Cassava is viable bioethanol feedstock
CASTILLA, Sorsogon—Cassava as a viable feedstock for bioethanol has been established and Sorsogon augurs well as a leading producer of the root crop and biofuel, according to Vice Gov. Renato Laurinaria.
“If cassava is becoming an important biofuel crop in other countries with more advanced national programs for biofuel production, our soils are also capable of large-scale production of the crop not only for food [and] livestock feeds but mainly for bioethanol,” he stressed.
FARMERS show off cassava tubers at a farm in Castilla, Sorsogon. A recent study declared cassava as a potential raw material for large-scale production of bioethanol. D. CALLEJA
Sorsogon has a vast agriculture space both in the upland and lowland areas suitable for cassava production because of evenly distributed rainfall. “We can easily come up with an area for a plantation [for] the operation of an ethanol distillery plant,” the vice governor said.
A study on cassava-based bioethanol production, commissioned by the Bureau of Agricultural Research (BAR), said an estimated 10,000 hectares of cassava plantation could meet the needs of an ethanol distillery plant at full capacity.
The area size is necessary to produce cassava flour for a distillery with 30 million liters capacity per year, the study conducted by the International Society for Southeast Asian Agricultural Sciences (ISSAAS) said.
“Castilla alone can already provide 5,000 hectares for this endeavor,” Laurinaria said, referring to the tracts of land his administration started to develop into cassava plantations during the later part of his incumbency as municipal mayor here.
The municipality sits on 18,620 hectares of territorial land of which 76 percent or 14,228 hectares is classified as agriculture and mostly unirrigated rice fields, coconut and root-crop plantations.
The municipality’s cassava production is sold to San Miguel Corp.’s B-MEG Feeds for its livestock feed mill in Pili, Camarines Sur.
Laurinaria’s term as mayor expired after nine years in 2007. He ran for vice governor in the local elections that same year and won.
His successor has abandoned the town’s cassava project, leaving farmers on their own and denied of the local government’s pre- and postharvest support.
“I am going to revive that cassava project on a province-wide scale, this time for bioethanol production because I was inspired by the BAR findings…into this industrial undertaking that could make Sorsogon an active participant in the national government’s initiative to make use of our agricultural crops in producing environment-friendly fuels,” he said.
It will, at the same time, provide more jobs for the local work force and income for farmers and landowners in the province, Laurinaria added.
Although agriculture products specifically grown as biofuel feedstock include several crops. Republic Act 9367, or the biofuels law, presently mandates only coconut for biodiesel and sugar cane, sweet sorghum, cassava, and corn for bioethanol.
The biofuels law took effect in 2007 and the mandated minimum blend of 1-percent coconut biodiesel or coconut- methyl ester (CME) was first implemented for all diesel engines.
The law says a 2-percent minimum blend of biodiesel should be implemented by 2009, as well as the 5-percent bioethanol for all gasoline engines. The 10-percent blend is scheduled for implementation by 2011.
Nonetheless, the E10 blend is now available in the market with sugar cane probably holding the biggest share of the market at as records from the BAR show it does best in terms of productivity compared with other sources of bioethanol.
The ISSAAS study covered all important aspects needed in producing bioethanol from cassava—from production, to postharvest, processing, marketing, organization and management, and financing.
From the point of view of financial analysis, the study considered three types of investors that would likely go into it. These are the corporate and joint venture-run cassava plantation, ethanol processing (primary and secondary) and integrated cassava plantation and ethanol production.
The ISSAAS researchers assumed that investor equity is 20 percent of the initial capital investment. They, likewise, considered securing the remaining capital requirement through a loan from the Development Bank of the Philippines at 9.75-percent interest, payable in seven years with a grace period of three years.
The hyped-up global concern over climate change and the depleting source of fossil fuels have triggered renewed interest in biofuels. Researchers for the feasibility study have observed that cassava is becoming an important biofuel crop in China, Thailand, Brazil, and other countries with more advanced national programs for biofuel production.
Cassava earned its growing popularity through the ease of its crop management. The study says the crop needs only minimum maintenance, responds well to fertilization, is typhoon- and drought-resistant, and can be harvested year-round in areas with evenly distributed rainfall.
“In general, areas suitable for sugar-cane production are also favorable for growing cassava,” the study says.
According to the study, cassava has a very high starch-to-sugar conversion ratio. High-starch content means that the crop yields a high percentage of sugar that is needed to produce biofuel.
The study, likewise, heralded it as the cheapest among the major starch-based feedstock for ethanol production.
“Average costs of feedstock per liter of ethanol from molasses and corn are quite high, while those using sweet sorghum is comparable with that of sugar cane. Potentially, feedstock from cassava can be produced at the lowest cost. With high feedstock-yield levels, ethanol yield from cassava becomes comparably better than those from sugar cane or sweet sorghum,” the study illustrates.
Part of a feasibility study is an analysis on the financial viability of a project. In this particular study, the researchers pointed out the sensitivities of cassava’s bioethanol production depending on the prevailing price of tubers, changes in yield levels, variation in overall production and total production cost.
“Cassava can also be the most expensive among the major feedstock depending on prevailing prices of tubers or derived products. Cassava used for food preparations are purchased at a higher price than those used for industrial purposes,” it revealed.
Generally, the study’s computation shows that a 10-percent increase in tuber yield will increase the average net income by 32.5 percent. On overall production, slight reductions of at least 5 percent in production cost will increase average net income by 10.1 percent, return on investment by 2.3 percent, and shorten the payback period to less than a year.
“The major components of cost are direct labor cost [44.6 percent] and direct materials [30.4 percent]. The biggest cost item for direct materials is the cost of fertilizer [73.9 percent] while harvesting expenses accounts for the larger fraction of direct labor costs,” it added.
Written by Danny O. Calleja
Source: Business Mirror