Biogas Plants
Turnkey anaerobic digestion plants from 100 kg/day to multi-tonne capacity for kitchens, farms, campuses and industry.
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Energy From Five Elements
Engineering Sustainable Energy Solutions
Delivering reliable Biogas, Bio-CNG, Solar Energy, Waste Management, STP & ETP solutions across India.
12+
Years of field
engineering
engineering
About Sewaf Energy
Converting waste into dependable energy
Sewaf Energy India Pvt. Ltd. is a renewable energy engineering company delivering sustainable solutions in Biogas, Bio-CNG, Solar Energy, Waste Management, Sewage Treatment Plants (STP) and Effluent Treatment Plants (ETP).
We help industries, farms, institutions and municipalities convert waste into valuable energy while reducing environmental impact.
- In-house process, mechanical and electrical engineering capability
- Single-point EPC responsibility from concept to commissioning
- Long-term AMC, revamping and operator training programmes
01
Mission
Deliver sustainable engineering solutions that turn waste and natural resources into reliable, economically viable energy.
02
Vision
Become India's most trusted renewable energy engineering company — measured by plant uptime, client outcomes and environmental impact.
03
Values
Innovation
Integrity
Sustainability
Quality
Customer Commitment
Why choose us
Engineering discipline behind every plant we build
We are judged on uptime, gas yield and effluent quality — not on brochures. That standard shapes how we design, build and support.
Experienced Engineers
Mechanical, process and electrical engineers with hands-on commissioning experience across India.
Customized Design
Every plant is sized around your feedstock, load profile and site — never a catalogue solution.
Reliable Technology
Proven digester, purification and treatment technologies selected for uptime, not novelty.
End to End EPC
Single-point responsibility for design, fabrication, civil coordination, erection and commissioning.
AMC Support
Structured annual maintenance with preventive schedules, spares planning and performance reporting.
24×7 Technical Assistance
Remote diagnostics and on-call engineering support so your plant never stays idle.
Our solutions
A complete renewable energy engineering portfolio
Eight capability lines, one accountable partner — from first feasibility note to the ninth year of maintenance.
Bio-CNG Plants
Complete Bio-CNG chains — upgrading, H₂S removal, compression, cascade storage and cylinder filling.
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Solar EPC
Rooftop and ground-mounted solar PV design, supply, installation and commissioning with performance guarantees.
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Waste Management
Segregation, shredding, composting and resource-recovery systems that divert organic waste from landfill.
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Sewage Treatment Plants
MBBR, SBR and MBR based STPs engineered for reuse-grade water and low operating cost.
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Effluent Treatment Plants
Industrial ETPs designed around your effluent characteristics to meet pollution control board norms.
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Engineering Consultancy
Feasibility studies, DPRs, process design, mass-energy balance, vendor evaluation and third-party audits.
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AMC & Plant Revamping
Annual maintenance contracts, spares, operator training and revamping of under-performing plants.
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Plants running in the field, not on paper
Pradeep Ramaraj
Managing Director
Managing Director
Leadership
Led by engineers who commission plants themselves
Mr. Pradeep Ramaraj is a Mechanical Engineer and renewable-energy entrepreneur with practical experience in Biogas, Bio-CNG, Solar Energy, Waste Management, Sewage Treatment and Effluent Treatment solutions.
Under his leadership, Sewaf Energy India Pvt. Ltd. delivers technically reliable, commercially viable and customer-focused renewable-energy projects across India. His expertise spans engineering design, project execution, commissioning, operational support and long-term maintenance.
Biogas
Bio-CNG
Solar EPC
Waste Management
STP
ETP
Consultancy
Plant Revamping
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Our objective is to convert waste and natural resources into sustainable energy solutions that create long-term value for our customers and the environment.
Pradeep Ramaraj — Managing Director0
Projects Completed
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Happy Clients
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Why invest in biogas
One investment, six returns
A well-sized digester pays back through avoided fuel purchase, avoided waste disposal cost, fertilizer value and carbon performance — simultaneously.
Request FeasibilityWaste Reduction
Divert wet and organic waste from landfills and open dumping.
Clean Energy
Replace LPG, diesel and furnace oil with on-site renewable gas.
Lower Fuel Cost
Typical fuel savings of 30–60% with attractive payback periods.
Organic Fertilizer
Nutrient-rich digestate returns carbon and nutrients to the soil.
Lower Carbon Emissions
Captured methane avoids potent greenhouse gas release.
Sustainable Future
Circular resource loops that strengthen ESG and compliance.
Bio-CNG process
From cattle waste to vehicle-grade fuel
01
Cow Waste & Organics
Cattle dung, press mud, food and agro waste collected as feedstock.
02
Collection & Pre-treatment
Screening, slurry preparation and consistent feed dosing.
03
Digester
Anaerobic digestion at controlled temperature and retention time.
04
Biogas Production
Raw biogas at 55–65% methane is captured and stored.
05
Gas Purification
H₂S, moisture and CO₂ removal to reach >95% methane.
06
Compression
Multi-stage compression to 200–250 bar.
07
Cylinder Filling
Cascade storage and cylinder / cassette filling stations.
08
Vehicle Fuel
Bio-CNG dispensed as a direct CNG substitute.
09
Organic Fertilizer
Digestate processed into liquid and solid bio-fertilizer.
Testimonials
What our clients say after commissioning
FAQs
Questions we are asked most often
Still unsure whether your site suits a biogas or Bio-CNG plant? Talk to an engineer — not a salesperson.
All FAQsBiogas is a renewable fuel produced when organic matter — food waste, cattle dung, agro residue or sludge — is digested by micro-organisms without oxygen. It typically contains 55–65% methane and can directly replace LPG for cooking, heating or power generation.
Bio-CNG is purified biogas. Carbon dioxide, hydrogen sulphide and moisture are removed until methane exceeds 95%, after which the gas is compressed to 200–250 bar and filled into cylinders for use as vehicle fuel or bottled industrial fuel.
Compact pre-fabricated units are commissioned in 4–8 weeks. Mid-size biogas and STP/ETP projects typically take 3–6 months, while full Bio-CNG chains with compression and filling run 6–12 months depending on approvals and civil work.
Central and state schemes support biogas, Bio-CNG (SATAT) and solar installations. Eligibility depends on capacity, feedstock and applicant category — we assist with documentation and technical annexures for applications.
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Let's Build a Sustainable Future Together
Share your waste stream, energy demand or compliance requirement. Our engineers will revert with a feasibility view, indicative capex and a delivery timeline.