Kitchen CNG Plants


Our innovative idea of Tiny/Mini/Small biogas unit produces cooking fuel and organic fertilizer. This unit is easy to assemble and maintain with required safety measures.
The main difference between the Commercial CNG plant output and Tiny Gas unit is the quality of the gas is only suitable for cooking purpose and domestic room heating purpose but cannot be used for CNG vehicles, as the unit produces gas that contains 55-65% of methane where the commercial CNG plants have capacity to produce 98% methane-based gas that is suitable for industrial purpose and vehicles.
In compliance to the national clean environment policy (Swachh Bharat Abhiyan), our kitchen plants recycl Bio-Waste and generating BioGas.
We have serveral models for supporting kitchen plants.

Models:
We offer following models as Kitchen Plants.

Model Description
Tini Designed for Small families with 4 members (2 adults, 2 children) with average LPG consumption of 14-15 KGs/month.
Mini Designed for Medium to Large restaurants with 100- seater capacity with average LPG consumption of 150 KGs/month.
Small Designed for Small Community with 25 families of 4 persons per family with averge LPG consumption of 250-350 KGs/month.

Input/Output of Kitchen units

:

Note: Community awareness should be organized and trained to collect all wet wastage separately.

Key ingredients of Small Gas unit:

  1. Feedstock:
    a. Kitchen Waste (Like pealed skins, soft shells and other green waste, cooked food waste)
    b. Garden Recedes (Like plants/bushes being removed, fallen leaves, weeds and other garden residues)
    c. Others Bio-degradable waste
  2. Water, Oxygen & Power
  3. Digestion Agent (A calculated quantity will be provided as mixture)
  a. Micro Elements (Bio-Elements)
  b. Regulators (Iron Hydroxide, Edible Oil, Activated Carbon)
  c. Substrate

Key Output of Gas unit:
  1. Cooking gas (Bio-Gas) up to 1 cubic meter (good for 2 hours of cooking)
  2. Liquid bio-fertilizer (LFOM) – good for home garden use that will enhance soil carbon content to great level.
  3. Other gases which will be release to air (Nontoxic, non-hazardous, not harmful)

Regulations


India's community waste management regulations, primarily under the Solid Waste Management Rules, 2016, require households and large communities like gated communities and Resident Welfare Associations (RWAs) to segregate waste at the source. It is mandated that all waste should be processed at the source in proper manner and it is more likely that the users will be ready to install Small Gas Units for managing this compliance and also save money though gas generation units. Review Polution Control Board guidelines for more informaiton:

Polution Control Board Guidelines.



Source segregation
  Separate storage: All waste must be segregated at the source into categories like biodegradable, non-biodegradable (recyclable and non-recyclable), and domestic hazardous waste.
  Biodegradable waste: This should be managed through composting or bio-methanation within the premises whenever possible.
  Non-biodegradable/Recyclable waste: This must be handed over to authorized recyclers, waste pickers, or the urban local body

Community responsibilities
  Large communities: Gated communities and RWAs with an area over 5,000 sq. m. are explicitly required to follow source segregation rules.
  Responsibility for collection: Households and communities must ensure their segregated recyclable waste is not disposed of in open spaces or municipal bins with other waste.
  Compliance: Ensure residual waste is given to the waste collectors or agency as directed by the local authority.

Central Financial Assistance (CFA)

:

For home, community and restaurant plants, the end user can get befitted from government schemes up to ₹70,400.00.
The Central Financial Assistance (CFA) for small biogas plants (1 m3 to 25 m3) ranges from ₹9,800 to ₹70,400, depending on the specific plant size.

CFA by plant capacity

Volume (Cubic Meter) General States NRE/Islands/SC/ST beneficiaries
1 ₹9,800.00 ₹17,000.00
2-4 ₹14,350.00 ₹22,000.00
6 ₹22,750.00 ₹22,250.00
8-10 ₹23,000.00 ₹34,500.00
15 ₹63,250.00 ₹37,950.00
20-25 52,800.00 70,400.00


Eligibility and application
  Beneficiaries: Individuals, households, institutions, community-based organizations, government bodies, private sector, NGOs, and cooperatives are eligible to apply.
  How to apply: Applications for "In-Principle" approval should be submitted through the BioURJA portal (https://biourja.mnre.gov.in) before commissioning the plant.
  Registration: Anyone intending to set up a biogas plant must register on the unified portal at Satat (https://satat.co.in/) to obtain a registration number, which is necessary to receive support from other government ministries and departments.

