Pure oxygen activated sludge aeration systems are sealed-tank reactor vessels with surface aerator type impellers mounted within the tanks at the oxygen atmosphere-mixed liquor surface interface. The amount of oxygen entrainment, or DO (Dissolved Oxygen), can be controlled by a weir adjusted level control, and a vent gas oxygen controlled oxygen feed valve. Oxygen is generated on site by cryogenic distillation of air, pressure swing adsorption , or other methods. These systems are used where wastewater plant space is at a premium and high sewage throughput is required as high energy costs are involved in purifying oxygen.
For centuries, Bordeaux has assumed a mythical status in the world of fine wine as a leitmotif of wealth, power and influence, but its prosperity has always been linked to the capricious nature of markets and the shifting fortunes of global economies. Now change is coming to Bordeaux, with traditional customers like the US and the UK falling away, as China's new rich push prices to stratospheric levels. The demand is unprecedented, but the product is finite and this new client wants it all. Will the China market be the bubble that never bursts or the biggest threat yet to Bordeaux's centuries old reputation? Written by Anonymous
Like baseball, camping with the family is one of America’s favorite pastimes. Manufacturers have been introducing new and improved features year after year from sleeping astronomical amounts of people in teeny tiny spaces to adding on sliding doors, patios, outdoor kitchens and more! We have put together a list of some of our favorite bunkhouse floorplans of 2016, because what makes you think of camping with the family (or wanting room for extra guests) than a bunkhouse. All of these floorplans have been hand picked to showcase a variety of family friendly RVs each with unique features suited to different campers needs.