scholarly journals HIGH-PERFORMANCE MICROPOROUS MEMBRANES IN TECHNOLOGIES OF SEA WATER PURIFICATION

2018 ◽  
Vol 59 (7) ◽  
pp. 75
Author(s):  
Andreiy V. Desyatov ◽  
Nataliya E. Kruchinina ◽  
Alekseiy M. Landyrev
Keyword(s):  
Reverse Osmosis ◽  
Water Purification ◽  
High Performance ◽  
Sea Water ◽  
Optimal Dose ◽  
Quality Parameters ◽  
Specific Productivity ◽  
Industrial Plants ◽  
Average Value

Now the microfiltration are widely used for treatment of surface waters (sea, river) from the fine suspended solids, colloidal and organic compounds including their preparation for reverse osmosis desalination and for purification of waste and water processing at the creation of closed systems of water use. The process of water purification using microfiltration elements of roll type on the basis of micro porous membranes with cylindrical pores of 0.2 microns size at laboratory and industrial plants was studied. The technology for pretreatment of water prior to microfiltration by coagulant dosing to increase the specific productivity of microfiltration elements and the quality of the filtrate was proposed. The optimal dose of ferric chloride coagulant and the time of contact with water and water quality parameters (color, turbidity, total iron content, the index of density of sediment) were determined. The resulting indicators of the quality of the filtrate for water at input of the reverse osmosis systems were: the average value of the filtrate turbidity - 0.2 NTU, the average SDI15 value -3.5. The obtained high value of specific performance in working mode was 260 l/ (m2×bar×h)( average value).

scholarly journals Problems of water supply of the population and application of the method of electrolysis-structural activation for partial solution

2018 ◽  
Vol 193 ◽  
pp. 02019
Author(s):  
Ludmila Prikhodko ◽  
Galina Bryukhanova ◽  
Ekaterina Beljakova
Keyword(s):  
Water Supply ◽  
Reverse Osmosis ◽  
Arid Regions ◽  
Sea Water ◽  
Partial Solution ◽  
Global Scale ◽  
Membrane Technology ◽  
Saline Groundwater ◽  
Desalinated Water

We analyzed the problems of water supply for the population of global scale and regional importance. A method for the electrolysis-structural activation of water oriented on the use of initial fresh rainwater or desalinated membrane technology of sea water in a mix with biologically purified household sewage waters. This method can be used on sea vessels, in arid regions of the planet, and in areas with saline groundwater. Activation of water is achieved by mixing biologically purified wastewater obtained by technology that ensures the quality of purified water at the level of requirements for release in a fishery pond and desalinated water (rainwater) or obtained by reverse osmosis in a ratio of their volumes not more than 10:1

Surface Modification of Composite Membranes by Coating PVA/TiO2 Layer

2015 ◽  
Vol 804 ◽  
pp. 299-303
Author(s):  
Baturalp Yalcinkaya ◽  
Jiri Chaloupek
Keyword(s):  
Waste Water ◽  
Reverse Osmosis ◽  
Metal Ion ◽  
Sea Water ◽  
Composite Membranes ◽  
Aluminum Production ◽  
Filtration Process ◽  
Ion Rejection ◽  
Reverse Osmosis Membranes

Water pollution comprises all of those compounds that change the quality of groundwater and surface water, therefore reducing the suitability of natural water for human use and other vital processes. These compounds result from human activities, especially those that are industrial, agricultural and domestic.The polyamide thin film composite reverse osmosis membranes become important in desalination of sea water and brackish water or waste water. However the polyamide reverse osmosis membranes tend to fouling due to their hydrophobic and rough surfaces. In this study flux and rejection of waste water from aluminum production industry were obtained during filtration process by using modified commercial composite membranes. Amount of fouling was evaluated with unmodified and modified membranes. Rejection of iron particles and PH of feed and permeate solutions were determined after filtration process. Results shows that modified membranes were performed higher metal ion rejection and antifouling performance than unmodified membranes.

scholarly journals KAJIAN MUTU BAKSO IKAN TUNA YANG DISUBSTITUSI TEPUNG KARAGENAN

