A soil gas extracting apparatus is used to vent hazardous soil gases out of the ground and into the atmosphere. The soil gas extracting apparatus makes use of a compressed air nozzle, a compressed air source, a vacuum-inducing tubular chamber, and a gas-receiving line to safely remove soil gases from the ground. The compressed air source forces air through the compressed air nozzle in order to generate a vacuum within the vacuum-inducing tubular chamber as the air flows into the gas-receiving line. The vacuum draws soil gases into the vacuum-inducing tubular chamber in order for the soil gases to be mixed with the air within the gas-receiving line and vented into the atmosphere.

Systems and methods for controlling extraction of landfill gas from a landfill via a gas extraction system are provided herein. According to some aspects of the technology, there is provided site-level control methods for globally controlling one or more wells based on one or more characteristics of aggregate landfill gas collected from a plurality of wells at a gas output. According to some aspects of the technology, there is provided well-level control methods for locally controlling a first well based on or more characteristics of landfill gas collected from the first well. According to further aspects of the technology, there is provided hybrid control methods for making adjustments to a respective well based on both site-level and well-level control methods.

An indirect thermal desorption device with two-section screw conveyors, includes: an upper skid and a lower skid below the upper skid. An upper layer thermal desorption chamber, a feeding hopper, an feed airlock, an air pre-heater, a blower; a first quench spray tower, a second quench spray tower, a demister and an induced draft fan are provided in the upper skid. A lower layer thermal desorption chamber, an activated carbon filter tank, a combustion chamber, a discharge hopper and an discharge airlock are provided inside the lower skid. A first screw conveyor is provided in the upper layer thermal desorption chamber, and an upper layer fume jacket is covered on the upper layer thermal desorption chamber. A second screw conveyor is provided in the lower layer thermal desorption chamber, and a lower layer fume jacket is covered on the lower layer thermal desorption chamber.

A process is described for injecting re-agents or amendants for treating a contaminated subsoil, comprising the steps of: arranging at least one hole (3) in the subsoil; inserting into the hole (3) at least one piping (1), the piping (1) being longitudinally equipped with at least one first valve (2); inserting or arranging at least one injecting means into the piping (1); injecting (7) at least one fluid into the subsoil through the injecting means, next to the first valve (2) in open configuration; removing possible residuals present in the piping (1) following the injection (7) of the fluid, the process being adapted to inject substances for decontaminating the subsoil by selectively injecting an amount of the fluid, through one or more valves included between at least one natural level (8) and at least one terminal depth (9).

A modular soil treatment system and apparatus for treating soils contaminated by petroleum hydrocarbons such as gasoline, diesel and heating oil, chlorinated hydrocarbons and volatile organic compounds is disclosed which can be transported to any site and reused.

A system for intercepting, treating and venting vapors from contaminated groundwater includes a borehole that extends into the groundwater and has an open top end, a porous liner against the outer wall of the borehole and porous fill material inside the liner. The fill material can include materials to retard and degrade contaminants in the vapors. The system can include a slotted aeration tube in the borehole, vegetation planted in the open end of the borehole, impermeable sections in the liner, and impermeable ground cover around the top end of the borehole. A method for intercepting, treating and venting of vapors from contaminated groundwater includes the system and pulling vapors out the top end of the borehole with variations in atmospheric barometric pressure.

A soil gas extracting apparatus is used to vent hazardous soil gases out of the ground and into the atmosphere. The soil gas extracting apparatus makes use of a compressed air nozzle, a compressed air source, a vacuum-inducing tubular chamber, and a gas-receiving line to safely remove soil gases from the ground. The compressed air source forces air through the compressed air nozzle in order to generate a vacuum within the vacuum-inducing tubular chamber as the air flows into the gas-receiving line. The vacuum draws soil gases into the vacuum-inducing tubular chamber in order for the soil gases to be mixed with the air within the gas-receiving line and vented into the atmosphere.

Systems and methods for controlling extraction of landfill gas from a landfill via a gas extraction system are provided herein. According to some aspects of the technology, there is provided site-level control methods for globally controlling one or more wells based on one or more characteristics of aggregate landfill gas collected from a plurality of wells at a gas output. According to some aspects of the technology, there is provided well-level control methods for locally controlling a first well based on or more characteristics of landfill gas collected from the first well. According to further aspects of the technology, there is provided hybrid control methods for making adjustments to a respective well based on both site-level and well-level control methods.

Systems, methods, and apparatuses to drain an air moisture separator are provided herein. A blower may be configured to draw air through the air moisture separator, such that moisture is separated from the air and collected within the air moisture separator. A valve may be configured to permit the moisture to exit the air moisture separator based on a pressure within the air moisture separator. A controller may be configured to deactivate the blower based on a first determination and activate the blower based on a second determination. The first determination and the second determination may be based on measurements detected by one or more sensors.