• Title, Summary, Keyword: hydroponic waste solution

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Recycling of Hydroponic Waste Solution for Red Pepper (Capsicum annum L.) Growth (고추재배를 위한 시설하우스 폐양액의 재활용)

  • Park, Chang-Jin;Kim, Kyung-Hee;Yoo, Kyung-Yoal;Ok, Yong-Sik;Yang, Jae-E.
    • Korean Journal of Environmental Agriculture
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    • v.24 no.1
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    • pp.24-28
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    • 2005
  • Waste of the hydroponic solution from the plastic film house cultivation was recycled to grow the red pepper(Capsicum annum L.) in upland fields as supplement for plant nutrients and irrigation sources. Application of hydroponic waste solution increased the pH and EC of the soils, coupled with the increases in the concentrations of exchangeable cations(Ca, Mg, and K), total nitrogen, $NH_4-N,\;and\;NO_3-N$. Growth and yield of red pepper were highest when the treatment of chemical fertilizer(70%) was combined with hydroponic waste solution(30%). Amounts of the daily producing hydroponic waste solution were 2,880 L $ha^{-1}\;day^{-1}$ from the experimental facilities and this could irrigate $409.86m^2$ of area to compensate for the amount of water loss by evapotranspiration(3%). The overall results demonstrated that hydroponic waste solution could be recycled as plant nutrients and irrigation water resources for enhancing soil fertility and environmental quality.

Fate of Nitrogen and Phosphorous in Hydroponic Waste Solution Applied to the Upland Soils (시설하우스 폐양액의 토양 처리에 따른 질소 및 인의 이동)

  • Yang, Jae-E.;Park, Chang-Jin;Yoo, Kyung-Yoal;Kim, Kyung-Hee;Ok, Yong-Sik
    • Korean Journal of Environmental Agriculture
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    • v.24 no.2
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    • pp.132-138
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    • 2005
  • Objective of this research was to evaluate the fate of nitrogen and phosphorous in hydroponic waste solution from the plastic film house cultivation applied to the upland soil by column leaching and field experiment. The pH and EC of leachate were decreased by the reaction with the upland soil in the column leaching experiment. The EC and concentrations of $H^+,\;K^+,\;and\;{NH_4}^+$ of leachate were decreased as the column length (soil depth) was increased. But these were increased as the amounts of the hydroponic waste solution were increased field experiment growing red pepper (Capsicum annum L.) to monitor the nutrients movement using ion exchange resin capsule demonstrated that the nutrient concentration of soil solution was increased in the orders of $PO_4-P. Nitrate concentration of resin capsule inserted into the soil was relatively higher than other nutrients $(NH_4-N\;and\;PO_4-P)$ at the 45 cm of soil depth. The overall results demonstrated that the hydroponic waste solution could be recycled as plant nutrients to enhance fertility of soils. But nitrate leaching was a major factor for safe use of the hydroponic waste solution in soil.

Selection of Filamentous Cyanobacteria and Optimization of Culture Condition for Recycling Waste Nutrient Solution (폐양액 활용을 위한 Filamentous Cyanobacteria의 선발 및 최적배양)

  • Yang, Jin-Chul;Chung, Hee-Kyung;Lee, Hyoung-Seok;Choi, Seung-Ju;Yun, Sang-Soon;Ahn, Ki-Sup;Sa, Tong-Min
    • Korean Journal of Soil Science and Fertilizer
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    • v.37 no.3
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    • pp.177-183
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    • 2004
  • The discharge of waste nutrient solution from greenhouse to natural ecosystem leads to the accumulation of excess nutrients that results in contamination or eutrophication. There is a need to recycle the waste nutrient solution in order to prevent the environmental hazards. The amount and kind of nutrients in waste nutrient solution might be enough to grow photosynthetic microorganisms. Hence in the present study, we examined the growth and mass cultivation of cyanobacteria in the waste nutrient solution with an objective of removing N and P and concomitantly, its mass cultivation. Four photosynthetic filamentous cyanobacteria (Anabaena HA101, HA701 and Nostoc HN601, HN701) isolated from composts and soils of the Chungnam province were used as culture strains. Among the isolates, Nostoc HN601 performed faster growth rate and higher N and P uptake in the BG-II ($NO_3{^-}$) medium when compared to those of other cyanobacterial strains. Finally, the selected isolate was tested under optimum conditions (airflow at the rate of $1L\;min^{-1}$. in 15 L reactor, initial pH 8) in waste nutrient solution from tomato hydroponic in green house condition. Results showed to remove 100% phosphate from the waste nutrient solution in the tomato hydroponics recorded over a period of 7 days. The growth rate of Nostoc HN601 was $16mg\;Chl-a\;L^{-1}$ in the waste nutrient solution from tomato hydroponics with optimum condition, whereas growth rate of Nostoc HN601 was only $9.8mg\;Chl-a\;L^{-1}$ in BG-11 media. Nitrogen fixing capacity of Nostoc HN601 was $20.9nmol\;C_2H_4\;mg^{-1}\;Chl-a\;h^{-1}$ in N-free BG-11. The total nitrogen and total phosphate concentration of Nostoc HN601 were 63.3 mg N gram dry weight $(GDW)^{-1}$ and $19.1mg\;P\;GDW^{-1}$ respectively. Collectively, cyanobacterial mass production using waste nutrient solution under green house condition might be suitable for recycling and cleaning of waste nutrient solution from hydroponic culture system. Biomass of cyanobacteria, cultivated in waste nutrient solution, could be used as biofertilizer.

