Settling Pond Research Articles

SEARCH FOR METHODS TO INCREASE THE SEDIMENTATION RATE OF THE UPPER FLOATING LAYER OF OIL SLUDGE PITS

Traditionally, oil sludge with a liquid-viscous consistency is separated into petroleum product, water and solid mechanical impurities. A large number of technological devices, including separators, centrifuges, hydrocyclones of various designs, have been developed to carry out the operation of interfacial separation of liquid-viscous oil sludge.On the territory of every oil refinery that has been in operation for decades, there are oil sludge ponds — natural settling ponds in which large quantities of oil waste accumulate.The problem of processing barn oil sludge in the oil production and refining industry has not yet been completely solved. This is due to the high stability of barn emulsions, the peculiarities of their composition and properties, which are constantly changing under the influence of temperature and various processes occurring in them.The article presents the results of research aimed at identifying the possibility of destruction of a persistent oil-water emulsion taken from the upper floating layer of an oil sludge pit and its preparation without changing the technological scheme and technological parameters.The results of laboratory studies on the destruction of oily liquid during static sedimentation are considered. Simulation of the oily liquid preparation process was carried out in compliance with the temperature and time conditions of operation, with the use of demulsifiers, by analogy with the process of oily liquid preparation, as at the unit. The results of the simulation showed that at the dosage of the demulsifiers used at the unit, even with an increase in the dosage and an increase in the settling time to 5 days, the oil-water emulsion did not collapse at 60 0C. Further studies were carried out by testing eight brands of demulsifiers at different dosages and elevated temperatures. Based on the results of the research and the conclusions made, a scheme for the preparation of oil-containing liquid at static sludge with the existing set of equipment at the unit is proposed.Further studies were carried out to increase the depth and sedimentation rate of the persistent oil-water emulsion.

DAYA TAMPUNG SETTLING POND TERHADAP BEBAN PENCEMARAN TOTAL SUSPENDED SOLID DARI LIMBAH BATUBARA PT. JORONG BARUTAMA GRESTON

The impact of the mining process including the emergence of Total Suspended Solids (TSS), either directly or indirectly can disrupt the life of aquatic biota, damage environmental sustainability, and threaten the welfare of humans who depend on the water for various daily purposes. To reduce the burden of pollution on water bodies due to coal mining waste, one of the technologies often chosen is the Wastewater Management Plant (WWTP) system, which generally involves the use of settling ponds. This study aims to analyze the total suspended solids in the settling pond, analyze the total suspended solid capacity, and compile recommendations for total suspended solid management efforts to meet environmental quality standards. The total suspended solids (TSS) values in October and November measurements at the inlet were 339.00 mg/l and 712.00 mg/l while the outlet decreased to 42.50 mg/l and 55.00 mg/l. The total suspended solid (TSS) value during the measurement period of January – December 2023 shows that the TSS value at the inlet and outlet for 12 months shows a value below the quality standard. The first settling pond with a capacity of 15,000 m, and the second to sixth settling ponds have a capacity of 3,000 m3 each. To maintain the capacity of the settling pond at around 60% of its maximum capacity, the volume of TSS deposited ranges from 9,000 m3, while in the second to sixth settling ponds, the volume of TSS deposited each ranges from 1,800 m3.

A review of the benefits and limitations of waste nutrient treatment in aquaculture pond facilities

