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Introduction

 

Geographical data

Population Uruguay: 3.48 million (2016)

The continental surface of the country is 176,215 km2 Unitary and centralized country, with some degree of territorial decentralization and services, subdivided into 19 departments and 112 municipalities. Annual cumulative rainfall varies between 1,100 and 1,600 mm. The average annual temperature is 17.5 ºC

Montevideo: 1.38 million and the surface is the 530 km2


Introduction

Montevideo, the smallest of the 19 political/administrative divisions of the Republic of Uruguay, concentrates most of the country's industries and service activities, and almost half of the country's population.

Main contamination sources are: solid waste disposal domestic sewage and industrial effluents.


     

       

Montevideo’s water courses network is composed by a large amount of surface water courses. The streams, Pantanoso and Miguelete and the Bay of Montevideo, are very important because they are closely linked to human activities. The high degree of contamination found in the city's water courses, originates mainly from the dumping of sewage and industrial effluent, and the indiscriminate disposal of solid wastes.


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Background. Objectives and Methodology

Background

Montevideo sanitation policy


Objectives

The main objectives of the City government programs and policies are directed towards:

  • Optimizing technical resources (public and private) and identifying weaknesses and strengths.
  • Reducing pollution loads contributed by Montevideo's industries.
  • Working in a holistic manner, with the continuous participation of the community.

We largely met the objectives, particularly in reducing pollution loads.

The Industrial Effluent Monitoring Program is complementary to the Program of Water Bodies and Environment and Education, the latter initiated in 1997.

A municipal regulation, the “Industrial Pollution Reduction Plan” (Resolution number 761/96), was carried out gradually thus allowing its adoption by small businesses that could not afford large investments in a short period of time.


Methodology

The companies responsible for 90% of Montevideo’s industrial pollution are identified according to their actual or potential contribution thus forming the Industrial Effluent Monitoring Program. These companies are located in the three geographical areas of Emisario-Carrasco, Miguelete-Bahia and Pantanoso-Santa Lucia.

Those businesses responsible for less than 10% of industrial pollution are monitored and controlled on an annual basis. Extracted samples are analyzed by the Quality Assessment and Environmental Control Service. The choice of controlled parameters is done in such a way as to include a common group (for all companies and types of discharge) and another group pointing to specific processes according to the branch of activity or requirements specific to the type of discharge.

Parameters analyzed:

  • Physicochemicals: pH, Sulphides, Solids
  • Organic matter: (BOD5, COD)
  • Oils and Fats
  • Nutrients: Ammonium, Total Phosphorus
  • Microbiological: Fecal Coliforms
  • Metals: Chromium, Lead, Cadmium, Copper

The Monitoring Program initially consisted of a group of industries that together made the greatest contribution to the degree of pollution of industrial origin within the Department. Three categories of priorities were initially established. According to the priority, the frequency of monitoring and control was established.

At present, annual evaluations of the industries that make up the Program are carried out. Depending on the results obtained, adjustments are made (inclusion or exclusion in the group) for the planning of inspections. These industries are distributed across 3 large areas corresponding to the main basins. Inspection planning is done every six months.

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Results Obtained

At the beginning of 2015, the Program was made up of a group of 93 companies, of which 80 were active.


Total flow and loads dumped

Comparison in recent years

Loading by place of discharge

By the end of 2015, the greatest contribution to industrial pollution (88%) was attributable to 23 companies, and their relationship to the total pollution loads was: 88% flow, 77% oils and fats, 88% BOD5, 97% Sulphides, 95% Chromium & 83% Lead.

Since the start of the Program, there has been a significant expansion of industries’ activities and to a lesser extent, of the industrial discharge flow.

Industrial restructuring, implementation of quality systems & environmental management, and monitoring & control together with civic monitoring have achieved important reductions in contamination loads.


Evolution of active industries

Evolution of flow

Evolution of organic matter

Evolution of fats and oils

Evolution of sulphides

Evolution of heavy metals

Synthesis of the Monitoring Program

Evolution since the beginning of the program:

  • Organic loading 

  • Heavy metals

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Results Obtained

Montevideo basins

Percent distribution of flows per basin

Percent distribution of oils and fats

Percentage distribution of organic matter

There is a growing public interest. Citizens’ participation has increased thanks to a well targeted campaign through social networks, a more visible complaint handling system online, and the establishment & training of environmental commissions comprised of experts, members of the public, and non profit organizations. The foregoing prompted improvements in the relationship between industries and the community. Said industries became more open in their relationship with the population, thus driving more and better information.


The implementation of the Program has also involved job creation (oriented towards supporting technical areas of environmental affairs): preparation of technical reports, works or reforms required, and others. 

Furthering these industrial effluent control efforts to recover watercourses and to improve the environmental quality for Montevideo and its inhabitants management system and public works plans were implemented for: construction of health infrastructure, rehabilitation of networks & interceptors, and elimination of uncontrolled discharges of waste & other pollutants into streams.


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Conclusions and Recommendations


The Industrial Effluent Monitoring Program is an innovative action for the city and its inhabitants, and has been very helpful as a tool for solving contamination problems in Montevideo.

The Program is an element that marks an improvement in terms of industrial waste treatments and water quality and could be used as a benchmark and a framework to resolve municipal problems in other areas and in other cities.

Likewise, the Program has had a positive overall impact that has challenged the traditional status quo in the city.

Given that the modality of work is based on the coordination and efficient use of resources (a priority for countries with economic shortfalls such as Uruguay’s), the Industrial Effluent Monitoring Program permits the creation of a foundation for new policies and management strategies and contributes to sustainability in departmental government management.

The Industrial Effluent Monitoring Program is an innovative action for the city and its inhabitants, and has been very helpful as a tool for solving contamination problems in Montevideo.

The Program is an element that marks an improvement in terms of industrial waste treatments and water quality and could be used as a benchmark and a framework to resolve municipal problems in other areas and in other cities.

Likewise, the Program has had a positive overall impact that has challenged the traditional status quo in the city.

Given that the modality of work is based on the coordination and efficient use of resources (a priority for countries with economic shortfalls such as Uruguay’s), the Industrial Effluent Monitoring Program permits the creation of a foundation for new policies and management strategies and contributes to sustainability in departmental government management.


Special thanks:

  • To the members of the Industrial Effluents Unit (Hernán Méndez, Mary Yafalián, Antuanet Calero), who have carried out the fieldwork and evaluation of the results.
  • To Eng. Martha Carámbula for her support.
  • To Agron.Eng. Ana Quintillán for her support.
  • To SIWI for their support, which made this participation possible.
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