INDEX 



I 



ABC process, i6o 



Accrington, sewage treatment, 152, 242 



Acetates, fermentation of, 109 



Acidity of sewage, 32, 344 



Acids organic, 109 



,, ,, sterilization by, 192 



Acreage of land required, 147 

 Acts, Rivers Pollution, 170 

 Adams' Automatic Syphons, 283 

 Adeney's limit of impurity, 58 

 Adsorption, 133, 223 

 Aeration figure, 50, 53 



,, of water, 48, 189 



,, processes, 122, 234, 236 



,, stage, 121 

 Aerobacter, 114 

 Aerobic bacteria, 63, 72, no 

 Africa, South, sewage treatment in, 272 

 Agar-agar, 62 



Agriculture, relation of sewage to, 137, 331 

 Algae, 78, 82 



Alkalies in sewage, 41, 200, 332 

 Alkalinity, fixed and volatile, 28, 32, 124, 



125, 206 

 Albuminoid {see Ammonia albuminoid) 

 Albuminous substances, decomposition of, 



98. 105, 117 

 Alumina process, 157 



Aluminium salts, precipitation by, 157, 335 

 Alumino-ferric, 84, 158, 335 

 Alum, 158 



Alternating gear, 258, 283, 285 

 Ames tank, 266 



America, discl:arge of sewage into streams, 

 15, 18, 56 



,, Massachusetts experiments, 46, 

 84, 159, 207, 209, 226, 269 



,, sewage methods, 21, 140, 206-209, 

 225, 281 



,, street sweepings, 198, 200 



,, typhoid from sewage mud, 4 



,, water-supply, 4, 84, 208 

 Ammonia, absorption, 173 



,, albuminoid, meaning of, 57, 108, 



238 



,, decompositions, 99, 251 



,, effect on nitrification, 124 



,, ,, plants, 330 



,, free and albuminoid, determina- 



tion of, 35, 45, 174 



,, recovery from sewage, 195, 333 



Amido-compounds, changes of, 106 

 Amines, 108 

 Anioebas, 78 

 Anabaena, 82 

 Analysis, bacterial processes, 61 



„ chemical processes, 31-54 



Anaerobic bacteria, 64, 72, 189 

 ,, changes, 98, 112, 252 

 ,, cultures, 64 



,, tanks (see Septic tanks) 



Anguillula, 77 



Antagonism of bacteria, 100 



Antiseptic treatment (see Chemical) 



Antiseptics, interference with bacterial 

 action, 66, 343 



Area of land required, 147 



Aromatic compounds, no 



Arsenical liquors, 343, 344 



Ash of sewage, determination of, 33 



Ashes, 10, 197 



Ashtead experiments, 250, 269 



Ashton-Booth sludge remover, 164 



Asparagin and aspartic acid, 107 



Australia, 115, 152 



Automatic gear, 259, 283 287 

 scavenger. 205 



Available chlorine, 180 



oxygen, 16, 130, 271 



B 

 Bacillus amylobacter, 72, 75, no 

 ,, anthracis, 93, 94 

 ,, aquatilis, 72, 128 

 ,, arborescens, 72, 215 

 ,, coli communis, 66, 72, 74, 89, 92, 

 97, 102, 129, 137, 169, 175, 188, 

 193. 215 

 ,, denitrificans, lor, 127, 129 

 ,, desulphuricans, 114 

 ,, enteritidis sporogenes, 73. 87, 88, 



89, 104, 169, 175, 188, 193, 215 

 ,, erythrosporus, yy 

 ,, fermentationis cellulosae, in 

 ,, fiuorescens liquefaciens, 72, 104, 



129 

 ,, mesentericus, 74, in, 129 

 ,, mycoides, 72, 97 

 ,, prodigiosus, 9, loi, 108, 215 

 ,, pseudo-tuberculosis, 93 

 ,, pyocyaneus, 73, 93, 97, loi, 127, 



129 

 ,, subtilis, 73. 74, 97, 191, 194 

 ! ,, tuberculosis, 105, 215 



j ,, typhosus, 86, 89, 105, 137, 175 



,, ureae, 73, 108 



See also Chap. IV. , p. 72, etc. 

 Bacteria as a test for pollution, 8 

 ,, beds, 75, 100, 210 

 I ,, counting, 63, 77, loi 



I , , colonies of, 62 



' ,, cultivation media, 62, 66, 67 



I ,, in sludge. 165 



,, in soil, 136 

 ■ ,, pathogenic, 84, 100 



349 