Migration from LPG to CNG



Adapting CNG (from LPG)
Compatibility Check: First, determine if your existing LPG appliance is convertible. Check the manufacturer's instructions or contact them directly. Many modern stoves have conversion kits available or a convertible pressure regulator.
Professional Installation: Due to the safety risks associated with handling flammable gases and adjusting precise components, a licensed gas technician is required for the conversion.
Required Modifications: The technician will perform the following changes:
  1. Change Burner Orifices: The small brass fittings (jets/nozzles) that regulate gas flow must be replaced with the correct size for CNG/PNG.
  2. Adjust Pressure Regulator: A new regulator designed for the specific lower pressure of CNG/PNG will be installed.
  3. Adjust Air-to-Gas Mixture: Air shutter mechanism on the burner need adjustment to achieve correct air-to-fuel ratio for proper combustion.
Safety and Compliance: The conversion must meet local safety standards (e.g., BIS certification in India) to ensure safe and efficient operation. Modified appliances may lose their original certification if not done according to manufacturer guidelines.

Changes required to LPG system conversion to CNG system:
  1. Add kitchen Gas generation unit (outdoor).
  2. Add alternative CNG storage unit (High-end CNG gas cylinder)
  3. Add junction unit that will have inlet from CNG and LPG cylinders with controller. Run Pipeline from junction unit to regular (Pipeline should withstand high pressure, as we will be storing CNG gas using high pressure), we will be using high quality, high thickness copper pipes, specially designed.
  4. Regulator (Will be replacing LPG Regulator).
  5. Changes burners (based on the model). – As the CNG burning will yield higher energy and temperature, we need less fuel for generating same energy like LPG. Even the burners need to be upgraded to sustain higher temperature, we will replace the cast iron burners with copper of mild steel burners. Even the burner gas/air mixture and hole sizes need to match.

Specifics
Migrating from LPG to CNG cooking system requires significant modifications, preferably, the use of a specifically designed CNG stove, and must always be done by a certified professional. The two systems use different fuels with distinct properties, and they are not interchangeable without technical adjustments due to critical differences in pressure, composition, and required air-to-gas mixture

Key Differences Between LPG and CNG Cooking Systems

Feature LPG (Liquefied Petroleum Gas) CNG (Compressed Natural Gas),
or PNG when Piped)
Component Propane and Butane mixture Methane and Corbon Dioxide mixture
Storage/Delivery Stored as a liquid in moderate-pressure cylinders Stored as a compressed gas at high pressure (cylinders) or delivered at low pressure via pipelines (PNG)
Operating Pressure Operates at moderate pressure (around 10-11″ WC) Operates at low pressure (around 5-7″ WC for PNG)
Density Heavier than air, tends to accumulate in low-lying areas if leaked (Riskier) Lighter than air, disperses quickly in the event of a leak (Safer)
Orifice Size Requires smaller burner orifices Requires larger burner orifices to ensure adequate gas flow
Environmental Impact Cleaner than traditional fuels, but produces more CO2 than CNG Cleaner burning, produces fewer greenhouse gases and pollutants
Energy Efficiency While LPG has a higher calorific value (energy content per unit mass) compared to CNG. The real-world application efficiency of CNG is often higher. CNG engines are designed to optimize the combustion of methane, resulting in better fuel economy and lower emissions.

Important Safety Note: Never attempt to connect an LPG appliance directly to a CNG supply (or vice versa) without proper, professional conversion. The difference in pressure and gas properties can lead to serious safety hazards, including gas leaks, improper combustion, and fire/explosion risks.

Material used for CNG Adaption:

Feature Description
Component Structure Brass and steel are used for components like the reducer, cylinder valves. Choice is based on their durability and ability to withstand pressure.
Tanks CNG cylinders are made from robust materials like full steel or steel-fibre composites. Should withstand high pressures up to 200 bar.
Hoses and fittings Plastic is commonly used for hoses and some fittings within the kit. Mainly gaskets and specific washers
Electronic parts The ECU (Electronic Control Unit) and other sensors are made from electronic components, while metal casing


Choice of Material:

Material Description
Brass A strong and corrosion-resistant alloy often used for fittings and valves.
Steel Known for its strength and durability, used in tanks and other high-stress parts.
Plastic Suitable for hoses and non-structural parts due to its flexibility and lower cost.