The present invention discloses a system for consolidating hydraulic reclamation silt by combined flocculation and deep boosted vacuum preloading, comprising an agitation tank, wherein the agitation tank is connected to a flocculant preparation tank and a slurry delivery device; a tank bottom valve and a filter plate mechanism are successively arranged at a lower delivery port of a precipitation zone of a dehydration tank; weep holes are formed on filter plates; there is a discharge zone below the precipitation zone of the dehydration tank; a drainage plate is provided on an upper side wall of the precipitation zone; a water storage coaming is provided outside the drainage plate; the water storage coaming and the drainage plate are enclosed to form a water storage zone; the water storage zone is connected to a reservoir via a second delivery pipe with a second delivery pump provided thereon; a water pumping port is provided within the discharge zone; the water pumping port is connected to the reservoir via a third delivery pipe with a third delivery pump provided thereon; and, the discharge valve below the discharge zone is connected to a deep boosted drainage tank. The present invention further provides a method for consolidating hydraulic reclamation silt by using the system. The system and the method for consolidating hydraulic reclamation silt implemented by the system can more thoroughly discharge water in the slurry, so that the soil becomes drier and harder and can be directly used in the landfill of earthwork; moreover, a greater amount of water can be collected.

A rock sample includes multiple rock samples that are each obtained from the borehole. The rock samples have been exposed to contamination during a drilling operation to drill the borehole. The rock sample is split into a first sample portion and a second sample portion. The first sample portion is decontaminated with a solvent. The second sample portion is decontaminated by thermovaporization for an initial duration of time at an initial thermovaporization temperature below that of a cracking temperature of an organic matter carried within the rock sample. A difference between a first pyrolysis Tmax value of the first sample portion decontaminated by the solvent and a second pyrolysis Tmax value of the second sample portion decontaminated by the thermovaporization is determined to satisfy a decontamination level threshold. The remainder of rock samples are decontaminated by the thermovaporization in response to determining that the difference satisfies the decontamination level threshold.

The present invention relates to an apparatus for treating waste containing mercury and a method for recovering high purity elemental mercury using the apparatus. More specifically, the present invention may provide a method that can more economically and stably recover high purity elemental mercury from waste containing mercury using an apparatus for recovering mercury from waste containing mercury, the apparatus comprising: a thermal desorption unit; a dust control unit; and a condensation and recovery unit, which are connected in series. The present invention has an advantage in that, compared to a conventional simple heat treatment-condensation method, a high recovery rate of mercury is achieved and high purity mercury can be obtained.

Provided herein are methods of drawing out oils and/or fats (e.g., hydrocarbons) from a solid material (such as, e.g., metal or rock, e.g., a hydrocarbon bearing geologic formation). The methods comprise fumigating the solid material with a gas containing chlorine dioxide, thereby drawing out oil and/or fat from the solid material. The methods can be used, e.g., to clean solid materials used in industry and to enhance the recovery of crude oil and/or natural gas from petroleum wells.

The present invention discloses a system for consolidating hydraulic reclamation silt by combined flocculation and deep boosted vacuum preloading, comprising an agitation tank, wherein the agitation tank is connected to a flocculant preparation tank and a slurry delivery device; a tank bottom valve and a filter plate mechanism are successively arranged at a lower delivery port of a precipitation zone of a dehydration tank; weep holes are formed on filter plates; there is a discharge zone below the precipitation zone of the dehydration tank; a drainage plate is provided on an upper side wall of the precipitation zone; a water storage coaming is provided outside the drainage plate; the water storage coaming and the drainage plate are enclosed to form a water storage zone; the water storage zone is connected to a reservoir via a second delivery pipe with a second delivery pump provided thereon; a water pumping port is provided within the discharge zone; the water pumping port is connected to the reservoir via a third delivery pipe with a third delivery pump provided thereon; and, the discharge valve below the discharge zone is connected to a deep boosted drainage tank. The present invention further provides a method for consolidating hydraulic reclamation silt by using the system. The system and the method for consolidating hydraulic reclamation silt implemented by the system can more thoroughly discharge water in the slurry, so that the soil becomes drier and harder and can be directly used in the landfill of earthwork; moreover, a greater amount of water can be collected.

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.

A control system for controlling extraction of landfill gas from a landfill via a gas extraction system, the gas extraction system comprising well piping for coupling a plurality of wells to a gas output. The control system comprises a controller configured to: obtain a value indicating measured energy content of landfill gas collected at the gas output from the plurality of wells; determine whether the measured energy content is different from a target energy content; and in response to determining that the measured energy content is different from the target energy content: control a plurality of valves disposed in the well piping to change flow rates of landfill gas being extracted from at least some of the plurality of wells at least in part by changing degrees to which the plurality of valves are open.

A process for treating contaminated subsoil is provided that includes arranging at least one hole in contaminated subsoil, inserting at least one piping into the at least one hole, the at least one piping being longitudinally equipped with at least one first valve; inserting or arranging at least one injecting means into the at least one piping, and injecting at least one fluid into the contaminated subsoil through the at least one injecting means and next to the at least one first valve in open configuration; and removing possible residuals present in the at least one piping following the injection of the at least one fluid.

A composite material having a plurality of drainage members intersecting to provide interconnected fluid drainage paths.

A system to excavate and remove underground noxious vapors includes a suction wand in fluid communication with a debris tank. A collar is fitted around the suction wand and is configured to seal noxious vapors within a hole around the suction wand. A primary valve is used to control whether the suction wand is being used to excavate material to send to the debris tank, or whether the suction wand is being used to remove noxious vapors from the hole to send to a filtration unit. A monitor is configured to detect explosive concentrates in the noxious vapors to determine whether the explosive concentrates exceed an acceptable level. In addition, the system is configured to dilute and filter the noxious vapors before discharging to the atmosphere.