Info

National Primary Drinking Water

polymeric flocculants, 116

Regulation, 11

polyvinyl chloride, 94

National Secondary Drinking Water

pore characteristics, 73

Regulations, 25, 26

pore structure, 65

nematodes, 44

pore volume, 144

neutralization, 82

porosity, 111

nonmetallic cloth, 130

potassium permanganate, 39, 253

nonwoven filter media, 131

powder activated carbon, 404

nutrient removal, 239

precipitates, 142

precipitation, 83, 248

pre-coalescer unit, 325

precoating, 195

precoats, 79, 109

present value of net benefits, 586

present value, 583

present worth, 583

pressure filtration, 124, 157, 524

pressure leaf filter, 185, 192 - 199

pre-treatment flocculants, 117

protozoa cysts, 5

protozoa, 5, 44, 459

public water systems, 11

quicklime, 101

rapid sand filter, 246, 257 - 260 red mud flocculation, 117 reference dose, 13 regulations for disinfectants, 16 regulations for disinfection byproducts, 16

regulations for inorganic chemicals, 16- 18

regulations for microorganisms, 15 regulations for organic chemicals, 19-23

regulations for radionuclides, 23 -24

residue management, 84 resin adsorption, 429 resin backwashing, 387 resin fouling, 388 resin performance, 387 retention aids, 117 retentivities on carbon, 433 - 435 retentivity, 150

reverse osmosis economics, 400 -403

reverse osmosis, 34, 335 reverse osmosis, 34, 335, 360 -367

Reynolds number, 271 rigid filter media, 132

rotary drum filter, 185, 204 - 207 roughening filters, 84 rubber media filters, 128 rubber, 2

Safe Drinking Water Act, 12 salts, 142

sand filter configuration, 247 sand filter removal efficiencies, 247 sand filtration unit, 246 sand filtration, 235 sand, 142

secondary standards, 25 sedimentation tanks, 315 sedimentation, 84, 268, 282 - 290 separation number, 295 settling basins, 237, 241 settling regimes, 273 sewage sludge, 117 silicon dioxide, 110 silver, 39, 47 skeletal density, 144 slow sand filter, 35, 256 sludge blanket clarifier, 313 sludge blanket filtration, 264 sludge conditioning, 501 sludge dewatering, 520 sludge lagoons, 545 - 550 sludge stabilization, 501 sludge volume reduction, 550 sludge, 496 - 500 soda ash, 103 - 105 sodium dichloroisocyanurate, 49 sodium zeolite softening, 386 soil conditioning, 568 solid residues, 85 solids contact processes, 260 solids contacting, 263 solids-contact clarifier, 313 Solka-floc, 112 solubility, 92 solvent extraction, 429 sound waves, 451 specific cake resistance, 78

static mixer, 310

unit processes, 3

sterilization technologies, 446

USEAP, 8

Stoke's law, 273 - 275

UV light, 41, 46

storage tanks, 95

UV radiation, 455

straining, 250

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