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Antibacterial Efficacy of Moringa oleifera Seeds for Water Purification

Kacem Nadia Sandra, Derdour Rahma, Djekoun Abdelhamid

Journal of Ecological Engineering

2024

Vol. 25, nr 11

134--142

This study investigated the antibacterial efficacy of Moringa oleifera (M.oleifera) seeds as a natural coagulant for water purification, addressing the critical need for clean water due to its significant impact on human health and disease prevalence linked to contaminated water. The research was carried out to observe the effect of M. oleifera on the microbial load of Raw Water (RW) and treated water (TW) sourced from the Ibn Ziad wastewater treatment facility in Constantine. Results of bacteriological analyses show that the raw water is heavily polluted with high levels of the targeted bacteria: 4.4 × 109 CFU/ml in total germs, 2.4 × 104 CFU/100 ml in total coliforms and total streptococci, and 1.1 × 104 CFU/100ml in fecal coliforms, Escherichia coli, and fecal streptococci, with no decrease observed for sulfite-reducing clostridia. However, the water treated with M. oleifera, at a dose of 20 g·L-1, demonstrates a significant reduction of 99% in total germs, 96% in total coliforms, and 98% in fecal coliforms, with a complete absence of Escherichia coli, streptococci, as well as a complete elimination of total sulfite-reducing clostridia, which falls with the standard guidelines for using this water in irrigation. The obtained results confirmed that M. oleifera seeds positively impact the reduction of pathogenic microorganisms found in wastewater.

Assessment of the Germination Potential of Moringa oleifera Seeds under Different Treatment Conditions

Kacem Nadia Sandra

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 11

321--325

Seed dormancy is the major concern that prevents or slowed down germination resulting in poor inhibitions and germination potential. In order to improve and promote Moringa oleifera cultivation strategies in Algeria, a country known for its extreme climatic conditions, the objective of this study was to evaluate the effectiveness of different pretreatment approaches to increase the seed germination percentage in a reduced time. a plant recognized for its nutritional and therapeutic benefits. Treatments included soaking in cold water for three different durations: 24, 48 and 72 hours, as well as scarification. Germinated seeds, identified by the appearance of their stems above the soil, were counted daily for 15 days at intervals of 5, 8, 10, 12, and 15 days. The result is expressed in terms of the seeds’ germination rate (G%) and the speed at which the germination process is completed (time of germination). Results showed that the germination rate of M. oleifera seeds was 96.66% after 15 DAS (days after sowing), demonstrating that scarification is a successful treatment for maximizing germination potential. Seeds soaked for 72 hours showed a germination rate comparable to that of scarified seeds, reaching 83.33% by 15 days after sowing. This soaking time proved to be almost as effective as scarification. Shorter soaking times of 48 and 24 hours resulted in lower rates of 70% and 63.3%, respectively, indicating that while brief immersion in cold water stimulates germination, it remains less effective than longer soaking times. Control seeds, which received no pre-treatment, exhibited the lowest germination rate throughout the study period, culminating in a rate of 53.33% by the fifteenth DAS. These findings highlight the crucial role of pre-treatments in overcoming seed dormancy and promoting timely germination.