Water Management

 

Gold mining operations require substantial amounts of water, making responsible water management essential to maintain quality and availability while preventing pollution. To minimize the negativeimpacts of water extraction, we regularly evaluate water discharge rates, monitor surface water quality, wastewater quality, and aquatic biota.

 

We has conducted an inventory of its water sources. A water audit was carried out in 2024 at the Bakan mine site.

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Water Sources and Usages

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J Resources utilizes various water sources depending on the operational location. The head office relies on third-party providers to meet office water needs. The Bakan Mine uses river water for office and employee housing needs, as well as for plant irrigation and cleaning purposes. The Doup Project

and the Seruyung Mine utilize river or surface water for domestic purposes. At the Doup Project, we operate a water treatment facility using Reverse Osmosis (RO) technology for consumption purposes.

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At the Penjom Mine, we utilize water collected from multiple sources stored in ponds for both operational and domestic activities. Meanwhile, at the Lanut Mine, we rely on raw spring water for daily consumption and plant irrigation.

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Before being utilized for production activities and utility/domestic purposes, river water goes through several treatment processes, such as coagulation, flocculation sedimentation, filtration, and disinfection. This process refers to Permenkes No. 02 of 2023 which regulates drinking water quality standards, as well as water for hygiene and sanitation purposes.

 

Several Water Efficiency Initiatives:

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1. Implementing a recycling system with a closed-loop circuit in the process plant.

2. Applying a polishing pond as the final stage of water treatment.

3. Utilizing rainwater for dust control in mining areas.

4. Using water-saving showers in employee accommodations.

5. Installing eco-flush systems to replace conventional toilets across all Company facilities.

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Effluent Management

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Effluent planning is conducted before mining activities commence. Once mining operations are underway, we perform hydrological analyses to determine the catchment areas and the required size of sediment ponds to effectively manage runoff from mining and production activities.

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We manage industrial runoff by detoxifying and neutralizing effluent through sedimentation ponds, detoxification ponds, and final settling ponds to ensure it meets the required quality standards, before discharging into natural water bodies. In addition to managing industrial wastewater, we also treat domestic wastewater at our wastewater treatment facilities (WWTP), using a seven-stage process within an anaerobic biofilter sewage treatment plant (STP) to meet government quality standards before releasing it back into the water bodies.

 

At the Bakan Mine, we have introduced an innovative approach to liquid waste treatment by utilizing ozon (O3) in the detoxification process. This process effectively reduces Free Cyanide (CN-) content with an efficiency rate of up to 73% (meeting the environmental quality standard of CN- < 0.5 ppm), while also reducing reagent consumption, specifically hydrogen peroxide by 58% and sodium sulfide by 95%. Overall, this initiative has resulted in annual cost savings of 48%.

 

Acid Mine Drainage

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Mining activities generate waste rock, which consists of material that does not contain sufficient gold to be processed. This waste rock contains sulfide minerals, and when exposed to water and air, chemical reactions can occur, forming sulfuric acid. As a result, acid mine drainage (AMD), which is highly corrosive, can develop.

 

AMD can cause widespread damage to water sources, soil, ecosystems, infrastructure, and human health. Therefore, careful planning is essential to prevent AMD from negatively impacting the environment and communities.

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Quality Monitoring

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To ensure responsible water and effluent management, we conduct daily monitoring of industrial wastewater, covering parameters such as pH level, flow rate, and total suspended solids (TSS). Monthly effluent monitoring is carried out in collaboration with an accredited environmental laboratory. Additionally, quarterly water body sampling is conducted to identify potential water pollution risks.

 

Our daily and monthly liquid waste management activities are designed to ensure that all effluent discharge complies with the quality standards required under the Decree of the Minister of Environment No. 202/2004 for mining and processing waste, and the Regulation of the Minister of Environment and Forestry No. P.68/Menlhk/Setjen/Kum.1/8/2016 for domestic waste.