scholarly journals Kajian Sifat Fisika-Kimia Air Bahang dan Indeks Pencemaran di Perairan PLTU Sumbawa Barat

Kappa Journal ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 57-67
Author(s):  
Amirul Hilmi ◽  
◽  
Andi Maria Ulfa ◽  
Muh. Iman Darmawan ◽  
◽  
...  
Keyword(s):  
Water Temperature ◽  
Sea Water ◽  
Cooling Water ◽  
Chemical Properties ◽  
Pollution Index ◽  
Quality Standard ◽  
Hot Water ◽  
Sample Point ◽  
The Status ◽  
Control And Prevention

This research examines the physical and chemical properties of the potential contamination of condenser cooling water (heat water) at the 2x7 MW West Sumbawa Steam Power Plant. Method’s this research is direct observation in the field. The determination of the sample point was done by purposive sampling. The results showed that the hot water had met the predetermined quality standards, namely a pH of 8.21, a temperature of 38.50C and a content of free chlorine (Cl2) of 0.03 mg / L. There was an increase in sea water temperature in a radius of 17 meters east and west by 80C from 280C to 360C. Direct discharge of hot water has the potential to pollute the marine prawn environment around the 2x7 MW West Sumbawa PLTU. From the results of the study, it was found that the temperature of the hot water had met the specified quality standard, which was 40oC, but direct disposal caused the sea water temperature to rise, exceeding the set sea water temperature quality standard of 320C and the temperature increase should not be more than 20C from the temperature. at first. The status of sea water quality due to the entry of hot water is determined using a pollution index. From the calculation results obtained PIj of 1.125 at the sample point Outfall 2, meaning that the sea water conditions at a radius of 17 meters are lightly polluted. As a form of control and prevention of pollution due to the entry of high temperature hot water, continuous monitoring is necessary and it is necessary to create a mixing pool between sea water and hot water before the heat is discharged into the sea.

scholarly journals Analisis Kualitas Air dan Status Mutu Serta Beban Pencemaran Sungai Mahap di Kabupaten Sekadau Kalimantan Barat

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Ranty Christiana ◽  
Ika Muthya Anggraini ◽  
Hezliana Syahwanti
Keyword(s):  
Water Quality ◽  
Government Regulation ◽  
Pollution Index ◽  
Quality Standard ◽  
River Pollution ◽  
Sample Survey ◽  
Survey Method ◽  
Pollution Load ◽  
The People ◽  
The Status

<p>Sungai Mahap is used by the people of Nanga Mahap Village, Nanga Mahap District, Sekadau Regency for daily needs such as cooking, transportation and even consumption as drinking water. Utilization is done by the community because this area has not been flooded with clean water facilities. The quality and status of the Mahap River water quality standard needs to be further examined to study the feasibility of water as an air source used by the community regarding the importance of increasing plantation activities upstream. This research uses descriptive method using quantitative. Air sampling was conducted using a sample survey method with proposed parameters namely BOD, COD, pH, DO, TSS and NH3. Water quality testing is based on Government Regulation No. 82 of 2001 and determines the status of water quality using the STORET method and the pollution index based on the Decree of the Minister of Environment No.115 of 2003. In this study, the river pollution load was also calculated. The results show that the composition of BOD, COD, and Fe has exceeded the specified quality standards. The water quality status of the Mahap River is classified as moderate to severe based on the STORET method and Pollution Index. The highest river pollution load occurs at point II, in the dry season at 104.725 kg/day and in the rainy season at 171.873 kg/day</p>

scholarly journals DAMPAK PEMUKIMAN DAN KEGIATAN DI TEPI SUNGAI TERHADAP KUALITAS AIR SUNGAI BARU BARAT

2020 ◽  
Vol 26 (2) ◽  
pp. 49-60
Author(s):  
Ariane Pratiwi ◽  
◽  
Melati Ferianita Fachrul ◽  
Diana Irvindiaty Hendrawan ◽  
◽  
...  
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Waste Water Treatment ◽  
Pollution Index ◽  
Quality Standard ◽  
Quality Parameters ◽  
River Bank ◽  
Water Pollution Index ◽  
The Status ◽  
Almost All

