primary sewage treatment
81Rawa River — Infobox River | river name = Rawa caption = Rawa flowing through Katowice origin = Ruda Śląska mouth = Brynica, Sosnowiec basin countries = Poland length = 19,6 km watershed = 89,8 km²;Rawa (pronounced: IPA pl|,|r|a|w|a), older name Roździanka )… …
82microbiology — microbiological /muy kroh buy euh loj i keuhl/, microbiologic, adj. microbiologically, adv. microbiologist, n. /muy kroh buy ol euh jee/, n. the branch of biology dealing with the structure, function, uses, and modes of existence of microscopic… …
83Solar energy — is the light and radiant heat from the Sun that powers Earth s climate and weather and sustains life. Since ancient times it has been harnessed for human use through a range of technologies. Solar radiation along with secondary solar resources… …
84Silver — This article is about the chemical element. For the color, see Silver (color). For other uses, see Silver (disambiguation). palladium ← silver → cadmium …
85Environmental engineering — [cite book|author=Danny D. Reible|title=Fundamentals of Environmental Engineering |publisher=CRC Publishers|year=1998|id=ISBN 1 56670 047 7] [cite book |author=James R. Mihelcic, Martin T. Auer, and others |title=Fundamentals of Environmental… …
86Denitrification — Nitrogen cycle. Denitrification is a microbially facilitated process of nitrate reduction that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products. This respiratory process reduces… …
87Anammox — Enrichment culture of the anammox bacterium Kuenenia stuttgartiensis, Radboud University Nijmegen Anammox, an abbreviation for ANaerobic AMMonium OXidation, is a globally important microbial process of the nitrogen cycle [1]. The bacteria… …
88Northeast Blackout of 2003 — The Northeast Blackout of 2003 was a massive widespread power outage that occurred throughout parts of the Northeastern and Midwestern United States, and Ontario, Canada on Thursday, August 14, 2003, at approximately 4:15 pm EDT (20:15 UTC), with …
89Mound system — A mound system is an alternative to the traditional rural septic system leach field. The mound system is an engineered leaching field used in areas where septic systems are more prone to failure due to having extremely slow or extremely fast… …
90Reno, Nevada — Reno redirects here. For other uses, see Reno (disambiguation). Reno   City   Reno Arch …
