• Title/Summary/Keyword: Nitrogen and phosphorus

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Advanced wastewater treatment capacity and growth of Chlorella vulgaris by nitrogen and phosphorus concentrations (N, P 농도에 따른 Chlorella vulgaris의 성장 및 하수고도처리능 평가)

  • Han, Su-Hyun;Lee, Yunhee;Hwang, Sun-Jin
    • Journal of Korean Society of Water and Wastewater
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    • v.27 no.1
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    • pp.77-82
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    • 2013
  • The growth and removal capacity of nitrogen and phosphorus of Chlorella vulgaris were evaluated in artificial wastewater with different nitrogen and phosphorus concentrations as element growing components for microalgae growth. The nitrogen concentration was varied in 9, 15, 30 and 60 mg-N/L with fixed phosphorus concentration of 3 mg-P/L. The growth and phosphorus removal capacity of C. vulgaris were high at initial nitrogen concentration of 15 and 30 mg-N/L, and the corresponding N/P ratios calculated were 5 and 10. In the case of varying in 1.5, 3, 6 and 10 mg-P/L of phosphorus concentration with fixed nitrogen concentration of 30 mg-N/L, the growth and removal capacity of nitrogen and phosphorus were excellent with phosphorus concentration of 3 and 6 mg-P/L. The corresponding N/P ratios were shown as 10 and 5. Therefore, the appropriate N/P ratio was concluded between 5 and 10 for wastewater treatment using C. vulgaris.

Reduction of Nitrogen and Phosphorus from Livestock Waste A Major Priority for Intensive Animal Production - Review -

  • Yano, F.;Nakajima, T.;Matsuda, M.
    • Asian-Australasian Journal of Animal Sciences
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    • v.12 no.4
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    • pp.651-656
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    • 1999
  • In current animal production in Japan, a large surplus of nitrogen and phosphorus is given to animals as their feed which are mostly imported from outside of our own country. Today, an excess of nitrogen and phosphorus from animal manure has been spread out of the area of animal production and the surroundings. These components have become the major reason for eutrophication of ground, surface and inland water. Nutritional studies for the reduction of nitrogen and phosphorus from animal waste has been done by many researchers. The reduction of excess protein in animal feed and the supplementation of deficient essential amino acids to feed have a possibility to increase the biological value of feed and to reduce nitrogen excretion, especially, via urine. The use of phytase activity to degrade phytate and to release utilizable inorganic phosphorus make it possible to cut an excess supply of feed additive inorganic phosphorus and to reduce phosphorus excretion from animal waste.

The Nitrogen and Phosphorus Removal of MUNR Process Using Sludge Carbon Source (초음파처리 슬러지 탄소원을 첨가한 침지헝 분리막공법의 질소, 인 처리에 관한 연구)

  • 김영규;황성희
    • Journal of Environmental Health Sciences
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    • v.28 no.5
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    • pp.1-3
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    • 2002
  • This study was to evaluate on the removal efficiencies of total nitrogen and phosphorus in municipal wastewater at MUNR process using sludge carbon source for environmental micro-organism. The removal efficiencies of total suspended solid were 85.9~91%, total nitrogen were 38.6~87.2% and total phosphorus were 30.8~39.0%, respectively. It was shown that removal efficiency of nitrogen was effectively influenced by sludge carbon source treated with ultrasonication. The removal efficiency of total phosphorus was low because the sludge was not wasted during this treatment.

