Disinfection 100 Hypo-chlorite of lime 101 Liquid chlorine 101 Activated sludge process 101–102–103–104 Combination of processes 79 Electrolytic process 104 Efficiency of processes 80 Management and supervision 108–109 Miles acid sludge process 105 Sludge disposal and value 106–107–108 Trade wastes 105 ASHES AND RUBBISH Collection Systems: Types of systems 120–121 Combined 121–122–123 Separate 120–122–123 Method of collection: Municipal 123–124 Contract 124 Private 123 Districting the city 124–125 Organization of force 125 Type of equipment 126–127–128 Cans 126 Vehicles 127–128 Location of receptacles 128–129 Time of collection 129–130 Frequency of collection 130–131 Enforcement of regulations 131 Disposal of Ashes and Rubbish 132 Dumping 132 Burning 132–133 Revenue from By-Products 133–134 Specifications 135–136–137 Efficiency Tests and Suggestions 138–139 Per Capita Production 139 Cost data 140 GARBAGE COLLECTION AND DISPOSAL Types of Collection Systems 152–153–154 Combined 153 Separate 153 Method of Collection 154–155–156