• Title/Summary/Keyword: Phosphorus Removal

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A Comparison Study on the Simultaneous Organic, Nitrogen and Phosphorus Removal in Sequencing Batch Reactor and Sequencing Batch Biofilm Reactor (연속 회분식 반응기와 연속 회분식 생물막 반응기의 유기물, 질소 및 인의 동시 제거에 관한 비교 연구)

  • Park Young-Seek;Kim Dong-Seog
    • Journal of Environmental Health Sciences
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    • v.31 no.2 s.83
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    • pp.152-159
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    • 2005
  • Laboratory scale experiments were conducted to study the applicability, and to compare the performance of two types of sequencing batch reactor (SBR)systems, a conventional SBR and sequencing batch biofilm reactor (SBBR) on the biological nitrogen and phosphorus removal. The nitrification rate in SaR was higher than that in SBBR both in high influent TOC concentration. The denitrification was completed at the first non-aeration period in SBR, however, the additional non-aeration period should be installed or the first aeration period should be extended more in order to complete the nitrogen removal in SBBR. The time at the first aeration period was more needed as about 4-5 h in order to uptake all the released $PO_4^{3-}\;-P$ at the first non-aeration period. SBBR needed more operation time, especially the first aeration time, than SBR at the high influent TOC concentration in order to complete nitrogen and phosphorus removal.

Improved Coagulant for High Efficiency Phosphorus Removal in Secondary Effluent of Waste Water Treatment Plant (하수처리장 2차 처리수의 고효율 인 제거를 위한 응집제 개선)

  • Choi, Jeung-seung;Lee, Byung-ha;Kim, Ki-pal;Baek, Dae-jin
    • Journal of Korean Society of Water and Wastewater
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    • v.30 no.6
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    • pp.683-690
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    • 2016
  • Modified coagulants were investigated for the removal of phosphorus from secondary effluent of wastewater treatment. The modified coagulants were prepared by mixing alkali earth metal ions such as calcium and magnesium. The basicity of a coagulant influenced on the removal of phosphorus, and coagulants with basicity of 5.9% showed a better removal of total phosphorus than that of 38.5%. Also, coagulants with alkali earth metals enhanced the performance of coagulation by 10% and resulted in 67.1% for total phosphorus removal. Moreover, the removal of suspended solids and chemical oxygen demand was improved using coagulants with low basicity and earth metal ions. Results of this study demonstrated that the use of coagulants with low basicity, and calcium and magnesium ions is recommended to improve wastewater effluent quality.

A Comparison of Nutrients Removal Characteristics by the Variation of Organics in $A_{2}O$ SBR and $A_{2}O$ SBBR for the Small Sewerage System (소규모 오수처리를 위한 $A_{2}O$ SBR과 $A_{2}O$ SBBR에서 유입 유기물 농도변화에 따른 염양염류 제거 특성 비교)

  • Park, Young-Seek;Jeong, No-Sung;Kim, Dong-Seog
    • Journal of Environmental Health Sciences
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    • v.32 no.5 s.92
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    • pp.451-461
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    • 2006
  • Laboratory scale experiments were conducted to study the conversion of sludge from conventional activated sludge to nitrogen-phosphorus removal sludge using two types of sequencing batch reactor (SBR) systems, a conventional SBR and sequencing batch biofilm reactor (SBBR). The nitrogen and phosphorus removal characteristics were similar between SBR and SBBR and the removal efficiencies were very low when the influent TOC concentrations were low. The nitrogen and phosphorus removal efficiencies in SBR were 96% and 77.5%, respectively, which were higher than those in SBBR (88% and 42.5%) at the high influent TOC concentration. In SBBR, the simultaneous nitrification-denitrification was occurred because of the biofilm process. The variations of pH, DO concentration and ORP were changed as the variation of influent TOC concentration both in SBR and SBBR and their periodical characteristics were cleary shown at the high influent TOC concentration. Especially, the pH, DO concentration and ORP inflections, were cleary occurred in SBR compared with SBBR.

Application of brass scrubber filter with copper hydroxide nanocomposite structure for phosphate removal

  • Hong, Ki-Ho;Yoo, In-Sang;Kim, Sae-Hoon;Chang, Duk;Sunwoo, Young;Kim, Dae-Gun
    • Environmental Engineering Research
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    • v.20 no.2
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    • pp.199-204
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    • 2015
  • In this study, a novel phosphorus removal filter made of brass scrubber with higher porosity of over 96% was fabricated and evaluated. The brass scrubber was surface-modified to form copper hydroxide on the surface of the brass, which could be a phosphate removal filter for advanced wastewater treatment because the phosphates could be removed by the ion exchange with hydroxyl ions of copper hydroxide. The evaluation of phosphate removal was performed under the conditions of the batch type in wastewater and continuous type through filters. Filter recycling was also evaluated with retreatment of the surface modification process. The phosphate was rapidly removed within a very shorter contact time by the surface-modified brass scrubber filter, and the phosphate mass of 1.57 mg was removed per gram of the filter. The possibility of this surface-modified brass scrubber filter for phosphorus removal was shown without undesirable sludge production of existing chemical phosphorus removal techniques, and we feel that it would be very meaningful as a new wastewater treatment.

