Our Solutions

1Technical Feasibility Studies

Every Anaerobic Biodigester project begins with a Technical Feasibility Study, which corresponds to:

• Survey and study of the availability of existing Biomasses;

• Collection and Biochemical analysis of existing Biomasses;

• Balance of existing Biomasses for Biogas generation;

• Estimate the production of Biogas and quantify the production of Methane;

• Estimate the production of methane, CO₂, electricity and heat;

• CAPEX estimate of the Plant.

2Biochemical analysis of Biomasses

Bromatological and Methanogenic Potential (BMP - Biochemical Methane Potential) analysis.

There are not many alternatives in Brazil for the biochemical analysis required for an Anaerobic Biodigester project, thus we have developed some partners that meet our needs.

We offer to our customers, this service of collection and laboratory analysis.

3Basic Technical Project

After the stage of technical feasibility study, it is necessary to dimension and design the basic installation of all the facilities of the Plant, as well as to size all the equipment and automation for the Anaerobic Digester.

This work includes Anaerobic Digester plants, pre-equalization tanks and plant feeders. Additionally, the plants, the design of the process flows, and other facilities.

Biogas or Biomethane application skids are also contemplated, such as desulfurization skids (H2S elimination), containers or CHP (Combined Heat and Power).

This is an early stage of the Executive Project for Building the Plant.

4Executive Project

The Plant Executive Project is developed based upon the Feasibility Study results and the Technical Project. All the guidelines, technical drawings, schedule and investment necessary for the construction of the Plant are included.

5Biodigester CSTR – Continuous-flow Stirred Tank Reactor

This reactor is also known as the Anaerobic Biodigester for Solids (European type).

CH4Solution can be contracted to build only the Anaerobic Biodigester. In this case, we do not participate in the biological efficiency calculations of the Plant and only execute the construction of the AD (Anaerobic Digestor) as specified.

Additionally, if requested, we evaluate the project presented.

Anaerobic Solids Digester, known as Biodigester European model, is designed to run on 12-19% dry matter or solids and made in concrete with thermal insulation, with temperature control for heating. It also can have cooling control, agitators and non-stop removable mixers, double-membrane cover canvas and complete robotization automation.

The automation and robotization solution can be accessed remotely through any Web interface device (PC, Tablet and Smartphone).

6Anaerobic Liquid Biodigesters (Asian or Canadian type)

CH4Solution can be contracted to build only the Anaerobic Liquid Biodigester of Lake model. In this case, we do not participate in the biological efficiency calculations of the Plant, we only executed the construction of the AD (Anaerobic Digester) as specified. Additionally, if requested, we evaluate the project presented. Anaerobic Liquid Digester, known as European Biodigester model, is designed to run on 6-10% of dry matter or solids. It is made dug in a geomembrane-lined soil, without thermal insulation. It may include temperature control for heating (which greatly increases the cost of the project in view of the inefficiency of ground installation), cannot have cooling control, stirrers or removable mixers, double or simple imported membrane cover and complete automation.

The automation solution can be accessed remotely through any Web interface support device (PC, Tablet and Smartphone).

7Liquid concentrating columns

Liquid biomass or even "wastewater" containing 0.5-8.0% of organic matter (to be evaluated case by case), when treated, can be used as organic matter to feed Biodigesters.

CH4Solution has its own solutions for concentration of these liquids for use in Biodigesters, or even for the reuse of waste water. These solutions require steam for operation.

The feasibility study of these Concentrator Columns depends on an analysis of how soluble the organic solids are in water and how much steam is required to concentrate this mixture. When a feasible scenario is found, we have an excellent application for the concentration of biomasses with high liquid content or reutilization of "industrial process waters"

8Equalization, Treatment and Decanting tanks

According to the mixture of biomasses which will feed the Biodigester, sometimes it may be necessary to:

• Equalize;

• Treatmen (pre-treatment, removal of sulphides);

• Homogenize;

• Remove undesirable solids (such as sand);

• Concentrate by decantation.

There is no single solution for all cases, each Biodigester project demands study and design of the optimal solution for the chosen application.

In our more than 200 Plants built, we have a series of solutions designed, installed and in operation. All alternatives must be tested and demonstrated to be economically feasible.

9Cleaning the Biogas Sulfuric Gas (elimination of H2S and H2O)

No matter what organic matter is used, one of the ever present and undesirable components of the Biogas will be the Hydrogen Sulphide (H₂S). Regardless of the pre-treatment of the organic matter or the internal treatment in the Biodigestor, some H2S will be present.

