1. Using a biodigesters as a pre water treatment

2. SUSTAINABLE RURAL DEVELOPMENT PROYECT
Funding from the World Bank credit (100 million USD in two stages) and GEF (USD 10 million) donation.
Promote the use of renewable energy and energy efficiency in the agricultural sector.
Promotion of the competitiveness of agricultural activities.
Reducing the impact of agriculture on the environment (water, air and soil)

3. FIRCO PROMOUTING AGRIBUSSINES
AGRI-BUSINESS (Agriculture, livestock, aquaculture, fisheries and agro-industry)
Vision:
By using and investing in renewable energy are economically sustainable.

4. FIRCO´S SUPPORTED TECHNOLOGIES
Biomass utilization
Anaerobic Digesters
Gasification
Biogas and syngas use
Electric generators
Turbines
Photovoltaic
Solar photovoltaic off the grid
Solar photovoltaic conected to the grid
Solar heaters
Evacuated tube solar collectors
Concentrating solar systems
Flat-plate solar collectors
Energy efficiency
High-efficiency heating
Advanced electric motor drives
Efficient lighting

5. BENEFITS OF USING BIODIGESTERS
Environment
Reducing greenhouse gas emissions
Reducing water pollution
Use of by-products
Improvement of the habitat
Energy
Generate electricity by using biogas
Reducing de use of fossil fuel
Economic
Reducing and sometimes avoided cost of electricity
Avoided cost of electricity
Reduction of the payment of duties and fines by digester discharges
Social
Employment generation
Producers and workers training
Minimize odors and pathogens

6. BENEFITS OF USING BIODIGESTERS
Swine wastewater and its treatment characterization.
Waste water from pig farms is a high variation in the concentration of pollutants.
The use of anaerobic digesters of liquids and solids with high hydraulic retention times, greatly improved the treatment of effluents from pig farms.
↓ 96.4%
Chemical Oxygen Demand COD
Total Suspended solids TSS
Biochemical Oxygen Demand BOD
COD
TSS
BOD

7. GEOGRAPHICAL COVERAGE
More than 100
From 50 to 99
From 10 to 49
From 1 to 9
Agricultural production areas
Important correlation between States with greater number of bio-digesters and the areas of hog farms and dairy farms.
High correlation with areas of agricultural production.

8. MEXICAN REGULATORY FRAMEWORK
NOM-001-ECOL-1996
Maximum permissible limits of pollutants in discharges of wastewater into water and national property
NOM-002-SEMARNAT-1996
Maximum permissible limits of pollutants in discharges of wastewater to urban or municipal sewage systems
NOM-003-SEMARNAT-1997
Maximum permissible limits of pollutants for treated wastewater that is reusen on services to the public
NOM-004-SEMARNAT-2002
Sludge and biosolids, specifications and maximum permissible limits of pollutants for its use and disposal
Laws
Federal rights
National waters
General ecological balance and environmental protection

9. MAXIMUN PERMISSIBLE LIMITS FOR BASIC CONTEMINANTS FOR AGRICULTURAL USE
Parameters
Rivers
Natural and artificial reservoirs
Soil
Temperatura °C
N.A 40
N.A.
Fats and oils 25
Floating matter
absent
Settleable solids (ml/l) 2
Total suspended solids
200
125
Biochemical oxygen demand
150
Total Nitrogen 60
Total phosphorus 30
(NOM-001-ECOL-1996, daily average)
(milligrams per litre, except where specified)

10. SWINE BIODIGESTER Biochemical oxygen demand reduction (mg/l)
Average reduction 51.9%
(6.3% – 92.7%)
Physico-chemical characterization of effluents from bio-digesters, PDRS.

11. SWINE BIODIGESTER Total suspended solids reduction (mg/l)
Average reduction 73.9%
(8.7% – 99.7%)
Physico-chemical characterization of effluents from bio-digesters, PDRS.

12. DAIRY CATTLE BIODIGESTER
Biochemical oxygen demand reduction (mg/l)
Average reduction 52.7%
(12.2% – 88.2%)
Physico-chemical characterization of effluents from bio-digesters, PDRS.

13. DARY CATLLE BIODIGESTER
Total suspended solids reduction (mg/l)
Average reduction 79.3%
(22.6% – 94.9%)
Physico-chemical characterization of effluents from bio-digesters, PDRS.

14. Natural and artificial reservoirs
MAXIMUM PERMISSIBLE LIMITS FOR HEAVY METALS AND CYANIDES FOR AGRICULTURAL USE
Parameters
Rivers
Natural and artificial reservoirs
Soil
Arsenic
0.4
Cadmium
0.1
Cyanides
3.0
Copper
6.0
Chrome
1.5
1.0
Mercury
0.02
0.01
Níckel 4
Lead 1 10
Cinc 20
(NOM-001-ECOL-1996, daily average)
(milligrams per litre)

15. SWINE AND DAIRY CASSTLE BIODIGESTER
HEAVY METAL AND CYANIDE REDUCTION (mg/l)
Physico-chemical characterization of effluents from bio-digester systems, PDRS.

16. IMPACTS OF THE MANAGEMENT OF BIO-DIGESTERS TYPE
Anaerobic Biodigester Technology in Methane Capture and Manure Management in Mexico, The History and
Current Situation, United State Agency for International Development.

17. IRRIGATION WHIT EFFLUENT
Irrigation with effluent
The effluent of bio-digesters is prohibited for irrigation of vegetables and other crops of short stem.
Practically 100% of the effluent of bio-digesters for agricultural irrigation is used in the livestock production units.

18. USING EFFLUENTS BENEFITS
yield

19. CONCLUSIONS Mexico has experience in swine and dairy biodigesters
FIRCO´s main goal it is implementing biodigesters for renewable energy, however, this technology has a collateral benefits, such as pre water treatment.
It´s necessary a good biodigesters management in order to improve the water quality.
Effluents may used for long stem crops and pastures.
For delivering effluents to rivers and artificial ponds, it is necessary have a second water treatment.

20. Thank you Octavio Montufar Management Coordinator
Sustainable Rural Development Project