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Monitoring Efficacy of Constructed Wetland for Treating Domestic Effluent-Microbiological Approach


Affiliations
1 ICRISAT Development Center, International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, India
 

Water scarcity and elevated potential in wastewater treatment in the last decades raise attention towards constructed wetlands (CWs). The present study was carried out to evaluate the efficacy of CW for faecal coliform (FC) expulsion and to isolate and characterize the microbial communities. Significant differences were observed between influent and effluent microbial counts of vegetated and control cells (without vegetation) of wetland. FC reduction ranged from 64% to 81%; however, total bacterial, fungal and actinomycetes average poll ranged from 66.67 × 105 cfu/g to 142.67 × 105 cfu/g, 1.67 × 102 cfu/g to 10.33 × 102 cfu/g and 16.00 × 103 cfu/g to 53.33 × 103 cfu/g respectively, isolated from vegetated and control cells. Results further indicated that bacteria were most abundant, followed by actinomycetes, whereas the number of fungi was least among three groups of microbes, which could be attributed to wide tolerance to the properties of CW. Removal of FC was less apparent initially compared to the later stages of operation, which is of concern for long-term efficiency and stability of wetland. Also, diversity of identified bacterial strains is beneficial for growth and yield enhancement of agriculture crops. The results also demonstrate that CWs are the key habitats for bioactive actinomycetes with paramount medical, scientific and economic potential significance globally in general and developing countries like India in particular. Overall, backwash imparts the baseline compilation of CWs for its management for sustainable agriculture.

Keywords

Actinomycetes, Bacteria, Constructed Wetland, Faecal Coliform, MPN.
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  • Monitoring Efficacy of Constructed Wetland for Treating Domestic Effluent-Microbiological Approach

Abstract Views: 383  |  PDF Views: 159

Authors

M. Kaushal
ICRISAT Development Center, International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, India
S. P. Wani
ICRISAT Development Center, International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, India
M. D. Patil
ICRISAT Development Center, International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, India
A. Datta
ICRISAT Development Center, International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, India

Abstract


Water scarcity and elevated potential in wastewater treatment in the last decades raise attention towards constructed wetlands (CWs). The present study was carried out to evaluate the efficacy of CW for faecal coliform (FC) expulsion and to isolate and characterize the microbial communities. Significant differences were observed between influent and effluent microbial counts of vegetated and control cells (without vegetation) of wetland. FC reduction ranged from 64% to 81%; however, total bacterial, fungal and actinomycetes average poll ranged from 66.67 × 105 cfu/g to 142.67 × 105 cfu/g, 1.67 × 102 cfu/g to 10.33 × 102 cfu/g and 16.00 × 103 cfu/g to 53.33 × 103 cfu/g respectively, isolated from vegetated and control cells. Results further indicated that bacteria were most abundant, followed by actinomycetes, whereas the number of fungi was least among three groups of microbes, which could be attributed to wide tolerance to the properties of CW. Removal of FC was less apparent initially compared to the later stages of operation, which is of concern for long-term efficiency and stability of wetland. Also, diversity of identified bacterial strains is beneficial for growth and yield enhancement of agriculture crops. The results also demonstrate that CWs are the key habitats for bioactive actinomycetes with paramount medical, scientific and economic potential significance globally in general and developing countries like India in particular. Overall, backwash imparts the baseline compilation of CWs for its management for sustainable agriculture.

Keywords


Actinomycetes, Bacteria, Constructed Wetland, Faecal Coliform, MPN.

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DOI: https://doi.org/10.18520/cs%2Fv110%2Fi9%2F1710-1715