(1)Simple screening out of solids -this is a prerequisite to all subsequent means of disposal, (2)Filtration through gravel beds (3)Pumping into settling tanks, followed by treatment with biological agents (4)Aeration and lagooning: (5)Spray irrigation (6)Discharge into a Public sewer, after one or other of the above treatments-this will invariably involve a charge for the volume accepted by the Local Authority; (7)Discharge into a tidal or other waterway, after whatever treatment prescribed by the River board Solid wastes can sometimes be dried for animal foods but the operating cost of this procedure must be carefully examined to ensure that it is a viable operation The only satisfactory approach to this major problem is to engage the services of an effluent consultant at the outset of the project, and the expert is likely to fulfil the local requirements very much more economically than the dehydrator would do, as the latter invariably enters this field with less than expert knowledg Contour irrigation, Central Turkey Wasteful control but low Overhead irrigation, Central Turkey High capital cost-efficient water distribution. Preparing landor(1) Simple screening out of solids - this is a prerequisite to all subsequent means of disposal; (2) Filtration through gravel beds: (3) Pumping into settling tanks, followed by treatment with (4) Aeration and lagooning; (5) Spray irrigation; (6) Discharge into a public sewer, after one or other of the above biological agents; treatments - this will invariably involve a charge for the volume accepted by the Local Authority; (7) Discharge into a tidal or other waterway, after whatever treatment is prescribed by the River Board. Solid wastes can sometimes be dried for animal foods but the operating cost of this procedure must be carefully examined to ensure that it is a viable operation. The only satisfactory approach to this major problem is to engage the services of an effluent consultant at the outset of the project, and the expert is likely to fulfil the local requirements very much mo- economically than the dehydrator would do, as the latter invariably enters this field with less than expert knowledge. Contour irrigutiw Central Turkey - - rc ,;- Wasteful control but low capital cost 37