Updated on May 27, 2024


Created on June 6, 2016

DTW Lotus Biogas Burner


Distributed by DTW in Cambodia, this is a biogas burner for off-grid households.

Developed By
  1. Development Technology Workshop
Tested By
  • Development Technology Unit at Warwick School of Engineering, UK
  • kiwa
  • SNV (Netherlands Development Organization)
Content Partners


Product Description

The Lotus burner is a single burner with modifications for primary air mixing and flame length using biogas as a fuel. The Lotus burner is intended for domestic use with decentralized biodigesters and stemmed from a research initiative funded by SNV and the National Biogas Programme of Cambodia. The Lotus stove was derived from the widely distributed Nepal biogas burner. For September 2018, this product is discontinued.

DTW is located in Phnom Penh, Cambodia.


Target SDGs

SDG 7: Affordable and Clean Energy

Market Suggested Retail Price


Target Users (Target Impact Group)

Household, Small and Medium-sized Enterprises

Distributors / Implementing Organizations

The National Biodigester Programme has a retail sale office where interested customers can go in person to purchase a biogas stove. Development Technology Workshop designed and manufactures the lotus stove. Netherlands Development Organization (SNV) supported the design and actively distributes the stove among their project partners.

Competitive Landscape

Direct competitors include Puxin JZZ2-A13 and Montals F2-m Biogas Stove.

Manufacturing/Building Method

It used to be mass produced, however, for September 2018, the manufacturing of this product is unknown.

Intellectural Property Type

Select Type

User Provision Model

Users can obtain the product from the National Biogas Programme retail office. The NBP office receives the stoves from the manufacturer, Development Technology Workshop.

Distributions to Date Status

10,000 sets per year since 2009.

Fuel type


Chimney (yes/no)


Forced or passive


Pot type

Flat bottom

Pot capacity (L)


Thermal efficiency (%)

58 %

PM emissions (g/MJ delivered to pot)

> 1,180 ppm

CO emissions (g/MJ delivered to pot)


Time to boil (min/L)


Design Specifications

20 bored D shaped burner ports at 5.5 mm wide and 4.5 mm deep on the vertical face of the burner. Premixed flame with varying stove body configurations to match end-user preference.

Product Schematics

Technical Support

Provided by the manufacturer, Development Technology Workshop.

Replacement Components

Rubber o-ring in the tap every 3-4 years  interview with representative


5 - 6 years interview with representative

Manufacturer Specified Performance Parameters

Carbon monoxide emissions (PPM), flue temperature, thermal efficiency and time to boil.

Vetted Performance Status

Available upon request to the manufacturer email with representative: The efficiency and gas consumption at ACTUAL CONDITIONS (T=21oC and P=1011mBar), the efficiency and gas consumption at STP (With T=0oC and P=1013..25mBar), Flame behaviour (with cooking vessel and without cooking vessel), wind sensitivity (with cooking vessel, without cooking vessel), the temperature at the base of the stoves after 1 hour use with a 35 cm cooking vessel on a wooden table, CO production at different aeration positions, flame extinction due to flame lift, need for regular maintenance of the stove i.e. oiling of the gas tap; rigidness against rough usage.


Be sure to use a flame arrestor to prevent upstream flame propagation.

Complementary Technical Systems

Varying types of biodigesters.

Academic Research and References

SNV Netherlands Development Organisation, Khandelwal, K. C., & Gupta, V. (2009, February). Popular Summary of the Test Reports on Biogas Stoves and Lamps prepared by testing institutes in China, India and the Netherlands. SNV Netherlands Development Organisation.

Decker, T (2017). A modeling tool for household biogas burner flame port design. Colorado State University.

National Biodigester Programme. n.d. nbp.org.kh.

GB/T 3606-2001 PDF in English (GBT3606-2001). n.d. www.chinesestandard.net.

Compliance with regulations

National Standard of the People’s Republic of China on Domestic Biogas Stove: GB/T 3606-2001.

Evaluation methods

Carbon monoxide emissions (PPM), flue temperature, thermal efficiency and time to boil.

Other Information


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