Evaluation of Phosphorus and Nitrogen Delivery Characteristics of Chogang Stream Sediments (초강천의 퇴적물 분석을 이용한 총인 및 질소의 유달 특성 평가)

  • Kang, Seon-Hong;Seo, Dong-il
    • Journal of Korean Society of Water and Wastewater
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    • v.11 no.4
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    • pp.99-109
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    • 1997
  • To estimate the nutrients delivery characteristics of Chogang stream to Keum River, sediment and soil characteristics were analyzed in the stream and in the stream bank. Along the stream, soil samples from river sediment were collected and tested monthly for phosphorus and nitrogen concentrations. Nitrogen concentration in the sediment is much lower than that of soil in the river bank especially in summer presumably due to the high desorption characteristics of nitrogen by the increasing rainfall energy during summer. Instead, the concentrations of phosphorus were similar for the sediment and the soil in the river bank due to the strong adsorption characteristics of phosphorus. Batch tests were performed to evaluate the desorption potential of the sediments. Universal Soil Loss Equation (USLE) was applied to quantify soil erosion in each watershed due to rainfall. It was estimated that approximately 25% of total phosphorus by mass basis could be released from the sediment if the water was disturbed vigorously. The mass load of nitrogen and phosphorus into the Chogang Stream from the watershed were evaluated from the USLE and release ratio of phosphorus.

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The Nitrogen and Phosphorus Removal of UNR Process Using Sludge Carbon Source (슬러지 탄소원을 주입한 UNR공정의 동절기 질소, 인 처리효율)

  • Kim Young Gyu;Kim In Bae
    • Journal of Environmental Health Sciences
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    • v.28 no.1
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    • pp.93-97
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    • 2002
  • The aim of this study was to evaluate on the removal effect of total nitrogen and phosphorus with municipal wastewater in ultrasonic nutrient removal (UNR) process using ultrasonic sludge carbon source. The removal efficiency for total nitrogen was 44.2% at biological nutrient removal (BNR) process, 50.8% at UNR process. The removal efficiency for total phosphorus was 45.6% at BNR process, 46.2% at UNR process. The removal of nitrogen was effectively influenced by ultrasonic sludge carbon source.

Study on Simultaneous Removal of Nitrogen and Phosphorus Using Zeocarbon

  • Hong, Ji-Sook;Suh, Jeong-Kwon
    • Carbon letters
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    • v.11 no.2
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    • pp.112-116
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    • 2010
  • The objective of this study was to evaluate the possibility of simultaneous removal of ammonium, nitrate and phosphorus in water using the zeocarbon. In this study, the surface of zeocarbon was modified by acid because of difficulty in application of water treatment. After surface modification, the strength was enhanced about 62% higher than that of original one. The removal efficiency of ammonium and nitrate using the modified zeocarbon was about 47% and 32%, respectively and were higher than that of zeocarbon. In batch type experiment on the simultaneous removal of ammonium, nitrate and phosphorus, the presence of phosphorus did not have influence on nitrogen removal efficiency. Concomitantly, removal efficiency of phosphorus was obtained was about 35%. This indicates that the surface modified zeocarbon can be applied for simultaneous removal of nitrogen and phosphorus. Consequently, our results could be used as basic data to design of one-stage nitrogen/phosphorus simultaneous removal system.

Effect of 16 different (N, P combination) fertilizer treatments on the growth of Liriodendron tulipifera seedlings and soil chemical properties in the Nursery Station

  • Jung Won Park;Woo Bin Youn;Byung Bae Park;Min Seok Cho
    • Korean Journal of Agricultural Science
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    • v.50 no.2
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    • pp.223-234
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    • 2023
  • Appropriate fertilization methods are required according to species to supply necessary nutrients to plants and prevent soil environmental contamination in nurseries. In this study, the effects of nitrogen and phosphorus fertilization on the growth of Liriodendron tulipifera and soil characteristics were investigated. After 16 fertilization treatments (4 levels of nitrogen × 4 levels of phosphorus) were applied to one-year-old L. tulipifera seedlings at the Yongmun Nursery Station of the Korea Forest Service, height, root collar diameter (RCD), biomass, leaf nutrients, and soil characteristics were investigated. The height increased as the amount of nitrogen and phosphorus fertilization increased, and the RCD was the highest in the ×2 treatment. Biomass growth was on average 40.0% higher for the treatment with high nitrogen fertilization compared to the low nitrogen treatment. The seedling quality index was the highest with nitrogen and phosphorus ×2 treatment. Leaf phosphorus and magnesium concentrations decreased when nitrogen fertilization was applied, and leaf potassium concentrations decreased as nitrogen fertilization increased. Soil pH and exchangeable potassium decreased as the amount of phosphorus application increased, and exchangeable magnesium decreased as the amount of nitrogen application increased and increased as the amount of phosphorus application increased. Considering the growth of L. tulipifera seedlings and changes in the soil characteristics at the nursery stage, twice the standard fertilization amount is the appropriate fertilization amount for nursery of the Yongmun Nursery Station. It is expected that this study will contribute to improving nursery soil fertilization management technology for healthy seedling production.

