This is exactly what we do worldwide since 1977. Since 1980 we also convert organic waste(waters) to biomethane to replace fossil fuels for heat and power generation. More on https://www.modelengineering.eu/circulate .
Yes, microbes (Bacteria, fungi, algae) have a lot of applications in the clean-up/remediation of heavy metals, pesticides, toxins, PAHs, and other substances from wastewater, soil and the environment.
Microbes can be harnessed as climate change solutions in other ways as well. Bruns, the Professor of Soil Microbiology at The Pennsylvania State University, highlighted those microbes that consume greenhouse gases are being investigated as solutions to counter rising emissions. Conversely, microbes can also be used to help mitigate the deleterious effects of climate change. Understanding the role of microbes in climate change is therefore critical to protecting the health of the planet. The most significant effect of the microbes on earth is their ability to recycle the primary elements that make up all living systems, especially carbon, oxygen, and. can convert toxic elements into water, carbon dioxide, and other less toxic compounds, which are further degraded by other microbes in a process referred to as mineralization. Bioremediation can be carried out using bacteria, fungi, algae, etc. Microbes such as bacteria, fungi, and algae play an important role in the bioremediation of xenobiotic compounds like dyes and plastic including pesticides and insecticides like morpholine, methyl parathion, organophosphorus compounds, and benzimidazoles. Microorganisms help in cleaning up the environment. They decompose dead and decaying matter from plants and animals, convert them into simpler substances which are later used up by other plants and animals. Thus, they are used to breakdown harmful substances. Microorganisms play a critical role in nitrogen cycle through various processes such as nitrogen fixation, nitrate reduction, nitrification, denitrification, etc.The microbial processes limit the productivity of an ecosystem because nitrogen availability is a limiting factor for plant biomass production. The microorganisms decompose dead organic waste of plants and animals converting them into simple substances. These substances are again used by other plants and animals. The microorganisms can be used to degrade the harmful and smelly substances and thereby clean up the environment. This is because microorganisms decompose dead organic waste of plants and animals converting them into simple substances. These substances are again used by other plants and animals. Thus, microorganisms can be used to degrade harmful and odourific substances and clean up the environment. Bacteria, archaea and fungi are typical prime bioremediators. The application of bioremediation as a biotechnological process involving microorganisms for solving and removing dangers of many pollutants through biodegradation from the environment.