Erzurum Provincial Directorate of Environment, Urbanization, and Climate Change, Erzurum, 25100, Turkiye.
Department of Environmental Engineering, Atatürk University, Erzurum, 25240, Turkiye.
J Environ Manage. 2024 Nov;370:122355. doi: 10.1016/j.jenvman.2024.122355. Epub 2024 Sep 10.
Vinyl acetate is a volatile organic compound widely used in the chemical industry, and there is a need for effective and economic removal of this volatile organic compound from wastewater and waste gases in chemical industries. This study aims to determine the biological treatability of vinyl acetate both under aerobic and anoxic conditions using mixed cultures obtained from a wastewater treatment plant. Considering the previous studies in the literature, testing the biodegradability of vinyl acetate under both aerobic and anoxic conditions, together with evaluating the effect of other mechanisms, such as adsorption and volatilization, on the removal of vinyl acetate, can be regarded as the prominent part of this study. Wastewater containing artificially prepared vinyl acetate was treated in a batch bioreactor, and performance and kinetic constants were investigated. Aerobic treatment under batch conditions conformed to the Haldane biokinetic equation, and the biokinetic constants of μ, K, and K were calculated as 0.66 h, 19.67 mg L and 50.56 mg L, respectively. Anoxic treatment under batch conditions conformed to the Monod biokinetic equation, and the biokinetic constants of μ and K were calculated as 0.31 h and 33.88 mg L, respectively. Experiments revealed that vinyl acetate was not volatile, and its adsorption and biological treatment performances were 28% and 72%, respectively. The mixed culture had a very high performance for removing vinyl acetate under batch operating conditions. The primary mechanism of vinyl acetate removal was found to be biological treatment.
醋酸乙烯酯是一种挥发性有机化合物，广泛应用于化学工业中，因此需要从化学工业的废水中和废气中有效且经济地去除这种挥发性有机化合物。本研究旨在利用从废水处理厂获得的混合培养物确定醋酸乙烯酯在好氧和缺氧条件下的生物可处理性。考虑到文献中的先前研究，在好氧和缺氧条件下测试醋酸乙烯酯的生物降解性，以及评估其他机制（如吸附和挥发）对醋酸乙烯酯去除的影响，可以被视为这项研究的突出部分。在分批生物反应器中处理含有人工制备的醋酸乙烯酯的废水，并研究其性能和动力学常数。在分批条件下的好氧处理符合 Haldane 生物动力学方程，μ、K 和 K 的生物动力学常数分别计算为 0.66 h、19.67 mg/L 和 50.56 mg/L。在分批条件下的缺氧处理符合 Monod 生物动力学方程，μ 和 K 的生物动力学常数分别计算为 0.31 h 和 33.88 mg/L。实验表明醋酸乙烯酯不易挥发，其吸附和生物处理性能分别为 28%和 72%。混合培养物在分批操作条件下对去除醋酸乙烯酯具有很高的性能。去除醋酸乙烯酯的主要机制被发现是生物处理。
