Eco-engineered microbes: Advancing green wastewater management

Abstract

The rapidly increasing population, coupled with industrialization and urbanization, has been the major factor in escalating water contamination worldwide, thus making sustainable wastewater treatment a top priority. This review communicates the intricate relationships of microorganisms, bacteria, algae, fungi, protozoa, and genetically modified strains with bioremediation tactics that detoxify a wide range of pollutants, such as heavy metals, pharmaceuticals, dyes, pesticides, and hydrocarbons. The microbial processes, such as biosorption, enzymatic degradation, bioaccumulation, and biofilm formation, are compatible with the environment and are often preferred to those of the conventional treatment systems, which are generally energy-intensive and chemically reliant. Furthermore, advanced methods such as microbial fuel cells (MFCs), clustered regularly interspaced short palindromic repeats (CRISPR) based genetic modifications, and microbial nanomaterials are capable of upgrading the wastewater remediation in terms of both sustainability and efficiency. Biological systems such as activated sludge, anaerobic digestion, constructed wetlands, and sequencing batch reactors (SBR) are examples of the potential for integrated pollutant removal and resource recovery. The article also surveyed the importance of microbial consortia and engineered strains in the breakdown of complex contaminants and the production of value-added products like bioenergy and bioplastics. By applying circular economy principles, microbial methods not only cleanse wastewater but also contribute significantly to environmental recovery and public health protection. If innovation is sustained and integration is interdisciplinary, microbial systems will be the ones to bring the revolution in wastewater treatment, making it a sustainable, resource-generating process.