AbstractManaging waste nutrients from intensive freshwater and marine pond aquaculture is a global challenge. Nutrient‐enriched water released from farms can have detrimental effects on aquatic ecosystem health. There are a range of treatment options for discharge water from fish and crustacean ponds, and this review examines the benefits and limitations of these options. Much of the nutrient waste is derived from the addition of formulated feed. In recent years, reduction in waste from feeds and feeding has been largely incremental. In terms of treatment, there are low‐cost approaches, such as settlement ponds, but they are inefficient at reducing nutrients. Biological systems, using aquatic plants, microalgae and filter feeders to reduce nutrient release from farms have variable levels of effectiveness. Establishing wetlands requires considerable additional land area, and success to date has been highly variable. Overall, this review found no simple cost‐effective solution for managing nutrient enriched water from ponds. This is due, in many cases, to challenges with treating the large volumes of discharge water with relatively low nutrient concentrations. This means that more technologically advanced and reliable treatment options, for example, bioreactors, are prohibitively expensive. However, some systems, such as use of recirculation systems typically increase nutrient concentrations, and hence the efficiency and effectiveness of more expensive treatment methods. Biofloc systems can also provide a mechanism for in‐situ nutrient treatment as well as a supplementary food source for animals. Overall, there is scope to improve treatment of waste nutrients, but significant modifications to many production systems are needed to achieve this.

Utilizing a settling pond-based constructed wetland for the treatment of shrimp aquaculture wastewater – From laboratory to field scale: A case study in Ben Tre Province, Vietnam

The shrimp aquaculture industry, while bringing high economic benefits, simultaneously presents many environmental challenges for many countries, including Vietnam. Our survey results regarding shrimp farming management in 30 representative rural households within Ben Tre province have revealed that 96.7% of wastewater does not meet the allowable standards. Although approximately 76.66% of which is crudely treated by settling ponds, the percentage of substandard wastewater is reduced only to 70%. Unfortunately, >93% of the wastewater is discharged directly into the environment. Faced with that situation, a proposed wastewater treatment option suitable for the rural areas is to utilize settling ponds and indigenous reeds (P.australis and P.vallatoria) to build constructed wetlands (CW). A lab-scale CW was designed to mimic a settling pond on the surveyed farm, which was scaled down to a ratio of 1:500, aiming to validate the efficacy of the CW approach. Accordingly, the P.vallatoria-planted CW with a density of 25 roots/m2 effectively treats the wastewater to meet the permissible standard within 4 weeks. The removal efficiencies of organics, nutrients, heavy metals, and total coliform could reach up to 80, 85, 91, and 41%, respectively. Upon transitioning to the field scale, these efficiencies increased up to 13.09, 18.79, 29.47, and 5%, respectively. More importantly, the treatment time could be shortened to 3 and 2 weeks, respectively, when the wastewater is diluted 1.5 and 3 times, thereby serving as a foundation to upgrade the current farming model from intensive to super-intensive.

The effect of heavy metal-containing wastewater sediment on the microanatomical characteristics of the leaves and stem of Salix viminalis L.

A comparative microanatomical study of Salix viminalis L. shoots was performed in order to get an idea of the effect of toxic elements stress on the microanatomical parameters of the shoot (leaves, stem). The examined Salix viminalis L. shoots originated from the Lovász-zug suburban area of Debrecen city, where a sewage settling pond was formerly operated as a secondary biological purification unit. The control Salix triandra x viminalis L. 'Inger' samples originated from the Nyíregyháza experiment with uncontaminated soil. As a result of our research, we can state the following in the case of the leaf samples grown on contaminated soil: the leaf lamina thickness decreased; the extent of the palisade parenchyma decreased; the extent of the intercellular spaced increased inside the spongy parenchyma; the width and the height of the main veins increased; the extent of the collenchyma bordering the main vein increased; the stomatal density increased both in the case of the adaxial and abaxial epidermis; the size of the stomas decreased. In the case of the stem samples, we observed the following: in the case of the samples grown on contaminated soil the extent of the primer cortex increased; the cell wall of the cells building the sclerenchimatic fibers thickened; the number of Ca-oxalate crystal rosettes and sclereids increased; the extent of secondary phloem increased; the lumen of the tracheas in the secondary xylem increased; the average width of the annual rings decreased; the extent of the central stele of the stem increased.

Effect of comparison ratio of additives on changes in pH levels, TSS, Fe, and Mn metals in the acid mine water treatment process at KPL BB 13 PT bukit asam, tbk.

