A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Use of Alcaligenes faecalis to Reduce Coliforms and Enhance the Stabilization of Faecal Sludge
The disposal of human faecal sludge (FS) is one of the biggest environmental problems. It can be solved by using FS as an agricultural fertilizer. However, this is hampered by the presence of pathogenic microflora and high organic matter content in FS. This paper proposes a novel treatment approach for FS to address these issues. It consists of the preliminary aerobic incubation of FS with the bioaugmentation of bacterial culture Alcaligenes faecalis DOS7. A. faecalis has been shown to inhibit the growth of various microorganisms, including coliforms (Escherichia coli). For the treatment of FS, three tanks with a volume of 1 m3 each, equipped with a mixing and aeration system, were used. A. faecalis culture was introduced into two experimental tanks at a concentration of 106 and 6.5 × 106 cells/mL. The 11-day incubation in the experimental tanks resulted in the decomposition of organic matter in the FS that was several times faster than in the control (p < 0.05). Total suspended solids decreased 2.5–5-fold, chemical oxygen demand decreased 1.8-fold, 5-day biochemical oxygen demand decreased 1.5–2-fold. At the same time, after 4 days of incubation, no coliforms were detected in the experimental tanks, and in the control, coliforms accounted for 13.9% of the total number of cells after 11 days of incubation. The proposed method of FS pretreatment is a real alternative to the existing ones and can be used both individually and in combination with other methods, for example, composting.
Use of Alcaligenes faecalis to Reduce Coliforms and Enhance the Stabilization of Faecal Sludge
The disposal of human faecal sludge (FS) is one of the biggest environmental problems. It can be solved by using FS as an agricultural fertilizer. However, this is hampered by the presence of pathogenic microflora and high organic matter content in FS. This paper proposes a novel treatment approach for FS to address these issues. It consists of the preliminary aerobic incubation of FS with the bioaugmentation of bacterial culture Alcaligenes faecalis DOS7. A. faecalis has been shown to inhibit the growth of various microorganisms, including coliforms (Escherichia coli). For the treatment of FS, three tanks with a volume of 1 m3 each, equipped with a mixing and aeration system, were used. A. faecalis culture was introduced into two experimental tanks at a concentration of 106 and 6.5 × 106 cells/mL. The 11-day incubation in the experimental tanks resulted in the decomposition of organic matter in the FS that was several times faster than in the control (p < 0.05). Total suspended solids decreased 2.5–5-fold, chemical oxygen demand decreased 1.8-fold, 5-day biochemical oxygen demand decreased 1.5–2-fold. At the same time, after 4 days of incubation, no coliforms were detected in the experimental tanks, and in the control, coliforms accounted for 13.9% of the total number of cells after 11 days of incubation. The proposed method of FS pretreatment is a real alternative to the existing ones and can be used both individually and in combination with other methods, for example, composting.
Use of Alcaligenes faecalis to Reduce Coliforms and Enhance the Stabilization of Faecal Sludge
Nataliya Loiko (author) / Oleg Kanunnikov (author) / Yuriy Litti (author)
2023
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Rapid Detection of Faecal Coliforms in Coastal Waters
| British Library Conference Proceedings | 1993
Biodegradation of nicosulfuron by a novel Alcaligenes faecalis strain ZWS11
| Online Contents | 2015
| British Library Conference Proceedings | 2001
The rate of concentration of faecal coliforms in shellfish under different environmental conditions
| Online Contents | 1999
Dry and storm weather transport of coliforms and faecal streptococci in combined sewage
| British Library Conference Proceedings | 1995