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  • 1
    Online Resource
    Online Resource
    Sugarcane Bioethanol Processing Plant in the Philippines: Energetics and Water Inventory
    School of Environmental Science and Management, University of the Philippines Los Banos ; 2020
    In:  Journal of Environmental Science and Management Vol. 23, No. 2 ( 2020-12-31), p. 80-88
    Details
    In: Journal of Environmental Science and Management, School of Environmental Science and Management, University of the Philippines Los Banos, Vol. 23, No. 2 ( 2020-12-31), p. 80-88
    Abstract: Biofuels production is intended to address shortage on fuel supply. This study assessed the energetics and water inventory of the Philippine bioethanol production from sugarcane, aiming to provide a definitive value from where studies for economic assessment for this system could pick up. A 30-million-liter-per-year (MLPY) processing facility was designed using local field and factory data, from surveys and immersion reports. Assessment showed that sugarcane bioethanol processing facility with co-generation and wastewater treatment units gains a net energy equivalent to 18.62 MJ L-1 of bioethanol produced, with an energy returned on energy invested ratio of 2.75. The net energy realized from the production compensates the energy expended during the construction of the bioethanol plant within about eight months of operation. Water is being used up at a rate of 2,832.22 L per L of ethanol produced or 133.60 L per MJ or 197,826.09 L per Mg of cane processed, accounting the water used for plantation and the factory. The water inventory in the construction level amounts to 952.64 ML. The production of bioethanol from sugarcane is practical, energy-wise, but its water consumption might make the industry unviable in locations where water is scarce.
    Type of Medium: Online Resource
    ISSN: 0119-1144
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.47125/jesam/2020_2/
    DOI: 10.47125/jesam/
    DOI: 10.47125/jesam/2020_2/09
    Language: Unknown
    Publisher: School of Environmental Science and Management, University of the Philippines Los Banos
    Publication Date: 2020
    Location Call Number Limitation Availability
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Tree Utilization Patterns in Selected Protected Areas in the Visayas
    Science and Humanities Journal, Visayas State U ; 2006
    In:  Science and Humanities Journal Vol. 6, No. 1 ( 2006-12-19), p. 1-17
    Details
    In: Science and Humanities Journal, Science and Humanities Journal, Visayas State U, Vol. 6, No. 1 ( 2006-12-19), p. 1-17
    Abstract: Tree resources in protected areas in the Visayas were mainly used for construction materials and firewood. Inhabitants inside prodtected areas harvested timber for their own light construction needs and for firewood mostly for household consumption. Illegal harvest of timber for commercial trade was still prevalent but perpetrated by highly influential people staying outside protected areas. Participation of local inhabitants was limited on the transport of lumber from the cutting area to the designated landing sites. Most preferred timber species for construction came from the Dipterocarp family, which are available only in secondary and primary forests. Owing to their being readily available in the locality, exotic species also proved a good source of construction materials. The most preferred firewood species wer gap species collected from nearby regeneration areas and woodlots. Local availability and abundance were the primary considerations with respect to preferences for firewood species.
    Type of Medium: Online Resource
    ISSN: 0119-4909
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.47773/shj.1998.061
    DOI: 10.47773/shj.1998
    DOI: 10.47773/shj.1998.061.1
    Language: Unknown
    Publisher: Science and Humanities Journal, Visayas State U
    Publication Date: 2006
    Location Call Number Limitation Availability
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  • 3
    Online Resource
    Online Resource
    Vulnerability to Flooding of the Towns of Mabitac and Santa Maria, Laguna, Philippines
    School of Environmental Science and Management, University of the Philippines Los Banos ; 2014
    In:  Journal of Environmental Science and Management Vol. 17, No. 2 ( 2014-06-30), p. 17-28
    Details
    In: Journal of Environmental Science and Management, School of Environmental Science and Management, University of the Philippines Los Banos, Vol. 17, No. 2 ( 2014-06-30), p. 17-28
    Abstract: The combination of flood modelling and socio-economic analysis was used to determine the flood vulnerability of the towns of Santa Maria and Mabitac, Laguna, Philippines. Geograhic Information System (GIS)-hazard mapping and vulnerability-resilience indicator were used to assess the interaction of a flood hazard and the socio-economic conditions of the people in the area. The Hydrologic Engineering Center Hydrologic Modelling System (HEC-HMS) and Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modelling system was used to derive the synthetic hydrograph and delineated the inundated areas in the flood-prone barangays (village) of Santa Maria and Mabitac. The flood modelling predicted the flood depths in seven out of ten communities and delineated the inundated barangays of the two towns. The social vulnerability analysis indicated that Barangays (village) Jose Rizal, Masinao, Adia and Coralan in Santa Maria and Barangays San Antonio, Libis ng Nayon, Bayanihan, Pag-asa, Nanguma and Lambac in Mabitac are very vulnerable to flooding. The study revealed environment-related aspects that are helpful in reducing the impacts of flooding such as, strengthening the flood warning system and emergency response capacity through flood hazard zonation mapping and rehabilitation of the watershed in Santa Maria.
