Study on the treatment of waste from biofuels production
In the “Scheme on development of biofuels up to 2015, with a vision to 2025” by the Prime Minister on 20/11/2007, Vietnam has been on the course to achieve the target in bioethanol and biodiesel production which can respond to 1% the national fuel demand in 2015, and 5% in 2025. Regarding bioethanol production, until 2010, 6 large-scale alcohol fuel plants were granted permit, among which 3 began operation, and the 3 others were under construction with investment from the National Oil & Gas Group (the Group). The three plants are expected to begin operation in 2011. Regarding biodiesel production, the Group planned to invest in the construction of 3 plants, one of them was expected to begin operation in 2011-2015, and the two others in 2016-2025.
Bioethanol production discharges waste at high load with significant concentrations of pollutants; therefore, the real efficiency of waste treatment and management needs to be examined to avoid negative impacts on the environment. Suitable management and treatment methods are necessary for waste discharged from future biodiesel plants. The “Study on the treatment of waste from biofuels production” was conducted to evaluate waste treatment methods of PVN’s current biofuel plants as the premise to develop waste treatment strategy for the other plants to be built.
Main content of the study included: Overviewing bioethanol/biodiesel production and specific waste treatment technologies for the industry; describing the current state of production and waste treatment technology of bioethanol plants under PVN as well as ones not included in the oil and gas industry; examining the composition and properties of bioethanol/biodiesel production waste; evaluating waste treatment technology of bioethanol plants under PVN and proposing improvement strategy, protocol for treatment of bioethanol/biodiesel production waste.
The study evaluated the current state of waste discharge from biofuel production in Vietnam, and the current waste treatment technologies, from which the strategy for waste management and treatment was proposed to meet the requirement of waste management legislation. Furthermore, the study also suggested new approaches for waste recycling such as biofertilizer production from biomass; energy recovery through anaerobic fermentation, co-incineration with jatropha solid mass to recover heat, all aiming for the goal of green production – clean energy in Vietnam.