3. Primary treatment. The wastewater still contains organic solid matter-or human waste. The next stage is to seperate this from the water, and to do this, we put the wastewater into large settlement tanks, which causes the solids to sink to the bottom of the tank. We call these settled solids âsludgeâ.
Between 2004 and 2014, the share of STEM-related bachelor's degrees earned by women decreased in all seven discipline areas: engineering; computer science; earth, atmospheric and ocean sciences; physical sciences; mathematics; biological and agricultural sciences; and social sciences and psychology.
Types of US College Degrees. Earn an associateâs, bachelorâs, masterâs and/or doctoral degree in the US. US college degrees fall under four major categories: associateâs degrees. bachelorâs degrees. masterâs degrees. doctoral degrees.