Articles
<![CDATA[Assessment of Chemical Oxygen Demand Removal Efficiency and Microbial Dynamics during Aerobically Degradation of Wastewater in Activated Sludge ]]>
<![CDATA[Ramadhani, Ramadhani]]>;
<![CDATA[Said, Ahmad]]>
<![CDATA[ Journal Of Biology Education Vol 6, No 2 (2023): Journal Of Biology Education ]]>
Publisher : <![CDATA[Tadris Biologi IAIN Kudus ]]>
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DOI: 10.21043/jobe.v6i2.22833
<![CDATA[This study investigated aerobically COD removal and microbial dynamics during activated sludge treatment of wastewater. The 12-day experiment utilized descriptive analysis to correlate operational parameters of pH, F/M ratio, MLSS, and SVI with COD removal efficiency. Microscopic examination identified temporal shifts in abundances of bacterial flocs, flagellates, ciliates, and rotifers. COD removal declined from 79% on day 0 to 4% by day 12, corresponding with increased SVI and protozoan proliferation. High SVI caused biomass washout, reducing bacterial catabolic capacity. Predominance of bacterivorous protozoa and rotifers likely suppressed floc-forming bacteria responsible for COD biodegradation. Conserving balanced mixed communities through optimized operational conditions appears decisive for continuous treatment performance. This study provides comprehensions on microbial ecological interactions altering temporal variability in activated sludge COD removal.]]>
<![CDATA[Application of Mine Dewatering Methods to Reduce Wastewater Pollution in The Environment: Implications for Andesite Mining ]]>
<![CDATA[Adnyano, A.A Inung Arie]]>;
<![CDATA[Prastowo, Rizqi]]>;
<![CDATA[Bahy, Muhammad Nauval]]>;
<![CDATA[Hikmahtiar, Syouma]]>;
<![CDATA[Said, Ahmad]]>;
<![CDATA[Ashadi, Abdul Latif]]>
<![CDATA[ International Journal of Hydrological and Environmental for Sustainability Vol 1, No 1 (2022): International Journal of Hydrological and Environmental for Sustainability ]]>
Publisher : <![CDATA[CV FOUNDAE ]]>
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DOI: 10.58524/ijhes.v1i1.68
<![CDATA[Wastewater pollution in mining areas often occurs and becomes a problem in the surrounding groundwater aquifer system. One of the efforts to determine the distribution of wastewater pollution is to calculate the discharge and volume of wastewater. In this study, an open channel in the form of a ditch or commonly referred to as a drainage system is carried out to determine the total water discharge entering the research location, design the dimensions of the sump and design the optimal cross-sectional dimensions of the ditch to overcome the discharge of water that comes out and pollutes the environment. The method used is to make an open channel in the form of a trapezoid to be used around the andesite rock mining site which then drains the mine water to the setlingpond. Efforts to drain the water that has entered the main sump (mine dewatering system) are carried out by making wells, after which the waste water is channeled into the settling pond using a pump. From the results of the study, information was obtained that the total water discharge entering the sump was 235,175 m so that the volume of the sump made was 300 m with dimensions of top area: 20m x 10m, bottom area: 10m x 10m, with a depth of 2m for total water discharge for ditches. 0.0237 m so that the volume of the trench made is 0.228 m.]]>
<![CDATA[Three-dimensional Magnetotelluric Inversion and Magnetic for The Characterization of The Geothermal Field Reservoir Zone “X” ]]>
<![CDATA[Asrowi, Ridho Hanan]]>;
<![CDATA[Daud, Yunus]]>;
<![CDATA[Ashadi, Abdul Latif]]>;
<![CDATA[Hikmahtiar, Syouma]]>;
<![CDATA[Said, Ahmad]]>
<![CDATA[ International Journal of Hydrological and Environmental for Sustainability Vol 2, No 3 (2023): International Journal of Hydrological and Environmental for Sustainability ]]>
Publisher : <![CDATA[CV FOUNDAE ]]>
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DOI: 10.58524/ijhes.v2i3.301
