Biogas generation from acidic rubber effluent

June 22, 2017

Sri Lanka Placeholder
Sri Lanka

Biogas generation from acidic rubber effluent

About the Implementing organization

Name: Promotion of Bio Gas Technology & Efficient Rubber Drying Houses to reduce Green House Gas emissions associated with the rubber industry in the midland forests of Kegalle district.

Country: Sri Lanka

Year of establishment: 2014

Type of organization: Legally recognized non-profit status

Description

The waste water released from the rubber latex cleaning and coagulation process (Serum), which is slightly acidic are directly discharged without any cleaning and gets accumulated in the open land or in nearby streams. As a result of this project, this hazardous waste water is now used as biogas for cooking purposes and the remaining water is released after biological distillation. One of the two biogas plants built through the project helps to prevent pollution of habitats of a point endemic species.

Nature Element

Forests / Wildlife

Type of Action

Protection / Pollution prevention, clean up

Sustainable Development Element

Renewable energy

Related Sustainable Development Goal(s)

  

Environmental Impacts

The waste water emitted from conventional small scale rubber smoke houses pollutes nearby water bodies. The project focuses on utilizing this waste water for producing biogas. Two model bio gas plants were constructed at two locations. This purified waste water and the sludge are both used as fertilizers in the homesteads.

Since the point endemic critically endangered fish species Puntius bandula is in this vicinity, this project contributes in making the streams a conducive habitat.

Sustainable Development Impacts

Moreover, biogas is produced using the acidic effluents discharged in the rubber production. This biogas is currently used for the kitchen purposes while the possibility of it to be used directly as fuel in the rubber drying houses is still experimental.

This measure reduces hazards to aquatic biodiversity due to releasing of wastewater to natural streams. Since the point endemic critically endangered fish species Puntius bandula is in this vicinity, this project contributes in making the streams a conducive habitat by reducing the water pollution due to the rubber effluent.

Scalability

The biogas plants can be further developed so that they can be built with less cost. This will be helpful to upscale the project to the district level and to the national level.The NGO is now trying to find out the feasibility of using biogas in the rubber drying houses so that the drying houses could run on clean energy.

Replicability

The innovative model of biogas plants s has become very popular around the project area and many people have requested to build them in their premises. The NGO has plans to replicate this project with the support of Rubber Development Department in newly rubber grown areas of Sri Lanka as well. Awareness programmes and hands on experience programmes will be utilized to promote the modern technology.

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