Biogas Upgrading System  Biogas is a renewable energy source and mostly produced from anaerobic digestion (AD). Biogas composition varies with the biomass digested and contains mainly methane (CH4) and carbon dioxide (CO2), as well as traces of hydrogen sulfide (H2S), ammonia (NH3), hydrogen (H2), nitrogen (N2), carbon monoxide (CO), oxygen (O2). Membrane technology as purification process is a relatively recent but very promising technology. Also, hybrid processes where membranes are combined with other processes are believed to have lower investment and operation costs compared with other processes. Product Paramenters Biogas Upgrading System Specification Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 96% Mode to utilize Biomethane: CNG or Gas Network Unit Energy Consumption: 0.15-0.25 Kwh/Nm³ Methane Operating Pressure: Medium or Low Pressure, 5-10 or 10-20 Bar (According to the product configuration) Environmental Benefits: Minimum Greenhouse Gas Emissions System Composition Introduction of Membrane Technology Membrane Technology For the Membrane we choose EVONIK as our partner and membrane supplier. Their membrane upgrading process with SEPURAN® Green delivers a constant high biomethane grade with more than 99% purity. In other words, almost all the methane is recovered in bio natural gas quality. Evonik has developed a biogas upgrading process that makes best use of the membranes' separation properties: Through skillful connection of SEPURAN® Green membranes it is possible to obtain methane with a purity level of up to 99% from the crude gas. Just one compressor is needed. Polymide Membrane SEPURAN® Green membranes have the highest CO2/CH4 selectivity and are therefore a superior technology for upgrading biogas. This selectivity of the membranes enables the production of high purity biomethane with superior methane recovery. This distinguishes the Evonik membranes from other membranes that are available.   BENEFITS OF SEPURAN® GREEN MEMBRANE TECHNOLOGY * Reduced operating costs * Low Investment * Easy to operate * Low space requirement and short installation times * Flexible and modular Installation * No chemicals required * No additional drying stage Typical Configurations ● Three Stage Membrane Process — Medium Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 99% Mode to utilize Biomethane: CNG or Gas Network Unit Energy Consumption: 0.25-0.25 Kwh/Nm³ Methane Operating Pressure: Medium Pressure, 10-20 Bar Environmental Benefits: Minimum Greenhouse Gas Emissions ● Two Stage Membrane Process — Medium Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 97% Mode to utilize Biomethane: CNG Unit Energy Consumption: 0.25-0.25 Kwh/Nm³ Methane Operating Pressure: Medium Pressure, 10-20 Bar Environmental Benefits: Lower Greenhouse Gas Emissions ● Two Stage Membrane Process — Low Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 96% Mode to utilize Biomethane: Gas Network Unit Energy Consumption: 0.15-0.20 Kwh/Nm³ Methane Operating Pressure: Low Pressure, 5-10 Bar Environmental Benefits: Lower Greenhouse Gas Emissions Pictures

Detailed Product Description Material: Glass-Fused-To-Steel Service Year: 30 Years Holiday Test: Up To 1500V Type: Bolted Steel Tank High Light: biogas purification equipment, h2s removal system Chemical desulfurization system/ H2S purification/ Plug and useWhy we need desulphurizationRemoval of H2S is often required for reasons of health, safety, environment and corrosion of equipment such as gas engines, boilers and piping. Desulphurization is also is necessary when biogas is upgraded to natural gas quality and injected in the grid.Benefits WIth YHR Chemical desulphurization Professional team Experienced in biogas industry Low investment Plug and use, no conmissioning time needed