<![CDATA[Geothermal as an alternative energy source that is renewable and environmentally friendly has an important role in providing domestic energy needs. Exploration is one of the most important stages in the development of geothermal energy because it can minimize the risk at the stage of exploitation and development. Geophysical methods such as geomagnet and magnetotelluric are one of the methods used in exploration. Magnetic method can provide information on the description of rock demagnetization due to the presence of heat source. However, the magnetotelluric method will provide information about rock type resistance on geothermal fields. The existence of heat source using the geomagnetic method is represented by a low anomaly value as an indication of demagnetized rocks. The results of 3D inversion processing show a low value of type resistance in the area and form an updome. The correlation of the two results of processing the data can be seen in the southern part of the "X" geothermal field research area. Based on 3D Inversion modeling it can be seen the depth of the "X" Base of Conductor (BOC) geothermal system ranges from 1000 m to -800 m with resistivity ≤ 10 Ωm which is suspected as volcanic rocks. Geothermal reservoir is at a depth of 1000 m to -2000 m with a moderate resistivity of 40 - 60 Ωm which is suspected as an andesite volcanic rock, with temperature estimates ranging from 218o C to 255o C.]]>
<![CDATA[A Review of Insights into Algae as a Sustainable Bio-based Photocatalyst for Environmental Remediation ]]>
<![CDATA[Ramadhani, Ramadhani]]>;
<![CDATA[Said, Ahmad]]>
<![CDATA[ International Journal of Hydrological and Environmental for Sustainability Vol 3, No 1 (2024): International Journal of Hydrological and Environmental for Sustainability ]]>
Publisher : <![CDATA[CV FOUNDAE ]]>
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DOI: 10.58524/ijhes.v3i1.387
<![CDATA[Algae have recently emerged as a promising photocatalyst material due to their abundancy, low cost, and environmentally friendly nature. This review summarizes recent progress on utilizing algae as bio-based photocatalysts. Eutrophication and abundance of algae which make it an ideal candidate as a sustainable photocatalyst source, have been discussed. Recent work on synthesis methods such as hydrothermal treatment, calcination, and templating to produce photocatalytically active algae nanoparticles (NPs) has been reviewed. Photocatalytic activity of algae-based materials have been studied such as wastewater treatment, dye removal, and heavy metal remediation. Finally, strategies to further enhance algae's photocatalytic performance, including coating and doping with metals, coupling with graphene, and heterogeneous integration are highlighted here. To wrap up, this review underscores the exciting potential of algae as a sustainable and effective next-generation photocatalytic material.]]>
<![CDATA[A REVIEW: FACILE AND GREEN SYNTHESIS OF MARINE MACROALGAE AND ITS PHOTOCATALYTIC PERFORMANCE ON POLLUTED WATER REMEDIATION ]]>
<![CDATA[., Ramadhani]]>;
<![CDATA[Said, Ahmad]]>
<![CDATA[ Journal of Aquatropica Asia Vol 9 No 1 (2024): Journal of Aquatropica Asia ]]>
Publisher : <![CDATA[Jurusan Akuakultur, Universitas Bangka Belitung ]]>
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DOI: 10.33019/joaa.v9i1.5245
<![CDATA[This review critically examines the burgeoning field of research focused on the environmentally benign synthesis of metallic nanoparticles exploiting the unique properties and diverse array of marine macroalgae species. Harnessing macroalgal biomolecules as reductants and stabilizers, numerous findings have discovered the biosynthesis of silver, gold, iron oxide, zinc oxide, and other nanoparticles through a sustainable "phycosynthesis" technique without toxic chemicals. Extensively characterized for their morphologies and properties, these algae-mediated nanoparticles exhibit notable photocatalytic activities in degrading various organic dyes and pollutants. Particularly, over 90% degradation efficiency has been achieved for dyes like methylene blue, methyl orange, and rhodamine B utilizing nanoparticles produced from macroalgae such as Sargassum horneri, Syringodium isoetifolium and Ulva lactuca. The mechanism is hypothesized to involve photoexcitation generating reactive oxidative species on the nanoparticle surface that rapidly cleave dye molecules. Improved understanding of the roles of macroalgal biomolecules and optimization of synthesis conditions may enable enhanced catalytic performances. With their widespread availability and biodiversity remaining largely untapped, marine macroalgae prove promising as renewable resources for developing eco-friendly water remediation technologies through metal/metal oxide nanocatalyst design.]]>
<![CDATA[Microbially Induced Calcium Carbonate Precipitation as Bio-Mimetics Material in Applications of Slashing Carbon Emission and Carbon Sequestration: A Review ]]>
<![CDATA[Ramadhani, Ramadhani]]>;
<![CDATA[Said, Ahmad]]>
<![CDATA[ Cipasung Techno Pesantren: Jurnal Ilmiah Vol 18 No 1 (2024): Cipasung Techno Pesantren: Scientific Journal ]]>
Publisher : <![CDATA[LPPM Sekolah Tinggi Teknologi Cipasung ]]>