Mining activities with an open system at PT Bukit Asam Tbk. have the potential to produce acid mine drainage due to contamination by rocks with sulfur content. Acid mine drainage treatment is carried out by the active method in the Mud Settling Pond (KPL). Addition of alum (Al2(SO4)3) and quicklime (CaO) to increase pH levels and reduce water turbidity. Management is carried out to meet environmental quality standards, namely with a pH value of 6-9, a maximum TSS value of 400, and for Mn and Fe a maximum of 4 and 7 mg/L, respectively. Jar Tests were conducted on samples from KPL BB-13 with mixed doses of alum and quicklime used were 0.02 and 0.10 grams; 0.03 and 0.12 grams; 0.04 and 0.14 grams; 0.05 and 0.16; 0.06 and 0.18; and 0.7 and 0.20. The best test results are at a mixed dose of 0.02 grams of alum and 0.10 grams of quicklime to obtain a pH value of 7 (neutral), besides that TSS and Fe metal levels have decreased. Mn metal also decreased, but did not meet environmental quality standards. Increased doses for field scale under actual conditions of observation required alum as much as 1.00 g/s and quicklime as much as 5.0052 g/s. The evaluation results show that the acid mine drainage treatment carried out by the company is more effective and efficient than the dose of laboratory test results.

Optimized Drainage System Design for Andesite Mining at PT. Rolas Nusantara Tambang, Kejayan, East Java

This study presents a systematic approach to designing a filtration system aimed at efficiently managing rainwater and surface runoff outside mining areas. Utilizing a quantitative method, the data collection predominantly involves secondary sources. The data is processed through a series of steps: rainfall projection, delineation of rainwater catchment areas, calculation of rainfall intensity and inflow rate, and determination of open channel and settling pond dimensions. The designed open channels have a trapezoidal shape with specific dimensions including a base width of 0.51 m, a side length of 0.62 m, a slope angle of 60°, and a channel depth of 0.54 m. These channels span a total length of 2.216 m. The accompanying settling ponds are rectangular with dimensions encompassing a length of 31 m, a width of 11 m, a depth of 6 m, and an area of 341 m². These ponds have a volume capacity of 2,046 m³, achieving an impressive 90.89% efficiency. Notably, maintenance of the settling pond involves periodic dredging using the Kobelco SK200 Excavator at intervals of roughly 16 years (5,817 days). Given that this maintenance duration surpasses the expected mine lifespan, no further interventions are required for the pond during the mine's operational period.

Geoelectric Monitoring of Earthen Hydraulic Structure State by Resistivity and Induced Polarization Methods: Mine Water Settling Pond Dam Case Study

In earth dams, a permanent filtration of water leads to washing out of sand-clay fraction and to a formation of soil decompression sites, which pose a danger to embankment integrity. Condition monitoring of earth hydraulic structures can be executed by geophysical methods. The article presents the results of geoelectric monitoring conducted on the dam of settling pond of mine water with high metal content. The investigations were carried out by vertical electrical soundings, including electrotomography, and by methods of induced polarization in time and frequency domains. According to the results of the electrical soundings, places of reduced soil resistivity in the dam were identified, associated with infiltration of precipitations and of water from the pond. Geoelectric monitoring showed changes of the soils resistivity in different years, depending on hydrological conditions. Induced polarization methods are sensitive to material composition of soils, such as clayiness and presence of electronically conductive minerals. It is determined that the highest content of clay is in the upper and middle parts of the embankment. In eastern part of the dam, intensive polarizability of the medium was detected. It can be caused by filtration of water, contaminated with metals, through the embankment and sedimentary rocks. Thus, by resistivity measurements, it is possible to identify areas of intensive filtration in the dam body, and induced polarization measurements make it possible to determine clay content in the soil and possible pathways of contamination through the dam, which is of great importance for studying the environmental situation of region.

