Sriwijaya Journal of Environment
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Reusing Coal Waste as a Blending Material for Hollow Block Production to Boost Circular Economic of FABA
Full text linkIn the world and Indonesia, coal is one of the primary fuel sources for steam power plants (PLTU). This is due to the shrinking and increasing prices of fuel oil. With the abundance of coal energy sources, it continues to be used as the primary energy source for power plants in Indonesia. The economic efficiency obtained can reach 80% compared to the use of solar. However, Fly ash and Bottom ash (FABA), or solid waste produced from the coal combustion process at the PLTU, contains many inorganic minerals, which can pollute the environment, such as air and soil pollution. Conventionally, regarding economic law, Construction and Demolition (C and D) in the circulation system between materials and products must have zero material value and no longer produce residual waste in final disposal. This research implements Circular Economy (CE) to minimize the negative impact of FABA on the environment at PLTU. The experiment used FABA Coal as a mixed material to make Hollow Blocks with six combinations of sizes. The results obtained, the greater the percentage of FABA used, can minimize production costs and improve the quality of hollow blocks. From an economic cost analysis, using FABA for mixed materials for open block production will provide 55% greater economic benefits and 34.67% higher quality Hollow blocks compared to the composition of materials without FABA mixture
Existence of Phytoplankton in Waters Affected by Hot Water of Electric Steam Power Plant (ESPP) of Teluk Sirih as Ecological Bioindicator Reference for Climate Change Mitigation
Full text linkElectric Steam Power Plant (ESPP) in Teluk Sirih located on the seafront will certainly have an impact on changes in environmental factors such as physical, chemical and biological, one of which will be affected is phytoplankton. The research objective was to study the community structure of phytoplankton in the waters affected by the hot water of the ESPP of Teluk Sirih which was carried out in August 2023 with four sample stations namely Outfall, Inlet, Jetty and the middle of the sea as controls. The results of the study showed that the community structure of phytoplankton in the waters around the PLTU of Teluk Sirih was not significantly affected by hot water. This is illustrated by the diversity results which are classified as well H' ranging from 1.710-2.156. Evenest Index (E) 0.562-0.761 and Dominance Index (C) 0.188-0.295. The E and C values show that the phytoplankton are evenly distributed and no species dominates the ESPP of Teluk Sirih. The physics and chemistry of water are all above the quality standards of Ministry of Environment No. 51. 2004 as temperature ranges from 29-320C, pH 7-8, brightness >3m, Salinity 31,4-32,2 mg/L. Dissolved oxygen 5 mg/L, Carbon dioxide 48-62 mg/L, BOD5 4-5 mg/L, Nitrates 0.02-0.031 mg/L and orthophosphate 0.014-0.018.Keywords: Hot water, Phytoplankton, ESPP of Teluk Sirih, Community Structure and Physical Chemical Factor
The Use of Chemicals and Recycled Oil Palm Plantation Production Waste and Impact on Groundwater Quality
Full text linkThe use of wetlands for oil palm plantation is associated with a negative impact on the environment. Meanwhile, oil palm plantation plays a crucial role in supporting the social economy of the community. This study aimed to analyze the productivity of private oil palm plantation in wetlands and the impact on groundwater quality. The experiment was carried out by calculating the amount of production mathematically and taking groundwater samples to be tested in the laboratory. Data were obtained on the amount of PH, BOD, COD, DO, NO3-N, NH3, Cd, Cu, Pb, Zn, CI, and SO42 in groundwater. The results showed an increase in FFB production of up to 42.44%, but there was a change in groundwater quality. Water quality decreased due to an increase in the amount of BOD 312.31%, NO3-N 23.95%, NH3 100%, Cd 166.67%, Cu 433.33%, Pb 200%, Zn 3.800%, Ci 1,672.59%, and SO42 16.19%. Based on the results, it is necessary to increase the amount of compost used while reducing the application of inorganic fertilizers and recycled materials left over from PKS production. Pesticides and herbicides should be used effectively according to standard requirements
Effluent Quality Monitoring in Industrial Waste Water Treatment at PT. X
