Disclosed is a method for promoting anaerobic digestion using carbonyl iron, relating to the technical field of biological fermentation. The method includes the following steps: adding carbonyl iron into a fermentation broth for anaerobic digestion. According to the present disclosure, a substrate added in the fermentation broth is animal manure, kitchen waste or tail vegetables.

The present invention relates to an organic matter biodigester comprising a tank that has an organic matter inlet, a first connection arranged in an upper portion of the tank and a second connection arranged in the lower portion of the tank. Furthermore, said tank also has a biogas outlet and a lower surface configured to rest on a support surface. Furthermore, the lower portion of the tank is at a shorter distance from the support surface compared to the upper portion of the tank. Said organic matter biodigester also comprises a manual pump with a pump inlet connected in the second connection, and a pump outlet connected in the first connection of the tank. The pump is configured to recirculate the organic matter inside the tank from the second connection towards the first connection; and a porous layer arranged inside the tank.

The present invention relates to an organic matter biodigester comprising a tank that has an organic matter inlet, a first connection arranged in an upper portion of the tank and a second connection arranged in the lower portion of the tank. Furthermore, said tank also has a biogas outlet and a lower surface configured to rest on a support surface. Furthermore, the lower portion of the tank is at a shorter distance from the support surface compared to the upper portion of the tank. Said organic matter biodigester also comprises a manual pump with a pump inlet connected in the second connection, and a pump outlet connected in the first connection of the tank. The pump is configured to recirculate the organic matter inside the tank from the second connection towards the first connection; and a porous layer arranged inside the tank.

The invention relates to a method and a plant for treating or regenerating spent bleaching sands/earths from a plant for the production of biofuel, in particular from the bleaching pre-treatment of feedstocks of plant origin that are used for the production of biofuels.

The method comprises a first pre-treatment step in which the bleaching earths mixed with neutral water or with gummy acid water are neutralised by adding a base, preferably calcium hydroxide, in order to bring the pH to neutrality.

Subsequently the neutralised bleaching earths are subjected to anaerobic digestion by a biomass comprising anaerobic bacteria. During the digestion biogas, which may optionally be subjected to purification, and a solid/liquid suspension are generated.

The solid/liquid suspension is subsequently separated into a solid component comprising the bleaching earths and a liquid component comprising the digestate.

The bleaching earths are then subjected to heat treatment, at a temperature between 400 C. and 600 C.

Then follows a reactivation of the heat-treated bleaching earths with the aid of an acid solution and drying of the regenerated earths to render them usable in a plant for the production of biofuels.

The invention relates to a method and a plant for treating or regenerating spent bleaching sands/earths from a plant for the production of biofuel, in particular from the bleaching pre-treatment of feedstocks of plant origin that are used for the production of biofuels.

The method comprises a first pre-treatment step in which the bleaching earths mixed with neutral water or with gummy acid water are neutralised by adding a base, preferably calcium hydroxide, in order to bring the pH to neutrality.

Subsequently the neutralised bleaching earths are subjected to anaerobic digestion by a biomass comprising anaerobic bacteria. During the digestion biogas, which may optionally be subjected to purification, and a solid/liquid suspension are generated.

The solid/liquid suspension is subsequently separated into a solid component comprising the bleaching earths and a liquid component comprising the digestate.

The bleaching earths are then subjected to heat treatment, at a temperature between 400 C. and 600 C.

Then follows a reactivation of the heat-treated bleaching earths with the aid of an acid solution and drying of the regenerated earths to render them usable in a plant for the production of biofuels.

Provided is an energy-saving, environmentally friendly biogas generation system that can reduce the generation of digestive fluid, can efficiently cause methane fermentation by removing ammonia in organic matter regardless of the freshness of the organic matter. The biogas generation system includes a sealed container 2 that contains the organic matter, a stirrer 3 that stirs the organic matter contained in the sealed container 2, a gas-fired boiler 4 that heats the inside of the sealed container 2 to a predetermined temperature, a vacuum pump 5 that reduces pressure in the sealed container 2, and a storage tank 6 that stores biogas generated by methane fermentation of the organic matter in the sealed container 2. Part of the biogas stored in the storage tank 6 is supplied to the gas-fired boiler 4 as fuel.

The present invention relates to a method for digesting biodegradable packaging waste and an apparatus thereof. Specifically, the present invention relates to a method of treating biodegradable packaging waste prior to subjecting the biodegradable packaging waste to a biological valorisation process and an apparatus thereof. The apparatus includes a tank for receiving the biodegradable packaging waste therein, the tank comprises a top portion and a bottom portion below the top portion, an air supply module adapted to supply air into the tank, a microbe injector adapted to inject mesophilic microbe into the tank, such that the tank is adapted to receive the biodegradable packaging waste, air and mesophilic microbe therein, wherein the biodegradable packaging waste is subjected to mesophilic aerobic digestion prior to conveying the biodegradable packaging waste from the tank to a biological valorisation system to subject the biodegradable packaging waste to the biological valorisation process.

A method and system for composting shoes allows shoes to be degraded alongside the composting of compostable material during operation of a single composting vessel. The system includes one or more containers that separate the shoes from the compostable material during operation of the composting vessel. The shoes are subject to multiple runs of the composting vessel. During each run of the composting vessel a new batch of compostable material is composted alongside the shoes.

Disclosed is a method for promoting anaerobic digestion using carbonyl iron, relating to the technical field of biological fermentation. The method includes the following steps: adding carbonyl iron into a fermentation broth for anaerobic digestion. According to the present disclosure, a substrate added in the fermentation broth is animal manure, kitchen waste or tail vegetables.

Disclosed is a method for promoting anaerobic digestion using carbonyl iron, relating to the technical field of biological fermentation. The method includes the following steps: adding carbonyl iron into a fermentation broth for anaerobic digestion. According to the present disclosure, a substrate added in the fermentation broth is animal manure, kitchen waste or tail vegetables.