Journal articles
https://hdl.handle.net/20.500.12852/440
2024-03-29T11:19:55ZDesign and performance evaluation of a batch-type rice hull gasifier stove
https://hdl.handle.net/20.500.12852/1892
Design and performance evaluation of a batch-type rice hull gasifier stove
Belonio, Alexis T.
A batch-type rice hull gasifier stove was designed and its performance as a potential alternative fuel saving device for cooking was evaluated.
The stove is a single-burner with a double-core, down draft type reactor. Gas is generated in the system by using a suction blower driven by a 90-watt electric motor.
Performance evaluation showed that the stove has a start-up time of 4 to 9 min and a total operating period of 0.98 to 1.25 hour per batch with corresponding rice hull consumption of 1.96 to 2.72 kg. About 1.2 to 4.0 liters of water can be boiled in the stove within 10 to 34 min while 0.7 to 1.0 kg rice can be cooked within 16 to 22 min.
Analysis showed that the stove has a gasification rate of 95 to 143 kg/m 2-hr, a fire zone rate of 0.80 to 1.02 em/min, and an average burning and thermal efficiencies of 21 and 10%, respectively.
The stove entailed an operation cost of P0.94/hr and a payback period based on electric, charcoal, and LPG stoves of 0.42, 1.30, and 3.35 years, respectively.
Journal article
1989-01-01T00:00:00ZQuality analyses of biomass briquettes produced using a jack-driven briquetting machine
https://hdl.handle.net/20.500.12852/1839
Quality analyses of biomass briquettes produced using a jack-driven briquetting machine
Romallosa, Aries Roda D.
The study relates to a compact briquetting machine developed in the Philippines that can compress and produce cylindrical briquettes having a hole at the center using biomass and urban wastes with the aid of a hydraulic jack and is semi-automatically returned to start position using a pulling device. The machine can compact 16 cylindrical briquettes in one pressing or about 200 to 240 pcs/hr. The quality of the three types of briquettes produced using waste paper, sawdust and carbonized rice husk, slightly varied. Parameters analyzed like bulk density, heating value, moisture, N and S closely met or has met the requirements of DIN 51731.
Journal article
2017-03-01T00:00:00ZSocio-economic assessment of the households along the Jalaur River system, Province of Iloilo, Panay Island
https://hdl.handle.net/20.500.12852/1670
Socio-economic assessment of the households along the Jalaur River system, Province of Iloilo, Panay Island
Dusaran, Reynaldo N.; Pabulayan, Randy Anthony V.
The socio-economic aspect of the study was conducted to organizational and socio-political involvement, economic activities and use of the river system resources by the dependent population; perceived importance of the Jalaur River System to households, immediate community and neighboring communities; and to identify problems, issues and concerns affecting the Jalaur River System. The one-shot survey design was used in collecting data from randomly selected sample households in sample barangays in the upstream, midstream and downstream areas of Jalaur River System through personal interview using a structured interview schedule. The respondents considered the Jalaur River as very important because it is the source of water for domestic use, irrigation, drinking and bathing of farm animals. It is also their source cutting of trees or vegetation. Tourism, rituals, and cultural activities were also conducted in the Jalaur River. Despite recognizing its importance, some respondents in the downstream used the river as toilet and disposed their household waste and used water into the river, as well as the waste water of their livestock. Runoff waste water drained from neighboring farms eventually goes to the river and further pollutes it, likely explaining the observed decrease. Nevertheless, some respondents claimed that the river could still be their source of income for 20 years or more.
Journal article
2010-01-01T00:00:00ZA comparative study on the effectiveness of nature farming and conventional farming technologies on the growth and yield of Dapit-saka rice selection
https://hdl.handle.net/20.500.12852/1622
A comparative study on the effectiveness of nature farming and conventional farming technologies on the growth and yield of Dapit-saka rice selection
Patricio, Hope G.; Seredrica, Ma. Victoria C.
The agronomic characteristics and yield of Dapit Saka rice selection grown using the conventional farming and nature farming methods were compared and the effect of the different nature farming concoctions against rice pests and natural enemies were evaluated from November 2002 to February 2003 in Bongco, Pototan, Iloilo. Results revealed that rice whorl maggots (<em>Hydrellia philippina</em>), white leafhoppers (<em>Cofana spectra</em>), green leafhoppers (<em>Nephotettix virescens</em>), brown planthopper (<em>Nilaparvata lugens</em>), rice stemborers (<em>Scirpophaga innotata</em>) and grasshoppers (<em>Oxya hyla intricata</em>) were found feeding on rice. Natural enemies observed included a mirid bug (<em>Cyrtorhinus lividipennis</em>), lady beetle (<em>Micraspis crocea</em>), damselfly (<em>Agriocnemis spp.</em>), ground beetle (<em>Ophionea nigrofasciata</em>), vespid wasp and spiders (Lynx spiders, <em>Oxyopes</em> spp.; dwarf spider, <em>Atypena formosana</em>; Orb spider, <em>Argiope catenulata</em>; and long-jawed spider, <em>Tetragnatha maxillosa</em>). It was noted that the use of nature farming technology and the absence of pesticides in the control resulted in more natural enemies. However, plants grown in conventional farming were significantly taller, had the most number of tillers, and heaviest panicles. These resulted in the highest grain yield of 3,466 kg/ha, a net income of P19,643.00 and an ROI of 130.80 % . These values exceeded those of plants in the nature farming technology by 1,641 kg/ha, P 5,612.65 and 25.80%, respectively.
Journal article
2007-10-01T00:00:00Z