, và A. Ziembińska-Buczyńska. Effect of temperature shifts and anammox biomass immobilization on sequencing batch reactor performance and bacterial genes abundance. Int J Sci Environ Technol Title, 2020, tr 1-12.
[21]. L. S. Zhang, W. Z. Wu, và J. l. Wang. Immobilization of activated sludge using improved polyvinyl alcohol (PVA) gel. J. Environ. Sci., số 19 (2007), tr 1293-1297.
[22]. W. P. Voo, C. W. Ooi, A. Islam, B. T. Tey, và E. S. Chan. Calcium alginate hydrogel beads with high stiffness and extended dissolution behaviour. Eur. Polym. J., số 75 (2016), tr 343-353.
[23]. T. Takei, K. Ikeda, H. Ijima, M. Yoshida, và K. Kawakami, A comparison of sodium sulfate, sodium phosphate, and boric acid for preparation of immobilized Pseudomonas putida F1 in poly (vinyl alcohol) beads. Polym. Bull., số 69 (2012), tr 363-373.
[24]. L. Zhang, Z. Wang, C. Xu, Y. Li, J. Gao, W. Wang, và Y. Liu, High strength Graphenee oxide/polyvinyl alcohol composite hydrogels. J. Mater. Chem., số 21 (2011), tr 10399-10406.
[25]. A. Banach-Wiśniewska, M. Tomaszewski, M.S. Hellal, và A. Ziembińska-Buczyńska. Effect of biomass immobilization and reduced Graphenee oxide on the microbial community changes and nitrogen removal at low temperatures. Sci. Rep., số 11 (2021), tr 1-12.
[26]. S. Morimune, T. Nishino, và T. Goto, Poly (vinyl alcohol)/Graphenee oxide nanocomposites prepared by a simple eco-process. Polym. J., số 44 (2012), 1056-1063.
