AEB Volume 14, Number 6: June, 2020

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Structure, Composition and Economic value of the total Magrove forest in the Siahoni Village of Namlea District Buru Maluku Province

Ardi Zidan, Ridwan, S Millang

Abstract: Indonesia's coastal areas have a wide range of typologies of habitat as well as a diversity of high biota, so coastal and marine resources are strategically developed. The mangrove ecosystem is one of the potential ecosystems to be developed as an ecotourism area. Parameters measured in the form of 3 growth strata (tree, Stake, Semai) The results of the study found Avicenniaceae lanata, Rhizophora apiculata Rhizopora mucronata. The value index is important on mangrove vegetation at a tree level of 153.24. Mangrove vegetation at the level of saplings is dominated by Rhizophora apiculata with important value Index (INP) of 171.40. The total economic value of mangrove forest in Siahoni village is Rp 1,357,627,000.00 per year. The value is derived from the total direct value of Rp 919,840,000.00 per year from the utilization of cassava, shrimp, crab, firewood and ecotourism, indirect value of Rp 249,962,060.00 per year of Penghal; Ang intuition of the Sea, The chosen value of Rp 187,825,000.00 per year of biodiversity.

[ FULL TEXT PDF 1-5 ] DOI: 10.22587/aeb.2020.14.6.1

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Antimicrobial Action of Recycled Copper, Brass and Bronze Shavings for Wastewater Treatment

Torres Diana, Zaruma Alexandra, Muñoz Marcelo, Aldás María Belén

Abstract: Background: More than 80% of wastewater in the world goes into rivers and sea without any treatment. It is estimated that more than 2 million of people die every year from diarrheal diseases in the worldwide caused by inadequate sanitation and unsafe water. On the other hand, the antimicrobial property of copper has been explored for centuries. Some civilizations have used copper to treat certain ailments such as burns, infections, headaches and others. Copper and its alloys were registered as antimicrobial materials according to the Environmental Protection Agency (EPA). So, using this property with recycled materials for wastewater treatment is a useful, innovate, cost-effective and environmentally friendly alternative. Objective: This study aims to evaluate the antimicrobial properties of recycled copper, brass and bronze shavings in two types of wastewater; synthetic water (inoculated with Escherichia coli) and domestic wastewater from a river in Quito-Ecuador, through simulation batch reactors, that improve the homogenization between wastewater and recycled shavings. Results: The results obtained from synthetic water showed that copper was the most efficient material in killing fecal coliforms (99,91 %), followed by bronze (99,31 %) and finally brass (98,44 %). For the river water with an effluent of domestic sewage, the results were: copper (99.99 %), followed by bronze (99,31 %) and finally brass (98,44 %). The experiments were carried out in 2 hours with 7 g of each material. Conclusion: Copper was the most efficient material to eliminate fecal coliforms upon comparing the effectiveness of each material. The action of the shavings was better in wastewater from a river than the water inoculated with Escherichia Coli. In this way, it is demonstrated that shavings from recycled materials still conserve their antimicrobial properties.

[ FULL TEXT PDF 6-14 ] DOI: 10.22587/aeb.2020.14.6.2

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Analysis of Carbon Stocks Towards Several Cocoa Cropping Systems in Climate Change Mitigation Efforts In East Luwu Regency

Lusiana Faradilla, Kahar Mustari, Laode Asrul

Abstract: This study aims to understand the estimation of carbon stock to various cropping system that has been applied in east Luwu district, South Sulawesi province. The study was conducted in three sub-districts area in east Luwu, which are; Burau, Wotu and Mangkutana. The data was collected by differentiates K0 (un-shaded cacao cropping system), K1 (shaded cocoa cropping system), and K2 (cacao agroforestry system). The carbon stock measurement was conducted by using allometric formula on the stem diameter, tree age, and tree species which made on 20m x 20m plot with three times assessment repeated. The indicator in this study was cacao biomass and canopy shade, understorey biomass, brown waste, CWD, roots and soil. The result shows that the cropping pattern K2 produce more carbon stock than the cropping pattern K1. It is known that the highest estimated carbon stock in Burau was found in cropping pattern K2 plot 2 by 65.84 t/ha and the lowest one is in the cropping pattern K1 plot 3 by 45.79 t/ha. In Wotu, the highest deposit carbon was found in cropping pattern K2 plot 3 by 76.27 t/ha. Furthermore, the lowest carbon stock was in cropping system K1 plot 3 by 41.33 t/ha. Moreover, the highest carbon deposit in Mangkutana was found in cropping pattern K2 plot 2 by 73.02 t/ha whereas the lowest was in the cropping pattern K1 plot 1 by 55.82 t/ha

[ FULL TEXT PDF 15-20 ] DOI: 10.22587/aeb.2020.14.6.3

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