2020 ◽  
Vol 8 (1) ◽  
pp. 30
Author(s):  
Moon Ayu Kawanari Sitepu ◽  
Hanny Welly Mewengkang ◽  
Daisy Monica Makapedua ◽  
Lena Jeane Damongilala ◽  
Eunike Louisje Mongi ◽  
...  
Keyword(s):  
Water Content ◽  
Quality Parameters ◽  
Plate Count ◽  
Average Value ◽  
Randomized Design ◽  
Fish Product ◽  
Storage Times ◽  
And Storage ◽  
Total Bacteria

Fishball is a fish product that knows for their distinctive taste and chewy texture. The quality of fishball greatly affects the attractiveness of consumers to consume it, regarding the taste and aroma. The ingredients of fishball that have properties as an emulsifying is  carrageenan. The purpose of this study was to determine the quality of tuna fishballs substituted with carrageenan flour with different concentrations and storage times. The treatment design used was RAL (completely randomized design) which consisted of 4 different concentration treatments of added carrageenan, for 0%, 1%, 2% and 3% with 2 days of storage and 2 times repetition. The quality parameters were organoleptic test, water content, pH and TPC (Total Plate Count). The results showed that the addition of carrageenan affected the water content and pH of fishballs. Tuna fishballs with the addition of a concentration of 2% are the best products with an average value of organoleptic values: 6.58; water content: 71.63; pH: 5.46; and TPC: 2.6 × 10 4. Water content in fishballl is not met SNI quality requirements. Total bacteria (TPC) in fishballs met SNI quality requirements.Keywords: tuna fishballs, carrageenan

Sorption and Membrane Technologies for Mine Water Purification

2019 ◽  
Vol 946 ◽  
pp. 621-627
Author(s):  
Konstantin L. Timofeev ◽  
Vasilii Kurdiumov ◽  
Gennady Maltsev
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Water Purification ◽  
Mine Water ◽  
Large Scale ◽  
Potable Water ◽  
Water Hardness ◽  
Membrane Technologies ◽  
Large Scale Tests

The importance of the research is due to the lack of potable water (~1.6 million m3 per year) in a rapidly developing city in the Urals. One way to solve this problem is to purify water from the spent copper mine with a debit of ~4.4 million m3 of water per year. The most advanced techniques recently used for obtaining drinking water of a high quality are based on ion exchange and reverse osmosis, which can ensure an obtainment of water with initial contents of impurities much below the maximum permissible values. Based on the real experience the article compares sorption and membrane technologies in terms of water purification efficiency and cost of potable water production. The large-scale tests of mine water purification were carried out at sorption and reverse osmosis pilot plants with the capacity of 1 m3 per hour for the incoming flow. The source water had the following composition, mg/dm3: 0.5–0.9 Mn; 1.0–1.7 Ni; 80-140 Ca; 30-40 Na; 40-70 Mg; 0.2–0.6 Cu; 8.1–9.5 Si; 0.01–0.03 Zn; 0.01–1.70 Fe; <0.01 Al; < 0.005 As; < 0.005 Pb. At the same time the salinity was 640–680 mg/dm3, the water hardness was 9.5–11.5 mmol/dm3 and pH was 7.0-7.5. The content of non-mentioned impurities was below the detection limit. The resulting treated water met the requirements for the quality of potable water for both purification techniques. It was concluded, that the best option for treatment of mine water is ion exchange.

scholarly journals Assessment of Seawater Intrusion into Shallow Coastal Aquifer in Kanyakumari District, Tamilnadu, India

2020 ◽  
Vol 9 (3) ◽  
pp. 3006-3014
Keyword(s):  
Seawater Intrusion ◽  
Sea Water ◽  
Magnesium Carbonate ◽  
Research Area ◽  
Quality Parameters ◽  
Shallow Aquifer ◽  
Quality Of Water ◽  
Random Samples ◽  
Calcium Magnesium

Improved use of groundwater is often causing intrusion of seawater. The intrusion of seawater also takes place in coastal areas. In this analysis, the distribution and the levels of intrusion in the research area (Kanyakumari district, Tamilnadu, India) are determined. The test was done using random samples at a period of 15 days in which 30 different samples were taken in 5 different locations with a certain distance from the seashore, then chemical analysis including pH, electrical conductivity (EC), total dissolved solids (TDS), chloride, sodium, calcium, magnesium, carbonate, and bicarbonate water quality parameters were carried out. Chloride Bicarbonate Ratio was used for the calculation of the penetration rate of the seawater, and subsequently chloride and electric conductivity were defined as type and quality of water characters. The results showed that the shallow aquifer was intruded by seawater at several sample levels, which was included in the normal to high intrusion classification. The sea water intrusion was classified as freshwater to saltwater, the concentrations in chloride ranged from 159 to 6021 mg / L. The ratio of bicarbonate chloride was 0.28 to 21.46, normally above 15.5, indicating that groundwater was disturbed. As a result, in comparison to standards or other seawater intrusion indicators, Rajakamangalam-well 1 (RM-W1) has been affected by seawater intrusion highly.