Optimum Configuration, Filter Media Depth and Wastewater Load of Small-scale Constructed Wetlands for Treating the Hydroponic Waste Solution in Greenhouses (시설하우스 폐양액 처리를 위한 소형 인공습지의 최적 조합방법, 여재깊이 및 폐양액 부하량)

  • Park, Woo-Young;Seo, Dong-Cheol;Lim, Jong-Sir;Park, Seong-Kyu;Cho, Ju-Sik;Heo, Jong-Soo;Yoon, Hae-Suk
    • Korean Journal of Environmental Agriculture
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    • v.27 no.3
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    • pp.217-224
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    • 2008
  • To obtain optimum configuration, depth and load of constructed wetlands(CWs) for treating of hydroponic waste solution(HWS) which was produced in greenhouses, the study was conducted with 4 kinds of combined systems such as Vertical flow(VF)-Horizontal flow(HF), VF-VF, HF-VF and HF-HF CWs. In four configurations of CWs, the treatment efficiency of pollutants from HWS under depth of HF and VF beds, HWS loading and HWSs were investigated. Removal rate of pollutants under different depth of VF and HF in 2-stage hybrid CWs was in the order of 50 cm < 70 cm regardless of CWs configuration. Removal rate of pollutants under HWS loading in 2-stage hybrid CWs was in the order of $150L\;m^{-2}\;day^{-1}{\fallingdotseq}300L\;m^{-2}\;day^{-1}\;>\;450L\;m^{-2}\;day^{-1}$. The optimum depth and HWS loading were 70 cm and $300L\;m^{-2}\;day^{-1}$ in four configurations of CWs, respectively. Using this optimum condition, for various HWSs (cucumber, paprika and strawberry HWS), removal rate of pollutants in HF-HF CWs was higher than that in HF-VF CWs. Optimum configuration of 2-stage hybrid CWs for treating hydroponic waste solution in greenhouses was found out to be HF-HF CWs. Therefore, under the optimum conditions, removal rate of BOD, COD, SS, T-N and T-P in HF-HF CWs were 84, 81, 84, 51 and 93%, respectively.

The Closed Recycling System for Combination fish Culture and Hydroponic Vegetable Production

  • Takahiro-SAITO;Koji-OTSUBO;Lee, Gonigin;Seishu--TOJO;Kengo-WATANABE;I, Fusakazu-A
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • pp.584-590
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    • 1993
  • The constructed closed recycling system discussed in this technical report will be economically viable in future for the production of fish and vegetable in earth, space station and space colony, further, it will contribute a lot in the prevention of pollution in the world's ecological system. To make combined system, water management (Nitrification) is required, and it took 45 days to breed microorganism which facilitates this process. After this period , the recycle was confirmed to be working .Using derived equations, the expected nutrient characteristics of waste water were determined and it was found that the resulting nutrient balance was almost same as that in hydroponic solution when KOH was added to maintain pH level. Reverse osmosis (RO) system could solve the problem of the low nutrient concentration . It was found that plants grow well in fish waste water which was produced using RO system. RO system could combine fish and plant production through the advantageous use of separated high concentration water for plant and permeated water for fish in integrated combined system.

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Effects of Reclaimed Wastewater and Waste Nutrient Solution Irrigation on Seedling Growth of Chinese Cabbage (하수처리수 및 폐양액의 재이용이 배추 유묘 생장에 미치는 영향)

