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Experimental assessment of recycled diesel spill-contaminated domestic wastewater treated by reed beds for irrigation of sweet peppers

Almuktar, S and Scholz, M 2016, 'Experimental assessment of recycled diesel spill-contaminated domestic wastewater treated by reed beds for irrigation of sweet peppers' , International Journal of Environmental Research and Public Health, 13 (2) , p. 208.

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Abstract

The aim of this experimental study is to assess if urban wastewater treated by ten different greenhouse-based sustainable wetland systems can be recycled to irrigate Capsicum annuum L. (Sweet Pepper; California Wonder) commercially grown either in compost or sand within a laboratory environment. The design variables were aggregate diameter, contact time, resting time and chemical oxygen demand. The key objectives were to assess: (i) the suitability of different treated (recycled) wastewaters for irrigation; (ii) response of peppers in terms of growth when using recycled wastewater subject to different growth media and hydrocarbon contamination; and (iii) the economic viability of different experimental set-ups in terms of marketable yield. Ortho-phosphate-phosphorus, ammonia-nitrogen, potassium and manganese concentrations in the irrigation water considerably exceeded the corresponding water quality thresholds. A high yield in terms of economic return (marketable yield expressed in monetary value) was linked to raw wastewater and an organic growth medium, while the plants grown in organic medium and wetlands of large aggregate size, high contact and resting times, diesel-spill contamination and low inflow loading rate produced the best fruits in terms of their dimensions and fresh weights, indicating the role of diesel in reducing too high nitrogen concentrations.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: International Journal of Environmental Research and Public Health
Publisher: MDPI AG
ISSN: 1660-4601
Related URLs:
Funders: Iraqi Government
Depositing User: M Scholz
Date Deposited: 15 Jul 2016 09:12
Last Modified: 15 Jul 2016 09:12
URI: http://usir.salford.ac.uk/id/eprint/39390

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