Leachate treatment: comparison of a bio-coagulant (Opuntia ficus mucilage) and conventional coagulants using multi-criteria decision analysis

Heliyon

Juan A. Araiza-Aguilar¹  María Neftalí Rojas Valencia²  Alfredo Martínez-Cruz²  Hugo A. Nájera-Aguilar³  Rubén F. Gutiérrez-Hernández³ 

[1] Corresponding author.;National Autonomous University of Mexico, Institute of Engineering, External Circuit, University City, Mayoralty Coyoacan, Mexico City, Mexico;University of Science and Arts of Chiapas, School of Environmental Engineering, North beltway 1150, Lajas Maciel, 29039, Tuxtla Gutierrez, Chiapas, Mexico;

关键词: Bio-coagulants;    Coagulation-flocculation;    Multi-criteria matrix;    Opuntia ficus mucilage;    Stabilized leachate;   

DOI  :  

来源: DOAJ

【 摘 要 】

The main aim of this research was to compare a bio-coagulant, organic coagulant, and a conventional coagulant applied to the treatment of leachates. Coagulant options were Stage 1 FeCl3, Stage 2 Polyamine, and Stage 3 Opuntia ficus mucilage (OFM). Optimal conditions for maximum chemical oxygen demand (COD) removal were determined by experimental data and Response Surface Methodology. The application of Multiple Criteria Decision Analysis using Multi-Criteria Matrix (MCM) was explored by evaluating the Coagulation–Flocculation processes. Maximum COD removal (%) and the best MCM scores (on a scale from 0 to 100) were: Stage 1: 69.2±0.9 and 48.50, Stage 2: 37.8±1.1 and 79.0, and Stage 3: 71.1±1.7, and 81.5. Maximum COD removal using FeCl3 and OFM was not statistically different (p 0.15 < 0.05). OFM extraction process was evaluated (yield 0.70 ± 1.17%, carbohydrate content 32.6 ± 1.18%). MCM allows the evaluation of additional technical aspects, besides oxygen COD removal, as well as economic aspects, permitting a more comprehensive analysis. Significant COD removals indicate that the use of OFM as a coagulant in the treatment of stabilized leachate was effective. Opuntia ficus cladodes, a residue, were used to treat another residue (leachates).

【 授权许可】

Unknown