ANALISIS PENURUNAN KADAR LOGAM BESI (Fe) & MANGAN (Mn) DENGAN PENGGUNAAN KOAGULAN TERHADAP AIR TAMBANG BATUBARA PT. ADARO INDONESIA

The purpose of writing this study is to analyze the influence of coagulants to reduce the levels of dissolved metals Iron (Fe) & Manganese (Mn) from coal mine water The place of the study is in the operational area of the PT. Adaro Indonesia in Tabalong and Balangan Regencies, the object of the study of mine water samples was taken at the Settling pond (SP) X inlet located in the Wara mine area. This research was conducted with an experimental method, namely the Jar Test test with an experimental design compiled in a Non-Factorial Group Randomized Design (RAK) consisting of 6 (six) treatments with 3 repetitions. The analysis method carried out to determine the influence of coagulants on the decrease in Fe and Mn metal levels is to use the Anova and Tukey (BNJ) analysis method. The results of this study from all the treatments that have been carried out on coagulants in the study, the coagulants that have the greatest influence in reducing Fe metal levels are the use of coagulant Y with a combination of treatments with an increase in water pH (caustic soda Y) combined with fast and slow stirring (D1) of: 0,002 mg/L, treatment with an increase in water pH (caustic soda Y) combined with rapid stirring (D2) by: The 0,002 mg/L data analysis with the anova and tukey BNJ tests differed from other treatments. The coagulant that has the greatest influence in reducing Mn metal levels is the use of coagulant Y with a combination of treatment with an increase in water pH (caustic soda Y) + auxiliary coagulant Y combined with rapid mixing (F2) of: 2,509 mg/L, treatment with an increase in water pH (caustic soda Y) + auxiliary coagulant Y combined with slow mixing (F3) of: 2,518 mg/L.

Algal settling ponds contribute to final effluent quality of integrated algal pond systems for municipal sewage treatment

AbstractAppropriate wastewater technologies and sound management are crucial to global water quality and conservation. The integrated algal pond system (IAPS), considered an efficient, passive and low‐cost wastewater treatment technology for peri‐urban spaces, is perceived to yield a final effluent unsuitable for discharge. Experiments were carried out to challenge the prevailing perception that algal‐based wastewater treatment processes and in particular IAPS produce an effluent that does not always meet national and/or regional regulatory standards. Formation of a microalgal–bacterial floc (MaB‐flocs) and settleability together with biomass removal from algal settling ponds (ASPs) is shown to reduce total suspended solids (TSS) from >50 to <20 mg L−1. Thus, production of a readily settleable MaB‐floc coupled with removal of settled biomass from ASP ensures that final effluent TSS remains below the general limit of 25 mg L−1 and yields an effluent suitable for either irrigation or discharge.

Mass Balance and Dissolved Metal Loads in the Mamut Copper Mine Temporary Settling Pond

Mining activities which involve certain sulphide bearing minerals generally produce acid mine drainage. The understanding of the characteristics of dissolved metals before they are discharged into streams is important for environmental management. This study focuses on a small water reservoir in the former Mamut Copper Mine, known locally as the Temporary Settling Pond (TSP). The main objective of this study is to estimate the mass balance and load of dissolved metals in the acid mine drainage (from the mine pit to the TSP). Water sampling and discharge measurements were done during baseflow and high flows using water level sensors and dataloggers. The analysis of dissolved elements in water samples was done using ICP-OES, while sulphate was analysed using a ‘HACH’ spectrometer kit. Through the mass balance method, Fe had the highest removal rate followed by Cu, Al, Zn and Mn. The highest dissolved metal load discharged from the TSP was Al followed by Mn, Cu, Zn and Fe.