Abstract. Baru Barat River is a man made river for flood and irrigation control. This study aims to determine the effect of activities on the bank on Baru Barat River on the water quality. Identification of activities is carried out along the bank of river. Water quality parameters are compared with the Governor of Jakarta no. 582 year 2005. The status of water quality is determined using the Pollution Inde (PI). The activities around the Baru Barat River are settlements, officem workshop, schools, deales, food stall, laundry, shops, beauty salons, guesthouses and gas station. BOD concentration range from 8.4-43.7 mg/L with a quality standard of 10 mg/L and COD range from 16-99.2 mg/L with a quality standard of 20 mg/L. Concentration of BOD and COD that exceed of quality standard at almost all sampling ponts. The level of pollutionj in the Baru Barat River is moderate polluted. The main problem at Baru Barat River are the presence of several illegal waste point left from activities that eventually enter the river and the absence of waste water treatment. The concept of community based must be implemented to waste management and communal wastewater treatment that are easy, inexpensive and integrated with the landscape. Keywords: Baru Barat River, river bank, water pollution index, river quality, domestic waste water

scholarly journals Analisis Kualitas Air dan Status Mutu Air Sungai Batang Asam Akibat Limbah Cair Kelapa Sawit Menggunakan Metode Indeks Pencemaran

2018 ◽  
Vol 1 (2) ◽  
pp. 41
Author(s):  
Siti Umi Kalsum ◽  
Lailal Gusri ◽  
Junardi Junardi
Keyword(s):  
Water Quality ◽  
Palm Oil ◽  
Pollution Index ◽  
Class Ii ◽  
Quality Standard ◽  
Water Supply Systems ◽  
Index Method ◽  
Oil Companies ◽  
The Status ◽  
Oil Wastewater

Batang Asam River as a source of raw water for Drinking Water Supply Systems (SPAM) and daily needs. On May 19, 2015 there was pollution in the Batang Asam River due to the spillage of palm oil wastewater from one of the palm oil companies around the Batang Asam River. The water river becomes smelly and black and many fish die. The initial testing  showed that BOD parameter = 10 mg / l), COD = 50 mg / l, TSS = 16 mg / l, N-Total = 3.86 mg / l, pH = 6.02, Oil and fat = 2.8 mg / l, where almost all parameters above the quality standard. The purpose of this study was to analyze status of water and water quality of Batang Asam River Using Pollution Index Method as a result of spilling palm oil wastewater.  Water sampling of the Batang Asam River was carried out in 4 (four) locations, namely the upstream area of Lubuk Bernai Village, the Central area of Lubuk Lawas Village and Tanjung Bojo Village and the downstream of Kampung Baru Village (Pengabuan River Estuary). Parameters tested were pH, TSS, TDS, BOD, COD, DO, Fe, Oil and fat based on Government Regulation Number 82 of 2001 concerning Water Pollution Control and Water Quality Management For Class II. Analysis of water quality status using the Pollution Index method based on the Minister of Environment Regulation Number 115 of 2003 concerning Guidelines for Determining the Status of Water Quality.  The results showed that the analysis of the average waterquality of Batang Asam River from four locations tested were parameters pH 6,8, TDS parameters 79,5 mg / l, TSS parameters 15,25 mg / l, DO parameters 3,025 mg / l, BOD parameters 2,935 mg/l, COD parameters 14,5 mg / l, Fe 0,645 mg / l and parameters of oil and fat 1 mg /l satisfy the class II water quality standard (PP No. 82 of 2001). The status of Batang Asam River shows that the status of water quality is mildly polluted with a pollution index value of 1,0 ≤ IP ≤ 5,0 which is 1,96.

