Abstract
AbstractWetlands play a vital role as one of the most important natural habitats on our planet. However, the survival of these natural wetlands is threatened by various factors. The arrival of invasive and non-native aquatic ferns is one of these challenges. In this regard, Azolla filiculoides has become a severe problem for the Anzali wetland. Azolla, as an aquatic fern, has created numerous issues in aquatic habitats and paddy fields in recent decades. However, the valorization of Azolla can contribute to the establishment of a collection system for this invasive fern, which can consequently reduce the negative impact of this fern on the wetland, and it can serve as a free and available source of biomass. In this respect, a fuzzy multi-criteria decision-making approach was used to rank the valorization strategies of this invasive fern. Initially, through an in-depth literature review and expert opinions, four criteria were designated as indicators for research evaluation: 1) technical, 2) economic, 3) social, and 4) environmental. Six management options for Azolla were considered: 1) no collection, 2) collection and landfilling, 3) direct use as livestock and poultry feed, 4) composting, 5) biogas generation, and 6) biodiesel generation. The results revealed that “biodiesel generation,” “biogas generation,” and “composting” were ranked as the most effective management strategies for Azolla in the investigated wetland. This study suggests that bioenergy generation and compost production from Azolla are promising strategies towards mitigating the negative impact of this fern on the Anzali wetland.
Publisher
Cold Spring Harbor Laboratory
Reference32 articles.
1. A review of biofuel production from floating aquatic plants: an emerging source of bio-renewable energy;Biofuels, Bioproducts and Biorefining,2021
2. Azar, A. , Rajabzade, A. (2017). Multi-Attribute Decision Making(MADM). Tehran: Negahe danesh.
3. Bao, J. , Bian, Z. , Yu, Z. , Phanphichit, T. , Wang, G. and Zhou, Y. , 2021, August. A Hybrid Approach to Risk Analysis for Critical Failures of Machinery Spaces on Unmanned Ships by Fuzzy AHP. In International Conference on Neural Computing for Advanced Applications (pp. 273–287). Springer, Singapore.
4. Bastan, M. and Shakouri, H. , 2018. A system dynamics model for policy evaluation of energy dependency. In The 2nd IEOM European International Conference on Industrial Engineering and Operations Management.
5. Lipid yield and composition of Azolla filiculoides and the implications for biodiesel production;BioEnergy Research,2016