Hydrogen Sulphide (H₂S) is highly corrosive and in a matter of months will corrode piping, engines, compressors and other process equipment.

Our exclusive and unique process consists in water washing the biogas in a closed circuit.

The "Absorption Towers" processes used to eliminate H₂S by water, are widely used and consolidated in the chemical and petrochemical industry. Our exclusive process is an evolution of this technology.

The exclusive technology employed in this solution drastically reduces the investment (CAPEX) and results in a very competitive cost of operation (OPEX).

Features:

• Cold system with no use of thermal energy.

• No chemical additives.

• Simple and automated operating system.

10Biorefinery for Biomethane

Elimination of H2S, CO2 and purification of methane (CH4).

No matter what organic matter is used, one of the ever present and undesirable components of the Biogas will be the Hydrogen Sulphide (H₂S). Regardless of the pre-treatment of the organic matter or the internal treatment in the Biodigestor, some H2S will be present.

Hydrogen Sulphide (H₂S) is highly corrosive and in a matter of months will corrode piping, engines, compressors and other process equipment.

After elimination of H2S and CO2 and adequate compression, the CH4 resulting from our process is ready for use and no other process is required.

The quality of biomethane is regulated with different standards depending on each country.

Our processes are done by means of:

Absorption columns;

Wash Columns;

Equalization Tank;

Purification of Biomethane.

The exclusive technology employed in this solution drastically reduces the investment (CAPEX) and results in a very competitive cost of operation (OPEX).

Features:

• Cold system with no use of thermal energy;

• Chemical additives available on the market and not special;

• Generation of non-polluting waste gas;

• Biomethane with 97% purity, provided that the Nitrogen (N2) contained in the Biogas does not exceed 1%;

• In the previous conditions the H2O content in Biomethane will be at most 2%;

• Simple and automated operating system.

11Biorefinery plus BioCO2

No matter what organic matter is used, one of the ever present and undesirable components of the Biogas will be the Hydrogen Sulphide (H₂S). Regardless of the pre-treatment of the organic matter or the internal treatment in the Biodigestor, some H2S will be present.

Hydrogen Sulphide (H₂S) is highly corrosive and in a matter of months, will corrode piping, engines, compressors and other process equipment.

After elimination of H2S and suitable process, the CH4 and CO2 resulting from our process is ready to be used and no other process being required.

The quality of biomethane is regulated with different standards depending on each country.

Carbon dioxide (CO₂) is a liquefied, colourless, odourless, non-flammable and slightly acidic gas. CO₂ is heavier than air and is soluble in water. The CO₂ resulting from our process can be liquefied and thus sold to customers worldwide. It can also be supplied under pressure in steel cylinders or refrigerated in heat insulated containers.

Carbon dioxide is also widely used in a variety of industries, such as:

• food,

• grinding,

• welding,

• catering,

• metabolic mixtures,

• and expanded plastics.

The "Absorption Towers" processes used to eliminate H₂S by water, are widely used and consolidated in the chemical and petrochemical industry. Our exclusive process is an evolution of this technology.

Our processes are done by means of:

• Absorption columns;

• Wash Columns;

• Equalization Tank;

• Treatment Tank;

• Decantation tank;

• Filters;

• Purification of Biomethane;

• Purification of CO2.

The exclusive technology employed in this solution drastically reduces the investment (CAPEX) and results in a very competitive cost of operation (OPEX).

Features:

• Cold system with no use of thermal energy;

• Chemical additives available on the market and not special;

• Generation of non-polluting waste gas;

• Biomethane with 97% purity, provided that the Nitrogen (N2) contained in the Biogas does not exceed 1%;

• In the previous conditions the H2O content in Biomethane will be at most 2%;

• Simple and automated operating system.

12Turn-key solutions

According to the needs of our customers, we can offer turnkey solutions with guaranteed performance and complete plant delivery.

13Customized Energy Applications’ Solutions

According to the needs of our customers, we can offer turnkey solutions with guaranteed performance and delivery of the Plant with specific applications.

CH4Solution provides "Energy Application" solutions for biogas and biomethane, as follows:

• Replacement of LPG;

• Partial replacement of diesel fleet (hybrid solution);

• Replacement of the CNG (natural gas vehicles) fleet;

• Steam Saturated Generation with natural gas boilers;

• Combined generation of Electric and Thermal Energy (Saturated Steam and Water heated 90°C);

• CO2 production for industrial and food industry applications.