Publication
Abstract:The world is currently grappling with significant challenges concerning the availability and quality of freshwater resources, which profoundly impact human life. Water-borne diseases remain a leading cause of morbidity in the Philippines. This study assessed the microbiological contamination of the Govantes River in Vigan City, which serves multiple uses, including domestic and agricultural consumption, primary production, transportation, and recreation. Multiple-tube fermentation technique was employed to determine the coliform prevalence, and the Vitek 2 system was used to identify isolated Enterobacteriaceae. The bacteriological analysis revealed that the river is highly contaminated with total and fecal coliforms during the dry and wet seasons. Klebsiella pneumonia (38.10%) was the most prevalent isolate, followed by Providencia stuartii (28.57%), AmpC β-lactamaseproducing Enterobacter cloacae (23.81%), and AmpC β-lactamase-producing Klebsiella pneumoniae (9.52%). The consistently high coliform loads across all sampling stations indicate severe contamination, and the presence of AmpC β-lactamase-producing bacteria is particularly alarming. These findings emphasize the need for comprehensive strategies to revitalize and restore the river system to protect public health.
Keywords:Waterborne, Pathogen, Contamination, Antibiotic resistance
Abstract:Oyster farming in the Philippines plays a crucial role in the livelihoods of local communities, particularly in rural coastal areas of Ilocos Sur. However, the industry faces environmental degradation, limited market demand, and a prolonged cultivation period, which hinder its profitability and sustainability. This study evaluated the physicochemical and microbiological quality of water in six selected oyster farms using standardized analytical techniques. Surface water samples were collected and analyzed for temperature, pH, turbidity, total coliforms, and fecal coliforms. Physicochemical parameters were measured using the SPARK Science Learning System, while microbial quality was assessed through multiple tube fermentation technique. Results indicate that the temperature range from 28.1 to 30.1°C and pH levels of 7.56 to 7.79 obtained from all farms are within the DENR standards and suitable for oyster culture. However, turbidity in most farms exceeded the permissible level of 5 NTU, which is dangerous for oyster health. More importantly, many of these farms' fecal and total coliform counts are alarming, far higher than the DENR standard of 70 MPN/100 mL. The conditions are generally suitable for oyster farming. However, special attention is required concerning water turbidity and microbial contamination. These factors have related implications for such farms' sustainability and the harvested oysters' safety. Regular water quality monitoring, farm management improvement practices, community education for environmental protection measures, and strict enforcement of regulation measures against potential contamination risks are recommended.
Keywords:oyster farming, water quality, sustainable aquaculture, physicochemical analysis, microbial contamination
Abstract:Hydroponic cultivation offers sustainable agricultural solutions, but the efficiency of water sources in hydroponic systems is underexplored. Understanding these sources is crucial for optimizing resource use, mitigating environmental impact, and ensuring long-term sustainability in hydroponic agriculture. This study aimed to assess the growth and yield performance of pechay (Brassica napus L.) var. Black Behi using hydroponic systems with different water sources: tap water (T1), unfiltered wastewater (T2), and filtered wastewater (T3). The research evaluated the sustainability of the CHRRO hydroponic system, which exclusively uses filtered wastewater (T3) for hydroponic cultivation. Using a Completely Randomized Design, 15 plants per treatment (T1, T2, and T3) were studied. The study measured growth parameters, including plant height, number of leaves, leaf width, and weight, and assessed the acceptability of the CHRRO hydroponic system in Bacsil, San Juan, Ilocos Sur, using standardized rating forms from experts in agriculture, science, electronics, and farming. Pechay plants in filtered wastewater (T3) exhibited superior growth and yield compared to those in tap water (T1) and unfiltered wastewater (T2). ANOVA confirmed significant differences (p < 0.05), with T3 being the most effective water source. The CHRRO system, utilizing filtered wastewater exclusively, received high acceptability ratings (mean rating: 4.56). However, Kendall's W indicated low agreement among experts (W= 0.133, p = 0.257), suggesting variability in evaluations due to differing expertise. The CHRRO system, which uses filtered wastewater, is ideal for hydroponic cultivation, and future research should include microbial analysis, nutrient profiling, economic and environmental assessments, continuous monitoring of water parameters, and expert feedback.
Keywords:Hydroponic, CHRRO hydroponic system, tap water, unfiltered wastewater, filtered wastewater
On-going
- Tracer Study on the Graduates of the College of Arts and Sciences (E-22-23-c37)
- Feasibility Study on the Offering of MS Biology in UNP (E-22-23-c43)
- Marine Macrobenthic Algae of the Coastal of Ilocos Sur, Philippines (AFNR-22-23-C11)
- Sargassum sp as Organic Supplement Substrate to the Growth and Yield Performance of Pleurotus sp. (Oyster Mushroom) (AFNR-22-23-c17)
- Potential for Community-Based Aqua Tourism Destination: Basis for Tourism Development Plan (SS-23-18)
Presentation
- Utilization of Sargassum polycystum as a Substrate Supplement for Enhance Growth and Yield Performance of Pleurotus sp (Oyster Mushroom) (2025)
- Potential of Community-Based Aqua Tourism Destination: Basis in Development Plan (2025)
- Physicochemical and Microbiological Analysis of Selected Oyster Farms in Ilocos Sur, Philippines (2025)
- Potential of Community-based Aqua Tourism Destination: Basis for a Development Plan (2025)
- Physicochemical and Microbiological Analysis of Selected Oyster Farms in Ilocos Sur, Philippines (2024)
Citations
- Assessment of the Diversity of Macrofauna of Govantes River in Vigan City, Ilocos Sur, Philippines (2025) https://bioflux.com.ro/docs/2025.285-298.pdf
- Assessment of the Diversity of Macrofauna of Govantes River in Vigan City, Ilocos Sur (2025) https://bioflux.com.ro/docs/2025.285-298.pdf
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