Abstract: A portable asphalt heater and method for heating asphalt includes an asphalt hopper having a floor, first and second side walls and front and rear end walls. The side walls taper inwardly to define a substantially inverted-V geometry of the hopper. A heating manifold including a heating chamber is adjacent to and positioned beneath the floor, the heating manifold adapted to be in fluid communication with a heater assembly and to direct a heated gas emitted from the heater assembly through the heating chamber and heating manifold. A plurality of chimneys is in fluid communication with, and extends from, the heating chamber and along the first and second side walls, wherein the volume of asphalt, when in the asphalt hopper, is heated through contact with the asphalt hopper.

Abstract: A method and apparatus is provided for converting a conventional waste water treatment plant for use with BPR and/or BPNR processes downstream of a clarifier. The effluent launder is flooded by means of a dam installed in the effluent launder, and waste water is guided to the outlet of the effluent launder by means of a sluice, thereby minimizing air entrainment and turbulence of the waste water downstream of the dam. Benefits obtained by means of the present invention include reduced noise, reduced emission of noxious and malodorous gasses, reduced losses of VFAs from the waste water, and reduced uptake of oxygen into the waste water. In addition, growth of algae within the clarifier is greatly reduced.