Improving the clarification quality of industrial wastewater by acoustic method

The gravity clarification method is relatively effective only for extracting coarse suspended particles from industrial wastewater. The removal of medium and fine suspended and colloidal particles and heavy metals at respective treatment facilities requires their preliminary aggregation by chemical, physical, or combined methods, with the use of additional sorbent filters. Irregular removal of bottom sediments results in secondary pollution of industrial wastewater with mineral particles and heavy metals retained by the sediments. In poorly treated industrial effluents, fish die within a few weeks. The key factor, in this case, is the dispersion rather than concentration of suspended solids in the water. The method proposed involves coagulation of finely dispersed suspended solids, colloidal particles, and insoluble heavy metals and their forced settling with simultaneous compaction of bottom sediments in acoustic fields (not only in horizontal settling tanks, but also directly in local and main water sumps of open pits and mines). The paper presents examples of successful application of the integrated acoustic method in the sumps of pits and mines at diamond and gold mining enterprises of the Russian Federation in 2015–2022. The average underground dewatering efficiency (in local and main mine dewatering) is shown to be 82.1 %, which is 20–22 % higher than the surface dewatering efficiency (via the settlement pond and two filter channels) of the mine water clarification facility.

Studi Kualitas Air Kolam Ikan Air Tawar di Balai Benih Ikan Sentral Masni, Kabupaten Manokwari, Provinsi Papua Barat

Water quality parameters in pond include ammonia, nitrite, nitrate, phosphate, BOD, DO, turbidity, temperature, and pH. It is important to know the concentration of each component to properly minimize the negative impacts of their disturbances for the overall water quality and the biota in it. This study aims to determine the concentration of ammonia, nitrite, nitrate, phosphate, BOD, DO, turbidity, temperature, and pH in freshwater fish ponds at the Central Fish Seed Office (BBIS) of Masni, Manokwari Regency, West Papua Province. The study was conducted in May 2017, representing the rainy season, and August 2017, representing the dry season. Water samples were taken from settling, rearing, hatchery, and brood ponds. Meanwhile, standard method was implemented in the component measurements. The study results show that the concentrations of ammonia, nitrite, nitrate, and phosphate were 0.02-0.18 mg/L, 0.00-2.00 mg/L, 0.40-1.00 mg/L, and 1.01-21.83 mg/L, respectively. Furthermore, the concentrations of BOD and DO were 6.12-8.19 mg/L and 7.30-12.00 mg/L, respectively. Finally, the values ​​of turbidity, temperature, and pH were 0.40-9.99 NTU, 26-30°C and 7.7-8.5, respectively.

Nitrogen removal performance, and microbial community structure of water and its association with nitrogen metabolism of an ecological engineering pond aquaculture system

The ecological engineering pond aquaculture system was promoted in China in recent years as it can save water and reduce pollution. In the present study, an ecological engineering pond aquaculture system was established, consisting of a drainage ditch, a settling pond, an aeration pond, a filter dam, eco-ponds, and fish ponds for tilapia farming. Water from different ponds were sampled and sequenced by Illumina sequencing, and then the microbial communities were analyzed. The metabolic activity of bacteria in the water samples was tested using Biolog EcoPlates. The concentrations of total nitrogen (TN), ammonia-nitrogen (NH4-N), nitrate-nitrogen (NO3-N), nitrite-nitrogen (NO2-N), and total phosphorus (TP) in water after treatment by the system were 0.71 ± 0.19, 0.48 ± 0.15, 0.51 ± 0.21, 0.03 ± 0.01, and 0.04 ± 0.01 mg/L, respectively. All the units of the system could remove TN in water. Proteobacteria, Actinobacteria, Cyanobacteria, Bacteroidetes, and Planctomycetes were the dominant phyla in the water of the system. The genera Candidatus Aquiluna and Dechloromonas positively correlated with the microbial metabolic activity of organic nitrogen and NH4-N concentrations in water, which could be the functional bacteria for nitrogen removal. Several genera showed positive correlation with the TN and NH4-N concentrations of water and were probably involved in nitrogen cycling of the system. Our data indicated that the ecological engineering pond aquaculture system notably improves water quality and alters the microbial populations. The results supply substantial information on the functional microbiota for nitrogen removal from freshwater aquaculture ecosystems.

