1. Waste Water Treatment in Costa Rica Harold Steinvorth

2. Ley General de Salud (1973) Ley de Vida Silvestre (1992) Legislation

3. Ley General de Salud: Demands Waste Water Treatment Demands an approval from the Ministerio de Salud. Close the establishments that infringe the law.

4. Legislation Ley de Vida Silvestre: Forbids to contaminate any body of water. BOD and Total suspended solids must not exceed 50 mg/l.

5. Screen Bars

6. Hidrostatic Filters

7. Sandtraps

8. Grease Traps

9. Floculation

10. B CAJA DE REJAS Y AFORO Bar screen Sludge dryers Habitaciones Lixiviados Sludge water Fertilizer CAMPO DE INFILTRACION Wetland WWT (sand filter) SEDIMENTADOR PRIMARIO Y DIGESTOR Primary settler Anaerobic Filter sludge Pumping Station Waste Water wash SD CD SD Restaurante Grease Traps SIFONES DOSIFICA- DORES CAJA DE DISTRIBUCION Distribution manhole Waste Water Treatment System

11. Anaerobic lagoons

12. Waste Water Treatment System B B CLORATE CAJA DE ENTRADA watering Drying chambers Sludge Recirculation Apts. Industrial Zone Hotel Lixiviados Fertilizer AREAS VERDES B B B Airation Tanks (3) Settling Chambers Aerobic Digestor Overflow purge Sludge blowers Air Treated water Cl 2 Cleaning purge B

13. Aerobic Treatment Water Inlet Airation tanks

14. Air Difuser Blowers

15. Treated water usage Treated water storage Reactores Aeróbicos Lodos Activados de Aeración Extendida

16. Usage Verted in a river Watering Other (cooling systems, service water… etc)