ABSTRACT Indonesia ranks 8th as the largest food waste-producing country in the world, with an annual generation of 14.73 million tons. The high amount of food waste can significantly contribute to climate change, as greenhouse gas emissions from food waste reach 4,051.5 kgCO₂e per ton. This study aims to determine the generation and composition of food waste from the canteens of the Faculty …
ABSTRACT ABSTRACTABSTRACT Rapid population growth and industrial expansion in Marpoyan Damai District Pekanbaru City have led to a significant increase in solid waste generation disposed at the Muara Fajar Landfill. Limited waste reduction capacity at the sub-district level remains a critical issue and is projected to worsen annually. To address this challenge, the development of a Material Re…
ABSTRACT Food waste is the highest component of solid waste generated in Indonesia, and improper management contributes significantly to greenhouse gas emissions. One major source of food waste is the food service sector, including the canteens of the Faculty of Engineering (FT) and the Faculty of Economics and Business (FEB) at the University of Riau. This study aims to analyze food waste gen…
ABSTRACT Activities of street vendors in the Riau Main Stadium Area, Pekanbaru City, generate various types of waste, notably biomass waste comprising sugarcane bagasse and corn cobs. The generation rate of this biomass waste reaches 117.2 kg/day of sugarcane bagasse and 12.5 kg/day of corn cobs. The carbon content within this biomass waste can be utilized as renewable energy in the form o…
ABSTRACT The rising quantity of automobiles has resulted in a heightened need for engine lubricating oil, which has an impact on the increasing amount of used oil waste. Used oil is classified as B3 waste that has the potential to pollute the environment if not managed properly. One way to manage it is by refining used oil into an alternative diesel fuel. This is because used oil still con…
ABSTRACT Used car oil will cause various problems if it is not managed properly. This is because used oils contain a variety of hazardous components such as heavy metals and carcinogenic substances. This study aims to look for optimal conditions for refining used engine oil into alternative fuels, specifically focusing on combining the Acid and Clay methods with distillation. The methodolo…
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…