Analysis of Erosion Management Based on GeoWEPP Spatial Modeling on Bauxite Mining Activities PT. XYZ in West Borneo

Bauxite ore open-pit mining activities are conducted in spread areas and increase the potential for water pollution, implying a need for good management. GeoWEPP is a spatial model that predicts the erosion magnitude and the location of sedimentation. This helps in erosion management and control, including constructing a settling pond. Therefore, the purpose of this study was to examine GeoWEPP based on land use, topographic and soil maps, as well as rainfall and temperature data. The results showed that 30 hills with a total area of 13 602.48 Ha obtained sediment of 150 186 m3/month and the amount of run off of 4 202 267 m3/month. Furthermore, GeoWEPP analysis on the planned mining block area obtained 30 outlet points to be used as the location for the settling pond construction. The optimistic and pessimistic cost of constructing the entire settling pond is Rp. 222 047 640 944 and Rp. 222 773 049 768, respectively. Additionally, the cost of settling pond maintenance at all outlet points during operation is Rp. 3 139 414 818. Planting cover crops in ex-mining areas is very effective in reducing erosion.

Optimizing Hydraulic Retention Time and Area of Biological Settling Ponds for Super-Intensive Shrimp Wastewater Treatment Systems

Biological settling ponds are a practicable approach for treating super-intensive shrimp aquaculture wastewater for almost all shrimp producers in the Vietnamese Mekong Delta (VMD). The optimization of the hydraulic retention time (HRT) of biological settling ponds plays a crucial role in establishing the stability of outflow wastewater quality and suitability of the settling pond area (SPA). This study aims to suggest appropriate HRT and SPA for super-intensive shrimp wastewater treatment systems based on the National Standard (QCVN 02-19:2014/BNNPTNT) and the best aquaculture practices (BAP) standards and guidelines. We investigated 20 typical super-intensive shrimp farms in the VMD and collected effluent samples from siphoning process, daily water exchange, and outflow of biological effluent-treatment settling ponds. The results showed that the average of each super-intensive shrimp farm produced wastewater at approximately 218 m3 ha−1 day−1. The contaminant loads of TSS, COD, TKN, and TP were commensurate to 177, 113, 9.86, and 4.19 kg ha−1 day−1, respectively. Based on the relationship between outflow COD, TSS concentrations, and HRT of biological-surveyed settling ponds, a 13.4-day HRT and 1934-m2 SPA were suggested to optimize the super-intensive shrimp wastewater treatment systems. Our recommendation for further work is to continuously optimize the HRT and SPA rates of functional ponds (anaerobic, facultative, and maturation) to ameliorate the engineering configuration of the recommended biological settling pond.

Applicability of bio-synthesized nanoparticles in fungal secondary metabolites products and plant extracts for eliminating antibiotic-resistant bacteria risks in non-clinical environments

The abundance of antibiotic-resistant bacteria in the prawn pond effluents can substantially impact the natural environment. The settlement ponds, which are the most common treatment method for farms wastewater, might effectively reduce the suspended solids and organic matter. However, the method is insufficient for bacterial inactivation. The current paper seeks to highlight the environmental issue associated with the distribution of antibiotic resistant bacteria (ARB) from prawn farm wastewater and their impact on the microbial complex community in the surface water which receiving these wastes. The inactivation of antibiotic-resistant bacteria in prawn wastewater is strongly recommended because the presence of antibiotic-resistant bacteria in the environment causes water pollution and public health issues. The nanoparticles are more efficient for bacterial inactivation. They are widely accepted due to their high chemical and mechanical stability, broad spectrum of radiation absorption, high catalytic activity, and high antimicrobial activity. Many studies have examined the use of fungi or plants extract to synthesis zinc oxide nanoparticles (ZnO NPs). It is evident from recent papers in the literature that green synthesized ZnO NPs from microbes and plant extracts are non-toxic and effective. ZnO NPs inactivate the bacterial cells as a function for releasing reactive oxygen species (ROS) and zinc ions. The inactivation of antibiotic-resistant bacteria tends to be more than 90% which exhibit strong antimicrobial behavior against bacterial species.

