• Document: Waste Water Treatment Technologies
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Waste Water Treatment Technologies Dr. Adalberto Noyola Robles M. en I. Liliana Romero Casallas **Dr. Juan Manuel Morgan Sagastume M. en I. Flor Hernández Padilla Dra. Patricia Güereca Hernández M. en C. Adba Musharrafie Martínez M. en C. Margarita Cisneros Ortiz M. en C. Alejandro Padilla Rivera Introduction • Objectives • Data acquisition General results • Most used technologies • Most used Waste water flows (WW) • Regulation General scenarios Conclusions For the LAC region this study: • identifies the most representative Waste Water Technologies (WWT) • defines the most representative wastewater flows • presents WW laws and regulations • estimates GHG emissions produced by WW  Collection of information by national researchers in 6 Countries. Review documentary information published by agencies, organizations and utilities.  Inventory information for a sample of WWTP / country, according to: - Categorization of cities by population size. - Survey items : a) General application b) Specific applications - Wastewater quality -Sludge, biosolids and solid wastes - Emission and odor control - Costs c) Validation on the field of information Brazil and Mexico are countries at intermediate stage of development, with medium coverage (PAHO,2001), that by dimension is advisable to analyze independently of smaller countries. For the Andean Countries (Bolivia, Colombia, Ecuador, Peru and Venezuela) Colombia was selected to represent this area, this because represents the country with the greatest sanitation coverage (83%), Southern cone region (Paraguay, Chile, Argentina y Uruguay), Chile was selected because it has the highest treatment coverage in the area (93%). Guatemala and Dominican Republic were selected to represent de Caribbean and Central America areas. This because both countries have high coverage compared to other countries. Additionally, Guatemala was selected for its high vulnerability to climate change (Maplecroft, 2009) Criteria for selection of WWPs: • The location of the WWTP's (county, state, according to the country's political division ), • Type of secondary treatment • Population served, • Capacity of the WWTP (l/s), • Final disposal of treated water. THE MOST USED TECHNOLOGIES IN LAC WWTP capacities related to population size 700 650 600 550 500 450 No. de PTAR 400 350 300 250 200 150 100 50 0 Chica (2,000 -9,999 hab) Pequeña (10,000 - 99,999 hab) Intermedia (100,000-999,999 Grande hab) (> 1 milón hab). Q1: 0.1-25 l/s Q2: 25.1-250 l/s Q3: 251-2500 l/s Q4: >2501 l/s To relate the type of city with the installed capacity of the WWTP it was multiplied the population size of each type of city by the assumed water endowment ( 235 l/day per capita with 85% of wastewater generation) ( Spellman, 1999). Brazil: 854 1400 1246 Chile: 178 1200 Colombia: 141 1000 Guatemala:43 800 750 Dominican Republic: 33 495 Mexico: 1684 No. Technologies 600

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