Percolating filters, 85
” ” aeration of, 86
” ” capacity of, 222
” ” distributors for, 106
” ” floor-tiles for, 91
” ” floors for, 88
” ” general design of, 85
” ” material for, 101
” ” methods of distribution on, 104
” ” ” of feeding, 159
” ” planning of, 98
” ” sprinklers for, 106
” ” sub-drainage of, 90
” ” types of construction of, 87
” ” walls for, 95
Ponding valve, 178
Power-driven distributors, 129, 140
Precipitation tanks, 47
Preliminary processes (_see_ TANKS, _also_ SLATE BEDS)
Recording apparatus, 234—239
Revolving distributors, 106
Royal Commission on Sewage Disposal, recommendations, 3, 16, 23,
29, 32, 182, 224, 226, 227
Ryder, E. E., 93
Salford fixed spray, 155
Sand-filters, 185
“Scott-Moncrieff” distributor, 130
Screens, 3
” bars for, 4
” for deep sewers, 7
” mechanical, 7
” ” rake, cleaning gear for, 12, 14
” rotary, 5
” simple, 3
“Separator” tank, 65
Sewage mixers, 73
Shone and Ault, 53
“Simplex” distributor, 125
Skegness tank, 59
Slate beds, 67
” slabs and blocks, 68, 92
Sludge disposal, 71
” draining beds, 83
” drying apparatus, 81
” presses, 75
” pressing plant, complete installation, 77
” removal, 25, 28, 35, 71
” ” apparatus for, 27
” ” elevators for, 40, 41, 42
” ” well for, 38
Spray jets, 147
Sprinklers, 106
Stand-by tanks for storm water, 229
Sterilisation of sewage effluents, 240
Sterilising solutions, 242
” ” apparatus for the manufacture of, 242—247
” ” ” for the injection of, 247—250
“Stoddart” distributor, 142
Storm-water overflow, diverting plate for, 17
” ” fixed weirs, 17
” ” floating weir, 21
” ” movable weirs, 21
” ” swinging syphon for, 21
” ” weirs, 16
” tanks, capacity of, 227
” treatment, 227
Strength of sewage, 226
Supply pipes, 163
“Sypho-jet” distributor, 110
TANKS, 29
” Candy-Whittaker, 60
” capacity of, 29
” circular, 25, 51—59, 60, 61, 66
” continuous-flow settlement without chemicals, 29, 32
” ” ” ” with chemicals, 29, 32, 47
” decanting valve for, 49
” detritus, 23
” Dortmund type, 25, 51, 52
” Fieldhouse, 65
” floating outlet for, 48
” hydrolytic, 52
” Imhof, 57
” inlets and outlets for, 40—47
” ”Kessel” type, 63
” non-septic, 61
” precipitation, 47
” quiescent settlement without chemicals, 29, 32
” ” ” with chemicals, 29, 32
” rate of flow through, 34
” rectangular, 33, 36, 37, 43—50
” roofs for, 39
” ”separator”, 65
” septic, 29, 32
” Skegness, 59
” storm-water, 229
Taylor, W. Gavin, 105
Travelling distributors, 138
Travis, W. O., 52
Trays and troughs, 143
“Triple tank” system, 145
“Venturi” meter, 237
Walls of filters, 95
Waterbury fixed sprays, 155
Watson, J. D., 93, 130
Weirs, fixed volume, 21
“Whirl” spray jet, 149
Willcox and Raikes, 49, 96, 135