Abstract: A system and method for monitoring or controlling an aerobic landfill bioreactor having a plurality of zones each including at least one well head. The system comprises: a gas extraction blower, a plurality of temperature sensors disposed in the well heads, an ex-situ relative humidity detector, an ex-situ gas constituent detector, an air injection system, a liquid injection system, and a controller. Landfill gas is extracted by the blower and it's temperature, relative humidity, and gas constituents are measured. The system further comprises a system of headers, isolation valves, and flow control valves which serve to isolate zones for measurement and/or air and liquid injection as well as control the flow of either the landfill gas extraction or liquid and air injection. The method involves measuring: temperature, relative humidity, and gas constituents of the extracted landfill gas.

Abstract: A system and method for monitoring or controlling an aerobic landfill bioreactor having a plurality of zones each including at least one well head. The system comprises: a gas extraction blower, a plurality of temperature sensors disposed in the well heads, an ex-situ relative humidity detector, an ex-situ gas constituent detector, an air injection system, a liquid injection system, and a controller. Landfill gas is extracted by the blower and it's temperature, relative humidity, and gas constituents are measured. The system further comprises a system of headers, isolation valves, and flow control valves which serve to isolate zones for measurement and/or air and liquid injection as well as control the flow of either the landfill gas extraction or liquid and air injection. The method involves measuring: temperature, relative humidity, and gas constituents of the extracted landfill gas.

Abstract: A sparking device, in one aspect, includes first and second electrodes for coupling with corresponding first and second electric potentials. The first electrode includes an elongate member having proximal and distal parts. The second electrode includes a body receiving the proximal part. A first insulation portion electrically insulates the proximal part of the elongate member from the body. The first electrode includes an end member connected with the distal part of the elongate member. The end member includes a first section with a plurality of first electrical contacts offset from a longitudinal axis of the device. The body includes a second section with a plurality of second electrical contacts offset from the longitudinal axis.

Abstract: A landfill gas vent flare is provided which includes a flarehead disposed in communication with a landfill gas vent wherein landfill gas is permitted to flow therethrough. A spark plug is located on the flarehead and is electrically connected to a solar powered ignitor which provides electrical impulses to the spark plug at regular predetermined intervals to generate a spark every 1.5 seconds to ignite the landfill gas and ensure the landfill gas burns continuously. The sparks are continuously generated regardless of the presence of landfill gas or flame in the flarehead. The flarehead comprises an inverted, modified frusto-conical structure and includes a plurality of inlets which permit air to enter the flarehead and mix with the landfill gas to facilitate combustion and to further ensure continuous burning of the gas.

Abstract: Gas and/or liquid exchange between an area within a bulk material pile and an area outside the bulk material pile is enabled by establishing a conduit, e.g., a pipe, between the area outside the bulk material pile and the area within the bulk material pile during the formation of the pile and without digging a trench. A porous medium is placed around the conduit in the bulk material pile during formation and without digging a trench to provide for gas and/or liquid exchange between the bulk material and the conduit. The porous medium could be washed stone, or scrap tires and glass bottles. In other embodiments, a conduit is established between the bulk material pile and an area outside the pile, and a leaching chamber is placed over or around the conduit in the pile for gas and/or liquid exchange between the pile and the conduit.

Abstract: Gas and/or liquid exchange between a first area within a bulk material pile and a second area outside the bulk material pile is enabled by creating a substantially horizontal cavity during the formation of the bulk material pile, and establishing a conduit between the cavity and the area outside the bulk material pile during the formation of the bulk material pile. Where the bulk material pile is a solid waste pile, the cavity may be created using a substantially horizontal, elongated leaching chamber, and the conduit may be created with a system of pipes.

Abstract: A method of increasing the capacity of an existing landfill to enable the disposal of additional material therein includes excavating a given volume of material disposed in the existing landfill, comminuting the excavated material sufficiently to permit its close packed disposal in a volume less than the given volume, and placing the excavated, comminuted material back within the landfill.

Abstract: The in situ process for increasing the capacity of a municipal solid waste landfill involves disturbing the municipal solid waste present within a landfill site, adjusting the moisture content of the waste material, adding a lime reagent, stockpiling the waste material and allowing the temperature to increase so that aerobic biostabilization is facilitated and allowing the temperature of the municipal solid waste material to decrease to a stable point. The process can be practiced with the use of currently available types of earth moving and refuse handling equipment and involves the addition of no other substances to the municipal solid waste except lime and water.