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Bert Energy India · Pune · Chennai

Proven technology from Germany, Europe and Japan for India’s biogas and wastewater plants

We represent selected technology manufacturers in India and supply, install and service their equipment: more gas from the same substrate, less sludge, cleaner gas and lower operating costs.

250+ULTRAWAVES ultrasound projects worldwide
up to 2×biogas from existing plants with straw briquettes*
140+Bert biogas plants built since 2012
DE · DK · ES · JPtechnology origin, local service from Pune
Photo: BIOSONATOR on sitefrom ULTRAWAVES (permission requested)
+10–30 %biogas*
01 Ultrasound
DE ULTRAWAVES GmbH · represented in India

High-power ultrasound breaks the hydrolysis limit

The BIOSONATOR sends a partial stream of sludge or digestate through a 20 kHz ultrasound reactor. Hard cavitation cracks cells and flocs, so the bacteria reach more organic matter in less time.

Wastewater treatment

15–30 % more digester gas, less residual sludge, better dewatering, control of bulking sludge and foam.

Biogas plants

Usually 10–15 % more biogas from the same feed, higher methane, thinner digestate, cheaper fibrous substrates.

Ultrasound in detail, references and video

* Manufacturer figures, ULTRAWAVES GmbH.

Photo/video: straw briquettes and pressfrom Kinetic Biofuel (permission requested)
8–12 %straw added to slurry*
02 Straw briquetting
DK Kinetic Biofuel · represented in India

Turn crop residue into biogas

Mechanical presses compress and open up straw in one step, without water or chemicals. The briquettes soak up liquid like a sponge and go straight into the digester: no floating layers, no sediment, no clogging.

  • Paddy and wheat straw as substrate
  • About 250 Nm³ methane per tonne straw*
  • Fed by screw feeder or mixer tank
  • An answer to stubble burning
Straw briquetting in detail

* Manufacturer figures, Kinetic Biofuel / C.F. Nielsen.

03 Process optimisation

Mix better. Clean the gas inside the digester.

Two upgrades for existing plants, engineered and commissioned by our team.

Gas Lyfter mixing column, schematic

Gas Lyfter: mixing without motors in the tank

Gas released in large bubbles lifts the liquid through a vertical column and keeps the whole tank moving. Nothing rotates inside the digester.

  • Very low mixing power
  • No clogging
  • Complete mixing
  • Long life, low OPEX
Gas Lyfter in detail
Microaeration and iron dosing in a digester, diagram

Microaeration: H₂S removal in the digester

A precisely dosed trace of oxygen lets bacteria turn hydrogen sulphide into elemental sulphur. No chemicals, far less load on downstream gas cleaning.

  • Up to 99 % H₂S removal
  • At 4,000 mg/m³ inlet
  • >98 % recovered as sulphur
  • Protects engines and upgrading
Microaeration in detail
04 Further components

Everything around the BioCNG plant

05 Services

From the first lab test to daily operation

06 About us

German engineering, Indian execution

Bert Energy India is a subsidiary of Bert Energy GmbH, Leverkusen, Germany. We bring proven European and Japanese technology to India and stay on site for installation, start-up and service.

Bert Energy GmbHLeverkusen, Germany
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Bert Energy IndiaPune · Chennai
Dev AnandDev AnandManaging Director
Thomas DoryThomas DoryPresident
Sathya PrabhuSathya PrabhuCEO

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