Biogas Upgrading System  Biogas is a renewable energy source and mostly produced from anaerobic digestion (AD). Biogas composition varies with the biomass digested and contains mainly methane (CH4) and carbon dioxide (CO2), as well as traces of hydrogen sulfide (H2S), ammonia (NH3), hydrogen (H2), nitrogen (N2), carbon monoxide (CO), oxygen (O2). Membrane technology as purification process is a relatively recent but very promising technology. Also, hybrid processes where membranes are combined with other processes are believed to have lower investment and operation costs compared with other processes. Product Paramenters Biogas Upgrading System Specification Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 96% Mode to utilize Biomethane: CNG or Gas Network Unit Energy Consumption: 0.15-0.25 Kwh/Nm³ Methane Operating Pressure: Medium or Low Pressure, 5-10 or 10-20 Bar (According to the product configuration) Environmental Benefits: Minimum Greenhouse Gas Emissions System Composition Introduction of Membrane Technology Membrane Technology For the Membrane we choose EVONIK as our partner and membrane supplier. Their membrane upgrading process with SEPURAN® Green delivers a constant high biomethane grade with more than 99% purity. In other words, almost all the methane is recovered in bio natural gas quality. Evonik has developed a biogas upgrading process that makes best use of the membranes' separation properties: Through skillful connection of SEPURAN® Green membranes it is possible to obtain methane with a purity level of up to 99% from the crude gas. Just one compressor is needed. Polymide Membrane SEPURAN® Green membranes have the highest CO2/CH4 selectivity and are therefore a superior technology for upgrading biogas. This selectivity of the membranes enables the production of high purity biomethane with superior methane recovery. This distinguishes the Evonik membranes from other membranes that are available.   BENEFITS OF SEPURAN® GREEN MEMBRANE TECHNOLOGY * Reduced operating costs * Low Investment * Easy to operate * Low space requirement and short installation times * Flexible and modular Installation * No chemicals required * No additional drying stage Typical Configurations ● Three Stage Membrane Process — Medium Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 99% Mode to utilize Biomethane: CNG or Gas Network Unit Energy Consumption: 0.25-0.25 Kwh/Nm³ Methane Operating Pressure: Medium Pressure, 10-20 Bar Environmental Benefits: Minimum Greenhouse Gas Emissions ● Two Stage Membrane Process — Medium Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 97% Mode to utilize Biomethane: CNG Unit Energy Consumption: 0.25-0.25 Kwh/Nm³ Methane Operating Pressure: Medium Pressure, 10-20 Bar Environmental Benefits: Lower Greenhouse Gas Emissions ● Two Stage Membrane Process — Low Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 96% Mode to utilize Biomethane: Gas Network Unit Energy Consumption: 0.15-0.20 Kwh/Nm³ Methane Operating Pressure: Low Pressure, 5-10 Bar Environmental Benefits: Lower Greenhouse Gas Emissions Pictures

1. Introduction Another option of Bolted Tank, Stainless Steel tank Technology, YHR could offer Stainless Steel 304,316 Bolted Tank for selected application to meet various project requirement. With a wide range of storage capacity and particular configuration, YHR Bolted Stainless steel Tank has widely application in leachate treatment and food processing industry. We also have Stainless Steel Silo for dry bulk storage 2. Certification & Capabilities NFPA 22 OHSA PT 1910 ISO 9001:2015 NSF/ANSI 61 3. Advantage 01. Superior anti-corrosion performance 02. Durability: Stainless Steel Material remains ductile at all temperatures and naturally resistant to corrosion 03. Maintenance-free: Additional Coating is not required. 04. Design, manufacture and do the quality control in factory 05. Fast and efficient installation by special jacking system: 06. Safe, skill-free: less working aloft, no need for long time worker training 07. Less influenced by local weather 08. Possible to relocate, expand and reuse 09. Beautiful appearance 10. Low installation cost due to mechanically installation tools, less manual work and elimination of field welding.

