Abstract
The aim of this study is to analyze the performances of an integrated homogeneous Sono-Fenton-ultrafiltration process for the removal of 4-chlorophenol from wastewaters both from technical performance (expressed as phenolics concentration and chemical oxygen demand, COD, reduction) and energy consumption point of view, based on simulations using Aspen Plus® software. Based on experimental data (described in Cailean et al. 2014: “Integrated Sono-Fenton Ultrafiltration Process for 4-Chlorophenol Removal from Aqueous Effluents: Assessment of Operational Parameters (Part 1)”) and statistical multi-regression models developed in MATLAB, a simulation model was implemented in Aspen Plus® and developed to calculate mass and energy balances. This model was used to assess the system behavior under various initial settings and process configurations. The effluent type, the presence of additional membrane units (ultrafiltration) and the variation of concentrate recirculation fractions were investigated. The results show that the integrated process registers over 90 % removal efficiency in the permeate of ultrafiltration and reduces between 70 and 90 % of the pollution load in the concentrate, expressed as phenolics concentration, depending on the scenarios analyzed. Recommendations concerning the use of recirculation options and suitable recirculation fractions of the concentrate are indicated, considering the quality of the resulting permeate and concentrate as well as the energy consumption.
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Abbreviations
- 4CP:
-
4-Chlorophenol
- 4CLCAT:
-
4-Chlorocatechol
- Concentrate 1:
-
The concentrate stream resulting from the ultrafiltration unit, placed before the homogeneous Sono-Fenton stage
- Concentrate 2:
-
The concentrate stream resulting from the ultrafiltration unit, placed after the homogeneous Sono-Fenton stage
- Concentrate recycling:
-
The fraction of the final concentrate stream that is recirculated
- Influent:
-
The initial stream that undergoes treatment
- Permeate 1:
-
The permeate stream resulting from the ultrafiltration unit, placed upstream the homogeneous Sono-Fenton stage
- Permeate 2:
-
The permeate stream resulting from the ultrafiltration unit, placed downstream the homogeneous Sono-Fenton stage
- Recycling:
-
The fraction of the final concentrate stream that is recirculated, from which 4-chlrocatechol is partially bypassed
- UF:
-
Ultrafiltration process
- US:
-
Homogeneous Sono-Fenton process
- US effluent:
-
The stream resulting after the homogeneous Sono-Fenton process
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Acknowledgements
This study was supported by the Romanian National Authority for Scientific Research, CNDI– UEFISCDI, Project no. 60/2012 (PNII Parteneriate), “Integrated System for Reducing Environmental and Human-related Impacts and Risks in the Water Use Cycle” (WATUSER) and BRAIN project “Doctoral scholarships as an investment in intelligence” (ID-6681), financed by the European Social Fund and the Romanian Government.
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Cailean, D., Wukovits, W., Teodosiu, C. et al. Integrated Sono-Fenton ultrafiltration process for 4-chlorophenol removal from aqueous effluents: process modeling and simulation Part 2. Clean Techn Environ Policy 16, 1161–1177 (2014). https://doi.org/10.1007/s10098-014-0716-9
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DOI: https://doi.org/10.1007/s10098-014-0716-9