• Title/Summary/Keyword: Potable

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POTABLE WATER TREATMENT BY POLYACRYLAMIDE BASE FLOCCULANTS, COUPLED WITH AN INORGANIC COAGULANT

  • Bae, Young-Han;Kim, Hyung-Jun;Lee, Eun-Joo;Sung, Nak-Chang;Lee, Sung-Sik;Kim, Young-Han
    • Environmental Engineering Research
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    • v.12 no.1
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    • pp.21-29
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    • 2007
  • For this study, we polymerized polyacrylamide base flocculants (PAA) and tested their properties and settling efficiency as a treatment for potable water. The most common chemicals for potable water treatment in Korea are alum or PAC. However, due to various reasons (such as rainy season or algae), inorganic flocculants cannot be solely depended on to solve all the problems caused by the poor quality of inflow water. When PAA coupled with coagulants in a potable water purification process is used, the turbidity removal efficiency increases by a factor of three on a single chemical system using PAC (Raw water: 5.21 NTU; Treated PAA+PAC: 0.34 NTU; and, Treated PAC: 1.04 NTU). It is possible to offset the toxic effect of residual monomers in treated water using PAA, because the concentrations of residual acrylamide are less than 400 mg/L in the polymer itself and less than $0.04\;{\mu}g/L$ in the treated water base at a dosage of 0.1 mg/L. Therefore, PAAs may be a workable, and dependable, potable water treatment process for the high pollutant level of resource water.

Development of a Potable Skimmer(II) - Fabrication and Performance Test of an Air Suction Skimmer (휴대용 유출기름회수기의 개발(II) - 공기흡입회수기의 제작과 성능시험)

  • 박외철
    • Journal of Environmental Science International
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    • v.3 no.2
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    • pp.177-184
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    • 1994
  • An air suction skimmer was selected as a potable skimmer to be developed among the many reviewed skimmers because of its advantages such as simple structure, excellent transportability, and easy deployment. A prototype of the skimmer was fabricated. It was shown that the skimmer operated by a commercial vacuum cleaner has good performance. The maximum suction rate of water and the maximum suction head were 18$m^3$/hr and 2.7m, respectively.

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Model based control of filter run time on potable water treatment plant

  • Jusic, Suvada;Milasinovic, Zoran
    • Coupled systems mechanics
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    • v.4 no.2
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    • pp.157-172
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    • 2015
  • Control of potable water treatment plant (PWTP) is nowadays based on experience. The aim of this article is to show that model based control of treatment process is more efficient than process operation based on experience. Stimela environment is used for modeling of processes of potable water treatment. Application of the model was conducted on PWTP "Crkvice" in Zenica (BiH). This plant has used conventional rapid sand filters. By effective application of the model it is determined the optimal filter run time for different input turbidity of raw water. This results in the possibility of reducing the consumption of backwashing water, lower costs for its pumping and reducing the amount of coagulants. In the existing practice, based on experience, these benefits are not used.

The New Evaluation Basis of Potable Water (물에 대한 새로운 평가)

  • 문승주
    • Journal of the Korean Professional Engineers Association
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    • v.35 no.4
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    • pp.24-28
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    • 2002
  • For a long time, we use the chemical analysis only for the evaluation of potable water. but recently water which Is good or not for the vital body should be proposed to take additional new evaluation technology Nuclear Magnetic Resonance(NMR). The optimum value of NMR data should be below 100Hz of Half width.

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A Study on Standardization Method Establishment of Multi Water-Loop System using Multi Water Resources (다중수원을 활용한 멀티워터 루프시스템의 표준화방안 구축에 관한 연구)

  • Lee, Hyundong;Lee, Joonhyung;Kwak, Pilljae
    • KCID journal
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    • v.21 no.1
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    • pp.109-117
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    • 2014
  • Multi water-loop system is the efficient customer centered facilities of water supply by utilizing the multi water resources. Multi water-loop system is divided into various types. The system is classified potable and non-potable type. Mostly, the potable type utilizes surface water and ground water. However, the non-potable type utilize the multi water resources, such as rain water, sea water, reclaimed water, etc. Selective intake is possible when characteristics of region, physiographic condition and purpose of use are considered. For instance, downtown type, new-city type, agriculture type, island type are available. For development and application of these multi water-loop system, standardization is needed. For standardization, several methods are given; design principles, selection and composition method of multi water-loop system structure, BIM/GIS application method, safety inspection method. Consequently, a road map of design standardization method can be established. In this road map, there are three parts for the standardization of multi water-loop system. Three parts are the considerations, base material and ways of standardization. Design standardization become close when this road map followed by someone who plan the multi water-loop system. In this way, loop system's development is more efficient and economic. In hereafter research, each type's characteristic will be analysed and standardization methods can be established.

