A method for increasing the fertility of soil for agricultural crop production by producing a biofertilizer containing one or more selected strains of nitrogen fixing cyanobacteria that are compatible with the type of soil and environmental conditions where the biofertilizer is to be applied and rhizobacteria, and applying the biofertilizer to such soil at a rate that is sufficient to accelerate the fertilization performance of the soil for the growth of agricultural products, and to increase the net terrestrial sequestration of CO2.

The Biopowerplant is a system that integrates the generation of carbon-neutral energy through the cultivation and conversion of microalgal biomass, with sewage sanitation and environmental carbon recovery, with the additional and secondary production of biofertilizer, biofuel, water for reuse. This system integrates a suboptimal anaerobic digestion subsystem focused on the generation of biogas, the processing of the resulting digestate through a microalgal consortium culture subsystem with biofilm induction and smooth decreasing gradient of light radiation, and the transformation of the generated microalgal biomass into syngas through a subsystem of evaporation, torrefaction, pyrolysis, gasification, and combustion in separate chambers. The syngas and methane from the biogas are subsequently used as fuel in an electric power generator capable of operating with mixed gases. The biogas generation process is enriched through the recirculation of the microalgal biomass supernatant, the residual heat from the syngas generation subsystem, and the heat transferred from the combustion gases of the electric generator. The residual sludge from the biogas generation subsystem is recirculated towards a longitudinal biopile subsystem, where it acts as an anaerobic medium compared to the aerobic medium that constitutes the concentrated microalgal biomass, and both streams are mixed to be transformed into the syngas generation subsystem. Input inflows for system operation are mainly sewage, and optionally seawater and/or leachate. The inflows must be bioaugmented with a microalgal consortium dosed automatically by a Compact in situ bioaugmentation system, preferably more than 3 kilometers before the inflow enters the system.

Lake Kivu contains ˜50 million tonnes (MT) dissolved biomethane. Efficient use is problematic from massive associated CO.sub.2: ˜600 MT. Conventional extraction scrubs CO.sub.2 with ˜50% overall CH.sub.4 loss, and returns ˜80% CO.sub.2 into the deep lake, preserving a catastrophe hazard threatening >2 M people. Methods and systems are disclosed coupling: (1) efficient CH.sub.4+CO.sub.2 degassing; (2) optional oxyfuel power generation and CO.sub.2 power cycle technologies; and (3) CO.sub.2 capture, processing, storage and use in a utilization hub. The invention optimally allows power production with >2× improved efficiency plus cryo-energy storage and large-scale greentech industrialization. CO.sub.2-utilizing products can include: Mg-cements/building materials, algal products/biofuels, urea, bioplastics and recycled materials, plus CO.sub.2 for greenhouse agriculture, CO.sub.2-EOR/CCS, off-grid cooling, fumigants, solvents, carbonation, packaging, ores-, biomass-, and agro-processing, cold pasteurization, frack and geothermal fluids, and inputs to produce methanol, DME, CO, syngas, formic acid, bicarbonate and other greentech chemicals, fuels, fertilizers and carbon products.

Disclosed is a process and system for generating hydrogen from carbon dioxide. The process and system for generating a hydrogen gas stream from a carbon dioxide gas stream comprises converting a first waste carbon dioxide gas stream to an organic feedstock using an algal source in a photosynthesis step. The organic feedstock is then converted using an organism to the hydrogen gas stream and gaseous by-products in a biodecomposition step. The generated hydrogen gas may then be collected.

Devices, systems and methods for using photosynthetic biomass to purify water, reduce indoor air pollution, remove greenhouse gases including CO.sub.2 from outdoor atmospheric air, and produce biofuel, food products, and fertilizer are provided herein. Also provided herein are systems and methods for enhancing growth of a photosynthetic biomass in a greenhouse.

A novel carbon formation reactor for forming carbon from a carbon-bearing fluidic stream, and method of using the same, is described. The reactor uses a catalyst bearing surface placed within a heated zone in a carbon-bearing fluidic stream to form carbon, which can then be removed from the reactor, with the process repeatable to achieve high extraction efficiencies.

Systems, methods and devices for the production of renewable natural gasses are provided.

Devices, systems and methods for using photosynthetic biomass to purify water, reduce indoor air pollution, remove greenhouse gases including CO.sub.2 from outdoor atmospheric air, and produce biofuel, food products, and fertilizer are provided herein. Also provided herein are systems and methods for enhancing growth of a photosynthetic biomass in a greenhouse.

The present invention is related to an anaerobic photobioreactor and a method for active biomass cultivation, wastewater treatment, nutrients recovery, energy production and high-value products synthesis. Phototrophic bacteria are cultured in the anaerobic photobioreactor lighted with solar or artificial irradiation where certain light wavelengths are selectively discarded with a light selector installed on the top of the photobioreactor. In this light-based process wastewater treatment and resources recovery, like nutrients and high-value bioproducts (fertilizers, polymers and proteins) present in wastewater are performed simultaneously. Cultured biomass is treated by anaerobic digestion for biofuel production, including optative hydrolytic pre-treatment, and/or valuable bioproducts can be obtained in a downstream process.

Devices, systems and methods for using photosynthetic biomass to purify water, reduce indoor air pollution, remove greenhouse gases including CO.sub.2 from outdoor atmospheric air, and produce biofuel, food products, and fertilizer are provided herein. Also provided herein are systems and methods for enhancing growth of a photosynthetic biomass in a greenhouse.