Combination precipitation 317
Combined load 184
Combined process 230
Combined sludge 209, 241
Competitive reversible inhibition 74
Computer 221, 225
Computer models 261
Concentration distribution 144, 161
Concentration of biomass 63
Contact filter 340
Contact filtration 336, 343
Contact stabilization plant 211
Contact tank 211
Control 261
Criteria 224
Criterium 158
Crustacea 57
Cycle 243
D
Daphnia 57
Decay 65,197,198,225,264
Degradation of biomass 169
Degree of expansion 171
Degree of flocculation 327
Degree of hydrolysis 184, 186
Degree of nitrification 216
Degree of penetration 148
Denitrification 86, 177, 181, 195,
229,230
alkalinity 89
energy sources 92
Environmental factors 92
oxygen 94
pH 94
reaction rate constants 95
temperature 93
Denitrification plant
combined sludge 243
separate sludge 243
Denitrifying bacteria 253
Denitrifying biofilter 233
Denitrifying organisms 230
Denmark (Biodenitro) 245
Index
Dense film 180
Design 248, 258, 265
biofilters 173,223
criteria 173, 218
computerized 261
errors 173
discs 175
dissolved organic matter 176
nitrifying plants 218
trickling filters 173
Destabilization, colloids 324
Desulfovibrio 57
Diffusible matter 184
Diffusible organic matter 268
Diffusion coefficient 143, 152, 233
Diffusion, HC03 203
Diffusion limit 183
Diffusional limitation 151, 153, 235
Digester 221
Dinitrogen oxide 252
Direct precipitation 334, 340
Disc design 175
Disc filter 224
Disc plant 224
Dissolved inert nitrogen 49
Dissolved solids 37
Distribution of concentration 147, 154
Diurnal variation 261
Domestic wastewater 27, 173
Drinking water use 229
E
Easily degradable 262
Efficiency 169
Efficiency factor 146,251,252
organic matter 253
Effluent concentration 173
Effluent criteria, total nitrogen 251
Electron acceptor 59
Endogenous energy sources 93
Energy 172
Energy efficiency 67
Enzyme balance 184
Enzyme production 185, 187
377