Search Results 1-20 of 126

  • INFLOW WATER QUALITY AND OPERATIONAL EVALUATION AT FACILITIES UTILIZING RAINWATER:Investigation of inflow water quality and the effect of make-up water supply on carbon dioxide emission  [in Japanese]

    OKADA Seishi

    … become popular.</p><p> The purpose and effect o f the introduction of rainwater use facilities to buildings include effective use of water resources, suppression of outflow to rivers and sewers, reduction of environmental burden, emergency response, water saving, etc.</p><p> The paper listed the quality of the initial rain water and the effect of make -up supply water on the carbon dioxide emission.</p><p> (1)Initial rainwater removal is important to maintain the water quality of rainwater utilization …

    Journal of Environmental Engineering (Transactions of AIJ) 86(779), 79-87, 2021


  • Plant-Based Tacca leontopetaloides Biopolymer Flocculant (TBPF) Produced High Removal of Turbidity, TSS, and Color for Leachate Treatment

    Makhtar Nurul Shuhada Mohd , Idris Juferi , Musa Mohibah , Andou Yoshito , Hamid Ku Halim Ku , Puasa Siti Wahidah

    … TBPF reduced the turbidity, total suspended solids (TSS), and color from 218 NTU, 214 mg/L, 14201 PtCo to 45.8–54.5 NTU, 19.3–19.9 mg/L, and 852–994 PtCo, respectively, using 240 mg/L of TBPF at pH 3. …

    Processes 8(5), 527-1-527-17, 2020-04-29


  • Latest Wastewater Treatment Technology  [in Japanese]

    Kariyama Hiroaki

    <p>人口の増加や都市化,工業化の進展に合わせ,近年,環境問題は地球規模で深刻化しており現在,多くの企業がSDGsを目標に掲げビジネス活動の一貫として環境や社会問題の解決に取り組んでいる。</p><p>環境問題解決に向けたお客様の取り組みは主として,「水資源問題の解決」,「廃棄物の削減」,「持続可能なエネルギーの利用」,「環境問題の解決と生産技術の進歩の両立」の …

    JAPAN TAPPI JOURNAL 74(12), 1144-1149, 2020


  • Flocculant Containing Silicon, Aluminum, and Starch for Sewage Treatment

    Wang Runnan , Zhang Hao , Lian Lili , Wang Xiyue , Zhu Bo , Lou Dawei

    … A comparison of its coagulation efficiency in terms of the removal of turbidity and chroma was conducted in experiments. …



  • Study on the construction and environmental improvement prediction of SS-Diffusion models for the generation mechanism of turbidity which is an obstacle to seaweed culture  [in Japanese]

    Tasaki Tomoaki , Ichikawa Tetsuya , Akashi Yuzou , Katou Toshirou , Miyamukai Tomoki , Suzuki Teruaki , Takabe Teruhiro

    … <i>et al</i>., 2017) conducted continuous observations of several environmental elements and weather throughout the spring and summer in 2014, which revealed that the cause of the decrease in laver production amount was turbidity and clarified the generation mechanism of high turbidity. … In this study, we constructed SS-Diffusion models to reproduce the behavior of the SS observation numerically, and then examined some improvement cases to reduce turbidity in Izonoura. …

    Journal of Advanced Marine Science and Technology Society 24(1), 1-24, 2018


  • Effect of Intermittent Addition on Turbidity Removal by Polymer Flocculant: Computer Simulation of Simplified Flocculation Model

    Kadooka Hiroto , Miyajima Takumi , Tanaka Takanori , Jami Mohammed Saedi , Iwata Masashi

    … In the present study, from the simulated results based on the model and experimental data, we obtained the following knowledge: 1) the intermittent addition of polymer flocculant gives better and reproducible turbidity removal; … 2) the optimum dosage, which results in maximum turbidity removal in a given manner of addition, increases as the number of doses under the intermittent addition increases; …


    IR  J-STAGE 

  • Estimation of removal of pathogenic microorganism in membrane breakage and detection of membrane breakage  [in Japanese]

    田崎 翔太 , 李 善太 , 山下 尚之 , 田中 宏明

    環境衛生工学研究 = Environmental & sanitary engineering research : 京都大学環境衛生工学研究会機関誌 31(3), 82-85, 2017-07

  • Comparative Study on Water Quality of Rainwater Harvesting Facility Processes  [in Japanese]

    MAEDA Nobuharu , OKADA Seishi

    <p>各種建築物で雨水を活用している施設について1年を通して雨水流入水、砂ろ過装置後、便所洗浄水の水質及び水量の調査を行った。その結果、次のことが明らかとなった。①雨水利用施設の建物の周辺における土砂の表面露出は集水した雨水水質の濁度及び色度を高めた。②雨水流入水の水質によって処理工程の水質が大きく異なり、砂ろ過装置は装置の性能によって、除去効果に異なりがある。③沈殿槽から貯留槽に移流 …

    Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 42(240), 19-24, 2017


  • Bench-scale Study on the Removal of TiO<sub>2</sub> Nanoparticles in Natural Lake Water by Coagulation

    Zhang Chunpeng , Fan Ye , Wang Xuege , Xing Xin , Chen Xiaochen , Zhang Jianyu , Bian Jianmin

    … In this pioneering study, coagulation was found to achieve 86% of concentration removal and 74% of turbidity removal of TiO<sub>2</sub> … and the corresponding turbidity was 2.3 NTU. …

    Chemistry Letters 46(12), 1846-1848, 2017


  • Improvement of Water Quality by using Wood–Based Activated Carbon Fibers

    Lin Han Chien , Hsueh Ji Cheng , Lee Wen–Ju , Lai Ying–Jang , Wu She–Ching , Fujimoto Noboru

