Technical Standards for the Design and Construction of Bio ...

March 2010

Technical Standards for the Design and Construction of

Bio-Digesters in Mexico

INDEX

Contents

1. Introduction

2. Objective

3. Conditions where Standards Apply

4. References

5. Definitions

6. Classification

7. Standards

7.1 Bio-Digester Dimensioning

7.1.1 Determining Biomass

7.1.2 Determining Volumetric Flow of Influents

7.1.3 Physical, Chemical and Biological Characteristics of Influents

7.1.4 Geographical Factors

7.1.5 Determination of Hydraulic Retention Times

7.1.6 Bio-Digester Volume

7.1.7 Calculating the Production of Biogas

7.2 Bio-Digester Construction

7.2.1 Location

7.2.2 Separation of Solids

7.2.3 Mixing Tank

7.2.4 Bio-Digester Construction

7.2.5 Pipeline Systems

7.2.6 Mixing System

7.2.7 Sampling Points

7.2.8 Installation of the Geomembrane

7.2.9 Biogas Meters

7.2.10 Filter for the Retention of Hydrogen Sulphide

7.2.11 Biogas Burner

7.2.12 Electrical Installations

7.2.13 Effluents

7.3 Safety Measures

7.3.1 Restriction of Access

7.3.2 Perimeter Fence

7.3.3 Location of the Burner

7.3.4 Safety Notices and Warning Signs

7.3.5 Safety in the Pipeline Systems

7.3.6 Installation of Safety Valves

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7.3.7 Prevention and Control of Fire Hazards

7.3.8 Equipment for Personal Safety and Protection

7.3.9 Secure Engine Room for the Electric Power Plant

7.3.10 Motor-Generators

7.4 Maintenance

7.5 Required Information for the Receipt of Projects

7.5.1 Executive Projects

7.5.2 Manuals

7.5.3 Protocols for Testing Equipment Safety and Quality

7.5.4 Materials, Equipment and System Guarantees

7.5.5 Presentation of Quotes

7.5.6 Technical Support Services

8. Appendices

9. Bibliography

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Participating Organisations

This Technical Standards were sponsored by The United States Environmental

Protection Agency

The following organisations participated in the elaboration of these standards:

Governmental Institutions

Secretar¨ªa de Medio Ambiente y Recursos Naturales (SEMARNAT)

Direcci¨®n General del Sector Primario y Recursos Naturales Renovables

Direcci¨®n de Regulaci¨®n Ambiental Agropecuaria

Secretar¨ªa de Agricultura, Ganader¨ªa, Desarrollo Rural, Pesca y Alimentaci¨®n

Fideicomiso de Riesgo Compartido

Supply companies participating in meetings

Armando Rodr¨ªguez S¨¢nchez; Asociaci¨®n Mexicana de Biomasa y Biog¨¢s;

Biogeneradores de M¨¦xico; Centro de Transformaci¨®n Org¨¢nica, S.P.R de R.L;

Constructora de Mecanismo de Desarrollo Limpio, S.A de C.V; Construliner, S.A;

Construtek Edificios Prefabricados, S.A de C.V; Environmental Fabrics de M¨¦xico, S.

de R.L de C.V; Equipamientos y Suministros Industriales, S.A de C.V; Geo-Productos

Mexicanos, S.A de C.V; Geo Proyectos y Dise?os Ambientales, S.A de C.V; JIDOKA.

Avalon Inmobiliaria; Manofacturas y Mantenimiento Industrial S¨¢nchez; Materiales

Geosint¨¦ticos VASE; Microturbinas de Eco Generaci¨®n, S.A de C.V; MOPESA

Motores Power, S.A; M y S Biodigestores; INTERSISA; Plastic-Liners, S.A de C.V;

Proyectos Estructuras y Construcciones Civiles, S.A de C.V; Sarlo de M¨¦xico, S.A de

C.V; Servicios Ambientales y de Energ¨ªas Renovables del Centro, S.A de C.V;

Suministros y Mantenimiento Avipecuario.

Special thanks to the following companies for their technical contributions to

these Standards:

1.

2.

3.

4.

5.

6.

7.

8.

Servicios Ambientales y de Energ¨ªas Renovables del Centro, S.A de C.V

Environmental Fabrics de M¨¦xico, S.de R.L de C.V

Constructora de Mecanismo de Desarrollo Limpio, S.A de C.V

Geo Proyectos y Dise?os Ambientales, S.A de C.V

Equipamientos y Suministros Industriales, S.A de C.V

Biogeneradores de M¨¦xico

Plastic-Liners, S.A de C.V

MOPESA Motores Power, S.A

Technical Standards for the Design and Construction of Bio-Digesters in Mexico. Final Draft

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1. Introduction

These ¡°Technical Standards¡± have been created to ensure the quality, durability,

safety and performance in the design, construction, operation and maintenance of

anaerobic covered lagoon digesters, which are designed to treat organic waste and

manure from pig and dairy farms across the country, and in so doing, take advantage

of the biogas produced in order to generate electrical or thermal energy, or simply

neutralise it by burning it directly.

In both instances, we are contributing to the reduction of the environmental impact

associated with this kind of activity.

2. Objective

These ¡°Technical Standards¡± establish guidelines and criteria for the design,

materials, construction, operation and maintenance, as well as safety, of anaerobic

covered lagoon bio-digesters and their associated installations for energy use,

developed and distributed in Mexico.

3. Conditions where Standards Apply

These ¡°Technical Standards¡± apply to anaerobic covered lagoon bio-digesters which

treat organic waste and manure from pig and dairy farms, as well as their installations

for exploiting the biogas produced in order to generate electricity.

Although the current document is concerned with covered lagoon digester

technology, given the interest manifested by companies offering other types of

technology (modular and concrete, among others), we suggest that in the short term

these companies be subject to the generic standards established in this document,

and that in the medium term, similar documents will be developed to deal specifically

with each technology type.

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