scholarly journals Évaluation de la qualité des noix de cajou (Anacardium occidentale L.) produites dans le département de Korhogo en Côte d’Ivoire

2021 ◽  
Vol 15 (3) ◽  
pp. 1030-1049
Author(s):  
Adama Coulibaly ◽  
Mohamed Doumbouya ◽  
Komissiri Dagnogo ◽  
Atchoumtcho Sara Coulibaly ◽  
Ouattara Salifou Gboko ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Quality Parameters ◽  
Cote D’Ivoire ◽  
Average Value ◽  
Côte D'ivoire ◽  
General Average ◽  
Average Defect ◽  
Determining Factor

La qualité des noix brutes de cajou est un facteur déterminant dans la fixation de leurs prix d’achat et de vente. L’objectif de cette étude est d’évaluer la qualité des noix de cajou afin de contribuer à l’amélioration des traitements post-récoltes desdites noix et la revalorisation des revenus des planteurs. Sur 208 échantillons du département de Korhogo, les paramètres de qualité ont été déterminés selon la norme ivoirienne PNI 4595. La valeur minimale des taux d’humidité moyens est 5,6±1,4% tandis que la valeur maximale est 5,8±1,8% avec une moyenne globale de 5,7±1,8%. Les grainages moyens sont 182±13 noix/kg, 179±13 noix/kg, 180±15 noix/kg, 179±12 noix/kg et 181±12 noix/kg respectivement pour les zones 1 ; 2 ; 3 ; 4 et 5 avec une valeur moyenne de 180±13 noix/kg. Concernant les taux de défauts moyens, ils varient entre 11,96±4,59% et 13,90±5,65% avec pour moyenne générale 13,10±5,08%. Les valeurs de l’out-turn oscillent entre un minimum de 44,87±3,65 lbs et un maximum de 45,90±2,62 lbs avec une moyenne globale de 45,42±2,78 lbs. Les proportions de noix de bonne qualité sont 54%, 66%, 64%, 64% et 69% respectivement pour les zones 1 ; 2 ; 3 ; 4 et 5 avec une proportion globale de 64%. La qualité des noix de cajou produites dans le département de Korhogo, est moyennement bonne. English title: Assessment of the quality of cashew nuts (Anacardium occidental L.) produced in the division of korhogo in Côte d’Ivoire The quality of raw cashews is a determining factor in setting their buying and selling prices. The aim of this study was to assess the quality of cashew nuts in order to contribute to the improvement of post-harvest treatments of said nuts and the revaluation of the income of the growers. On 208 samples, from the division of Korhogo, the quality parameters were determined according to the Ivorian standard PNI 4595. The minimum value of the average moisture contents is 5.6±1.4% while the maximum value is 5.8±1.8% with 5.7±1.8% as the overall average of the division of Korhogo. The average grainings are 182±13 nuts/kg, 179±13 nuts/kg, 180±15 nuts/kg, 179±12 nuts/kg and 181±12 nuts/kg respectively for zones 1; 2; 3; 4 and 5 with an average value of 180±13 nuts/kg. Concerning the average defect rates, they vary between 11.96±4.59% and 13.90±5.65% with the general average being 13.10±5.08%. The out-turn values fluctuate between a minimum (44.87±3.65 lbs) and a maximum (45.90±2.62 lbs). The average of this parameter in the division of Korhogo is 45.42±2.78 lbs. The proportions of good quality nuts are 54%, 66%, 64%, 64% and 69% respectively for areas 1; 2; 3; 4 and 5 with an overall proportion of 64%. The quality of the cashew nuts produced in the Korhogo division is moderately good.

scholarly journals Investigation of the quality of water in the process of its purification using ultrafiltration by the method of differential scanning calorimetry