Detailed Product Description Item: Dry Desulfurization System Material: Glass-Fused-To-Steel Type: Bolted Steel Tank Coat Thickness: 0.25-0.45mm High Light: biogas purification equipment, biogas scrubbing system Dry type desulfurization system/ H2S remove systemWhy we need desulphurizationRemoval of H2S is often required for reasons of health, safety, environment and corrosion of equipment such as gas engines, boilers and piping. Desulphurization is also is necessary when biogas is upgraded to natural gas quality and injected in the grid.Dry desulfurization system is a standardized desulfurization process designed by our company based on the users’ gas hydrogen sulfide (H2S) content, the actual gas volume, the required life cycle and the professional design and production. Tailor-made design dimensions and internal structure. Different types of gas, hydrogen sulfide content in different gases, different gas pressure requirements of the design of the desulfurization equipment is different in size, the internal structure is different. The desulfurization system is suitable for the gas with low hydrogen sulfide content and low gas flow rate, and the requirement of desulfurization precision is high, especially for prolonging the service life of the generator and the follow-up equipments. Dry desulfurization principle:The basic principle of dry removal of hydrogen sulfide (H2S) in methane gas is a method of O2 oxidation of H2S to sulfur or sulfur oxide, also known as dry oxidation method. The formation of dry equipment is, in a container into the filler, the filler layer has activated carbon, iron oxide, etc.. The gas in low flow from one end of the container through the filler layer, hydrogen sulfide (H2S) oxidation of sulfur or sulfur oxides, remaining in the filler layer, the purified gas is discharged from the other end of the container.Dry desulfurization characteristics:1. Simple structure, easy to use.2. Unattended, regular refueling work process, with a prepared, alternate operation.3. Operating cost is high.4. Compared with wet desulfurization, it needs regular refueling.5. Suitable for the treatment of small gas, high desulfurization accuracy of the gas, with the rapid detection of hydrogen sulfide test tube to determine the effect of inorganic sulfur removal can be reduced to 15ppm.

Detailed Product Description Type: Bolted Steel Tank Holiday Test: Up To 1500V Coat Thickness: 0.25-0.45mm Material: Glass-Fused-To-Steel High Light: biogas purification equipment, h2s removal system Chemical desulphurization, purification for biogas, H2S removeHydrogen Sulfide (H2S) is a harmful impurity in biogas, to protect the biogas generator, CHP, biogas boiler and the pipeline from corrosion, H2S must be removed from the biogas. YHR has developed a series of desulphurization solutions with partent. The right solution will be offered according to the H2S concentration and final biogas usage.Chemical desulphurization system is adapted to projects with small biogas amount. It uses Ferric Oxide (Fe3O2) as agent to absorb the H2S in the biogas. Depending on the need of the client, YHR can customize the system.

Detailed Product Description Biogenic Methane Index: Over 97% Methane Recovery: Over 96% Mode To Utilize Biomethane: CNG Or Gas Network Unit Energy Consumption: 0.15-0.25Kwh/Nm3 Methane Operating Pressure: Medium Or Low Pressure, 5-10/10-20 Bar Warranty: 2 Years High Light: 20 Bar Biogas Purification System, Membrane Biogas Purification System Biogas Upgrading System with Membrane for Biogas PurificationBiogas Upgrading SystemBiogas is a renewable energy source and mostly produced from anaerobic digestion (AD). Biogas composition varies with the biomass digested and contains mainly methane (CH4) and carbon dioxide (CO2), as well as traces of hydrogen sulfide (H2S), ammonia (NH3), hydrogen (H2), nitrogen (N2), carbon monoxide (CO), oxygen (O2). Membrane technology as purification process is a relatively recent but very promising technology. Also, hybrid processes where membranes are combined with other processes are believed to have lower investment and operation costs compared with other processes.Biogas Upgrading System Specification Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 96% Mode to utilize Biomethane: CNG or Gas Network Unit Energy Consumption: 0.15-0.25 Kwh/Nm³ Methane Operating Pressure: Medium or Low Pressure, 5-10 or 10-20 Bar (According to the product configuration) Environmental Benefits: Minimum Greenhouse Gas EmissionsSystem CompostionPicturesMembrane TechnologyFor the Membrane we choose EVONIK as our partner and membrane supplier. Their membrane upgrading process with SEPURAN® Green delivers a constant high biomethane grade with more than 99% purity. In other words, almost all the methane is recovered in bio natural gas quality.Evonik has developed a biogas upgrading process that makes best use of the membranes' separation properties: Through skillful connection of SEPURAN® Green membranes it is possible to obtain methane with a purity level of up to 99% from the crude gas. Just one compressor is needed.SEPURAN® Green membranes have the highest CO2/CH4 selectivity and are therefore a superior technology for upgrading biogas. This selectivity of the membranes enables the production of high purity biomethane with superior methane recovery. This distinguishes the Evonik membranes from other membranes that are available.BENEFITS OF SEPURAN® GREEN MEMBRANE TECHNOLOGY Reduced operating costs Low Investment Easy to operate Low space requirement and short installation times Flexible and modular Installation No chemicals required No additional drying stageTypical ConfigurationThree Stage Membrane Process — Medium Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas qualityMethane Recovery: Over 99% Mode to utilize Biomethane: CNG or Gas Network Unit Energy Consumption: 0.25-0.25 Kwh/Nm³ Methane Operating Pressure: Medium Pressure, 10-20 Bar Environmental Benefits: Minimum Greenhouse Gas EmissionsTwo Stage Membrane Process — Medium Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas qualityMethane Recovery: Over 97% Mode to utilize Biomethane: CNG Unit Energy Consumption: 0.25-0.25 Kwh/Nm³ Methane Operating Pressure: Medium Pressure, 10-20 Bar Environmental Benefits: Lower Greenhouse Gas Emissions​Two Stage Membrane Process — Low Pressure Biogenic Methane Index: Over 97% or recovered in bio natural gas quality Methane Recovery: Over 96% Mode to utilize Biomethane: Gas Network Unit Energy Consumption: 0.15-0.20 Kwh/Nm³ Methane Operating Pressure: Low Pressure, 5-10 Bar Environmental Benefits: Lower Greenhouse Gas EmissionsCompany ProfileAbout YHRYHR, a high-tech enterprise, is committed to the R&D and promotion of resourcefully utilizing agricultural organic waste, livestock and poultry wastewater treatment and anaerobic technology for high-concentration organic wastewater. As a domestic leading biogas engineering contractor, the company also acts as a benchmark enterprise in China's Glass-Fused-to-Steel Tanks industry. Providing design, production, installation, sales and commissioning services for complete-set environmental protection equipment including Glass-Fused-to-Steel Tanks, anaerobic reactors, biogas gas storage tank, biogas desulfurization equipment, biogas upgrading system, etc. for the sewage treatment sector and biomass biogas, YHR has developed itself steadfastly. YHR will always strive for the construction of beautiful countryside.

