Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment Process
Objectives The objective of this study is to investigate characteristics about removal of dissolved organic matter (DOM) and its fraction for improving operation efficiency in an advanced water treatment plant. Methods The monitoring of water quality was conducted at five processes such as raw water...
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| Format: | Article |
| Language: | English |
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Korean Society of Environmental Engineers
2023-07-01
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| Series: | 대한환경공학회지 |
| Subjects: | |
| Online Access: | http://www.jksee.or.kr/upload/pdf/KSEE-2023-45-7-288.pdf |
| _version_ | 1797742487378329600 |
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| author | Heejong Son Eun-Young Bae Eun-Young Jung Byungryul An |
| author_facet | Heejong Son Eun-Young Bae Eun-Young Jung Byungryul An |
| author_sort | Heejong Son |
| collection | DOAJ |
| description | Objectives The objective of this study is to investigate characteristics about removal of dissolved organic matter (DOM) and its fraction for improving operation efficiency in an advanced water treatment plant. Methods The monitoring of water quality was conducted at five processes such as raw water, pre-oxidation, after sedimentation, post-ozonation, after biological activated carbon (BAC) from July 2020 to August 2021 in advanced water treatment process (AWTP) supplying 180,000m3/day. The concentration of DOC (dissolved organic carbon) and number of algae were monitored and LC-OCD was used to fractionate DOC to four species, biopolymer (BP), humic substance (HS), building blocks (BB), and low molecular weights (LMWs). Results and Discussion The characteristics of raw water showed that the concentration of DOC and the number of algae increased with an increase in water temperature. The portion of BP and HS significantly increased at low and high water temperature, respectively, while BB and LMWs maintained the similar portion. The removal efficiency of DOC in the AWTP was achieved at 59% with each species of BP, HS, BB, and LMWs obtaining removal efficiency of 87%, 65%, 26%, and 52%, respectively. Coagulation/sedimentation/filtration showed removal efficiency of 84%, 56%, 20%, and 18% for BP, HS, BB, and LMWs, respectively, corresponding to their molecular weight. The effect of post-ozonation would be negligible except for BP. In BAC, removal efficiency of 49% and 12% were obtained for LMWs and BB (low molecular weight, respectively. As a result, the BP portion significantly decreased due to high removal efficiency, while BB portion was increased in the final treated water compared to raw water. Conclusion Most of DOM was removed in coagulation/sedimentation/filtration and BAC, whereas oxidation process such as pre-chlorination, pre-ozonation and post-oxidation did not have an effect on DOM removal. In coagulation/sedimentation/filtration, 84% and 54% of the BP and HS were removed, while BAC removed 49% and 12% of LMWs and BB, respectively. It has been recommended to improve the removal efficiency of BB, which obtained the lowest removal efficiency in AWTP, and to enhance the removal efficiency of LMWs in BAC to inhibit microbial regrowth in the distribution system. |
| first_indexed | 2024-03-12T14:41:32Z |
| format | Article |
| id | doaj.art-ec846f430ac84b8f85bbb6ef574dc7a2 |
| institution | Directory Open Access Journal |
| issn | 1225-5025 2383-7810 |
| language | English |
| last_indexed | 2024-03-12T14:41:32Z |
| publishDate | 2023-07-01 |
| publisher | Korean Society of Environmental Engineers |
| record_format | Article |
| series | 대한환경공학회지 |
| spelling | doaj.art-ec846f430ac84b8f85bbb6ef574dc7a22023-08-16T07:30:42ZengKorean Society of Environmental Engineers대한환경공학회지1225-50252383-78102023-07-0145728829510.4491/KSEE.2023.45.7.2884465Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment ProcessHeejong Son0Eun-Young Bae1Eun-Young Jung2Byungryul An3Water Quality Institute, Water authority, BusanWater authority, BusanWater Quality Institute, Water authority, BusanDepartment of Civil Engineering, Sangmyung Univeristy, CheonanObjectives The objective of this study is to investigate characteristics about removal of dissolved organic matter (DOM) and its fraction for improving operation efficiency in an advanced water treatment plant. Methods The monitoring of water quality was conducted at five processes such as raw water, pre-oxidation, after sedimentation, post-ozonation, after biological activated carbon (BAC) from July 2020 to August 2021 in advanced water treatment process (AWTP) supplying 180,000m3/day. The concentration of DOC (dissolved organic carbon) and number of algae were monitored and LC-OCD was used to fractionate DOC to four species, biopolymer (BP), humic substance (HS), building blocks (BB), and low molecular weights (LMWs). Results and Discussion The characteristics of raw water showed that the concentration of DOC and the number of algae increased with an increase in water temperature. The portion of BP and HS significantly increased at low and high water temperature, respectively, while BB and LMWs maintained the similar portion. The removal efficiency of DOC in the AWTP was achieved at 59% with each species of BP, HS, BB, and LMWs obtaining removal efficiency of 87%, 65%, 26%, and 52%, respectively. Coagulation/sedimentation/filtration showed removal efficiency of 84%, 56%, 20%, and 18% for BP, HS, BB, and LMWs, respectively, corresponding to their molecular weight. The effect of post-ozonation would be negligible except for BP. In BAC, removal efficiency of 49% and 12% were obtained for LMWs and BB (low molecular weight, respectively. As a result, the BP portion significantly decreased due to high removal efficiency, while BB portion was increased in the final treated water compared to raw water. Conclusion Most of DOM was removed in coagulation/sedimentation/filtration and BAC, whereas oxidation process such as pre-chlorination, pre-ozonation and post-oxidation did not have an effect on DOM removal. In coagulation/sedimentation/filtration, 84% and 54% of the BP and HS were removed, while BAC removed 49% and 12% of LMWs and BB, respectively. It has been recommended to improve the removal efficiency of BB, which obtained the lowest removal efficiency in AWTP, and to enhance the removal efficiency of LMWs in BAC to inhibit microbial regrowth in the distribution system.http://www.jksee.or.kr/upload/pdf/KSEE-2023-45-7-288.pdfdissolved organic matter (dom)fractionmolecular weightaromacitydrinking water treatment |
| spellingShingle | Heejong Son Eun-Young Bae Eun-Young Jung Byungryul An Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment Process 대한환경공학회지 dissolved organic matter (dom) fraction molecular weight aromacity drinking water treatment |
| title | Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment Process |
| title_full | Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment Process |
| title_fullStr | Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment Process |
| title_full_unstemmed | Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment Process |
| title_short | Dissolved Organic Matter Fractions and Their Removal in Full-Scale Drinking Water Treatment Process |
| title_sort | dissolved organic matter fractions and their removal in full scale drinking water treatment process |
| topic | dissolved organic matter (dom) fraction molecular weight aromacity drinking water treatment |
| url | http://www.jksee.or.kr/upload/pdf/KSEE-2023-45-7-288.pdf |
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