Hospital wastewater treated with a novel bacterial consortium (Alcaligenes faecalis and Bacillus paramycoides spp.) for phytotoxicity reduction in Berseem clover and Tomato crops

Rashid, A., Mirza, S. A., Keating, C. , Ali, S. and Campos, L. C. (2021) Hospital wastewater treated with a novel bacterial consortium (Alcaligenes faecalis and Bacillus paramycoides spp.) for phytotoxicity reduction in Berseem clover and Tomato crops. Water Science and Technology, 83(7), pp. 1764-1780. (doi: 10.2166/wst.2021.079) (PMID:33843758)

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Abstract

Hospital wastewaters are produced in large volumes in Pakistan (∼362–745 L/bed.day) and are discharged without proper treatment. They are widely used by farmers for crop irrigation and induce a phytotoxic effect on plant growth. The study was conducted to evaluate the effect of untreated and treated hospital wastewater on seed germination of a fodder crop Trifolium alexandrinum (Berseem clover) and a food crop Solanum lycopersicum (tomato). A bacterial consortium was formed with three bacterial strains, i.e., Alcaligenes faecalis and Bacillus paramycoides spp., which were individually proven efficient in previous studies. The concentrations of untreated and treated hospital wastewater (25, 50, 75 and 100%) were used to irrigate these crop seeds. To assess the efficiency of treatment, the germination percentage, delay index, germination index, stress tolerance indices, seedling vigour index and phytotoxicity index were calculated and were statistically proven significant. The seeds grown in treated wastewater concentrations showed negative values of phytotoxicity indices (tomato: −0.36, −0.47, −0.78 and −1.11; Berseem clover: −0.23) which indicate a stimulatory or non-toxic effect on seedling growth. Our work proposes that this bacterial consortium is efficient for hospital wastewater treatment before crop irrigation.

Item Type:Articles
Additional Information:Aneeba Rashid has been supported under the 5000-Indigenous PhD Scholarship funded by Higher Education Commission, Pakistan (PIN: 315-4354-2BS3-051).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Keating, Dr Ciara
Authors: Rashid, A., Mirza, S. A., Keating, C., Ali, S., and Campos, L. C.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Water Science and Technology
Publisher:IWA Publishing
ISSN:0273-1223
ISSN (Online):1996-9732
Published Online:22 February 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Water Science and Technology 83(7): 1764-1780
Publisher Policy:Reproduced under a Creative Commons licence

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