Disclosed is a method for reducing methane emission from slurry (2) produced in a livestock farm (1). The method comprises the steps of guiding the slurry (2) from the livestock farm (1) to a dewatering unit (12) in which the slurry (2) is at least partially dewatered by extracting a watery fraction of said slurry (13), guiding the slurry from the dewatering unit (12) to a steam dryer (3), drying the slurry in the steam dryer (3), guiding the dried slurry (4) into a pyrolysis reactor (5) to produce pyrolysis gas (6) and biochar (7) through a pyrolysis process in the pyrolysis reactor (5), guiding at least a portion of the pyrolysis gas (6) to a combustion unit (8) in which the pyrolysis gas portion is combusted to raise the temperature of the combusted pyrolysis gas (9), guiding the combusted pyrolysis gas (9) to the pyrolysis reactor (5) to drive the pyrolysis process, guiding the combusted pyrolysis gas (9) from the pyrolysis reactor (5) to the steam dryer (3) to increase the temperature of steam (10) in the steam dryer (3), and heating the watery fraction of the slurry 13 to a temperature at least above 75° Celsius by means of the steam (10) from said steam dryer (3). Furthermore, a slurry treatment plant (20) for reducing methane emission from slurry (2) is disclosed.

An apparatus and a method is provided for continuously drying bulk goods, in particular wood fibers and/or wood chips, in a dryer, wherein the drying vapors are led to a dryer circuit, in which the drying vapors are indirectly heated via a heat-exchanger and are conducted to the dryer again.

An apparatus and a method is provided for continuously drying bulk goods, in particular wood fibers and/or wood chips, in a dryer, wherein the drying vapors are led to a dryer circuit, in which the drying vapors are indirectly heated via a heat-exchanger and are conducted to the dryer again.

Systems and processes provide for a thermal process to transform sludge (and a variety of other natural waste materials) into electricity. Dewatered sludge and other materials containing a high amount of latent energy are dried into a powdered biofuel using a drying gas produced in the system. The drying gas is recirculated and is heated by the biofuel produced in the system, waste heat (from turbines or internal combustion engines), gas (including natural gas or digester gas) and/or oil. The biofuel is combusted in a boiler system that utilizes a burner operable to burn biofuel and produce heat utilized in a series of heat exchangers that heat the recirculating drying air and steam that powers the turbines for electricity production.

A harvester high efficiency heat utilization device to be used in a harvester, includes: a drying chamber that dries grains of crops; a pipe that communicates with the drying chamber; a first heat exchanger provided in the pipe so as to communicate with an exhaust gas discharge port of an engine of the harvester; a combustion chamber that burns foliage of the crops; a second heat exchanger provided in the pipe so as to communicate with a high temperature gas discharge port of the combustion chamber; and a first blower that guides gas heat-exchanged by the first heat exchanger and the second heat exchanger to the drying chamber through the pipe.

A solid feces treatment apparatus includes a dehydrator extracting a liquid component from first solid feces to produce second solid feces, a dryer evaporating a liquid component of the second solid feces to produce third solid feces, and a combustor burning the third solid feces, wherein the second solid feces have a solid content of about 25% to about 30%, and the third solid feces have a solid content greater than or equal to about 90% and less than about 100%.

Various implementations include a biomass dehydration system including a wet biomass chamber containing wet biomass, a belt or chain defining one or more cavities, two or more pulleys including a drive pulley that the belt or chain extend around and that are configured such that the cavities are disposable within the wet biomass chamber as the belt or chain moves along the pulleys to cause wet biomass to enter the cavities, and a drying chamber for dehydrating wet biomass disposed in the cavities into solid pellets. The drive pulley engages the belt or chain and causes the belt or chain to move around the pulleys. At least a portion of the belt or chain extends from the wet biomass chamber through the drying chamber. One of the pulleys includes one or more ejection protrusions for engaging the cavities and ejecting solid pellets from the cavities.

An apparatus and a method is provided for continuously drying bulk goods, in particular wood fibers and/or wood chips, in a dryer, wherein the drying vapors are led to a dryer circuit, in which the drying vapors are indirectly heated via a heat-exchanger and are conducted to the dryer again.

Disclosed is a slurry drying plant (1) comprising a slurry extruder (3) including a slurry inlet (2) and conveying means (4) arranged to convey the slurry through the slurry extruder (3) and force the slurry out of a plurality of exit openings (5) of the slurry extruder (3) to form a plurality of slurry strings (7), wherein the slurry strings (7) are forced out into a drying chamber (8) in which the plurality of slurry strings (7) is dried. The slurry drying plant (1) further comprises slurry heating means (6) comprising flow means for passing superheated steam past the slurry strings (7) in the drying chamber (8), and inlet pressure detection means (9) for detecting a slurry inlet pressure at the slurry inlet (2). The slurry drying plant (1) also comprises control means (17) arranged to control the conveying speed of the conveying means (4) in response to the slurry inlet pressure. Furthermore, a method for drying slurry and use of a slurry drying plant (1) is disclosed.

A technique, method and system for drying a solid waste stream in a pyrolysis recycling installation, including drying the waste stream in a first dryer, feeding the partially dried waste stream from the first dryer to a second dryer, further drying the waste stream in the second dryer to produce a dried waste stream, and feeding the dried waste stream from the second dryer to a pyrolysis unit, wherein the first and second dryers dry the waste stream primarily, or exclusively, using heat generated from the pyrolysis unit.