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The Observation and a Quantitative Evaluation of Viable but Non-Culturable Bacteria in Potable Groundwater Using Epifluorescence Microscopy (형광현미경을 이용한 음용 지하수내 배양불능 세균의 관찰 및 정량적 평가)

  • ;Takashi Someya
    • Korean Journal of Microbiology
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    • v.38 no.3
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    • pp.180-185
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    • 2002
  • The direct viable count (DVC) and plate count (PC) methods was used to measure the number of bacteria in potable groundwater samples collected from bottled water from the market, mineral water, and edible groundwater near the urban areas and the stock farming congested areas. As a result, the number of living bacteria by DVC was comprised 30~80% of the total direct count (TDC), whereas the number of living bacteria by PC was around l~30% of DVC. Such results show that viable but non-culturable (VBNC) bacteria exist in the potable groundwater with high percentages. On the other hand, upon measuring the value from the conventional nutrient broth (NB), $10^-2$ fold diluted nutrient broth (DNB), and R2A broth, the values from the DNB and R2A showed 2~50 times higher than the conventional NB medium. These results indicate that oligotrophic bacterial groups which can multiply in the low nutrient broth abundantly exist in the oligotrophic environment like potable groundwater.

A Study on the Potable Rotor Diagnosis System for Induction Machines (유도기 설비의 휴대용 회전자 진단 시스템 연구)

  • Hyun, Doosoo;Yoon, Min-han
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.11
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    • pp.1657-1662
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    • 2017
  • Rotor bar faults in induction machines, which are a part of main distribution of power system, can even stop the entire system by causing contact between a stator and a rotor. There are two methods of diagnosing rotor bar faults in induction motors, online and offline tests, and existing diagnosis methods have many limitations which can lead to misdiagnosis. This paper proposes a potable rotor bar faults diagnosis system based on single phase rotation test, one of offline test methods, which detects rotor bar faults through impedance interpretation by exciting AC current in a stator winding. The test was conducted on a motor of 0.4kW in the laboratory and a motor of 1500kW in industry field.

Solar power and desalination plant for copper industry: improvised techniques

  • Sankar, D.;Deepa, N.;Rajagopal, S.;Karthik, K.M.
    • Advances in Energy Research
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    • v.3 no.1
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    • pp.59-70
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    • 2015
  • In India, continuous production of electricity and sweet/potable water from Solar power and desalination plant plays a major role in the industries. Particularly in Copper industry, Solar power adopts Solar field collector combined with thermal storage system and steam Boiler, Turbine & Generator (BTG) for electricity production and desalination plant adopts Reverse osmosis (RO) for sweet/potable water production which cannot be used for long hours of power generation and consistency of energy supply for industrial processes and power generation cannot be ensured. This paper presents an overview of enhanced technology for Solar power and Desalination plant for Copper industry making it continuous production of electricity and sweet/potable water. The conventional technology can be replaced with this proposed technique in the existing and upcoming industries.

Iron and manganese removal in direct anoxic nanofiltration for indirect potable reuse

  • Jin, Yongxun;Choi, Yeseul;Song, Kyung Guen;Kim, Soyoun;Park, Chanhyuk
    • Membrane and Water Treatment
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    • v.10 no.4
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    • pp.299-305
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    • 2019
  • Managed aquifer recharge (MAR) systems are gaining interest as an alternative to conventional water resources. However, when the water recovered in MAR systems, dissolved iron and manganese species may easily oxidize and they cause well screen clogging or require abandonment of extraction wells. In this study, both oxic and anoxic conditions were analyzed to verify the feasibility of the membrane filtration performance under various solution chemistries. The fouling mechanisms of the metal ions under anoxic conditions were also investigated by employing synthetic wastewater. The fouled membranes were then further analyzed to verify the major causes of inorganic fouling through SEM and XPS. The newly suggested anoxic process refining existing membrane process is expected to provide more precious information about nanofiltration (NF) membrane fouling, especially for demonstrating the potential advantages to chemical-free drinking water production for indirect potable reuse.

농촌지역 간이상수도 수질에 대한 수리지화학적 특성: 충남 금산군 일대

  • 이진수;고경석;김용재
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 2004.09a
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    • pp.369-372
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    • 2004
  • This study presents the hydrogeochmical investigation to know the effect of geology and sources for water quality in small potable water supply system at rural area. The results of water quality in Geumsan area showed the 3.2% of water samples exceeded the limit of drinking water standard by bacteria. The hydrochemical investigation results indicated the high EC, Ca and HCO$_3$ in surface water and metasedimentary rocks and this is caused by the dissolution of calc-slicate minerals of metasedimentary rocks.

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