处理复杂有毒工业废水的两级厌氧 EGSB 反应器系统的长期性能和活性研究。

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Water Environment Research Pub Date : 2024-09-01 DOI:10.1002/wer.11109
Ruben Garcia-Tirado, Emma Fernandez-Crespo, Xavier Font, Teresa Vicent, Juan Peralta, Delia Trifi, Raul Martinez-Cuenca, Sergio Chiva
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引用次数: 0

摘要

利用上流式厌氧反应器对工业废水进行厌氧处理因其高效率和产生沼气的潜力而成为一种发展趋势,但由于废水的复杂性和毒性,其在某些行业的应用受到了限制。在本研究中,研究人员对两级膨胀颗粒污泥床(EGSB)反应器系统进行了台架和中试规模的研究,以处理石化工业中复杂且有毒的实际废水。研究了不同运行参数(包括有机负荷率 (OLR)、水力停留时间 (HRT) 和进水特性)对 COD 去除率、沼气产量和成分的影响。此外,还对长期运行后的生物质特定产甲烷活性(SMA)和废水毒性进行了评估。确定了 24 小时的最佳总 HRT,在中试规模下,COD 和 SO4 2- 的总去除率分别为 56.30 ± 5.25% 和 31.68 ± 14.71%,平均沼气产量为 93.47 ± 34.92 NL/天,CH4 含量为 67.01 ± 10.23 %,H2S 为 5210.11 ± 6802.27 ppmv。SMA 和毒性测试证实了废水对厌氧生物质的抑制和毒性作用,在未适应的厌氧接种物中,平均最大抑制率为 65.34%,而在运行 600 天后,慢性毒性导致 SMA 下降了一个数量级。这项研究证明了在 0.97-1.74 克 COD/L/ 天的 OLR 范围内使用 EGSB 反应器对该废水进行厌氧处理的可行性。不过,由于废水对厌氧生物质具有慢性毒性,因此长期运行时需要定期重新接种。实践点:两级 EGSB 反应器系统已在工作台和中试规模上运行,用于处理复杂的有毒石化废水。最佳总 HRT 为 24 小时,平均 COD 去除率为 40% 至 60%。为研究长期适应性,进行了 SMA 和毒性测试,发现活性降低了一个数量级。
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Long-term performance and activity study of a two-stage anaerobic EGSB reactors system treating complex and toxic industrial wastewater.

Anaerobic treatment of industrial wastewater using upflow anaerobic reactors is an extended trend due to its high efficiency and biogas production potential, but its implementation in some sectors is limited due to the complexity and toxicity of the wastewaters. In this study, a two-stage expanded granular sludge bed (EGSB) reactors system has been investigated at both bench and pilot scale for the treatment of complex and toxic real wastewater from a petrochemical industry. The effect of different operational parameters including organic loading rate (OLR), hydraulic retention time (HRT) and influent characteristics over COD removal and biogas production and composition have been studied. Additionally, biomass specific methanogenic activity (SMA) and wastewater toxicity have been evaluated after long-term operation. Optimum total HRT of 24 h has been determined resulting in total COD and SO4 2- removal of 56.30 ± 5.25% and 31.68 ± 14.71%, respectively, at pilot scale, and average biogas production of 93.47 ± 34.92 NL/day with 67.01 ± 10.23 %CH4 content and 5210.11 ± 6802.27 ppmv of H2S. SMA and toxicity tests have confirmed inhibitory and toxic effects of wastewater over anaerobic biomass with average maximum inhibition of 65.34% in the unacclimated anaerobic inoculum while chronic toxicity produced a decrease of an order of magnitude in SMA after 600 days of operation. This study demonstrates the feasibility of applying an anaerobic treatment to this wastewater using EGSB reactors between a 0.97-1.74 gCOD/L/day OLR range. Nonetheless, periodic reinoculation would be necessary for long-term operation due to chronic toxicity of the wastewater exerted on the anaerobic biomass. PRACTITIONER POINTS: A two-stage EGSB reactors system has been operated at bench and pilot scale to treat complex and toxic petrochemical wastewater. Optimal total HRT of 24 h resulted in average COD removal ranging from 40% to 60%. SMA and toxicity tests have been performed to study long-term acclimation, detecting an activity depletion of an order of magnitude.

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来源期刊
Water Environment Research
Water Environment Research 环境科学-工程:环境
CiteScore
6.30
自引率
0.00%
发文量
138
审稿时长
11 months
期刊介绍: Published since 1928, Water Environment Research (WER) is an international multidisciplinary water resource management journal for the dissemination of fundamental and applied research in all scientific and technical areas related to water quality and resource recovery. WER''s goal is to foster communication and interdisciplinary research between water sciences and related fields such as environmental toxicology, agriculture, public and occupational health, microbiology, and ecology. In addition to original research articles, short communications, case studies, reviews, and perspectives are encouraged.
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