Contamination of the Dzheltulak-1 river basin under alluvial gold mining (the Amur region)

The purpose of the introduced research is to study the environmental impact of placer gold mining. The object of the study is natural and natural-man-made geosystems of the Dzheltulak-1 river located in the Amur region. The content of the main cations and microelements in water samples was determined by atomic emission and mass spectral methods. The content of micro- and rock-forming elements in bottom sediments and soils was determined by X-ray fluorescence using XRF-1800 X-ray spectrometer (Shimadzu, Japan). The results of the conducted studies indicate that the contents of iron, manganese, copper, aluminum, vanadium, molybdenum, mercury and ammonium ions exceed commercial fishery standards in a significant part of the surface water samples. It is found out that settlement ponds negatively affect the water quality in the river Dzheltulak-1 downstream due to the dam drainage. The highest concentrations of dissolved forms of mercury were noted in the water of the settlement ponds. The gross content of arsenic in the samples of bottom sediments and soils exceeds sanitary and hygienic standards by 2.7–14.5 times. The distributions of mercury as the most dangerous pollutant among the biogenic components of geochemical landscape were worked out in detail. Mercury contamination of soils was classified according to the forms of mercury occurrence: free, physically sorbed, chemisorbed, sulfide and isomorphic. It has been shown that the free form is characteristic of fresh mercury contamination due to the use of prohibited technological schemes for gold-bearing sands separation by the amalgamation method.

Application of Water Quality of pH and TSS Monitoring Using Online Monitoring at Settling Pond of Coal Mining Company PT XY

The existence of an Online Monitoring System is very important to know in real time the changes in water quality at Settling Pond so that it can immediately take action to maintain the quality of water from the settling pond always comply with the required environmental quality standards without errors resulting in mine closure and criminal sanctions. To face this challenge, a system needs to be developed that can monitor real time output water settling ponds, so that early warning can be provided if the settling pond requires special handling, to the team in charge. Currently water quality monitoring is still done manually, namely by doing water sampling and quality testing manually. This stage uses at least 12 teams to supervise 18 active, controlled settling ponds 24 hours and 7 days a week. In the implementation there were quite a number of challenges faced, apart from the fact that the Settling Pond location was quite far away so that it took quite a long time to reach the location. The applicable laws and regulations state that mine water management must not exceed the required environmental quality standard (BML) so that fast information is needed to be able to know water quality. Keywords: Online Monitoring System, Water Quality DOI: 10.7176/JIEA/11-2-03 Publication date: April 30 th 2021

Evaluasi Sistem Penirisan Tambang di PT Vitrama Properti Desa Air Mesu Kabupaten Bangka Tengah

PT Vitrama Properti applies mine dewatering system by making open channel. The open channel got silting because many solid particles have deposited causing the mine road become flooded. The method used is quantitative method by evaluating and analyzing dewatering system. The data taken is in the form of coordinate data, actual discharge, channel dimensions and the time for sediment deposition on settling pond. Catchment area is 42.4 ha. Based on the calculation of rainfall data and rainfall analysis with the gumbell method, the maximum planned rainfall value is 183.9 mm/day with a rain intensity is 63.75 mm/day, the maximum total discharge is 156,193.92 m3 /day or 1.8078 m3 /day. The surface width of the new channel is 1.7 m, the bottom width is 0.5 m and height is 1 m. The new settling pond dimension have total design volume of 3,292.5 m3 . The time for dredging the sediment material in the settling pond is every one or two years when the sediment material in compartment one has deposited as much as 60% of settling pond volume