Work Packages 1 and 2

Latest update (May 2025)

Scaling Up an Innovative Rice Straw Harvesting System

During this period, the team focused on the improvement of Straw Traktor™ design to further improve its straw collection capacity. Repairs and maintenance of harvesters were also accomplished to ensure their readiness for the upcoming dry season harvesting operations.

Commercial harvesting and expansion of client farm base: An additional of five Zoomlion harvester units were added to the fleet of rice harvesting machinery bringing to a total of 18 harvester units for preparation and deployment in Laguna as well as Quezon area.

Trailer-mounted, tractor-towed transport of combine harvester for field operations

Straw Innovations technician doing checks on the machine for deployment

Dry season straw collection plan: Created straw collection plan for the upcoming dry season straw harvesting. This includes the deployment of three straw collection methods - use of self-propelled Zoomlion baler, the Straw Traktor™ with improved design to increase collection capacity, and the use of forage harvester as well as simulation of their respective operations to evaluate economic feasibility

Installation, operation, and performance analysis of unit-scale AD system: The experiment was expanded to six 1000L gas collectors using IBC tanks, each setup corresponding to treatments with varying feedstock ratio. The setup was fully installed on 16 December 2024 while data recording on daily gas production is still ongoing.

Design modification of the straw chopping unit to increase collection capacity

Fabrication personnel checking on the placement and adjustments on the chopping unit

Deployment of Straw Traktor™ for field testing

Straw collection during field testing of Straw Traktor™

Optimizing Biogas Utilization in Rice Production

During this period, the team focused on expanding its previous co-digestion setup through installation of six co-digestion AD setup with different feedstock ratios. Site and facilities preparation were also done for straw storage - for use in co-digestion and at the same time as fuel/heat source for rice drying through thermochemical reaction.

Unit-scale co-digestion experiment: Six co-digestion AD was installed and operated for biogas production using rice straw and dairy wastes as feedstock. Monitoring and recording of gas production for all setup was done on a daily basis. Relevant compliance regulations for biogas production were also revisited and reviewed for compliance.

Exploration of other heat sources: Other sources of heat for rice drying were explored - particularly straw. The team is also in talks with its suppliers on the installation of a vertical grain dryer with biomass furnace.

Site & facilities preparation: Clear steps were undertaken to allocate storage area for straw including site clearing and earthmoving operations as well as warehouse improvement for the installation of grain dryer and storage.

Mobile pyrolyzer: The team is looking into possible deployment of Takachar's mobile pyrolyzer - to test the possibility of utilizing the generated waste heat for rice grain drying operations.

Straw Innovations co-digestion setup using varying feedstock ratio

March 2025 update

Straw Innovations Ltd leads the Rice Straw Bioenergy Hub and is transforming rice straw into renewable energy for farmers in the Philippines.

To optimize the removal of rice straw from paddy fields, Straw Innovations has adopted a variety of advanced harvesters. This approach could potentially lower the costs of harvesting and collecting rice straw, addressing one of the major challenges in rice straw management. Traditionally, the slash-and-burn method has been a common practice, or rice straw is simply left to decay in the field. Both practices contribute significantly to greenhouse gas emissions, making the need for more sustainable alternatives even more urgent.

Testing of straw reaper in San Pablo Norte, Sta. Cruz, Laguna in the Philippines (May 2024)

Meanwhile, the team is also working on testing out renewable energy technologies that could power rice drying. Thus far, the team already explored gasification, and anaerobic digestion (biogas production), and in 2025, they plan to execute the pyrolysis method.

Conducted several sets of anaerobic digestion treatment, exploring various ratio and proportion that will highlight rice straws potential for biogas production.

By the end of 2025, it is expected that all operations from efficient straw collection, through transportation and processing at the hub, to productive bioenergy use for drying and milling rice, will be completed. The system holds potential for cutting rice emissions by more than 50%, whilst creating added value and jobs for local rice farming communities.