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.

A method for generating and capturing biothermal energy comprising: forming a heap comprising an amended organic material; subjecting the amended organic material to a continuous fermentation process to produce a convection current, and to stimulate capture of non-visible radiation, and using a heat exchanger in contact with the heap, capture and/or store biothermal energy generated by the continuous fermentation process within the heap.

An arrangement (1) for the cultivation of plants and for the utilization of biomass waste and a system (1000) of at least one arrangement (1) for the cultivation and utilization of biomass are disclosed. The arrangement (1) comprises a modular greenhouse (100) and a modular, two-stage biogas plant (200). The system (1000) has at least one arrangement (1) wherein a control and monitoring unit (101) of the modular greenhouse (100) and a further a control and monitoring unit (201) of the two-stage biogas plant (200) are communicatively connected to a central control and monitoring unit (55).

Systems and processes of providing novel thermal energy sources for hydrothermal liquefaction (HTL) reactors are described herein. According to various implementations, the systems and processes use concentrated solar thermal energy from a focused high-energy beam to provide sufficient energy for driving the HTL biomass-to-biocrude process. In addition, other implementations convert biowaste, such as municipal biosolids and grease and food waste, to biocrude using anaerobic digesters, and a portion of the biogas generated by the digesters is used to produce the thermal and/or electrical energy used in the HTL reactor for the biomass-to-biocrude process. Furthermore, alternative implementations may include a hybrid system that uses biogas and solar radiation to provide sufficient thermal energy for the HTL reactor.

The United States faces significant environmental burden to treat and transport ˜0.61 billion kg of defective tomatoes (culled tomatoes) every year. The present disclosure provides for the treatment and processing of culled tomatoes in microbial-electrochemical systems, using the microbial fuel cell as a model reactor. The fundamental differences between the long-term oxidative behavior of unprocessed culled tomatoes compared to the three readily soluble substrates (dextrose, acetate, and wastewater) are disclosed. AC electrochemical impedance spectroscopy (EIS) analyses indicate the influential impedance contributions of the peel & seed to the cull oxidation. Cyclic voltammetry tests indicate that the indigenous redox-active pigments in the cull influence the faradaic processes involved in the cull oxidation.

System (100) and method for processing biomass. The system comprises a combined heat and power plant (102), an interface (114) for feeding biogas to a traffic fuel production unit, interfaces (114) to a district heating system (106a) and an electrical grid (106b), and a hydrolysis device (108), a digestion device (110), a dryer (116) and a heat recovery unit (112), which are operatively coupled for transferring heat, intermediate products and final products of the process, wherein raw biomass is received into the Fuel hydrolysis device (108), biomass processed by the hydrolysis device (108) is fed to the digestion device (110), biogas obtained in the digestion device (110) is fed to the traffic fuel production unit (104), heat is recovered from the hydrolysis device (108), biomass processed by the digestion device (110) is dried by the heat recovered from the hydrolysis device (108), heat is recovered from the dryer (116), heat recovered from the dryer (116) is fed to the hydrolysis device (108) to be used in pre-heating of the received raw biomass, heat recovered from the dryer (116) is fed to the district heating (106a), and production of electricity is fueled by the dried biomass from the dryer (116).

There is provided an accommodation case (1) having a first wall part (33) in which a power supply unit (40) that transmits electric power to a power supply destination in a noncontact state is provided, a second wall part (34) in which a power reception unit (50) that receives electric power that is supplied from a power supply source in a noncontact state is provided, where the second wall part (34) faces the first wall part (33), and an accommodation space (35) that is surrounded by a plurality of wall parts including the first wall part (33) and the second wall part (34).

A portable and modular renewable energy microgeneration apparatus is disclosed that includes at least four modular units. The first modular unit includes a mixing tank and a chopper. The second modular unit includes a buffer tank, a liquor tank, and a pasteurization tank that pasteurizes waste that has been mixed with liquid from the liquor tank by the mixer, chopped into smaller sized components by the chopper, and pre-warmed by the buffer tank. The third modular unit includes a digestion tank that performs anaerobic digestion on pasteurized waste received from the pasteurization tank. And the fourth modular unit includes a gas storage tank that stores gas generated by the waste in at least one of the mixing tank, the chopper, the buffer tank, the liquor tank, the pasteurization tank, and the digestion tank. Each of the four modular units is both portable and modular.

The present invention relates to an anaerobic process for biogas upgrading and hydrogen utilization comprising the use of acidic waste as co-substrate. In this process, H.sub.2 and CO.sub.2 will be converted to CH.sub.4, which will result in lower CO.sub.2 content in the biogas. The invention relates to both in situ and ex situ methods of biogas upgrading. The invention further relates to a bioreactor comprising hollow fibre membranes.

A system includes an anaerobic digestion tank, a gas storage tank, a power generator, a power distribution system, and an electronic control system. The anaerobic digestion tank receives biological waste from a sewer line of a multi-unit building, and allows the received biological waste to be digested to produce a combustible gas. The gas storage tank stores the combustible gas. The power generator combusts the combustible gas to produce at least one of electrical power or heat. The power distribution system receives the electrical power from the power generator, stores at least some of the electrical power, and distributes at least some of the stored electrical power to one or more electrical devices. The electronic control system controls an operation of the system.