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ENERGY COMPARISON

 

Why use nopal ?.

 

The cactus has excellent molecular characteristics which allows to deliver a large amount of biogas in a very short time, in comparative terms for the same volume of biogas nopal degrades 5-10 times faster than animal manure, it allows a single computer is 5 to 10 times more productive. Also it not produces hydrogen sulfide which when burned in contact with air becomes sulfur oxides.

 

What is the yield per hectare?

 

Cactus is an extraordinary plant with a modern irrigation, two or three crops per year, can deliver continuously from 800 to 1,200 tons of biomass / year, in terms of energy equivalent to 35 kw / ha x 24 hx 365 days.

 

What is the cost of a standard project?

 

Assuming there is water and the land is suitable for development of nopal. For a project of 1 MW has cost some US1.500.000 including plantations, equipment, etc. facilities assessment, the payback assuming a value of power sale dollars US80 / MWh would be within 2 years. 

 

 

Table biogas energy compared with cactus

 

Product

Sell / Unid

Density kg./l

Calorific Power Kcal. / kg.

1 m3 of biogas  equals to:

Coal

Kg.

 

7.000

1.25 kg.

Charcoal

Kg.

 

7.000

1.25 kg.

Diesel oil

 Litro

0,84

10.900

0.80 l

Benzine

Litro

0,73

11.200

0.78 l

Paraffin

Litro

0,81

11.100

0.79 l

Liquiefied gas

kg.

0,55

12.100

0.73 kg.

Firewood

kg.

 

3.500

2.5 kg.

City gas

m3

 

9.600

0.92 m3

 

 

 

 

 

 

Advantages of cactus

 

  • Continuous power generation 24 X 365 days.

  • Production of biogas and electricity.

  • No sulfur oxides or particulate.

  • Low maintenance.

  • Overall plant efficiency 80-90%

  • Generates soil, organic fertilizers.

  • Change the microclimate retaining water in the soil.

  • Extracts carbon dioxide atmosphere.

  • Lifespan 20 years.

  • Allows the sale of carbon credits.

  • Totally organic process

  • Fast implementation of project

  • Generates permanent jobs for sowing harvest, and process plants.

  • Allows the opening of new markets to be considered a green company that cares.

 

 

 

 

 

 

 

 

 

 

 

 

 

Equivalent power

CROP

Efficiency

Fuel

Energy

Energy

Relative Energy Efficiency

( L/hect-year )

 

( Mcal/hect-year)

Kcal

Base: Nopal

Nopal (Opuntia)*

52.000 (*)

Biogas (*)

364.000

7.000 kcal / M3

100%

Palm

5.550

Biodiesel

51.393

9,260 Kcal / L

14%

Cocotero

4.200

Biodiesel

38.892

9.260 Kcal / L

11%

Higuerilla

2.600

Biodiesel

24.076

9.260 Kcal / L

7%

Avocado

2.460

Biodiesel

22.780

9.260 Kcal / L

6%

Jatropha

1.559

Biodiesel

14.436

9.260 Kcal / L

4%

Rape

1.100

Biodiesel

10.186

9.260 Kcal / L

3%

Soy

840

Biodiesel

7.778

9.260 Kcal / L

2%

Sugar cane

9.000

Bioethanol

45.000

5.000 Kcal /L

12%

Beet

5.000

Bioethanol

25.000

5.000 Kcal /L

7%

Yucca

4.500

Bioethanol

22.500

5.000 Kcal /L

6%

sweet sorghum

4.400

Bioethanol

22.000

5.000 Kcal /L

6%

Corn

3.200

Bioethanol

16.000

5.000 Kcal /L

4%

 (*) (M3 biogs/hect/ao)

 

 

 

 

 

 

 

Comparative nopal, wind and photovoltaic energy

Feature

Nopal energy

Wind energy

Photovoltaic energy

Availability

Continuous 24 X 365 days

Irregular depending on the time of the day.

Irregular depending on the time of the day.

Maintenance

Under the conditions of operation, every two years painting. Shortage of personnel

Bass, very few staff in normal conditions

Bass, very few staff in normal conditions

Fault maintenance

Fast, low -cost. Average staff

Highly qualified with major failures, slow and costly repairs.

Highly qualified with major failures, slow and costly repairs.