    Type of Medium: Online Resource
    ISSN: 0119-1144
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.47125/jesam/2014_2/
    DOI: 10.47125/jesam/
    DOI: 10.47125/jesam/2014_2/02
    Language: Unknown
    Publisher: School of Environmental Science and Management, University of the Philippines Los Banos
    Publication Date: 2014
    Location Call Number Limitation Availability
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  • 4
    Online Resource
    Online Resource
    Energetics and Water Requirement of a Commercial- Scale Sweet Sorghum Ethanol Production
    School of Environmental Science and Management, University of the Philippines Los Banos ; 2017
    In:  Journal of Environmental Science and Management ( 2017), p. 1-11
    Details
    In: Journal of Environmental Science and Management, School of Environmental Science and Management, University of the Philippines Los Banos, ( 2017), p. 1-11
    Abstract: This study quantifies the energy balance and water requirement for ethanol production from sweet sorghum. The energy balance assessment is important to verify if the system actually achieves a positive net energy balance, while inventory of water requirement provides primary approximation of the water economy of this alternative feedstock. The boundary of the assessment is from the production of the feedstock to the products’ end-use (cradle-to-grave). All the balances were based from a 30-M L yr-1capacity commercial bioethanol plant that operates for 270 d yr-1. The net energy balance of the system was computed by accounting the total energy consumed by the materials and processes in the boundary equated with the total energy produced through the products – power and biofuel. From the assessment, it was verified that the production gains a net energy equivalent to 475,621,789.51MJ yr-1 or 15.85 MJ L-1 of ethanol produced. Since the assessment assumed that a new bioethanol facility will be put up, the analysis included the energy invested during this pre-operational period, termed as “energy debt.” Construction of the whole facility expended a total of 1,127,076,244.75MJ energy or 37.57 MJ L-1 ethanol. However, because the system gains a net energy, a payback period for the energy invested was computed by dividing the total energy debt by the net energy gain. It was deduced that energy debt can be offset or paid back within 2.37 years of operation. Meanwhile, the total water economy in the construction of the bioethanol plant amounts to 960,453.44 m3. Likewise, the whole operation consumed a total of 12,368,904,260.86 L for a year’s operation, which is equivalent to 412.30 L water L-1 ethanol produced, or 19.45 L MJ-1, or 24,541.48 L T-1 cane processed.
