31. Prior to 1909, Phelps conducted numerous experiments on chlorination of sewage and sewage disposal plant effluents. 32. It also included a pump for reconstructing the Mir's sewage disposal system, which failed a month ago. 33. The government said it would sell water distribution and sewage disposal and treatment concessions in individual municipalities. 34. TEES continued its highway research, while starting research on gasoline, rural electricity needs and urban sewage disposal . 35. The lack of piped water and sewage disposal system is critical in underserved areas of the neighborhood. 36. The High Priority Program, including Stage One of the Strategic Sewage Disposal Scheme, would not be affected. 37. Millions of pounds have been spent on the introduction of new water treatment and sewage disposal plants. 38. Minimum distances and soil percolation requirements between sewage disposal sites and water wells need to be observed. 39. An estimated 1 million people living along the border lack basic water delivery and sewage disposal systems. 40. The main disadvantage of bacterial digestion in sewage disposal is that it is a very slow process.