KONDISI KUALITAS AIR (ASPEK MIKROORGANISME) DI PERAIRAN SEKITAR PULAU BUNAKEN, SULAWESI UTARA

2017 ◽  
Vol 5 (3) ◽  
pp. 94
Author(s):  
Roberto V Larat ◽  
Markus T Lasut ◽  
Robert A Bara
Keyword(s):  
Escherichia Coli ◽  
Sea Water ◽  
Liquid Waste ◽  
Quality Standard ◽  
Marine Biota ◽  
Sampling Point ◽  
E Coli ◽  
The Status ◽  
Comparison Table

In general, water conditions surrounding Bunaken Island are not separated from the liquid waste disposal, for example: bathing, washing, latrines, and landfills. Based on this, the research was conducted to determine the content of microorganisms Escherichia coli and coliform derived from liquid waste around Bunaken Island. The result showed the concentrations of E. coli were point (TS) I (<1 MPN / 100 ml), II (<1 MPN / 100 ml), and III (<1 MPN / 100 ml), and at the sampling point (TS) IV (1.0 MPN / 100 ml), V (1.0 MPN / 100 ml), and VI (1.0 MPN / 100 ml). Furthermore, coliform concentration has the similar valueat each sampling points (TS) I, II, III, IV, V, and VI with the amount of 2.0 MPN / 100 ml. The status around the Bunaken island on the comparison table between the this results and the standards of the Sea Quality Standard for Marine Tourism still qualifies or does not exceed the limits which stated in the creed of Minister ofEnviromental Affair Republic of Indonesia number 179 of 2004. Followed by Creed of Minister ofEnviromental Affair number 51 of 2004 on the Quality of Raw Water for Marine Biota, is categorized as the "proper" one of sea water quality for marine biota on the based ofEscherichia coli and coliform ratio.Keywords: Escherichia coli, coliform, air quality, Bunaken Island, North SulawesiPada umumnya, kondisi perairan yang berada di sekitar Pulau Bunaken tidak terlepas dari pembuangan limbah cair, misalnya : mandi, cuci dan kakus, serta tempat pembuangan sampah. Bertolak dari hal tersebut, penelitian ini dilakukan untuk mengkaji keberadaan kualitas limbah cair dalam aspek mikroorganisme di perairan sekitar pulau Bunaken dengan mengukur konsentrasi Escherichia coli dan coliform.Konsentrasi Escherichia coli berturut-turut pada titik sampling (TS) I (<1 MPN/100 ml), II (<1 MPN/100 ml) , dan III (<1 MPN/100 ml), dan pada titik sampling (TS) IV (1,0 MPN/100 ml), V (1,0 MPN/100 ml) , dan VI (1,0 MPN/100 ml). Coliformmemiliki jumlah konsentrasi yang sama, yaitu berturut-turut pada titik sampling (TS) I, II, III, IV, V, dan VI dengan jumlah 2.0 MPN/100 ml.Status perairan sekitar pulau Bunaken pada tabel perbandingan antara hasil pengukuran dan standart Baku Mutu Air Laut Untuk Wisata Bahari, masih memenuhi syarat atau tidak melewati batas yang ditetapkan dalam KEPMEN L.H. No.179 tahun 2004.Sedangkan berdasarkan KEPMEN L.H. No.51 Tahun 2004 tentang Baku Mutu Air Laut Untuk Biota Laut, berada dalam kategori “layak” sebagai peruntukan air laut untuk biota laut, berdasarkan parameter Escherichia coli dan coliform.Kata Kunci :Escherichia coli, coliform, kualitas air, Pulau Bunaken, Sulawesi Utara

Simulation and performance study of a two-bed adsorption cooling system operated with activated carbon-ethanol