    Type of Medium: Online Resource
    ISSN: 0119-1144
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.47125/jesam/2017_sp1/
    DOI: 10.47125/jesam/
    DOI: 10.47125/jesam/2017_sp1/01
    Language: Unknown
    Publisher: School of Environmental Science and Management, University of the Philippines Los Banos
    Publication Date: 2017
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  • 5
    Online Resource
    Online Resource
    Life Cycle Assessment of Manila Hemp in Catanduanes, Philippines
    School of Environmental Science and Management, University of the Philippines Los Banos ; 2015
    In:  Journal of Environmental Science and Management Vol. 18, No. 2 ( 2015-12-31), p. 53-61
    Details
    In: Journal of Environmental Science and Management, School of Environmental Science and Management, University of the Philippines Los Banos, Vol. 18, No. 2 ( 2015-12-31), p. 53-61
    Abstract: Environmental burdens of one ton baled abaca fiber, which is exported as Manila hemp, were determined using life cycle assessment with three phases: plantation establishment and fiber harvesting, fiber trading, and grading and baling of fiber. Abaca fiber was organically produced in Catanduanes. One hectare abaca plantation produced an average of 830 kg fiber with a total mean discarded biomass of 5.7 t. A barangay trader can purchased 712 kg of dry fiber per week while Grading and Baling Establishment (GBE) procured and processed 250 t mo-1. One ton of baled fiber required 1.6 ha plantation with 2,132 undamaged abaca hills that produced 1,052.6 kg dry abaca fiber. Harvesting produced about 80.2 t of discarded materials and weeds which used as mulch, however, estimated soil nutrient loss was 0.5 kg N and 0.1 kg P and 5.4 kg K. Trading and baling produced 52.6 kg fiber by-product used for furniture making; more than 5 kg of fiber dust and a total global warming potential of 47.7 kg CO2 equivalent. The following are recommended to improve farm productivity: a) use of organic fertilizer to replace the nutrient loss; b) improve stripping device to enhance fiber quality; and c) utilize farm waste for soil conservation. Local policy on abaca trading was recommended to increase farmer’s share. GBE must provide mechanism to improve environmental work condition and strictly enforce the use of ear plug to avoid hearing loss of workers.
    Type of Medium: Online Resource
    ISSN: 0119-1144
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.47125/jesam/2015_2/
    DOI: 10.47125/jesam/
    DOI: 10.47125/jesam/2015_2/06
    Language: Unknown
    Publisher: School of Environmental Science and Management, University of the Philippines Los Banos
    Publication Date: 2015
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  • 6
    Online Resource
    Online Resource
    Indigenous Goby Population in Mandulog River System and its Conservation by Communities in Iligan City, Philippines
    School of Environmental Science and Management, University of the Philippines Los Banos ; 2013
    In:  Journal of Environmental Science and Management Vol. 16, No. 2 ( 2013-12-31), p. 11-18
    Details
    In: Journal of Environmental Science and Management, School of Environmental Science and Management, University of the Philippines Los Banos, Vol. 16, No. 2 ( 2013-12-31), p. 11-18
    Abstract: Threats of water pollution, unregulated extraction of resources, and sprawling urbanization are some of the common issues of Mandulog River, a home for indigenous freshwater gobies. This study was conducted to assess the status of freshwater gobies and how the resident communities exert conservation efforts to the river and the inhabiting gobies. Standard method of collection of gobies was done. Interviews with semi-structured questionnaires were used to know the conservation measures of the residents. Ten goby species belonging to three families namely, Family Eleotridae (Belobranchus belobranchus), Giuris margaritacea, and Oxyeleotris lineolata, Family Gobiidae (Awaous melanocephalus), Awaous ocellaris, Glossogobius celebius, Glossogobius giuris, Periophthalmus barbarus and Sicyopterus lagocephalus, and Family Rhyacichthyidae (Rhyacichthys aspro), can be an alternative source of food and livelihood. They were caught by-catch, while employing some destructive fishing methods like cyanide fishing, electric fishing, and use of fine mesh nets. The awareness of the residents to the adverse impacts of water pollution, unregulated human activities, and destructive fishing had strengthened their conservation measures. A multi-stakeholder management approach is created through concerted proactive conservation measures like protection of the goby population, the river-riparian ecosystems, enhanced scientific information, and the legal intervention of the local government.
    Type of Medium: Online Resource
    ISSN: 0119-1144
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.47125/jesam/2013_2
    DOI: 10.47125/jesam/
    DOI: 10.47125/jesam/2013_2/02
    Language: Unknown
    Publisher: School of Environmental Science and Management, University of the Philippines Los Banos
    Publication Date: 2013
    Location Call Number Limitation Availability
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  • 7
    Online Resource
    Online Resource
    Agroecosystem analysis of Laguna Lake in the Philippines
    Informa UK Limited ; 1994
    In:  SIL Communications, 1953-1996 Vol. 24, No. 1 ( 1994-01), p. 259-264
    Details
    In: SIL Communications, 1953-1996, Informa UK Limited, Vol. 24, No. 1 ( 1994-01), p. 259-264
    Type of Medium: Online Resource
    ISSN: 0538-4680
    URL: Article
    DOI: 10.1080/05384680.1994.11904046
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 1994
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