Gian Powell B. Marquez

ORCID: 0000-0003-4640-5890
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About
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Research Areas
  • Algal biology and biofuel production
  • Phosphorus and nutrient management
  • Urban Agriculture and Sustainability
  • Anaerobic Digestion and Biogas Production
  • Methane Hydrates and Related Phenomena
  • Radioactive contamination and transfer
  • Biofuel production and bioconversion
  • Marine and coastal plant biology
  • Marine Bivalve and Aquaculture Studies
  • Coastal wetland ecosystem dynamics
  • Nuclear and radioactivity studies
  • Wastewater Treatment and Nitrogen Removal
  • Microbial Fuel Cells and Bioremediation
  • Land Use and Ecosystem Services
  • Urban Green Space and Health
  • Constructed Wetlands for Wastewater Treatment
  • Plant Molecular Biology Research
  • Radioactivity and Radon Measurements
  • Nutrition, Health and Food Behavior
  • Water Treatment and Disinfection
  • Risk Perception and Management
  • Seaweed-derived Bioactive Compounds
  • Conservation, Biodiversity, and Resource Management
  • Food Industry and Aquatic Biology
  • Microbial Community Ecology and Physiology

Ritsumeikan University
2020-2024

Nagoya University
2013-2020

University of the Philippines Diliman
2013

Instituto de la Grasa
1996

Complete nitrogen removal depends on the requirement of oxygen as an electron acceptor and organics donors. In natural environment, these acceptors donors regulate cycle in association with several nature-based processes, such iron dependent (feammox), sulphur (sulfammox), nitrite (annamox). These processes represent latest discoveries nitrification part provide for anaerobic ammonium oxidation. Research findings suggest that a previously undescribed pathway is available oxidation, which can...

10.1016/j.cej.2024.149257 article EN cc-by Chemical Engineering Journal 2024-02-03

Crisps and prefried french fries were prepared during industrial operations in order to study the possibility of using sunflower oils («normal» high oleic) instead palm olein mixtures partially hydrogenated vegetable oil frying. The quality food items was evaluated by determining total amount polar components, different components fraction (dimers, oxidized triglycerides, diglycerides), quantity cyclic fatty acid monomers (CFAM), as well 18:2 geometrical isomers. For both production crisps...

10.3989/gya.1996.v47.i1-2.836 article EN cc-by Grasas y Aceites 1996-04-30

The biogas production of seaweed is commonly patterned to conventional digester wherein the anaerobic condition optimized for terrestrial biomass. high salt content and its different structural component than plants may contribute low conversion efficiency. Hence, freshwater (FW) thalassic (TH) digestion Ulva species were compared determine more suitable condition. Biological hydrolysis pretreatment (BHP) was done improve methane yield, while NaOH (CNP) employed minimize limitation...

10.3775/jie.94.1066 article EN Journal of the Japan Institute of Energy 2015-01-01

The seasonal availability of Ulva spp. (U) poses a problem for the continuous operation thalassic (TH) biogas digesters. Hence, rice straw (RS) was tested as an alternative substrate because its abundance in Asian countries. anaerobic monodigestion (AMD) RS performed under freshwater (FW) and TH conditions to investigate production performance using terrestrial biomass. Biological hydrolysis (BH-P) 3% NaOH (NaOH-P) pretreatments were employed minimize limitation biomass methane fermentation...

10.1016/j.heliyon.2020.e05036 article EN cc-by-nc-nd Heliyon 2020-09-01

Ecklonia spp. is available during summer (June–September), making it a possible rotational brown seaweed feedstock for biogas production. Hence, production of was tested in pilot-scale (120 L volume) semi-continuous fixed-bed digester under thalassic (high salinity) condition – seeded with marine bacteria. The biogasification efficiency obtained terms its theoretical methane yield (345.6 mL CH4/g VS) 68.5%. This higher than batch (5.8%). successful may help secure the continuous operation...

10.1080/15567036.2015.1120820 article EN Energy Sources Part A Recovery Utilization and Environmental Effects 2016-09-16

The Nuclear Waste Management Organization of Japan (NUMO) was established in 2000 as the organization responsible for deep geological disposal specified radioactive waste. Their siting process initiated through open solicitation volunteer host communities. However, no communities came forward with exception Toyo Town, which applied initial literature survey, but then withdrew application due to strong opposition 2007. To identify why mayor Town failed, we analyzed his behavior and leadership...

10.3390/su12208691 article EN Sustainability 2020-10-20

Mangrove forest is an ecosystem-based solution for disaster risk reduction in the Philippines, but its historical deforestation has hampered capacity to protect coastal communities. With increasing occurrence of storm surge mangrove reforestation projects have received renewed attention, many failed. Community participation was deemed be essential those that did well. Hence, this paper examines successful restoration and rehabilitation Philippines find out how community contributed...

10.1111/disa.12630 article EN cc-by Disasters 2024-06-05

The Japanese government decided to implement environmental remediation after the Fukushima Daiichi Nuclear Power Plant (termed "1F" in Japan) accident on 11th March 2011. As initial additional annual dose target was set be 1 mSv or less as a long-term goal, we examined decision-making process undertaken by then leaders, particularly Minister of Ministry Environment (MOE) who responsible for final decision. We found that technically based assessment targets, health effects and risk-based...

10.1016/j.heliyon.2021.e06588 article EN cc-by Heliyon 2021-03-01

Biogasification is the suitable biomass-to-biofuel technology in rural areas. In coastal communities, seaweed an abundant feedstock for household biogas digester. However, biogasification requires expensive and dangerous chemicals pH adjustment. Hence, Venerupis species shell was tested as buffer on of Undaria pinnatifida. Addition 3% 5% (w/w) at start digestion successfully started [86.4 ml CH4/g volatile solid (VS) 109.5 VS, respectively]. efficiencies setups (3% shell: 24.2%, 30.7%, “BH...

10.1080/15567036.2015.1107867 article EN Energy Sources Part A Recovery Utilization and Environmental Effects 2016-09-16
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