Portable Biogas Plant: With rising LPG cylinder prices, many people are looking for ways to reduce kitchen gas expenses while effectively utilising household organic waste. A portable biogas plant offers a simple solution to this. It is a compact and lightweight system that can be easily installed in homes, farms, dairies, or cattle sheds. Installation does not require extensive land or masonry work (brick and cement) and fits in small spaces.
Biogas is produced in this plant using cow dung, vegetable peels, and kitchen waste. The gas can be used for cooking, while the residual material serves as highly beneficial organic manure for fields, gardens, and potted plants. Let us explore what a portable biogas plant is, how it works, how to install it at home, and what it costs.
What is a portable biogas plant?
A portable biogas plant is a modern, lightweight gas production system designed specifically for domestic use and small-scale gas generation. It typically consists of a tank, drum, or balloon-like structure made of FRP (Fiber-Reinforced Plastic) or durable plastic. Traditional biogas plants were constructed using bricks, cement, and underground pits, a process that required significant time and expense. In contrast, a portable biogas plant comes ready-made and can be installed directly without major construction work. It can also be easily relocated if necessary.
How does a portable biogas plant work?
The working principle of a portable biogas plant is based on anaerobic digestion. In this process, specific natural bacteria gradually decompose organic waste in the absence of oxygen. Methane-rich biogas is produced during this process.
How is the gas produced?
When cow dung or organic waste is fed into the plant, bacteria gradually break it down. This process generates methane gas. The gas accumulates at the top and is piped directly to the kitchen stove. The remaining liquid residue, known as slurry, is then discharged.
What is the capacity of a portable biogas plant?
Models with various capacities are available in the market to suit different needs. Models for domestic use include 0.5-cubic-meter, 1-cubic-meter, and 2-cubic-meter options. These models require a daily input of approximately 3-6 kilograms of cow dung or other organic waste. For larger-scale requirements—such as in dairies, cattle shelters, hotels, hostels, or farmhouses—models with capacities of 1,000 litres, 1,500 litres, 2,000 litres, and higher are also available.
How is it installed at home?
A key feature of the portable biogas plant is its ease of installation. It does not require digging up the ground or brick-and-cement construction; it can simply be placed on level ground. It can easily be set up on a terrace, in a courtyard or garden, or near a cattle shed.
How long does installation take?
Installation by the company or a technician takes only about 30 minutes. This means it can be set up and made ready for use within a single day.
When is gas produced for the first time?
When the plant is first installed, it must be filled with a mixture of cow dung and water. A natural process then takes place over approximately 20 to 30 days, during which bacteria become active, and gas production gradually begins. Once this initial phase is complete, a continuous supply of gas is obtained by regularly adding cow dung or organic waste.
Benefits of a portable biogas plant
The biogas produced by the plant can be used for cooking, thereby reducing LPG cylinder consumption. Instead of discarding daily organic waste, it can be used to produce gas. Additionally, this process yields organic manure. Biogas is considered a clean fuel; it does not emit smoke. The plant is easy to clean and maintain, and when operated correctly, issues regarding unpleasant odours are minimal.
How much does it cost?
The price of a portable biogas plant depends on its capacity, manufacturer, materials used, and model. Prices for small household models start at approximately ₹14,000, while higher-capacity models may cost more. It is worth noting that government assistance or subsidy schemes for biogas projects may be available in certain states from time to time. Information regarding such schemes can be obtained from the respective state government or the local renewable energy department.
Conclusion
A portable biogas plant is a modern technology that offers a simple way to convert organic waste and cow dung into useful biogas and high-quality organic manure. Installing it does not require extensive construction work; it can be set up in a small space and moved from one location to another as needed. If you have a regular supply of organic waste or cow dung, this system can help reduce kitchen gas expenses, improve waste management, and promote organic farming.