  • Hong, Ki-Chan;Choi, Bong-Su;Lim, Kyoung-Jae;Won, Jae-Hee;Jeon, Shin-Jae;Hur, Seung-Oh;Ha, Sang-Keun;Kim, Nam-Won;Yang, Jae-E;Ok, Yong-Sik
    • Korean Journal of Environmental Agriculture
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    • v.28 no.2
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    • pp.171-178
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    • 2009
  • Water shortages are expected to be a major impact of climate change. This study examined the growth of Chinese cabbage seedling using reclaimed wastewater and waste nutrient solution as alternative irrigation resources. Generally, the concentration of nutrients, such as $K^+$, $NH_4^+$, $Mg^{2+}$, $Ca^{2+}$, $Cl^-$,$NO_3^-$, $PO_4^-$ and $SO_4^{2-}$, in waste nutrient solution was higher than that in wastewater. However, Chinese cabbage seedling irrigated with wastewater was supplied a higher concentration of $Na^+$ and $Cl^-$ than waste nutrient solution. The growth of Chinese cabbage seedling irrigated with waste nutrient solution was similar or higher than those irrigated with groundwater as control, while the growth of those irrigated with wastewater was similar to those irrigated with groundwater. The total nitrogen uptake in Chinese cabbage seedling irrigated with groundwater, waste nutrient solution from organic and inorganic hydroponic cultures, and wastewater was 5.47, 10.02, 5.20, and 4.59 mg/plant, respectively. The nitrogen uptake of Chinese cabbage seedling irrigated with waste nutrient solution from organic hydroponic substrates in a 50% lower dose than recommended was 8.34 mg/plant, which is higher than that of the cabbage irrigated with groundwater. Overall, the results suggest that waste nutrient solution and wastewater can be used as alternate water resources, and can allow a reduction in the amount of fertilizer needed to raise Chinese cabbage seedling.

Effects of Initial EC Values on Seedling Growth and Utilization of Minerals in Hydroponic Rice Seedling Raising (벼 수경육묘에서 양액의 EC 초기 설정에 따른 묘 생육과 무기성분의 이용)

  • 김영광;홍광표;정완규;손길만;송근우;강진호
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.48 no.3
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    • pp.200-204
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    • 2003
  • This study was conducted to develop a technology for raising seedlings hydroponically using the bed in which the seedlings grew in nutrient solution without soil. In order to establish the optimum EC value of nutrient solution, six initial EC values (1, 2, 3, 4, 5 dS/m and control) of Yoshida's hydroponic solution were examined. Seedling height and dry weight increased with increasing below EC up to 3.0 dS/m, but showed no significant increase at higher than EC 3.0 dS/m. Nutrient solution with initial EC of 3.0 dS/m was good to be dropped down nearly to 1 dS/m after 15-day seedling culture. But those with initial EC of 4.0 and 5.0 dS/m were judged not appropriate because of high EC value in waste nutrient solution. Utilization efficiency of minerals of nutrient solution and rice endosperm was higher on the whole at initial EC of 2.0-3.0 dS/m. Considering seedling growth and utilization efficiency of supplied nutrient solution, initial EC is judged to be suitable at 3.0 dS/m.

Chemical Characteristics of Ground Water for Hydroponics and Waste Nutrient Solution after Hydroponics in Chungbuk Area (충북지역 양액 재배용 지하수 및 폐양액의 화학적 특징)

  • Lee, Gyeong-Ja;Kang, Bo-Goo;Lee, Ki-Yeol;Yun, Tae;Park, Seong-Gyu;Lee, Cheol-Hee
    • Korean Journal of Environmental Agriculture
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    • v.26 no.1
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    • pp.42-48
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    • 2007
  • This survey has been conducted to obtain basic data of the quality of ground water for hydroponics and waste nutrient solution after hydroponics in hydroponic farms in Chungbuk area. Ground water samples were collected and analyzed at 19 sites of hydroponic farms. Waste nutrient solution samples were analyzed at 15 sites selected of them. The values of several components in ground water for hydroponics were as follows. pH range was shown from 6.2 to 7.7 and the average was 6.8. EC range was shown from 0.10 to 0.45 dS $m^{-1}$ and the average 0.23 dS $m^{-1}$. $NO_3-N$ concentrations was ranged from 0.12 to 13.77 mg $L^{-1}$, $SO_4^{2-}$ concentrations was ranged from 1.84 to 63.01 mg $L^{-1}$ and $Cl^-$ concentrations were ranged from 10.46 to 72.09 mg $L^{-1}$. Average values of $NO_3-N$, $SO_4^{2-}$ and $Cl^-$ were 4.00 mg $L^{-1}$, 12.70 mg $L^{-1}$ and 27.57 mg $L^{-1}$, respectively. $Ca^{2+}$, $Mg^{2+}$ and $Na^+$ concentrations were ranged from 3.24 to 36.99 mg $L^{-1}$, 1.44 to 14.93 mg $L^{-1}$ and 6.12 to 25.25 mg $L^{-1}$, respectively. Average concentrations were 13.06 mg $L^{-1}$ in $Ca^{2+}$, 6.02 mg $L^{-1}$ $Mg^{2+}$ and 12.08 mg $L^{-1}$ in $Na^+$. In waste nutrient solution after hydroponics, pH range was shown from 4.3 to 8.8 and the average was 6.7. EC range was shown from 0.44 to 2.37 dS $m^{-1}$ and the average 1.15 dS $m^{-1}$. Range of $NO_3-N$, $PO_4-P$, $K^+$, $Ca^{2+}$, $Mg^{2+}$ and $Na^+$ in waste nutrient solution were $10{\sim}212$, $0.56{\sim}26.1$, $10{\sim}295$, $16{\sim}215$, $9{\sim}54$ and $10{\sim}53$ mg $L^{-1}$ respectively. Average concentration were 100 mg $L^{-1}$ in $NO_3-N$, 12.15 mg $L^{-1}$ in $PO_4-P$, 99 mg $L^{-1}$ in $K^+$, 78 mg $L^{-1}$ in $Ca^{2+}$, 26 mg $L^{-1}$ in $Mg^{2+}$ and 26 mg $L^{-1}$ in $Na^+$. Inorganic matters in waste nutrient solution after hydroponics was higher than that of ground water for hydroponics.