Detailed Product Description Material: Glass-Fused-To-Steel Type: Bolted Steel Tank Coat Thickness: 0.25-0.45mm Holiday Test: Up To 1500V High Light: biogas purification equipment, biogas scrubbing system Biological DesulphurizationHydrogen Sulfide (H2S) is a harmful impurity in biogas, to protect the biogas generator, CHP, biogas boiler and the pipeline from corrosion, H2S must be removed from the biogas. YHR has developped a serie of desulphurization solutions with partent. The right solution will be offered according to he H2S concentration and final biogas usage.

Geodesic roofs are the newest roof type developed by YHR engineer which is designed to march perfectly with YHR Steel Bolted Tanks. This type of roof is widely used for Potable water storage, waste water treatment and dry bulk storage. Geodesic Roof is with the following advantages to make it ideal solution in many cases: Self-supporting The light weight of the material and the advantaged framing system enable YHR Geodesic roof to be self supported on the tank wall and no in-tank column is needed, even with large tank diameter till 100 meter. Safe structure to adapt different conditions The roof’s well calculated and examined structure make it able to meet many challenge from the environment. The geodesic geometry can hold the high snow load, high wind load and the seismic zone. With the sealing system, the roof can achieve air-tightness under the atmosphere pressure, so to have great odor control performance. Low Maintenance cost YHR Geodesic Roof uses high quality Aluminum alloy, the material has a naturally corrosion resistance in the atmosphere. So during the tank’s life service time (more than 30 years), no maintenance will be needed, the roof will keep it’s beautiful appearance. In high corrosive environments, the roof can have further surface treatment such as Anodic Oxidation. Easy and fast construction The dome roof is designed to work with YHR bolted tank, the effective frame and sealing system allow rapid construction, the jacks used for YHR tank wall installation will also be able to used for the roof, no second investment will be needed. The workers can safely stay on the ground for the installation, and no experience are requested.

