ABSTRACT Medical waste incineration in hospitals may release microplastic particles into the atmosphere. Microplastics are plastic particles ranging from 1 μm to 5 mm in size, characterized by their light weight, ease of dispersion, and potential risks to human health and the environment. This study aimed to analyze the abundance, types, and polymer composition of airborne microplastics a…
ABSTRACT Siak River water has a high natural organic matter (NOM) content, which has the potential to form disinfection by-products in the form of trihalomethanes (THM) when it reacts with chlorine. THM are carcinogenic and have fatal impact on human health, so treatment is necessary before disinfection. This study aims to calculate the efficiency of organic and color removal in Siak R…
ABSTRACT The Siak River, a source of raw water for Pekanbaru City Water Company, contains organic matter content and high water color. Organic matter content in river water will produce THM when disinfected with chlorine, so it is necessary to treat organic matter before disinfection. This study aims to calculate the efficiency of organic matter and color removal and determine the optimal…
ABSTRACT Sago bark has potential as an alternative raw material for environmentally friendly bioenergy, with the potential bio-pellets from sago bark capable of producing a calorific value of around 4,855 kcal/kg, thus meeting the biomass pellet standard for energy. This study aims to analyze the effect of co-firing variation of sago bark biomass pellets based on SNI 8951:2020, to assess t…
ABSTRACT Riau Province is one of Indonesia’s main producers of pineapple and coconut, with annual production reaching hundreds of thousands of tons. Processing these commodities generates large amounts of waste in the form of pineapple peel and coconut pulp, which, if not managed properly, can potentially cause environmental pollution. One promising solution is bioconversion using Black …
ABSTRACT The Tangkerang River flows through source areas such as markets, settlements, hospitals, and hotels, which contribute wastewater that poses risks if discharged directly into the water body without prior treatment. This study aims to assess pollutant loads and carrying capacity using the Qual2Kw and WASP (Water Quality Analysis Simulation Program) models. The Qual2Kw model was appl…
ABSTRACT The use of environmentally friendly materials in construction is an important consideration in efforts to reduce waste, particularly plastic waste that is difficult to decompose. This study aims to investigate the effect of using LDPE (Low Density Polyethylene) plastic waste on the characteristics of paving blocks, particularly in terms of compressive strength and water absorption…
ABSTRACT Tenayan Industrial Estate has various anthropogenic activities such as industrial and population activities, many activities can affect the amount of pollutants in the air, one of which is microplastics. Microplastics can be distributed through the air due to the influence of meteorological factors. This study aims to analyze the abundance of microplastic particles in the air arou…
ABSTRACT Chromium Hexavalent (Cr(VI)) is a type of waste that is carcinogenic and persistent in the environment. One method that can be used to remove Cr(VI) metal is the biosorption method, which utilizes microalgae immobilized with sodium alginate to achieve a stable structure. This study aims to obtain optimum conditions and empirical models for Cr(VI) removal and optical density using …
ABSTRACT Methylene blue synthetic dye is carcinogenic, toxic, and flammable so it needs to be processed before being discharged into the environment. In this study, methylene blue was processed by biosorption method using immobilized Chlorella sp. microalgae (Immobilized Microalgae Beads / IMB). This study aims to obtain the optimum variables and empirical model of IMB in the removal of me…
ABSTRACT Ammonia in wastewater can harm aquatic environments due to its toxicity, with LC50 values of 0.56–2.36 ppm for fish and 1.10–22.8 ppm for invertebrates within 24–96 hours of exposure. It contributes to eutrophication, microbial death, and reduced dissolved oxygen levels. Conventional are still limited, especially under high ammonia concentrations. Therefore, this study appli…
ABSTRACT Phenol is a toxic aromatic compound commonly found in industrial wastewater and has the potential to pollute aquatic environments. Treating phenol poses a challenge due to its resistance to biological degradation, high solubility in water, and its carcinogenic and bioaccumulative nature. Therefore, an effective and environmentally friendly treatment method is required. . One of th…
ABSTRACT Wastewater often contains pollutants such as ammonia, which can disrupt ecological balance. This study aimed to determine the optimum conditions, develop an empirical model, and characterize Immobilized Microalgal–Bacterial Beads (IMBB) for ammonia removal using Response Surface Methodology (RSM). The IMBB were formed by immobilizing microalgae Chlorella sp. and bacteria Nitros…
ABSTRACT The rise in traffic density in urban regions presents a threat of microplastic emission into the atmosphere. Road dust now contains microplastics, which are plastic particles that range in size from 0.001 to 5 mm. Due to their little weight and ease of airborne suspension, these particles have the potential to lower air quality and endanger human health. This study is to examine t…
ABSTRACT PKS. X in Tapung is one of the strategic business units in supporting the production of crude palm oil (CPO). One of its main operational units is the engine room station equipped with a Genset, Back Pressure Vessel (BPV), Turbine, and Main Panel. This unit produces noise levels that exceed the Threshold Limit Value (NAB) of 85 dB(A), thus risking hearing loss in workers. This stu…
ABSTRACT The PT. X Palm Oil Mill is one of the palm oil producers in Riau. In its oil processing activities, this factory emits NO2, SO2 and Particulate emissions from the boiler chimney, furnace, and generator. In order to prevent the impact of these emissions, dispersion modeling needs to be carried out using the AERMOD View application consisting of AERMET and AERMAP. The purpose of thi…
ABSTRACT Global warming caused by increased concentrations of greenhouse gases (GHGs) requires mitigation efforts from various sectors, including the office sector. This study aims to identify and analyze the carbon footprint generated from the direct and indirect activities of the Head Office of PT Bumitama Gunajaya Agro, located in South Jakarta. The method used refer…
ABSTRACT Implementation of development on a project scale has great potential for environmental damage to occur. The building and construction sector contributed approximately 32% of global energy consumption and 34% of energy-related carbon dioxide (CO2) emissions in 2023. There has been an increase in the average daily temperature of at least 0.74ºC per year over the past two decades with t…
ABSTRACT Oyster mushroom baglog waste can produce 1 to 2 tons of waste in one harvest cycle. This waste has a fairly high lignocellulose content so that it has the potential to be used as a basic material for making activated carbon. This study aims to determine the effect of variations in NaOH activation concentration on the adsorption capacity of activated carbon from baglog waste in rem…
ABSTRACT Petroleum spills on soil can cause significant environmental impacts and pose a great danger to humans and other living things. Petroleum is a hazardous and toxic material so that petroleum contaminated soil needs to be managed properly. Bioremediation is the most efficient process in degrading petroleum in soil by utilizing microorganisms. Microorganisms require nutrients C, N, and P…