2021 ◽  
pp. 095440622110420
Author(s):  
V Baiju ◽  
A Asif Sha ◽  
NK Mohammed Sajid ◽  
K Muhammedali Shafeeque
Keyword(s):  
Water Temperature ◽  
Performance Optimization ◽  
Cooling System ◽  
Cooling Water ◽  
Hot Water ◽  
Coefficient Of Performance ◽  
Cooling Power ◽  
Performance Study ◽  
Evaporator Temperature ◽  
Adsorption Cooling System

This paper presents the transient model of a two-bed adsorption cooling system performed in the SIMULINK platform. The inlet chilled water temperature in the evaporator, temperature of cooling water and hot water temperature of the adsorbent bed and its effect on systems coefficient of performance, refrigeration effect and specific cooling power have been studied and presented. It is observed that the systems coefficient of performance is 0.57 when the inlet hot water temperature about 80 °C. In this study, the optimum cooling power and systems coefficient of performance are also determined in terms of the phase time, shifting duration and hot water inflow temperature. The results indicates that the cooling water and hot water inlet temperatures significantly affects the coefficient of performance, specific cooling power and cooling power of the system. The effect of mass flow rate on the cooler efficiency is also presented. A two bed adsorption system of capacity 13.5 kW having an evaporator and condenser temperatures of 6°C and 28°C, respectively, are considered for the present investigation. The adsorbent mass considered is 45 kg with a shifting duration of 20 sec. The result of this study gives the basis for performance optimization of a practical continuous operating vapour adsorption cooler.

STATUS BAKU MUTU AIR LAUT PERAIRAN TELUK AMBON LUAR UNTUK WISATA BAHARI KAPAL TENGGELAM SS AQUILA

2017 ◽  
Vol 13 (2) ◽  
pp. 139
Author(s):  
Guntur Adhi Rahmawan ◽  
Wisnu Arya Gemilang
Keyword(s):  
Water Quality ◽  
Sea Water ◽  
Pollution Index ◽  
Quality Standard ◽  
Quality Parameters ◽  
Water Pollution Index ◽  
Marine Tourism ◽  
Seawater Ph ◽  
Water Quality Status

Ambon Bay waters consist of two parts, Inner Ambon Bay and Outer Ambon Bay separated by a gap that is narrow and shallow. Ambon Bay has a lot of functionality and usability both in transportation, conservation, and tourism. The existence of one of the sites SS. Aquila sinking ship that sank since May 27, 1958, became one of the tourist attraction diving in Ambon Bay. Determination of water pollution index Ambon Bay becomes very important to do as support material and development of sea travel. Determining pollution index is done by direct measurement using the sea water quality parameters Water Quality Checker (DKK TOA WQC Type-24), as well as laboratory analysis to determine the chemical parameters of seawater (pH, TSS, salinity, turbidity, oil, grease). The results showed that the waters of the Bay of Ambon Affairs based on some parameters water quality standard for marine tourism is still included in accordance with the standard criteria by Keputusan Menteri Negara Lingkungan Hidup Nomor: 51 Tahun 2004 on Guidelines for Determination of Water Quality Status.

scholarly journals Assessment of the physico-chemical properties of Oguta Lake compared to the established values of the Federal Ministry of Environment, Nigeria

2019 ◽  
Vol 10 (2) ◽  
Author(s):  
Felix Atawal Andong ◽  
Ngozi Evelyn Ezenwaji ◽  
Temitope Dadewura Melefa ◽  
Funmilayo Faith Hinmikaiye ◽  
Obiechina Vitus Nnadi ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Temperature ◽  
Chemical Properties ◽  
Aquatic Organisms ◽  
Quality Standard ◽  
Freshwater Ecosystems ◽  
Chemical Parameters ◽  
Physical And Chemical Parameters ◽  
Phosphate Nitrate ◽  
Physical And Chemical