2021 ◽  
Vol 83 (1) ◽  
pp. 323-329
Author(s):  
I. A. Saranov ◽  
S. I. Niftaliev ◽  
V. V. Toroptsev ◽  
I. A. Kuznetsov
Keyword(s):  
Water Treatment ◽  
Thermal Effect ◽  
Reverse Osmosis ◽  
Water Purification ◽  
Water Samples ◽  
Scanning Calorimetry ◽  
Treatment Scheme ◽  
Coarse Filter ◽  
Quality Of Water

The increased interest in ultrafiltration technology in the last decade is caused by the search for new purification methods that allow obtaining high-quality drinking water that meets modern regulatory requirements. Modern water purification schemes use an ultrafiltration unit before reverse osmosis in softening, desalination and demineralization of water for food production. The pore size of ultrafiltration membranes ranges from 5 nm to 0.05-0.1 microns. Using ultrafiltration instead of the traditional water treatment scheme, makes it possible to obtain water with a low content of suspended and colloidal substances, increase the productivity and serviceability of reverse osmosis membranes. The water treatment scheme may contain the following modules: coarse filter; ultrafiltration unit, buffer tank; mixer; water container; reverse osmosis installation; pumps. The method of differential scanning microscopy is used to assess the quality of water during its purification. Water samples were cooled with liquid nitrogen to -30 ? and then heated to 30 ?. Crystals melting peaks were recorded on the DSC curves, and the thermal effect was calculated. During the water purification process, the value of the thermal effect of frozen water samples melting declines (from 515.1 to 261.2 J / g), the value of the temperatures at the onset (from 0.7 to -0.13 ?) and at the peak of crystal melting (from 7.45 up to 4.27 ?). The difference between the heat effect data for water samples after coarse filtration and ultrafiltration is small, which indicates that the ultrafiltration unit allows cations and anions to pass through, which preserves the salt balance of water.

scholarly journals KELAYAKAN INVESTASI INSTALASI SEA WATER REVERSE OSMOSIS (SWRO) DI KAWASAN WISATA PANTAI KENJERAN SURABAYA

Heuristic ◽  
2016 ◽  
Vol 13 (02) ◽  
Author(s):  
I Nyoman Lokajaya
Keyword(s):  
Water Supply ◽  
Reverse Osmosis ◽  
Water Purification ◽  
Sea Water ◽  
Average Rate ◽  
Coastal Areas ◽  
Tourist Attraction ◽  
Clean Water ◽  
Purification Unit ◽  
Break Even Point

To make Kenjeran coastal areas as the mainstay tourism Surabaya municipaladministration, provision of clean water is one of the means that must be provided.Construction of sea water purification unit with sea water reverse osmosis method isone solution that can be done. This study aims to assess the feasibility of building awater purifier sea with sea water reverse osmosis method. Finally found that for aninterval of 15 years at an average rate of visitor arrivals tourist attraction as much as7,935 people / day needed clean water supply as much as 257.09 m3 / day, equivalent to10.71 m3 / hour. Average investment value of Rp. 5.5 billion with 19:38% IRR ratemuch higher than bank interest, which is 10%. Break Even Point investment occurred inyear 7 in 2023. Keywords: investment feasibility, Sea Water Reverse Osmosis, coastel tourism area

scholarly journals Kajian kesesuaian lingkungan untuk pengembangan wisata di Pantai Ganting, Pulau Simeulue, Provinsi Aceh

DEPIK ◽  
2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Herdiana Mutmainah ◽  
Gunardi Kusumah ◽  
Try Altanto ◽  
Koko Ondara
Keyword(s):  
Water Quality ◽  
Random Sampling ◽  
Sea Water ◽  
Quality Standard ◽  
Quality Parameters ◽  
Marine Tourism ◽  
Suitability Index ◽  
Aceh Province ◽  
Marine Ecotourism