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<![CDATA[Concrete production contributes radically to global carbon dioxide emissions. Microbially induced calcium carbonate precipitation (MICP) is an evolving technology that allows calcium carbonate to be precipitated on concrete through microbial metabolic activity. This review paper aims to present an overview of contemporary findings on the solicitation of MICP for advancing the properties of concrete, reducing carbon emissions from cement production, and elevating carbon sequestration. The results of previous studies have expounded that MICP treatment can enhance the compressive strength, stiffness, and durability of concrete. More importantly, MICP technology propounds the potential to moderately supersede cement content in concrete, thereby lowering carbon emissions from cement production. The microbial precipitated calcium carbonate may also accelerate the sequestration of carbon dioxide. While more research is still needed, MICP shows capacity as a sustainable technique for developing low-carbon concrete materials.]]>
<![CDATA[Development of Regulations on Factual Actions Post-Law on Government Administration: 2024 Election Process Dispute Study in Casu Prima Political Party ]]>
<![CDATA[Said, Ahmad]]>;
<![CDATA[Herawati, Ratna]]>;
<![CDATA[-, Sulistiani]]>
<![CDATA[ YUDISIA : Jurnal Pemikiran Hukum dan Hukum Islam Vol 15, No 1 (2024): YUDISIA : Jurnal Pemikiran Hukum dan Hukum Islam ]]>
Publisher : <![CDATA[Program Studi Hukum Keluarga Islam ]]>
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DOI: 10.21043/yudisia.v15i1.22110
<![CDATA[Factual actions in state administrative law have experienced developments after the issue of government administration law. This factual action is active in nature and is always preceded by a written decision from state administrative officials (TUN). However, in practice, factual actions involving written decisions are still subject to district courts accepting claims for unlawful acts (PMH) such as official decisions of state administrative officials (TUN) which are naturally the public law. This can be seen in the Jakarta District Court Decision Number: 757/Pdt.G/2022/PN which has punished the General Election Commission of the Republic of Indonesia (KPU RI) to postpone the General Election (Pemilu) and pay compensation. The aim of the research is to analyze the problems of the authority of written factual actions and to reformulate fair laws in the PTUN judicial system as well as the amount of awarded compensation procedures. Meanwhile, this research uses normative legal methods with statutory, conceptual and case approaches. The data collection method is by means of secondary data. The results of this research show that in the development of factual actions in state administrative law there has been an expansion of meaning to include written decisions, so that if there is a dispute over the election process between participants and the organizers of the General Election (Pemilu) then dispute resolution becomes the realm of absolute competence of the State Administrative Court (PTUN) after taking legal adjudication efforts at the Election Supervisory Body (Bawaslu). For this reason, in the future, legal reformulation efforts are needed regarding the expansion of the meaning of written decisions to also include factual actions contained in Law Number 51 of 2009 concerning PTUN, and changes to Government Regulation Number 43 of 1991 in the nominal amount of compensation awarded in PTUN according to real conditions regarding factual actions that give rise to PMH by the government.]]>
<![CDATA[Bank Indonesia's Strategy in Accelerating Sharia Economic Growth ]]>
<![CDATA[Said, Ahmad]]>;
<![CDATA[Susanto, Eko]]>
<![CDATA[ Journal of Islamic Economy Vol. 1 No. 3 (2024): NOVEMBER-JOIE ]]>
Publisher : <![CDATA[Pt. Anagata Sembagi Education ]]>
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DOI: 10.62872/1p7ps815