Full text linkPT. X is an industry that produces waste from the main product manufacturing process and production residues. The waste produced is waste water. The purpose of carrying out this activity is to identify the sources and characteristics of waste water, know the waste water treatment system, know the results of waste water quality tests, and analyze the results of monitoring the quality of waste water. This activity is carried out by literature study, field observation, and primary data collection as well as secondary data. The results of this activity found that the source of waste water came from process waste water and cooling water. Data on the quality of waste water outlets used in 2022. The quality standards used are based on Minister of Environment and Forestry No. 19 of 2010, Governor Regulation No. 08 of 2012, and Palembang Mayor License No. 658.31 / IPLC / 0015 / DPMPTSP-PPL / 2020. Effluent monitoring at PT. X is tested monthly. The monitoring results of the effleunt liquid waste treatment at PT. X is observed to be still below the quality standards that have been set by safe funds to be discharged into water bodies
Maintenance Management on Prospective Duck Grouper (Cromileptes altivelis) in Aquaculture at BPBAP Situbondo
No full textDuck grouper (Cromileptes altivelis) is a type of commercial fish that has a habitat on coral rocks. Duck grouper is widely consumed both domestically and abroad. Duck grouper (Cromileptes altivelis) has profitable business opportunities even though not many have cultivated it. Maintenance management of prospective duck grouper parents is one of the efforts in aquaculture to get superior quality. This activity aims to find out how and stages of maintenance for prospective grouper parents in aquaculture. This activity was carried out at the Brackish Water Aquaculture Fisheries Center (BPBAP) Situbondo. The methods used in this activity are interviews, observation, documentation, and active participation and using secondary data in the form of journals and books. Management of the breeding of prospective duck grouper parents (Cromileptes altivelis) is carried out by the stages of pond preparation, filling water in the pond, soaking prospective duck grouper parents with fresh water, stocking prospective grouper parents in aquaculture ponds, feeding, cleaning ponds, and changing water circulation. Water quality measurements were carried out three times in each week FCR results during the activity with a total of 224 fish amounting to 8.46. This activity is carried out in ponds using seawater according to its natural habitat with temperatures of 27° C, pH ranging from 8.19-8.22, salinity 34 ppt, nitrite levels ranging from 0.009-0.02 ppm, and ammonia levels ranging from 0.005-0.022 mg / L. Prevention efforts against sea leech parasites are carried out twice a month using fresh water and acriflavine
Roadside Environmental Quality Estimations for Particulate Matter 10 (PM10) in Akure-South LGA, Ondo State, Nigeria
Full text linkTransportation serves as a vibrant sector for current civilization without which commerce, industrialization and societal development will be slowed or impossible, however, movement in space is not without its negative outcome, part of which is the generations of particulate. Objective of this research is to analyses Particulate Matter 10 (PM10) on roadside in Akure-south LGA of Ondo State, Nigeria. Traffic movement were collected along these corridors with the aid of counting and then disaggregating them into various categories such as passenger cars, heavy trucks, motorcycles and buses, while, CLJ-D Particulate counter (100-1million (PCS) Brand) was used in collecting PM10 particles generated along the traffic corridor. Finding show that the highest PM10 generated along the corridor is 1019 µg/m3 and the least generated PM10 is 312 µg/m3, while the corridor with the highest traffic is with 3973 pcu/hr and the lest has 1299 pcu/hr traffic volume. The research concluded that although the traffic volume is not exclusively the only contributor to PM10, in the selected corridor, there could also be some other contributors as the areas generating highest traffic movement do not mean highest PM10
Diversity of Soil Insects in Coal Post Mining Land of PT. Bukit Asam Tbk in Tanjung Enim
No full textCoal mining activities carried out openly can have a negative impact on the environment. One of the environmental damages that occurs is the loss of habitat for soil-level insects. This research was conducted to identify the diversity of soil surface insect species in post-coal mining land of PT. Bukit Asam Tbk Tanjung Enim IUP Banko Barat at various ages of reclamation. Soil surface insect samples were collected using the pitfall trap method which was carried out for 1x24 hours. The results showed that the highest presence of soil surface insect species occurred in aged 6 years with a total of 128 individuals and was dominated by the order Hymenoptera. The species diversity index in post-coal mining land aged 6 years, namely 1.51, is classified as moderate. The lowest presence of soil surface insects occurred in aged 2 years with a total of 24 individuals. The species diversity index in post-coal mining land aged 2 years, namely 0.85, is relatively low. Thus, the research results show that the diversity of surface soil insects is influenced by the age of reclamation. The longer the land is managed, the higher the index of diversity of soil surface insect species in post-coal mining land
