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논문 기본 정보

자료유형
학위논문
저자정보

장수민 (인하대학교, 인하대학교 대학원)

지도교수
김정환
발행연도
2019
저작권
인하대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

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In this study, ceramic membrane made of cost-effective, pyrophyllite materials as a supporting layer (UPM: pore size 1.0 μm) with coated alumina as an active layer (CPM: pore size 0.1 μm) and CAM: alumina materials as a supporting layer with coated alumina as an active layer (pore size 0.1 μm) were developed for metal-plating wastewater treatment. Real acidic metal-plating wastewater A and B were obtained from a real metal-plating company in South Korea. The flat-tubular ceramic membrane was submerged into a fluidized bed membrane reactor combined with absorbent as fluidized media. There are two types of absorbent which are GAC or zeolite were fluidized by recirculating bulk wastewater through the reactor to provide adsorption capacity to the organic contaminants, metal ions and mechanical cleaning tool to reduce membrane fouling. Adjusting the wastewater pH to neutral improved membrane performance by enhancing the rejection of heavy metals through membrane. For both coated and non-coated alumina pyrophyllite membrane were tested with wastewater A at set-point flux 45 LMH to investigate the role of active layer in organic contaminants removal efficiency and fouling rate. Also, at neutral pH GAC could absorb more heavy metals than acidic condition. Coated pyrophyllite ceramic membrane was better organic removal efficiency than uncoated pyrophyllite ceramic membrane. Also, comparative study was performed using the fluidized ceramic membrane reactor (FBMR) combined GAC particles (> 0.84 mm) or zeolite particles (> 0.84 mm) to treat wastewater B at set-point flux of 65 LMH by using CAM. Under GAC fluidization was better removal capacity (organic and metal ions) than zeolite at all conditions. However, there was no significant difference between GAC dosages (10 vs. 30 %) on removal organic contaminants, metal ions and the control of membrane fouling. TSS was near zero in permeate for all conditions. Long-term experiment was also investigated with and without the GAC condition and there were similar observation tendencies. Also, there was no irreversible fouling observed under the GAC condition.

목차

Acknowledgements ⅱ
Abstract ⅲ
Nomenclature and Abbreviations ⅴ
List of Figures ⅹ
List of Tables ⅹⅱ
1. Introduction 1
2. Background 4
2.1. Metal-plating wastewater 4
2.2. Membrane filtration 5
2.3. Porous membrane 6
2.4. Membrane fouling 7
2.5. Fouling control 8
2.6. Adsorption 11
3. Material and methods 13
3.1. Feed solutions 13
3.2. Ceramic membranes 14
3.3. Experimental set-up of fluidized bed membrane reactor (FBMR) 16
3.4. Membrane cleaning 18
3.5. Analysis methods 19
4. Result and Discussion 20
4.1. Pyrophyllite ceramic membrane with wastewater A 20
4.1.1 Effect of GAC fluidization on critical flux 20
4.1.2 Effect of solution pH on membrane fouling 21
4.1.3 Organic removal efficienc 25
4.1.4 Heavy metals removal efficiency 28
4.2. Alumina ceramic membrane with wastewater B 31
4.2.1 Effect of pH neutralization 31
4.2.2 Fluidized GAC and Zeolite as media 35
4.2.3 Comparison dosage of GAC at pH 7 37
4.2.4 long-term experiment 39
5. Conclusion 42
References 43

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