CHAPTER XIII

COMPOSITION AND PROPERTIES OF SEWAGE

208. Physical Characteristics. 209. Chemical Composition. 210. Significance of Chemical Constituents. 211. Sewage Bacteria. 212. Organic Life in Sewage. 213. Decomposition of Sewage. 214. The Nitrogen Cycle. 215. Plankton and Macroscopic Organisms. 216. Variations in the Quality of Sewage. 217. Sewage Disposal. 218. Methods of Sewage Treatment. 352–371