Type of generated energy

Electric, biogas, thermal (hot water)

Electric

Electric

Power generation efficiency

80-90 %

30% of the installed capacity in land.

10-20% depending on the cost of cell

Duration of equipment and installations

15-20 years

20 years

10 years

Environmental benefit

It generates soil, organic fertilizers. Change the microclimate to retain water the soil. Remove carbon dioxide from the atmosphere. It allows the sale of carbon credits. Completely organic process

It does not emit carbon dioxide. Neutral effect on the environment.

It does not generate carbon dioxide.

Environmental damage

Unknown

High-impact on migratory routes of birds, noisy energy production because of the blades to the rotal.

Construction of cells and batteries is highly polluting

Availability of spare parts

Available in domestic market immediately.

They must be imported

They must be imported with the importer and distributor unit.

Time of study and implementation of project

Short, 1 year

Long, 8 years minimum to study winds

Short 1 year.

Social benefit

Generates permanent jobs for planting, harvest and process plants.

It generates jobs in the mounting of equipment.

It requires little maintenance and personnel. Applicable to small scale in marginal sectors.

Positive externalities Culturally the cultivation of the nopal is accepted and promoted by institutions of the State. Allow the opening of new markets being considered to be a green company that cares for the environment. Known and implemented on a global basis technology Attractive and widely known technology, widely positive image for their implementation.
Negative externalities

Few built plants in the world, unknown.

The money comes from the country to the factories in Europe mainly. The money is not invested in local human and   technological resources

The batteries generate polluting toxic. The teams are fragile to impacts and damage. The money is not invested in local human and technological resources.
Installation installed KWh cost US1400 / KW not include income for by-products US2.500/KW US2.500 /KW
Return on investment 1 to 2 years 5-8 years 12-15 years

 

 

Comparative table of biogas processes of nopal v/s manure of pork and cow

 

 

Nopal / cactus

Pork and cowg

Raw material

Nopal cultivated, nourished and developed for high production of biomass

Dung, waste product

Applications

As food for livestock, human, energy production

As an organic fertilizer, energy generator

Holding time

8 - 24 hours

15-20 days

Process temperature

37C, temperature controlled

Environment 5 - 30 C, no temperature control

Energy

5% energy consumption delivered in the process, the heat is delivered by hot water cooling system of electric generators,

The energy required may be greater than that generated by the system. The heat is delivered by hot water from the cooling system of electric generators,

Facilities

The production of 1 MW electric requires 1 reactor of 1300 m3

The production of 1 MW electric requires the installation of 15 reactors of 1300 m3

Heating

Electric generators generate more than 200% of the required process heat. Only one fraction is used for reactor heating

Heat is delivered by hot water from the cooling system of electric generators, but is insufficient to maintain a steady mesophyte temperature. It will require 15 times more hot water to heat 15 reactors and produce the same energy

materials

Carbon steel is used, nopal produces no hydrogen sulfide, equipment using natural gas is suitable.

Stainless steel must be used throughout the process line in contact with biogas, biodigesters, blower purifiers, electric generator

Waste

Approximately 1% of the nopal is not processed, which contains lignin or fibers digestible by bacteria, 99% is water or biomass that is transformed into water with nitrogen, nutrients and Biogas usable. This effluent has no odor and is used in plantations, recycled

The material digested by the bacteria depends on the feeding of the animals and their composition.

Production capacity

The elastic process can be regulated from u 10% to 100% of installed capacity. The production is adjusted by reactor feed, if more energy is required, more nopal is cut and feed reactors, no accumulation of material, the nopal remains in plantations until it needs to be cut.

The process is adjusted to the amount of animals and excreta that are generated daily, the accumulation of excreta generates environmental problems, so that everything produced must be processed. You can not increase or decrease the amount of animals daily. It is a more rigid process.

Digestor

They are specific for nopal considering their rheological characteristics and composition of biogas, bacterial catalysts and building materials

Usually they are designed for diverse manure of cow and pork are the most usual, there are multiple design according to the characteristics of the zones and especially process temperatures.

 

 

 

 

 

 

 

Padre Mariano 391 of 704, Providencia. Santiago, Chile, Phone : 569 9087 9728

 

Email: contact@elquiglobalenergy.com www.elquiglobalenergy.com