The problem of the present invention is to provide a magnesium hydroxide [Mg(OH).sub.2] fertilizer to supply magnesium to plants without costs and time and to cultivate plants safely and economically using the magnesium hydroxide [Mg(OH).sub.2] fertilizer. The above problem can be solved by effectively using laundry wastewater containing magnesium hydroxide [Mg(OH).sub.2] after washing the laundry using magnesium material containing water and metal magnesium (Mg) as a main component.

A portable renewable energy microgeneration system is disclosed. The system comprises one or more holding tanks that are configured to perform anaerobic digestion on waste in a multi-phase process using bacteria and a controller configured to automatically control the multi-phase process and to re-use the bacteria. The controller re-uses the bacteria by removing at least a portion of the liquid from the waste after anaerobic digestion is performed on the waste and using the at least a portion of the liquid to wet other waste and repeat the multi-phase process.

A portable renewable energy microgeneration system is disclosed. The system comprises one or more holding tanks that are configured to perform anaerobic digestion on waste in a multi-phase process using bacteria and a controller configured to automatically control the multi-phase process and to re-use the bacteria. The controller re-uses the bacteria by removing at least a portion of the liquid from the waste after anaerobic digestion is performed on the waste and using the at least a portion of the liquid to wet other waste and repeat the multi-phase process.

A renewable energy microgeneration apparatus is disclosed that includes a mixing tank that mixes waste with a liquid, a buffer tank that receives and pre-warms the mixed waste, a pasteurization tank that pasteurizes on the pre-warmed mixed waste, a digestion tank that performs anaerobic digestion on the pasteurized waste, a de-watering device that separates liquid digestate and removes salt from the liquid, sensors that measure salinity and biogas quality, and a controller. The controller causes the transfer of digestate from the digestion tank to the pasteurization tank to the dewatering device, causes the de-watering device to separate the liquid and remove the salt from the liquid, monitors the salinity of the liquid and the quality of biogas using the sensors, and causes the mixing of the liquid with the waste and adjusts the feed rate of the waste to reduce the salinity of the waste and increase methane production.

A production process for producing biogas by means of anaerobic co-digestion which includes (a) preparing hydrolyzed biomass from organic solid waste by means of a thermal hydrolysis treatment of waste at between 1.5 and 4.5 bar and between 120 and 160? C., generating raw biomass from which foreign matter is separated, giving rise to clean hydrolyzed biomass with at least 90% organic matter, a volatile solids to total solids ratio of at least 0.6 and at least 5% total solids; (b) mixing the clean hydrolyzed biomass with sludge from a wastewater treatment plant (WWTP), generating a mixture with a concentration of solids of less than 30% which is conditioned to a concentration of less than 20%; and (c) a step of wet anaerobic digestion in a digester at between 25? C. and 40? C. or between 50? ? C. and 60? C. and during an HRT of between 12 and 30 days, generating biogas and a digestate.

A production process for producing biogas by means of anaerobic co-digestion which includes (a) preparing hydrolyzed biomass from organic solid waste by means of a thermal hydrolysis treatment of waste at between 1.5 and 4.5 bar and between 120 and 160? C., generating raw biomass from which foreign matter is separated, giving rise to clean hydrolyzed biomass with at least 90% organic matter, a volatile solids to total solids ratio of at least 0.6 and at least 5% total solids; (b) mixing the clean hydrolyzed biomass with sludge from a wastewater treatment plant (WWTP), generating a mixture with a concentration of solids of less than 30% which is conditioned to a concentration of less than 20%; and (c) a step of wet anaerobic digestion in a digester at between 25? C. and 40? C. or between 50? ? C. and 60? C. and during an HRT of between 12 and 30 days, generating biogas and a digestate.

The present disclosure relates to environmentally-clean thermal drying systems and methods. In accordance with one aspect, a method for thermal drying includes receiving a grease-related waste, burning the grease-related waste in a furnace to generate heat energy, receiving a bio-waste in an indirect dryer at an adjustable feed rate, drying the bio-waste in the indirect dryer using at least some of the heat energy, and metering the bio-waste into the indirect dryer at the adjustable feed rate. The adjustable feed rate is adjusted based on a percentage of solids of the bio-waste before entering the indirect dryer and a temperature within the indirect dryer, where the indirect dryer and the adjustable feed rate are coordinated to achieve a predetermined percentage of solids in a dried bio-waste exiting the indirect dryer.

The present disclosure relates to environmentally-clean thermal drying systems and methods. In accordance with one aspect, a method for thermal drying includes receiving a grease-related waste, burning the grease-related waste in a furnace to generate heat energy, receiving a bio-waste in an indirect dryer at an adjustable feed rate, drying the bio-waste in the indirect dryer using at least some of the heat energy, and metering the bio-waste into the indirect dryer at the adjustable feed rate. The adjustable feed rate is adjusted based on a percentage of solids of the bio-waste before entering the indirect dryer and a temperature within the indirect dryer, where the indirect dryer and the adjustable feed rate are coordinated to achieve a predetermined percentage of solids in a dried bio-waste exiting the indirect dryer.

The present invention relates to a process wherein organic material derived from plant and animal material is processed to recover nutritional elements. In particular, there is provided a process for releasing nutritional elements from plant and animal material comprising the steps of treating the material with one or more enzymes to digest said material under appropriate conditions and separating the resulting liquid hydrolysate from the undigested material.

The present invention relates to a process wherein organic material derived from plant and animal material is processed to recover nutritional elements. In particular, there is provided a process for releasing nutritional elements from plant and animal material comprising the steps of treating the material with one or more enzymes to digest said material under appropriate conditions and separating the resulting liquid hydrolysate from the undigested material.