Constant assessment of physical and chemical parameters in freshwater ecosystems is largely recommended. This is even more important when water resources, e.g. lakes in most countries, serve as a source of water for domestic and commercial purposes, and /or when freshwater ecosystems represent a refuge for most aquatic organisms. In this paper, we investigated the physical and chemical properties of water resources at three sampling stations of Lake Oguta, comparing the weekly values (June-July 2018) with the water quality standard established by the Nigerian Federal Ministry of Water Resources (FMWR). The parameters analysed included water temperature, pH, dissolved oxygen (DO), chemical and biological oxygen demand (COD, BOD), potassium, magnesium, sodium, calcium, phosphate, nitrate, chloride and sulphate. Most of the cations (calcium, magnesium and sodium), anions (phosphate, nitrate, chloride and sulphate), as well as water temperature, BOD and DO were below the quality standard limits. The basic chemistry and temporal variations may have been caused mostly by natural factors such as geology, topography, meteorology, hydrology, water levels and biological activity. Being in line with the recommended standard levels, the nutrient concentrations, pH and hardness in the current study may indicate favourable conditions for the life of aquatic organisms and contemporary co-existence with the human exploitation for drinking purposes. Nevertheless, to assure a safely and conscious exploitation of this water resource, we recommend continuity in the monitoring studies. To assure an accurate evaluation of the physical and chemical parameters, future studies should include a larger sample size and extended study periods (including other seasons).

Performance of an Absorber With Hydrophobic Membrane Contactor at Aqueous Solution-Water Vapor Interface

2010 ◽  
Vol 2 (3) ◽  
Author(s):  
Ahmed Hamza H. Ali
Keyword(s):  
Aqueous Solution ◽  
Water Vapor ◽  
Water Temperature ◽  
Cooling Water ◽  
Cooling Capacity ◽  
Hot Water ◽  
Membrane Contactor ◽  
Water Coolant ◽  
Hydrophobic Membrane ◽  
Vapor Interface

In this study, a detailed modeling of the heat and mass transfer processes inside a plate-and-frame absorber with hydrophobic microporous membrane contactor at aqueous solution-water vapor interface as a part of a chiller model is developed. The absorber is a component of a 5 kW cooling capacity single effect lithium bromide-water absorption chiller with a hot water thermally driven generator, a water-cooled absorber, and a condenser. The model is used to investigate the performance of the absorber in case the chiller operates at different values of the inlet driving hot water and cooling water (coolant) temperatures. The results clearly indicate that for the same cooling capacity of the chiller and compared with the performance at the design point value, increasing the inlet driving hot water temperature results in an increase in the required absorber size and consequently a decrease in the absorber performance, while decreasing the cooling water (coolant) inlet temperature leads to slight decreases in the required absorber size and consequently an increase in the absorber performance. The effect is prominent and can be used to decrease the absorber size for chillers work in places where the option of lower inlet coolant temperature is available with normal driving hot water temperature.

scholarly journals Real Air-Conditioning Performance of Ejector Refrigerator Based Air-Conditioner Powered by Low Temperature Heat Source

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 711
Author(s):  
Tongchana Thongtip ◽  
Natthawut Ruangtrakoon
Keyword(s):  
Heat Source ◽  
Thermal Comfort ◽  
Water Temperature ◽  
Test Performance ◽  
Air Conditioning ◽  
Cooling Water ◽  
Hot Water ◽  
Cooling Load ◽  
Air Conditioner ◽  
Comfort Condition

In this present work, the air-conditioning test performance of an ejector refrigerator-based air-conditioner (ERAC) was proposed. The ERAC was operated as the water chiller to produce the cooling load up to 4.5 kW. The chilled water temperature was later supplied to the fan-coil unit for producing the thermal comfort condition. The cooling water used to cool the condenser was achieved from the cooling tower which was operated under the hot and humid ambient. This is to demonstrate the feasibility of using the ERAC in real working conditions. The cooling load supplied to the air-conditioned space was applied by the air heater. The ERAC could efficiently be operated to produce the thermal comfort condition which was driven by the hot water temperature (Thot) of 90–98 °C. The system performance could vary with the heat source temperatures, cooling load, primary nozzle, and air-conditioned space temperature. The optimal performance was determined when varying the Thot, and, hence, the optimal Thot was indicated. The optimal Thot varied significantly with variations in the working condition. The test results demonstrated high potential to further using the ejector refrigeration system in the actual air conditioning application.