Microbial Communities of Activated Sludge Performing Enhanced Biological Phosphorus Removal in a Sequencing Batch Reactor Supplied with Glucose

  • Jeon, Che-Ok;Seung, Han-Woo;Park, Jong-Moon
    • Journal of Microbiology and Biotechnology
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    • v.13 no.3
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    • pp.385-393
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    • 2003
  • Microbial communities were analyzed in an anaerobic/aerobic sequencing batch reactor (SBR) fed with glucose as a sole carbon source. Scanning electron microscopy (SEM) showed that tetrad or cuboidal packet bacteria dominated the microbial sludge. Quinone, slot hybridization, and 165 rRNA gene sequencing analyses showed that the Proteobacteria beta subclass and the Actinobacteria group were the main microbial species in the SBR sludge. However, according to transmission electron microscopy (TEM), the packet bacteria did not contain polyphosphate granules or glycogen inclusions, but only separate coccus-shaped bacteria contained these, suggesting that coccus-shaped bacteria accumulated polyphosphate directly and the packet bacteria played other role in the enhanced biological phosphorus removal (EBPR). Based on previous reports, the Actinobacteria group and the Proteobacteria beta subclass were very likely responsible for acid formation and polyphosphate accumulation, respectively, and their cooperation achieved the EBPR in the SBR operation which was supplied with glucose.

Characteristics of Nitrogen and Phosphorus Removal According to the Variation of Operating Cycles in (AO)2 SBBR ((AO)2 SBBR에서 운전주기에 따른 질소와 인 제거 특성 비교)

  • Park, Young-Seek;Kim, Dong-Seog
    • Journal of Environmental Science International
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    • v.16 no.1
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    • pp.45-53
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    • 2007
  • This study was carried out to investigate the variation of organic, nitrogen and phosphorus in $(AO)_2$ SBBR process according to the variation of operating cycle at the high TOC concentration. The operation time in anoxic (anaerobic) time to oxic time was 1:1. Three lab-scale SBBRS were fed with synthetic wastewater based on glucose as carbon source, The variation of total TOC removal was similar each other irrespective of operation time, however, the TOC concentrations in SBBRs showed a little difference according to the operating condition. In SBBR, complete nitrification was not occurred at all reactors, however, R3 showed a higher nitrification than R2. And in SBBR, the variation of operating time more affected at phosphorus removal than nitrogen removal. R2 which had the shortest time at the 1st aeration time showed the lowest phosphorus release and uptake efficacy.

Effects of the Variation of Aeration Time in Sequencing Batch Reactor (SBR) (1) - Nutrient Removal (Sequencing Batch Reactor (SBR)에서 포기시간 변경에 따른 영향 (1) - 영양염류 제거)

  • Jeong, No-Sung;Park, Young-Seek;Kim, Dong-Seog
    • Journal of Environmental Science International
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    • v.20 no.1
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    • pp.35-47
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    • 2011
  • The effect of the variation of aeration time on the removal of organics, nitrogen and phosphorus using synthetic wastewater was investigated in sequencing batch reactors (SBRs) which included DNPAOs and DNGAOs. The cycling times in four SBRs were adjusted to 12 hours and then included different aerobic times as 1 hr, 2.5 hr, 4 hr and 5.5 hr, respectively. Four SBR systems have been operated and investigated for over 40 days. Average TOC removal efficiencies were about 71 % in all SBRs. The $NH_4^+$-N removal efficiency was increased as the increase of aeration time. After changing aeration time, the total nitrogen removal efficiencies of SBRs were shown as 35 %, 85 %, 75 % and 65 %, respectively. Higher phosphorus release and uptake were occurred as the decrease of the aeration time. After all, the overall phosphorus removal efficiency decreased and the deterioration of phosphorus removal was occurred when aeration time was over 4 hr. Denitrification in aerobic conditions was observed, which showed the presence of DNPAOs and DNGAOs. In batch experiments, PAOs were shown as the most important microorganisms for the phosphorus removal in this experiment, and the role of DNGAOs was higher than that of DNAPOs for the nitrogen removal.

Phylogenetic Analysis of Bacterial Diversity of Enhanced Biological Phosphorus Removal Activated Sludge by Isolation and Cloning of 16S rDNA

  • Nakamura, Kazunori;Hanada, Satoshi;Kamagata, Yoichi;Kawaharasaki, Mamoru
    • Proceedings of the Korean Society for Applied Microbiology Conference
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    • 2000.10a
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    • pp.109-117
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    • 2000
  • Bacterial community structure composing enhanced biological phosphorus removal (EBPR) activated sludge was analyzed phylogenetically by cloning 165 rDNA after direct DNA extraction. Then, this result was compared with 165 rDNA sequences of randomly isolated bacterial species. The results clearly showed that there are no coincidence between the sequences retrieved directly from activated sludge and those of isolated strains, suggesting that many important bacteria are hidden in activated sludge because of the difficulty in isolation and culture of them.

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