Growth Dynamics and Nutrient Removal from Biogas Slurry Using Water Hyacinth

Apurba Koley, Richik GhoshThakur, Kaushik Das, Nitu Gupta, Aishiki Banerjee, Binoy Kumar Show, Anudeb Ghosh, Shibani Chaudhury, Amit Kumar Hazra, Gaurav Nahar, Andrew B. Ross () and Srinivasan Balachandran ()
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Apurba Koley: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India
Richik GhoshThakur: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India
Kaushik Das: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India
Nitu Gupta: Department of Environmental Science, Tezpur University, Tezpur 784028, India
Aishiki Banerjee: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India
Binoy Kumar Show: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India
Anudeb Ghosh: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India
Shibani Chaudhury: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India
Amit Kumar Hazra: Socio-Energy Laboratory, Department of Lifelong Learning and Extension, Institute of Rural Reconstruction, Visva-Bharati, Sriniketan 731236, India
Gaurav Nahar: Defiant Renewables Pvt Ltd., Bhoir Colony, Chinchwad, Pune 411033, India
Andrew B. Ross: School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
Srinivasan Balachandran: Bioenergy Laboratory, Department of Environmental Studies, Siksha-Bhavana (Institute of Science), Visva-Bharati, Santiniketan 731235, India

Sustainability, 2024, vol. 16, issue 11, 1-17

Abstract: Aquatic macrophytes, notably the invasive water hyacinth, exhibit proficiency in nutrient removal from polluted water bodies, rendering them appealing for water remediation applications. This study investigates the potential of water hyacinth in phytoremediation, focusing on the effect of using nutrient-rich biogas slurry mixed with water in varying concentrations, i.e., 16.6, 33, 66.6, 100, and 133 mg/L for the investigation. The physiochemical properties of the liquid biogas slurry were evaluated before and after treatment with water hyacinth over eight weeks, with continuous monitoring of nutrient reduction rates. Results showcased substantial average reductions of nitrogen, phosphorus, and potassium, with a relative growth rate of 5.55%. The treatment also decreased pH, total dissolved solids, hardness, and chemical oxygen demand. The theoretical BMP of water hyacinth was determined using Buswell’s equation. Water hyacinth grown in the concentration of the biogas slurry exhibited the highest methane yield at 199 mL CH 4 /gm VS, along with the highest relative growth rate. This study used experimental data to create a mathematical model that describes how the relative growth of water hyacinth depends on the number of days and biogas slurry concentration (C). The model’s quality and effectiveness were evaluated using the goodness of fit (R 2 ) and observable approaches. The polynomial model, referred to as Poly model 1, 2, is the best fit for describing the relationship between the growth percentage of water hyacinth, days, and nutrient solution concentration. In this model, C has a polynomial degree of one (normalized mean of 69.84 ± 43.54), while D has a degree of two (normalized mean of 30 ± 21.65).

Keywords: aquatic plants; relative growth rate; nutrient management; biogas byproduct; PCA; modelling (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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