Residence time distribution experiments in a hybrid anaerobic blanket reactor treating real pharmaceutical wastewater

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-01-01 Epub Date: 2024-02-06 DOI:10.1016/j.jtice.2024.105381

P. Mullai , S. Vishali , K. Dharmalingam

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Abstract

Background

The phenomena of mixing is considered important due to its involvement in modelling and design of reactors.

Methods

The residence time distribution (RTD) experiments to find out the mixing characteristics were conducted in hybrid anaerobic blanket reactor (HABR) with four different OLRs of pharmaceutical wastewater using lithium chloride as tracer by means of stimulus-response technique. The mean hydraulic retention time, dispersion and Peclet number for various OLRs in HABR were determined.

Significant findings

The experimental COD removal efficiencies in HABR and the theoretical performance were found out using the axial dispersion flow model (ADFM) and plug flow model (PFM). The estimated theoretical chemical oxygen demand (COD) removal efficiencies, using the ADFM were 92.4 %, 82.0 %, 63.0 % and 41.7 % and the values respectively for PFM were 97.27 %, 93.92 %, 83.47 % and 59.34 %. The error percentage detected was less than 7 % in ADFM which exhibited better flow representation in HABR. Furthermore, the value of correlation coefficient (R² = 0.9956) between the theoretical COD removal efficiencies and experimental values confirmed the suitability of the ADF model.

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处理实际制药废水的混合厌氧毯式反应器中的停留时间分布实验

混合现象被认为是重要的，因为它涉及到反应器的建模和设计。方法采用刺激响应技术，以氯化锂为示踪剂，在混合厌氧膜式反应器（HABR）中对4种不同olr的制药废水进行停留时间分布（RTD）实验，研究其混合特性。测定了各种olr在HABR中的平均水力滞留时间、分散度和Peclet数。采用轴向分散流模型（ADFM）和塞流模型（PFM）对HABR的COD去除效果进行了实验研究，并对其理论性能进行了比较。ADFM的理论COD去除率分别为92.4%、82.0%、63.0%和41.7%，PFM的去除率分别为97.27%、93.92%、83.47%和59.34%。在ADFM中检测到的错误率小于7%，在HABR中表现出更好的流量表征。此外，理论COD去除率与实验值的相关系数（R2 = 0.9956）证实了ADF模型的适用性。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.