<![CDATA[Seconomy has become an integral part of the Indonesian economic system, especially after the implementation of policies that support the sustainability of this sector. In an effort to accelerate the growth of the sharia economy, Bank Indonesia (BI) plays an important role with various strategic policies implemented to strengthen this sector. The strategies implemented by BI not only include monetary policy, but also financial inclusion, development of the sharia capital market, and strengthening of sharia financial institutions. This study aims to explore more deeply the efforts of Bank Indonesia in encouraging the development of the sharia economy and its impact on overall economic growth. The research method used in this study is a qualitative descriptive approach with analysis of literature studies and relevant secondary data. Based on the analysis conducted, the strategies implemented by Bank Indonesia have proven effective in increasing the contribution of the sharia economy sector to Indonesia's Gross Domestic Product (GDP). Bank Indonesia, through comprehensive policies, provides significant impetus for the growth of the sharia economy, both in terms of macroeconomic policies and the real sector.]]>
<![CDATA[A REVIEW: FACILE AND GREEN SYNTHESIS OF MARINE MACROALGAE AND ITS PHOTOCATALYTIC PERFORMANCE ON POLLUTED WATER REMEDIATION ]]>
<![CDATA[., Ramadhani]]>;
<![CDATA[Said, Ahmad]]>
<![CDATA[ Journal of Aquatropica Asia Vol 9 No 1 (2024): Journal of Aquatropica Asia ]]>
Publisher : <![CDATA[Jurusan Akuakultur, Universitas Bangka Belitung ]]>
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DOI: 10.33019/joaa.v9i1.5245
<![CDATA[This review critically examines the burgeoning field of research focused on the environmentally benign synthesis of metallic nanoparticles exploiting the unique properties and diverse array of marine macroalgae species. Harnessing macroalgal biomolecules as reductants and stabilizers, numerous findings have discovered the biosynthesis of silver, gold, iron oxide, zinc oxide, and other nanoparticles through a sustainable "phycosynthesis" technique without toxic chemicals. Extensively characterized for their morphologies and properties, these algae-mediated nanoparticles exhibit notable photocatalytic activities in degrading various organic dyes and pollutants. Particularly, over 90% degradation efficiency has been achieved for dyes like methylene blue, methyl orange, and rhodamine B utilizing nanoparticles produced from macroalgae such as Sargassum horneri, Syringodium isoetifolium and Ulva lactuca. The mechanism is hypothesized to involve photoexcitation generating reactive oxidative species on the nanoparticle surface that rapidly cleave dye molecules. Improved understanding of the roles of macroalgal biomolecules and optimization of synthesis conditions may enable enhanced catalytic performances. With their widespread availability and biodiversity remaining largely untapped, marine macroalgae prove promising as renewable resources for developing eco-friendly water remediation technologies through metal/metal oxide nanocatalyst design.]]>
<![CDATA[Application of Major and Trace Elements for Detecting the Origin of Groundwater: Lithium Enrichment in Ain Al-Harrah Hot Spring Influenced by Red Sea, Saudi Arabia ]]>
<![CDATA[Umam, Rofiqul]]>;
<![CDATA[Cengiz, Korhan]]>;
<![CDATA[Said, Ahmad]]>
<![CDATA[ International Journal of Hydrological and Environmental for Sustainability Vol 3, No 3 (2024): International Journal of Hydrological and Environmental for Sustainability ]]>
Publisher : <![CDATA[CV FOUNDAE ]]>
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DOI: 10.58524/ijhes.v3i3.522
<![CDATA[Major and trace elements are valuable tracers for understanding the groundwater cycle. In groundwater flow path applications, these elements help delineate groundwater flow paths and identify areas of recharge and discharge. While in geothermal systems, the major and trace elements can indicate the contribution of deep hydrothermal fluids. In this study, we used major and trace elements as a groundwater tracer used to determine the origin of the Ain Al-Harrah hot spring in Saudi Arabia. Water sample data collection was taken from previous studies. In the data collection process, pre-washed 0.5 L polyethylene bottles were used to collect a total of five water samples from Ain Al-Harrah hot spring, Saudi Arabia. To prevent contamination, all samples were stored in a refrigerated room to maintain their chemical composition until the analysis process. The analytical results of the study showed that most of the hot water samples from Ain Al-Harrah hot spring, Saudi Arabia had been influenced by seawater which exceeded the limit value of x = 0.86 in the Na/Cl ratio. In addition, the value of y = 0.1 at the SO4/Cl ratio is the horizontal limit between the two. The interpretation of Cl against Cl/Li also confirms that the hot springs of Ain Al-Harrah, Saudi Arabia have been largely mixed with surface water. In addition, it is likely that the origin of the hot springs of Ain Al-Harrah, Saudi Arabia is also from seawater intrusion from red sea that has undergone mixing by meteoric water.]]>
