Sewer: Sewage Treatment and Septic Tanks

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Drainage and Sewerage System for the Municipality of Kabute

You are part of the team planning for the drainage and sanitation/sewerage system of the Municipality of Kabute.

The present number of inhabitants of Kabute is about 320,000. An increase is expected at a rate of 2.5% annually at least for a period of 10 years to come. After that a certain leveling off must be realized. A map of the municipality is presented in Annex 1.

The map indicates the presently sewered zones of the municipality A and Band the places where they discharge into the sea and the harbor. The neighborhoods have been named A, B, C, etc.

These sewer discharge the wastewater of about 45,000 inhabitants plus sewage from public and commercial
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|Neighborhood |Inhabitants |Connected to sewers |
|A |30,000 |15,000 |
|B |45,000 |30,000 |
|C |35,000 |nil |
|D |190,000 |nil |
|E |20,000 |nil |

1. How would you deal with the problem of pollution of the beaches of municipality of Kabute? What effects do you expect from indiscriminate discharge of raw sewage?
2. Indicate the locations of future sewage treatment stations. Give your arguments justifying the location or locations.
3. Given the chance and resources, which type of
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