Selection of Optimum System in Constructed Wetlands for Treating the Hydroponic Waste Solution Containing Nitrogen and Phosphorus (질소 및 인 함유 폐양액 처리를 위한 최적 인공습지 시스템 선정)

  • Park, Jong-Hwan;Seo, Dong-Cheol;Kim, Seong-Heon;Lee, Choong-Heon;Choi, Jeong-Ho;Kim, Hong-Chul;Lee, Sang-Won;Ha, Yeong Rae;Cho, Ju-Sik;Heo, Jong-Soo
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.5
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    • pp.764-771
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    • 2012
  • In order to develop constructed wetlands for treating hydroponic wastewater in greenhouse, actual constructed wetlands were used the obtained optimum condition in previous study, and the removal rate of pollutant in the water according to 4 kinds connection method of piping such as system A (UP-UP stream), system B (UP-DOWN system), system C (DOWN-UP stream) and system D (DOWN-DOWN stream) were investigated. Removal rate of biochemical oxygen demand (BOD), chemical oxygen demand (COD), suspended solids (SS), total nitrogen (T-N) and total phosphorus (T-P) by system A (UP-UP stream) connection method in actual constructed wetlands were slightly higher than other systems. At the system A, the removal rate of BOD, COD, SS, T-N and T-P were 88, 77, 94, 54 and 94%, respectively. Under different hydroponic wastewater loading, the removal rates of pollutants were higher in the order of $75L\;m^{-2}day^{-1}{\fallingdotseq}150L\;m^{-2}day^{-1}$ $$\geq_-$$ $300L\;m^{-2}day^{-1}$. Therefore, optimum connection method was system A for treating hydroponic wastewater in greenhouse.

Effects of Concentrated Pig Slurry Separated from Membrane Filter and Several Environment-Friendly Agro-Materials Mixtures on the Growth and Yield of Lettuce (Lactuca sativa L.) in Hydroponics (막분리 돈분농축액비와 몇가지 친환경농자재의 혼합액이 수경재배에서 상추의 생육과 수량에 미치는 영향)

  • Ryoo, Jong-Won
    • Journal of Animal Environmental Science
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    • v.16 no.1
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    • pp.51-60
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    • 2010
  • This experiment was conducted to investigate the effects of concentrated pig slurry separated from membrane filter and by environment-friendly agro-materials mixtures on growth of lettuce in hydroponics. The swine waste treatment system having a ultra filtration and a reverse osmosis process was designed in this study. Filtration of pig slurry was necessary to prevent the hose clogging in hydroponics. Primary separation using ultra filter was followed by concentration by RO (Reverse Osmosis). The concentrated pig slurry (CS) was mixed by five different environment-friendly agro-materials mixtures. The chemical nutrient solution was the solution of National Horticulture Research Station for the growth of lettuce. The concentration of nutrient solution in hydroponics was adjusted a range of 1.5 mS/cm in EC. The concentrated pig slurry was low in phosphorus(P), suspended solid and heavy matal, but rich in potassium (K). The concentrated slurry was lowest in the growth characteristics of leaf lettuce. And also SPAD value in leaf was reduced in plot treated with concentrated slurry. But the growth of lettuce in the mixtures plot (CS+BM+AA, CS+BM+AA+SW) in hydroponics was significantly high compared to concentrated slurry. The fresh yield of lettuce was 78, 84% that of nutrient solution as 131.9, 142.2g in plot of CS+BM+AA and CS+BM+AA+SW, respectively. Our studies have shown that it is possible to produce organic culture using concentrated slurry and environment-friendly agro-materials mixture, although growth is slower than when using a conventional inorganic hydroponic solution.