Comparing the performance of UV/Acetylacetone and UV/O3 processes for treatment of olive mill wastewater

IF 1.3 Q4 ENVIRONMENTAL SCIENCES
Roya Radmehr, M. Rafiee, A. Yazdanbakhsh
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引用次数: 2

Abstract

Background: Olive mill wastewater (OMW) is characterized by its high organic content and refractory compounds. The aim of this study was to evaluate and compare the efficiency of UV/O3 and UV/ acetylacetone (UV/AcAc) processes for treatment of pretreated OMW by coagulation/microfiltration (C&M) process. Methods: In this study, a laboratory-scale UV plug flow reactor with ancillary equipment was fabricated. The experimental factors including initial pH (5-9), O3 dosages (1.5-4.5 g/h), and AcAc concentrations (0.01-0.03 M) were measured. For both processes, a reaction time of 120 min was considered. The effect of these variables on removal of wastewater contaminants including BOD, COD, TSS, turbidity, phenol, oil, and grease were investigated. Results: Results showed that raw OMW has a high load of pollutants and very low biodegradability (BOD5 /COD=0.12). In UV/O3 process, the optimal conditions were obtained at pH 8 and ozone injection at 4 g/h. The combined C&M-UV/O3 process removed 78.75% COD, 46.66% BOD5 , 90.88% total phenol, 91.78% TSS, 99.14% oil and grease, and 98.38% turbidity, with promotion of BOD5 / COD from 0.12 to 0.33. In UV/AcAc process, the optimal conditions were achieved at pH 5 and AcAc concentration of 0.03 M. The combined C&M-UV/AcAc process removed 58.75% COD, 67.58% BOD5 , 38.03% total phenol, 83.50% TSS, 93.65% oil and grease, and 95.00% turbidity, with promotion of BOD5 / COD from 0.12 to 0.22. Conclusion: The results showed that the UV/O3 process is completely superior to the UV/AcAc process for removal of OMW contaminants, as well as promoting the biodegradability of OMW.
比较了UV/乙酰丙酮和UV/O3工艺处理橄榄厂废水的性能
背景:橄榄厂废水具有有机物含量高、难降解等特点。本研究的目的是评估和比较UV/O3和UV/AcAc工艺在混凝/微滤(C&M)工艺处理预处理OMW中的效率。方法:在本研究中,制作了一个实验室规模的紫外线塞流反应器及其附属设备。测量了实验因素,包括初始pH(5-9)、O3剂量(1.5-4.5g/h)和AcAc浓度(0.01-0.03M)。对于这两种工艺,都考虑了120分钟的反应时间。研究了这些变量对去除废水污染物(包括BOD、COD、TSS、浊度、苯酚、油和油脂)的影响。结果:OMW具有较高的污染物负荷和极低的生物降解性(BOD5/COD=0.12)。在UV/O3工艺中,最佳工艺条件为pH8,臭氧注入量为4g/h。C&M-UV/O3联合工艺去除了78.75%的COD、46.66%的BOD5、90.88%的总酚、91.78%的TSS、99.14%的油脂和98.38%的浊度,使BOD5/COD从0.12提高到0.33。在UV/AcAc工艺中,最佳工艺条件为pH 5,AcAc浓度为0.03M。C&M-UV/AcA组合工艺去除了58.75%的COD、67.58%的BOD5、38.03%的总酚、83.50%的TSS、93.65%的油脂和95.00%的浊度,BOD5/COD从0.12提高到0.22。结论:在去除OMW污染物方面,UV/O3工艺完全优于UV/AcAc工艺,同时提高了OMW的生物降解性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.40
自引率
37.50%
发文量
17
审稿时长
12 weeks
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