Removal of Inorganic Nitrogen and Phosphorus from Cow s Liquid Manure by Batch Algal Culture

  • KIM, MAM-SOO;MOO-YOUNG PACK
    • Journal of Microbiology and Biotechnology
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    • v.3 no.3
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    • pp.214-216
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    • 1993
  • Cow's liquid manure (CLM), an animal waste, was treated by a batch algal culture to remove inorganic nutrients. CLM used in this study was especially high in concentrations of inorganic nitrogen and phosphorus. The optimum dilution ratio of the CLM for maximum algal growth was 1:25. Ninety five percent of inorganic nitrogen and 100% of inorganic phosphorus were removed from the CLM with a dilution ratio of 1:25.

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Variation of Phosphorus and Nitrogen Removal Characteristics According to the Decrease of Influent Phosphorus Concentration in SBR and SBBR (SBR과 SBBR에서 유입 인 농도 감소에 따른 인과 질소의 제거 특성 변화)

  • Kim, Dong-Seog;Park, Young-Seek
    • Journal of Environmental Science International
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    • v.19 no.4
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    • pp.483-490
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    • 2010
  • The purpose of this study is to investigate the effect of influent phosphorus concentration on the nitrogen and phosphorus removal in sequencing batch reactor(SBR) and sequencing batch biofilm reactors(SBBRs) in order to recover the enhanced biological phosphorus removal (EBPR) capacity at the sludge of the deterioration of EBPR capacity. In SBBRs, comparing to SBR, the organic removal was occurred actively at the 1 st non-aeration period because of the active phosphorus release at this period. However, the variation of TOC removal according to the decrease of influent phosphorus concentration was not clearly shown both in SBR and SBBRs. In case of SBR losing EBPR capacity, the EBPR capacity was not recovered by the decrease of the influent phosphorus concentration from 7.5 mg/L to 0.9 mg/L. The nitrogen removal increased by the decrease of influent phosphorus concentration both in SBR and SBBRs.

Effects of phosphorus concentration and nitrogen sources on photoautotrophic microalgae Scenedesmus dimorphus applied wastewater treatment (인 농도 및 질소원이 광합성 미세조류인 Scenedesmus dimorphus를 이용한 하수고도처리에 미치는 영향)

  • Kim, Tae-Hyeong;Cho, Yong-Beom;Park, Jeong-Eun;Hwang, Sun-Jin
    • Journal of Korean Society of Water and Wastewater
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    • v.27 no.3
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    • pp.325-329
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    • 2013
  • A result of estimating the effects of initial phosphorus concentration and nitrogen sources on removal of nitrogen and phosphorus in wastewater treatment using Scenedesmus dimorphus shows that there was no difference in microalgae growth amount and nitrogen removal amount by phosphorus concentration(5 ~ 60 mg/L). On the other hand, as initial phosphorus concentration increased, phosphorus removal amount was increased by luxury uptake of microalgae. Scenedesmus dimorphus preferred to ammonia when ammonia(40 mg/L) and nitrate(40 mg/L) are simultaneously presented and nitrogen removal rate of ammonia was high at approximately 20 mg/L/day.