Abstract: A separation container for extracting a portion of a sample for use or testing and method for preparing samples for downstream use or testing are provided. The separation container may include a body defining an internal chamber. The body may define an opening, and the body may be configured to receive the sample within the internal chamber. The separation container may further include a seal disposed across the opening, such that the seal may be configured to seal the opening of the body, and a plunger movably disposed at least partially inside the internal chamber. The plunger may be configured to be actuated to open the seal and express the portion of the sample.

Abstract: An anaerobic digester for use in wastewater treatment systems having a fixed cover including a central tower for controlling gas and foam. A constant operating level is maintained in the digester by utilization of an overflow weir located in the tower. The fixed cover having an under flat surface that is in direct contact with contents of the digester. The tower has a number of spray nozzles that operably direct movement of foam toward discharge locations.

Abstract: A removable ash collector is for use with barbecue grills having a central ash discharge opening, the grill being supported by outwardly and downwardly extending legs. The ash collector includes a conical support ring, having a downwardly and inwardly sloping inner surface, and a catch basin removably mounted beneath the support ring. The support ring has J-shaped slots in its upper edge by which the ring is mounted to the legs. The support ring acts as a guide for ashes discharged from the ash discharge opening and as the support element for the ash catch basin. The catch basin has a number of generally L-shaped hooks extending from its upper rim which engage appropriately shaped hook supports mounted to the support ring. This permits a catch basin filled with ashes to be removed without the mess or bother associated with conventional ash catchers of the type mounted directly to the legs.