Photocatalytic treatment of waste nutrient solution from soil-less cultivation of tomatoes planted in rice hull substrate

Miyama, Yoko; Sunada, Kayano; Fujiwara, Shunrokuro; Hashimoto, Kazuhito

doi:10.1007/s11104-008-9837-4

Cited by 16 publications

(5 citation statements)

References 26 publications

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“…Numerous researchers have attempted to exploit this photocatalytic reaction to decompose environmental pollutants in air and water (Ollis et al, 1991;Noguchi et al, 2003;Pichat et al, 2005). In our previous study, we have confirmed that phytotoxic compounds from rice hulls substrate in waste nutrient solution are decomposed and detoxified through the treatment system with TiO2 under solar light irradiation (Sunada et al, 2008;Miyama et al, 2009;2012). Furthermore, the growth and yield of tomatoes in a closed cultivation with the treatment system were significantly higher than those with untreated system.…”

Section: Introductionsupporting

confidence: 55%

“…In our previous study, we have confirmed that TOC of the recycling nutrient solution using rice hull substrate was kept for 3 years at the low concentration by photocatalytic treatment in the actual tomato soilless cultivation system (Miyama et al, 2009). And, it is known that silver coated cloth can continue to release silver ion into the nutrient solution for half or one year.…”

Section: Fig 2 Relationship Between Toc Concentration and Rmentioning

confidence: 63%

“…When silver-coated cloth is placed into a nutrient solution tank, silver ions are eluted and diffuse throughout the solution, providing an antibacterial effect on even the roots of crops cultivated in soilless beds (Kusakari et al, 1998;Zhao et al, 2000). However, the waste nutrient solution in closed soilless cultivation contains high concentrations of organic contaminants released from organic substrate materials and the crop itself (Sunada et al, 2008;Miyama et al, 2009). In particular, high concentrations of organic contaminants are extracted from organic substrates such as rice hull and coconut husk.…”

Section: Introductionmentioning

confidence: 99%

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Inactivation of Bacterial Wilt in Closed Soilless Cultivation by Photocatalytic Treatment and Silver

Miyama

Kawashima

Ogawa

et al. 2013

Environmental Control in Biology

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From the viewpoint of conservation-oriented agriculture, a closed soilless cultivation using an organic substrate is desirable. We found that photocatalytic treatment efficiently decomposed phytotoxic compounds from rice hull, and the growth and yield of tomatoes in a closed system with the treatment were superior to a system without it. To enhance disease control in the system, this study investigated the suppression of bacterial wilt disease in a simulated waste nutrient solution with photocatalytic and silver treatments. The untreated waste nutrient solution had a high total organic carbon (TOC) concentration, and silver in the untreated solution had no antibacterial activity. By contrast, silver in the photocatalytically treated solution showed a high antibacterial effect via the low TOC of the treated solution. A similar trend of disease onset was observed when pathogenic bacteria were inoculated into the solutions used to cultivate tomato seedlings. These results suggest that, even if the concentration of organic species in waste nutrient solution from a closed system is high, lowering the TOC by photocatalytic treatment promotes the suppression of bacterial wilt disease through the antibacterial activity of silver. It is anticipated that combining photocatalytic and silver treatments will help to stabilize crop production in closed soilless cultivation.

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Section: Introductionsupporting

confidence: 55%

Section: Fig 2 Relationship Between Toc Concentration and Rmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

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Inactivation of Bacterial Wilt in Closed Soilless Cultivation by Photocatalytic Treatment and Silver

Miyama

Kawashima

Ogawa

et al. 2013

Environmental Control in Biology

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“…NP can also be used to recover waste nutrient solution from soilless cultivation systems. An example is given by the photocatalytic treatment of waste nutrient solution coming from tomato cultivation in rice hull substrate (Miyama et al, 2009). In this experiment, the substrate was treated with TiO 2 -coated porous alumina filter, that when irradiated with ultraviolet light, exhibits a strong oxidation effect, decomposing organic compounds.…”

Section: Perspectivesmentioning

confidence: 99%

Hydroponic Solutions for Soilless Production Systems: Issues and Opportunities in a Smart Agriculture Perspective

et al. 2019

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Soilless cultivation represent a valid opportunity for the agricultural production sector, especially in areas characterized by severe soil degradation and limited water availability. Furthermore, this agronomic practice embodies a favorable response toward an environment-friendly agriculture and a promising tool in the vision of a general challenge in terms of food security. This review aims therefore at unraveling limitations and opportunities of hydroponic solutions used in soilless cropping systems focusing on the plant mineral nutrition process. In particular, this review provides information (1) on the processes and mechanisms occurring in the hydroponic solutions that ensure an adequate nutrient concentration and thus an optimal nutrient acquisition without leading to nutritional disorders influencing ultimately also crop quality (e.g., solubilization/precipitation of nutrients/elements in the hydroponic solution, substrate specificity in the nutrient uptake process, nutrient competition/antagonism and interactions among nutrients); (2) on new emerging technologies that might improve the management of soilless cropping systems such as the use of nanoparticles and beneficial microorganism like plant growth-promoting rhizobacteria (PGPRs); (3) on tools (multi-element sensors and interpretation algorithms based on machine learning logics to analyze such data) that might be exploited in a smart agriculture approach to monitor the availability of nutrients/elements in the hydroponic solution and to modify its composition in realtime . These aspects are discussed considering what has been recently demonstrated at the scientific level and applied in the industrial context.

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“…It was found that increasing litter application rates would increase orthophosphate phosphorus (PO 4 -P) concentrations in runoff but reduce nitrate nitrogen (NO 3 -N) concentrations in cropland soil. Miyama et al (2009) showed that the treatment of phytotoxic extracts from rice hulls used for soil-less cultivation of tomatoes with a titanium dioxide (TiO 2 )-coated porous alumina filter and irradiated with ultraviolet light at an intensity of 2.0 mW cm -2 could increase the germination rate of lettuce seeds.…”

Section: Waste Management and Pollution Minimizationmentioning

confidence: 99%

Agricultural Wastes

Yang¹,

Ikehata²,

Lerner³

et al. 2010

Water Environment Research

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Photocatalytic treatment of waste nutrient solution from soil-less cultivation of tomatoes planted in rice hull substrate

Cited by 16 publications

References 26 publications

Inactivation of Bacterial Wilt in Closed Soilless Cultivation by Photocatalytic Treatment and Silver

Inactivation of Bacterial Wilt in Closed Soilless Cultivation by Photocatalytic Treatment and Silver

Hydroponic Solutions for Soilless Production Systems: Issues and Opportunities in a Smart Agriculture Perspective

Agricultural Wastes

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