Carrying Capacity Analysis for Measuring Land Capability in Arid Area
Full text linkThe study of sustainable development in an area must include environmental carrying capacity (ECC). Measurement of environmental carrying capacity is needed to determine the limits of an area's ability to support individual behavior, such as consumption of natural resources and disposal of waste into nature. This study aims to evaluate the ECC analysis based on land capability in dry areas in East Nusa Tenggara as a contribution to spatial planning strategies. The results of this study show that Timor Tengah Selatan Regency, which is dominated by dry areas, has a land capability classification ranging from class I to III, or as much as 42% of the total area that can be exploited for agricultural and plantation activities. This research can be used as input for the 5-year revision cycle of the Timor Tengah Selatan Regency spatial plan so that land allocation in the RTRW is more in line with the land's carrying capacity
Oxoplastics, Bioplastics, and their Potential of Microplastics Generation (Case Study: Indonesia)
Full text linkPlastics are still becoming popular topic in public news. This was initiated by some sea-animals that was trapped by plastic straws, plastic fishing net, and the other plastic packaging. This plastics problem are starting to become global issue and escalate the awareness of people to reduce the plastics use. Some campaign of reducing plastic use are varied, such as starting a zero-waste lifestyle, banning plastics bags, and the other solution is using degradable plastics. Unfortunately, some of the degradable plastics just become a label and only part of greenwashing product. With the increasing issue of microplastics, this degradable plastics is still seen to be skeptical from some academic perspective. The other solution that becoming popular is using biodegradable plastics or bioplastics. This bioplastic is said to be a better option because it is made from natural substrate that easily degrade, edible, and claimed to be safer for the environment. But this claim is still need further research and also standardization of biodegradability definition. This review will provide about the definition of biodegradable plastics, the differences between oxoplastic and bioplastics; the implementation of bioplastic or oxoplastic product in Indonesia, and issue related to microplastic generatio
Reinforcement of Bearing Capacity Foundation using Single Soil Column Method Fixed Diameter 3.2 cm with Calcium Carbide Residue (CCR) and Rice Husk Ash (RHA) Mixed Materials
Full text linkSoil reinforcement method is one of the efforts to improve the technical properties of soil, such as soil bearing capacity, compressibility and permeability. The soil column method is one of the alternatives to improve physical properties by stabilization to improve soil bearing capacity. This research aims to increase the bearing capacity of the sole foundation by using the soil column method with a mixture of clay, 3% calcium carbide residue (CCR) and 12% Rice Hush Ash (RHA). This research was conducted experimentally in the laboratory using clay test specimens taken from Padamaran Village, OKI, South Sumatra Province, which were put into a test box with 1 m x 1 m x 1.4 m dimensions. The soil column modelling in this research used the soil column method. The soil column modelling in this study used a single column variation with a diameter of 3.2 cm with lengths of 40 cm, 46 cm, and 53 cm, respectively. The results are the clay foundation plate's ultimate soil bearing capacity (qu) before and after reinforcement with the soil column method. The bearing capacity of the footprint foundation plate on the largest clay soil occurs in the soil column variation with a length of 40 cm and a diameter of 3.2 cm, where the bearing capacity of the clay soil, which was originally 140 kPa increased to 21 kPa. In the experimental results of the loading test, the longer the column, the bearing capacity of the column decreases, which may have something to do with the slenderness factor of the column. The slimmer the column, the smaller the compressive strength of the column so that the tendency of the column to bend/collapse becomes greater. It happens because slender columns not only accept axial forces but also consider the addition of secondary moments due to the slenderness of the column. Then, the column cannot withstand the shear load due to the compacted clay soil around the column