Total Bahan Organik dan Kualitas Air di Perairan Morodemak, Kabupaten Demak

2021 ◽  
Vol 10 (2) ◽  
pp. 205-212
Author(s):  
Ni Nyoman Widya Triyaningsih ◽  
Munasik Munasik ◽  
Wilis Ari Setyati
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Sea Water ◽  
High Tide ◽  
Organic Matter Content ◽  
Pollution Index ◽  
Quality Standard ◽  
Matter Content ◽  
Marine Biota

Perairan Morodemak merupakan daerah yang memegang peranan penting di Jawa Tengah sebagai daerah tangkapan dan pelelangan ikan serta kawasan padat penduduk. Namun penelitian mengenai kandungan bahan organik dan indeks pencemaran di lokasi jarang dilakukan. Tujuan penelitian ini untuk analisis Kandungan bahan organik dan indeks pencemaran serta  mengetahui kandungan bahan organik dan kondisi pencemaran di Perairan Morodemak Kabupaten Demak. Materi yang digunakan adalah air laut yang terdapat di sekitar Perairan Morodemak Kabupaten Demak. Sampel yang digunakan adalah sampel permukaan air yang diambil dengan botol Nansen kurang lebih pada kedalaman 1 meter. Metode penelitian yang digunakan adalah metode deskriptif dengan mengkaji kualitas perairan berdasarkan bahan organic di perairan Morodemak Kabupaten Demak. Pengambilan data secara in-situ kemudian dianalisa di laboratorium, serta analisis kualitatif indeks pencemaran dengan metode STORET yang dikeluarkan oleh Kementrian Lingkungan Hidup Republik Indonesia. Kandungan bahan organik di Perairan Morodemak adalah sebesar 15.01–15.94 mg/L untuk keadaan surut dan 19.96–21.67 mg/L untuk pasang. Dari kandungan bahan organik yang ditentukan, didapatkan hasil BOD5 dan COD sebagai parameter kualitas perairan sebesar 241.42–370.19 mg/L dan 515.117–792.191 mg/L. Kondisi Perairan Morodemak tergolong ke dalam perairan yang tercemar dikarenakan hampir seluruh parameter yang diujikan melewati batas baku mutu air laut untuk biota laut yang ditentukan oleh Kepmen LH No. 51 Tahun 2004 dan melewati indeks STORET dengan skor perairan > -31. Morodemak waters are an area that plays an important role in Central Java as a fishing and auction area as well as a densely populated area. However, research on organic matter content and on-site pollution index is rarely conducted. The purpose of this study was to analyze the organic matter content and pollution index and to determine the organic matter content and pollution conditions in the waters of Morodemak, Demak Regency. The material used is sea water that is around Morodemak Waters, Demak Regency. The sample used is a water surface sample taken with a Nansen bottle at a depth of 1 meter. The research method used is descriptive method by assessing the quality of the waters based on organic matter in the waters of Morodemak, Demak Regency. In-situ data collection was then analyzed in the laboratory, as well as a qualitative analysis of the pollution index using the STORET method issued by the Ministry of Environment of the Republic of Indonesia. The organic matter content in Morodemak waters is 15.01–15.94 mg / L for low tide and 19.96–21.67 mg / L for high tide. From the determined organic matter content, the BOD5 and COD results as water quality parameters were 241.42–370.19 mg / L and 515,117–792,191 mg / L. The condition of Morodemak waters is classified into polluted waters because almost all the parameters tested have exceeded the sea water quality standard limit for marine biota determined by the Minister of Environment Decree No. 51 of 2004 and passed the STORET index with a water score of> -31.

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