X CONTENTS 



CHAPTER VIII 



STERILIZATION BY HEAT, CHEMICALS, AND ELECTRICITY 



PAGES 



Removing odour— Metallic salts— Action of manganates and permanganates 

 — Oxynite process — Chlorine and hypochlorites — Bleaching powder — 

 Hermite — Electrozone — Oxychloride — Acids — Berge — Ozone — Liernur 

 process— Disposal of refuse — Destructors ... .. ... 168-201 



CHAPTER IX 



BACTERIAL PURIFICATION 



History of the idea and of early experiments— Mueller's process — Mouras' 

 automatic scavenger — Massachusetts — London — Sutton — Oswestry 

 — Leeds — Triple filtration or contact ... ... ... .. 202-225 



CHAPTER X 



BACTERIAL PURIFICATION {contimted) 

 Capacity of filters — Nature and size of materials — Gases in filters — Depth of 

 beds — Aerating processes — Lowcock — Waring — Ducat — Artificial 

 warming — "Thermal aerobic ' ' — Continuous filtration — Salford — • 

 Stoddart's filter ... ... ... ... ... ... 226-248 



CHAPTER XI 

 BACTERIAL PURIFICATION {continued) 

 Unaided bacterial processes — Scott-MoncriefFs tank — Conditions of hydro- 

 lysis — The- JE^jgter septic \^V — Tank and filter deposits — Statistics of 

 septic tank plants - Moncrieff's trays- -Comparative nitration by different 

 systems — Oxygen relations — Separate zones — Caterham — Manchester 

 experiments — Birmingham — Sheffield — Leeds — American experience 249-281 



CHAPTER XII 



DISTRIBUTION AND DISTRIBUTORS 



Intermittent — Continuous — Stationary Sprayers — Moving Distributors — 



Tippers — Testing Apparatus ... ... ... ... ... 282-309 



CHAPTER XIII 



SEWAGE OUTFALLS AND DISCHARGE 

 Rainfall and storm-water — Separate and combined systems — Storm over- 

 flows — Position of outfalls — Objections and legal remedies — Foreshore 

 smells — Unsightliness — Mud banks — Fish — Water supplies — Con- 

 tamination of shellfish and watercress ... ... ... ... 310-329 



CHAPTER XIV 



AGRICULTURAL VALUE OF BACTERIAL EFFLUENTS — TRADE EFFLUENTS 



Conservation of the valuable constituents of sewage — Economic value of 



nitrated effluents — Trade effluents — Classification — Chemical and 



mechanical treatment — Recovery of products — Wool grease — Relation to 



the bacterial process — Recommendations of the Royal Commission 330-348 



Index 349-355 



