Table of contents: chapter 1. ? introduction chapter 2. ? collection and conveyance of sewage chapter 3. ? wastewater flow rates chapter 4. ? hydraulic design of sewers chapter 5. ? construction of sewers chapter 6. ? sewer appurtenances chapter 7. ? sewage pumping chapter 8. ? wastewater characteristics chapter 9. ? natural methods of wastewater disposal chapter 10. Unit operations for wastewater treatment chapter 11. Preliminary treatment chapter 12. Sedimentation and chemical clarification chapter 13. Biological treatment i : sewage filtration chapter 14. Biological treatment ii : activated sludge process chapter 15. Biological treatment iii : miscellaneous methods chapter 16. Treatment and disposal of sludge chapter 17. Septic and imhoff tanks chapter 18. Advanced wastewater treatment chapter 19. Industrial wastewater treatment chapter 20. House drainage chapter 21. Rural sanitation chapter 22. Solid waste disposal chapter 23. Air pollution appendix index subjects: civil,engineering and technology - from Amzon