    … The turbidity and total hardness of the water improved by prepared WACFs were 0.37–1.60 NTU and 292.00–136.68 mg/L as CaCO3, respectively, meeting the quality standard for drinking water in Taiwan. … The maximum percent removal of sodium nitrite standard solution 0.1 μg/mL at 2 hours of standing time after processing with WACFs was about 34.5%. …

    Journal of the Faculty of Agriculture, Kyushu University 61(2), 343-350, 2016-09-01

    IR  DOI 

  • Recombinant Moringa Oleifera Lectin produced in Pichia Pastoris is a Potential Natural Coagulant

    Muhamad Azhar Abd Wahid , Megat Johari Megat Mohd Noor , Hara Hirofumi

    … The coagulation efficiencies of culture supernatants from 50 MoL-secreting colonies and a control lacking MoL secretion were compared by observing turbidity removal from a 600 NTU kaolin suspension. … Remarkably, 80% of the tested supernatants showed more than 80% turbidity removal, down to less than 100 NTU, the level achieved with the control supernatant. …

    Evergreen : joint journal of Novel Carbon Resource Sciences & Green Asia Strategy 3(2), 11-16, 2016-09

    IR  DOI 

  • Characterization and flocculability of a novel proteoglycan produced by Talaromyces trachyspermus OU5

    Fang Di , Shi Cuicui

    … Treatment of swine wastewater using BF-OU5 achieved 52.1% flocculating removal for chemical oxygen demand, 39.7% for Kjeldahl nitrogen, 18.6% for NH_4^+-N, 21.5% for total phosphorus, and 75% for turbidity. …

    Journal of bioscience and bioengineering 121(1), 52-56, 2016-01


  • Submerged-Type Ceramic Membrane Filtration System for Water Purification  [in Japanese]

    保科 克行

    Ceramics Japan = セラミックス : bulletin of the Ceramic Society of Japan 50(2), 91-95, 2015-02

  • Preparation of TiO<sub>2</sub> from Recycling Coagulation Sludge and Its Applicability on Photocatalytic Degradation of Dye Acid Red 27

    Wang Wei-Fu , Hu Cheng-Ling , Hsieh Yung-Hsu

    … on humic acid (HA) coagulation removal in water was investigated. … The coagulation results showed that the best removal of turbidity and DOC was from the addition 0.14 g/L TiCl<sub>4</sub> …



  • G0900201 Structure of Density Flow in a Sedimentation Basin with Inclined Plate Settler  [in Japanese]

    TAKAKA Kazutaka , KUROSE Ryoichi

    … A removal efficiency of turbidity is sometimes reduced in an sedimentation basin equipped with inclined plate settler in summer afternoon by the cause of density flow. … The purpose of this study is to clarify the flow structure of density flow and improve the removal efficiency. … This phenomena causes the carry turbidity matters over from an overflow trough, and worse the treated water quality. …

    The Proceedings of Mechanical Engineering Congress, Japan 2015(0), _G0900201--_G0900201-, 2015


  • P-75 Time dependence of mercury dissolution into the discharged water after amalgam removal  [in Japanese]

    Aoki H , Miyasaka T , Soma H , Aoyagi Y , Ishida Y , Miura D

    … The purpose of this study was to reveal the time dependence of mercury dissolution into the discharged water after amalgam removal. … As a result, the turbidity gradually diminished with time, and the amount of mercury emission after agitation also showed a gradual decrease with time. …

    The journal of the Japanese Society for Dental Materials and Devices 33(5), 480, 2014-09-20

    Ichushi Web 

  • Development of Actual Dyestuff Wastewater Treatment by Ozone with Carbonaceous Materials Produced from Waste Fiber

    KAWASAKI Naohito , TOMINAGA Hisato , OGATA Fumihiko

    … The methylene blue and dyestuff removal efficiency in a textile factory by ozonation and/or carbonaceous material treatment was investigated. … The dyestuff removal efficiency from actual dyestuff water was the highest when using the carbonaceous material(CT)prepared from cotton waste fiber. … The decreases in the chromaticity, turbidity, COD, and TOC of the actual dyestuff wastewater depended upon the mean pore diameter of the carbonaceous material. …

    Sen'i Gakkaishi 69(7), 125-131, 2013-07-10

    J-STAGE  References (37)

  • Experiment of roughing filters as pretreatment of slow sand filters  [in Japanese]

    中増 新市 , 平井 敏文 , 野村 満史 [他]

    工業用水 = Industrial water (617), 78-87, 2013-03

  • Mineralogy of Laterite Samples from Viet Nam and Their Use as Flocculating Agents for the Removal of Clay Suspensions

    Nga Nguyen Thi Hang , Mori Yuki , Wada Shin–Ichiro

    … The existence of clay suspended particles is one of main factors increasing turbidity in water. … As a following tendency, the present study aims to understand mineralogy of the laterite samples located in different areas in Viet Nam and investigate their use as flocculating agents for clay suspended particle removal. …

    Journal of the Faculty of Agriculture, Kyushu University 58(1), 167-173, 2013-02

    IR  DOI 

  • Treatment of Tunnel Construction Wastewater Using Chitosan Coagulant

    LEE Junho , SHIN Yiungkyewn , CHOI Changsu , BANG Kiwoong

    … As a result of jar test, a chitosan optimum dosage of 5 mg/L for tunneling wastewater sediment, leave a residual turbidity of less than 5 NTU with this condition. … Because the effectiveness of chitosan in removing turbidity was independent of pH, the operation of IDFIS system would be simple. … The synthesized turbidity was made with clay particles, stream sediments, stream suspended sediment, and tunneling wastewater sediments. …

    Journal of Water and Environment Technology 11(3), 187-195, 2013


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