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Investigation of Post-Fire Peatland Natural Recovery, South Kalimantan, Indonesia

100%

Wahyono S. C. , Kurnain A. , Nata I. F. , Asyari M.

2024

tom Vol. 25, iss. 4

104--115

Peatlands play a critical role in global habitats since are composed of heterogeneous materials and chemical reactions. Peatland fires significantly change the chemical characteristics of its soil, such as carbon (C), nitrogen (N), phosphorus (P) and potassium (K) content. This study aimed to measure peatland recovery only on those soil chemical characteristics based on two different times of sampling that are five years (Yr+5) and seven years (Yr+7) after the fires in 2015 (taken in 2020 and 2022). This study was conducted in the Balangan River - Batangalai River peat hydrological unit, South Kalimantan, Indonesia. Soil samples were collected at nine different locations, including are six locations in the areas that experienced fires in 2015 and three locations in the areas that did not experience fires. Those soil samples were taken with excavated pits at each sample location at each depth of 10, 20, 30, 40 and 50 cm. This study found that the carbon content in the post-fire area increased by 22.00% and in the natural area by 9.90%. The nitrogen content in the post-fire area increased by 1.94% and in the natural area by 1.17%. The potassium content in the post-fire areas increased by 16.33% and in the natural areas by 4.44%. The phosphorus content in the post-fire area increased by 3.18% and in the natural area by 5.11%. C/N ratio increased by 19.68% and C/P ratio increased by 18.24%. Overall, the increase in carbon, nitrogen, potassium, phosphorus, C/N ratio and C/P ratio in post-fire and natural peatlands indicates an improved condition. This study can provide supporting information for the regulator, management or expertise of the land and forest rehabilitation to speed up the recovery process.

Increasing Water Quality and Scalability of Peatland Water with Double Flow Ultrafiltration in South Borneo

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Nugrahadi D. T. , Wianto T. , Wahyono S. C. , Gunawan , Azwari A. R. S. , Arrahimi A. R. , Apriana S.

tom Vol. 24, iss. 9

34--44

Peatlands have ecological importance, human activities and climate change have created various environmental challenges for peatlands. One of the problems with peatlands is the degression in the quality of peat water, which has a negative impact on ecology and human health as well as the welfare of local communities who depend on peat water as a source of clean water. The problem of peat water processing lies in the need for large capacity, ease of maintenance, and water quality that meets standard criteria. The aim of this research is to evaluate the combination of filtration, absorption, and double flow ultrafiltration techniques, and compare them with single flow ultrafiltration techniques for treating peat water in the South Kalimantan region of Indonesia by looking at the amount of production and quality of water treatment results. This research proposes dual flow ultrafiltration as a solution for treating peat water on a large scale up to 2 times and results in better water quality than single flow ultrafiltration treatment. This is indicated by the percentage difference in TDS reduction of 19.5%, color of 23.1%, nitrite of 37.8%, and manganese of 69%. However, the dual flow ultrafiltration method still has a higher turbidity of around 60.65% and nitrate of about 15%. However, these water treatment results are still standardized by the Indonesia Minister of Health PERMENKES No.492/MENKES/PER/IV/2010.