| Autor: |
Benlouali H; Department of Horticulture, Hassan II Institute of Agronomy and Veterinary Medicine, Complex of Horticulture, Agadir, Morocco E-mail: h.benlouali@gmail.com., Karmal I; Faculty of Science, Ibn Zohr University, Agadir, Morocco., Cherif Harrouni M; Department of Horticulture, Hassan II Institute of Agronomy and Veterinary Medicine, Complex of Horticulture, Agadir, Morocco E-mail: h.benlouali@gmail.com., Ghanbaja J; Institut Jean Lamour, University of Lorraine/CNRS, Nancy, France., Frascari D; Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy., Hamdani M; Faculty of Science, Ibn Zohr University, Agadir, Morocco., Choukr-Allah R; Department of Horticulture, Hassan II Institute of Agronomy and Veterinary Medicine, Complex of Horticulture, Agadir, Morocco E-mail: h.benlouali@gmail.com. |
| Abstrakt: |
In Agadir, a water-scarce Moroccan region, municipal and industrial wastewater is tertiary-treated to be reused in golf courses. Wastewater reuse has been constrained by severe clogging of emitters, which caused technical and financial problems. This study aimed to perform an in-depth characterization of the treated wastewater (TWW) in relation to its susceptibility to cause clogging, and to assess the capacity of an aeration post-treatment to reduce the clogging potential. The post-treatment consisted of injecting different airflows (0-33 L/(h L reactor ) into the TWW. The structural, morphological and elemental composition of the clogging matter collected in the irrigation pipeline was characterized using scanning electron microscopy, scanning transmission electron microscopy, X-ray diffraction and X-ray energy dispersive spectroscopy. The 15-day aeration post-treatment at 16.5 L/(h L reactor ) presented the best cost-benefit ratio. Organic matter was totally degraded. Calcium was reduced by 9%, bicarbonates by 54%. The analysis of the deposits induced by the aeration post-treatment revealed a relevant decrease of the major constituents of the clogging deposits found in the irrigation pipeline. The results show the effectiveness of post-aeration in biodegrading residual organic matter and precipitating several salts, thus reducing the clogging potential. |