Abstract. Simeulue Island is situated Indian Ocean in western part of Aceh Province, this is one of the outer island in Indonesia. Simeulue has big potency in marine resources such as  clean waters and beautiful beach, coral reefs and mangrove ecosystems. Therefore, Simeulue is very promising as an ecotourism destination. The objective of present study was to evaluate the condition of the water quality and the potency for a marine ecotourism development. The feasibility study was conducted on August in Ganting Beach, Village of Kuala Makmur, Simeulue Island. The purposive random sampling method was used to determine twelve sampling stations. The measured water quality parameters were pH, temperature, salinity, turbidity, dissolved oxygen, brightness, BOD5, odors, oil and debris. These parameters were analyized and mapped using software ODV, and then compared to the sea water quality standard for marine tourism as well as the characteristics of the coast to the suitability index of recreational area. The results showed that the water quality of Ganting Beach is very suitable for recreational activities (index 77, category S1)  andit is suitable for swimming and also for boating tourism activities, banana boats and jet skis (index 16, category S2).Keywords: water quality; marine tourism; Ganting Beach Abstrak. Pulau Simeulue, merupakan salah satu pulau terdepan sebelah barat Negara Kesatuan Republik Indonesia (NKRI), dan terletak di Samudera Hindia.Simeulue memiliki potensi sumberdaya laut yang besar, diantaranya perairan yang besih dan jenih, pantai yang indah, terumbu karang dan hutan bakau, sehingga sangat berpotensi untuk dikembang menjadi tujuan wisata. Penelitian ini bertujuan untuk menilai kondisi kualitas perairan dan potensi kesesuaian wisata Pulau Simeulue.Penelitian ini dilaksanakan pada bulan Agustus 2015 bertempat di Pantai Ganting, Kelurahan Kuala Makmur, Kabupaten Simeulue. Sebanyak 12 lokasi pengambilan sampel kualitas air ditetapkan secara purposive random sampling. Kualitas air yang diukur meliputi; pH, suhu, salinitas, kekeruhan, oksigen terlarut, kecerahan, BOD5, bau, lapisan minyak dan sampah. Data tersebut kemudian dipetakan dan dianalisis menggunakan software Ocean Data View (ODV), kemudian dibandingkan dengan baku mutu air laut untuk wisata bahari serta karakteristik pantai untuk indeks kesesuaian kawasan wisata rekreasi. Hasil penelitian menunjukkan bahwa kualitas perairan Pantai Ganting sangat sesuai untuk kegiatan rekreasi dan berenang (indeks 77, kategori S1) dan sesuai untuk kegiatan wisata berperahu, banana boat dan jet ski (indeks 16, kategori S2).Kata kunci:kualitas perairan; wisata bahari; Pantai Ganting.

scholarly journals Analisis kelimpahan E.coli dan bakteri Patogen sebagai indikator penurunan kualitas perairan pada budidaya keramba apung ikan patin desa Buluh Cina Kabupaten Kampar

Jurnal Zona ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 9-19
Author(s):  
Mumin Rifai ◽  
Zulkarnaini Zulkarnaini ◽  
Sofyan Husein Siregar
Keyword(s):  
Water Quality ◽  
River Water ◽  
Pathogenic Bacteria ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Significant Variable ◽  
Water Stream ◽  
E Coli ◽  
Average Value

The research on Escherichia coli (E. coli) and bacterial pathogens within catfish culture in Buluh Cina Village has been done in August 2015. This study aimed to analyze the quality  of the river water, the abundance of E.coli in the water stream and pathogenic bacteria in catfish and to correlate the quality of the water with an abundance of E. coli and the prevalence of pathogenic bacteria. The location of the study is three observation stations with sampling conducted by three replications. The water quality parameters under investigation were temperature, brightness, pH, DO, Nitrate, Nitrite, Ammonia, Phosphate, TSS and BOD while the indicator for microbiological contamination  is done by testing the abundance  of E. coli in the river water as well as the pathogenic bacteria in catfish. The results  of water quality measurements and testing of E. coli indicate the water quality is still good  with the standard required under Regulation No 82/2001 except ammonia, phosphates, nitrites and E. coli. Ammonia has exceeded the threshold value with the  average  from 0.018 to 0.059 mg/L, the phosphate on the average value of 4,921 to 9,804 mg/L, nitrite  in the average value from 0.015 to 0.068 mg/L and the abundance of E. coli on the value of the average 4,200-5,500 cfu / 100 ml. While the results of testing on pathogenic bacteria found in catfish are Aeromonas sp, Pseudomonas sp, Pasteurella sp and  Edwardsiella sp. The highest prevalence of pathogenic bacteria obtained in Aeromonas sp is equal to 29.63%. In the statistical test toward  chemical parameters of water  measured affects  the abundance of E. coli by 94%. The most significant variable on the water quality parameters affecting the abundance of E. coli is the temperature, TSS, pH, and DO with a correlation coefficient 0.5.

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