Lingkar: Journal of Environmental Engineering

COD REMOVAL PERFORMANCE USING MORINGA OLEIFERA SEEDS IN ABATTOIR WASTEWATER TREATMENT

2024-12-03T06:36:22+08:00

High COD levels in abattoir wastewater might cause negative impact to the environment, hence it must be lowered before being discharged into the environment. The seeds of moringa plant (Moringa oleifera) contains quite high levels of protein compounds, makes it potential as biocoagulant in coagulation-flocculation process for wastewater treatment. The objective of this research is to discover the potential of biocoagulant from moringa seeds powder in decreasing COD levels on abattoir waste water treatment. The research was performed with biocoagulant dose variations 0 g; 0.5 g; 1 g; 1.5 g; 2 g; and 2.5 g, utilizing rapid mixing at 120 rpm, and slow mixing at 30 rpm with duration 2 and 30 minutes respectively. The result showing that the optimum dose obtained at 2 g, with percentage of decreation by 93.97%. Based on the research, it is concluded that the biocoagulant derived from moringa seeds can perform effectively in COD removal of abattoir wastewater treatment.

PERFORMANCE EVALUATION OF SEWAGE TREATMENT PLANT USING BIOCHIP MEDIA IN MBBR TECHNOLOGY : CASE STUDY “X GARMENT, CENTRAL JAVA

2024-08-20T06:54:47+08:00

“X” garment industry’s Sewage Treatment Plant (STP) was built to treat domestic wastewater with an inflow capacity of 500 m³/day. The main principle of the STP technology is an attached growth process with Moving Bed Biofilm Reactor (MBBR) technology using biochip media. Wastewater treated at the STP must meet the water quality standards of Ministry of Environment and Forestry Regulation 68 of 2016 before being discharged into water bodies. Therefore, this research aimed to evaluate the “X” garment industry’s STP performance. Wastewater sampling was carried out at the inlet and outlet of STP. Water quality parameters analyzed included pH, BOD, COD, TSS, oil and grease, ammonia, and total coliforms. The removal efficiency value is obtained from the calculation of sampling results. The analysis showed that all treated water parameters met the water quality standards throughout the research period. Hence, the average removal efficiency value at the STP for each parameter was above 90%.

ASSESSMENT OF WATER QUALITY PARAMETERS AND THEIR CORRELATIONS IN THE KEMAMBANG RIVER, SIDOARJO, EAST JAVA PROVINCE: A ONE HEALTH FRAMEWORK APPROACH

2024-12-31T06:18:12+08:00

The river, a vital resource for agricultural, industrial, and domestic use, faces pollution pressures from anthropogenic activities. This study examines the water quality parameters of the Kemambang River in Sidoarjo, East Java, within the context of the One-Health Framework, emphasizing the interconnectedness of environmental, human, and animal health. Sampling conducted at three distinct points along the river revealed spatial variability in key parameters such as Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Dissolved Oxygen (DO), temperature, and oil and grease content. Analysis showed that while pH remained within acceptable limits, BOD and oil and grease levels exceeded regulatory standards, particularly downstream, where domestic and agricultural runoff contributed to oxygen depletion. Spearman correlation analysis highlighted strong positive correlations between TSS, COD, and oil and grease, while BOD and COD were negatively correlated with DO, underscoring the impact of pollutants on oxygen dynamics. These findings demonstrate how industrial and domestic activities compromise the river's ecological health, impacting human and aquatic systems. By adopting the One-Health Framework, this study provides a holistic perspective on water quality challenges, offering insights for targeted interventions and sustainable management practices.

ROOFTOP RAINWATER HARVESTING POTENTIAL AT BHARATHIAR UNIVERSITY

2025-03-06T20:32:09+08:00

Rapid urbanization, population growth, and climate change have escalated the demand for water resources, significantly widening the gap between water supply and demand. Among various strategies for water resource management, rainwater harvesting emerges as a sustainable and efficient solution. This study evaluates the rooftop rainwater harvesting potential of Bharathiar University Campus, Coimbatore, utilizing its 96,839 m² rooftop area as the catchment. Water demand for entire university was calculated by combining the supply of water to the use of all buildings, research laboratories and gardening from university water supply unit. The total rooftop rainwater potential was calculated combining total catchment area (m2), amount of rainfall (mm) and runoff coefficient. The analysis revealed that the campus rooftops could annually harvest 4,90,28,274 liters of rainwater. This harvested water has the potential to meet approximately one-fourth of the campus’s total water demand (13,36,91,625 liters), providing a viable strategy to alleviate water scarcity while reducing dependency on external water sources and groundwater extraction.

EVALUATION OF HAZARDOUS WASTE MANAGEMENT OF THE MANUFACTURING INDUSTRY IN PT. X

2025-02-20T20:27:14+08:00

PT. X is the largest viscose fibre manufacturing company in Indonesia. Production at PT X generates hazardous and toxic waste, potentially harming human health and the environment. The hazardous waste generated is oil, electronic waste, used batteries, tubular lamps, asbestos and rock wool, and hazardous packaging with the most significant quantity of WWTP (Wastewater Treatment Plant ) sludge and cellulose alkali. Exposure to high concentrations of cellulose alkali can cause acute poisoning and even death. This study aims to evaluate the management of hazardous waste by considering the Minister of Environment and Forestry Regulation No. 6 of 2021, the Minister of Environment and Forestry Regulation No. 14 of 2013 on symbols and labels of hazardous and toxic waste, and Government Regulation No. 22 of 2021 on the implementation of environmental protection and management, then the level of conformity is assessed using the Likert method. There are several aspects of hazardous and toxic waste management, namely aspects of reduction, packaging, collection, symbol and labelling, and temporary storage. The results of the suitability of hazardous waste management from the aspects of reduction are 100%, packaging is 88%, collection is 100%, giving symbols and labels is 71%, and storage is 96%; from the average overall result, a value of 91% is obtained and categorised as ‘very good’.