EPDM membranes help contribute to a plant meeting regulation for no contaminants in wastewater effluent in Morelos, Mexico.

Project Information

Location: Morelos, Mexico
Project Type: Municipal Wastewater Treatment
Completion Date: July 2011
Treatment Objectives:
Design Flow: 1.7 MGD
Effluent Objectives: No Contaminants

System Variables

Wastewater Type: Municipal
Actual Estimated Population: 21,600 people
Rate: 150 L/person
Flow: *Daily Maximum of 30.0 lps
*Hourly Maximum of 75.6 lps

Influent Water Conditions

Biochemical Water Oxygen Demand (BOD) 5: 300 mg/L
Total Suspended Solids (TSS): 250 mg/L

Effluent Water Conditions

Biochemical Water Oxygen Demand (BOD) 5: 20 mg/L
Total Suspended Solids (TSS): 20 mg/L

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Project Background & Challenges

The Municipality of Emiliano Zapata in the state of Morelos, Mexico, located 60 miles south of Mexico City, is on an area of great hydrological affluence. Zapata Municipality required a wastewater treatment plant (WWTP) to reduce pollution of the hydrological resources of the region. The city hired HidroIndustrial, S.A. de C.V. to build a wastewater treatment plant with a capacity to treat 30 liters per second (0.7 MGD) of wastewater and provide an effluent with no contaminants for public services or human contact, according to Mexican regulation.

The EDI Answer

To achieve such a system, HidroIndustrial, S.A. de C.V. contracted with Environmental Dynamics International (EDI) for help with the project. EDI worked within their parameters and provided the aeration system for the activated sludge plant.

EDI’s Curvilinear Panel fixed-grid system called for EPDM membranes with a 1.25 x 1.25mm perforation. This system design allows for a simple installation and maintenance of the aeration equipment.

The system’s capabilities met all project requirements, thus being a reliable, trustworthy, robust system.

Upgraded System Electricity Usage

HidroIndustrial, S.A. de C.V. saved both time and money due to the easy installation of EDI’s aeration system. Zapata Municipality received an efficient system that was reliable and robust to perform the desired treatment with low maintenance issues. The WWTP performed the desired objectives and achieved an effluent under Mexican regulations.


“No installation problem was found [with EDI’s products,]” M. Medrano, Project Director said. “All went fine because of the ease of the installation, and all the support given [by EDI].”