Detailed Product Description Coat Thickness: 0.25-0.45mm Holiday Test: Up To 1500V Type: Bolted Steel Tank Material: Glass-Fused-To-Steel High Light: biogas purification equipment, h2s removal system Large scale biogas plant Chemical desulphurization system/ H2S purificationWhy we need desulphurizationRemoval of H2S is often required for reasons of health, safety, environment and corrosion of equipment such as gas engines, boilers and piping. Desulphurization is also is necessary when biogas is upgraded to natural gas quality and injected in the grid.1.iron oxideIron Oxide Desulfurizer is made of iron,manganese salt and their oxide as raw material,pass through the process chemosynthesis to be active oxide,then add the assistant and binder to make it columnar solid .It has features of larger sulfur capacity ,small resistance,high purification capacity and good water resistance .2.Physical&Chemical Properties and Service conditions Item Index Remarks Saturation sulfur capacity ≥550mg/g (under normal temperature, the original size) Filling density 0.7~0.75kg/L Water capacity ≥45.0% Desulfurization precision ≤0.5ppm Contact time or 30 seconds, the import H2S10-15 mg/Nm3, airspeed acuities 1000 h - 1, temperature 15 °C to 55 specific surface area 70~80m2/g Radial pressure strength ≥40N/cm Moisture <10.0% Grain degree φ3.5~5×L5~15 Water resistance strength With water or distilled water boiling 15 min above, not natural broken or mud change, flooding after drying constant regeneration activity main ingredients Fe2O3·xH2O Fe(OH)3·xH2O APPLICATIONS For the nature gas,coke oven gas, water gas , biogas 3.Desulfuration and Renewal Principles of the ferric oxide Desulfuration Reaction: Fe2O3.H2O+3H2S=Fe2S3.H2O+3H2ORenewal Reaction: 2Fe2S3.H2O+3O2=2Fe2O3.H2O+6S (strong exothermic reaction)

Detailed Product Description Coat Thickness: 0.25-0.45mm Holiday Test: Up To 1500V Type: Bolted Steel Tank Material: Glass-Fused-To-Steel High Light: biogas purification equipment, h2s removal system Large scale biogas plant Chemical desulphurization system/ H2S purificationWhy we need desulphurizationRemoval of H2S is often required for reasons of health, safety, environment and corrosion of equipment such as gas engines, boilers and piping. Desulphurization is also is necessary when biogas is upgraded to natural gas quality and injected in the grid.1.iron oxideIron Oxide Desulfurizer is made of iron,manganese salt and their oxide as raw material,pass through the process chemosynthesis to be active oxide,then add the assistant and binder to make it columnar solid .It has features of larger sulfur capacity ,small resistance,high purification capacity and good water resistance .2.Physical&Chemical Properties and Service conditions Item Index Remarks Saturation sulfur capacity ≥550mg/g (under normal temperature, the original size) Filling density 0.7~0.75kg/L Water capacity ≥45.0% Desulfurization precision ≤0.5ppm Contact time or 30 seconds, the import H2S10-15 mg/Nm3, airspeed acuities 1000 h - 1, temperature 15 °C to 55 specific surface area 70~80m2/g Radial pressure strength ≥40N/cm Moisture <10.0% Grain degree φ3.5~5×L5~15 Water resistance strength With water or distilled water boiling 15 min above, not natural broken or mud change, flooding after drying constant regeneration activity main ingredients Fe2O3·xH2O Fe(OH)3·xH2O APPLICATIONS For the nature gas,coke oven gas, water gas , biogas 3.Desulfuration and Renewal Principles of the ferric oxide Desulfuration Reaction: Fe2O3.H2O+3H2S=Fe2S3.H2O+3H2ORenewal Reaction: 2Fe2S3.H2O+3O2=2Fe2O3.H2O+6S (strong exothermic reaction)

Detailed Product Description Holiday Test: Up To 1500V Coat Thickness: 0.25-0.45mm Type: Bolted Steel Tank Material: Glass-Fused-To-Steel High Light: biogas scrubbing system, h2s removal system Biogas desulfurization system/ H2S purification/ YHR scrubberWhy we need desulphurizationRemoval of H2S is often required for reasons of health, safety, environment and corrosion of equipment such as gas engines, boilers and piping. Desulphurization is also is necessary when biogas is upgraded to natural gas quality and injected in the grid.Benefits WIth YHR Chemical desulphurization Professional team Experienced in biogas industry Low investment Plug and use, no conmissioning time needed