Drainwater filtration for the control of nematodes in hydroponic-type systems

Moens, Maurice; Hendrickx, G.

doi:10.1016/0261-2194(92)90082-g

Cited by 12 publications

(6 citation statements)

References 4 publications

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“…Darling [25] successfully used a combination of sand filter, cellulose cartridge and ceramic filters to eliminate propagules > 1 µm. Plant parasitic nematodes were retained by passing contaminated water through a series of four filters comprising a gauze cartridge (150 µm) and three polyester filter bags (80, 1 and 1 µm) [55].…”

Section: Membrane Filtrationmentioning

confidence: 99%

Disinfestation of recirculating nutrient solutions in greenhouse horticulture

Alsanius²,

et al. 2001

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Recirculating nutrient systems offer a good method to control nutrient leaching from greenhouses into the environment. However, the potential for the rapid spread of root diseases is the main hindrance to adoption of recirculating nutrient systems by the greenhouse industry. This review discusses and compares five broadly different methods of disease control in these systems, namely heat, filtration, chemical, radiation and biological control. Each has strengths and weaknesses, but all have been found to be effective in terms of pathogen control. Sterilization (heat, oxidizing chemicals, UV radiation) and membrane filtration methods are generally very effective, but may adversely affect beneficial microorganisms in the recirculated solution. Slow filtration and microbial inoculation methods are less disruptive of the microflora, but effectiveness may vary with the pathogen. Microbial inoculation holds the promise of very targeted disease suppression, but few products are commercially available. recirculation / disinfestation / hydroponics / disinfection / root diseaseRésumé -Désinfestation des solutions nutritives recyclées en horticulture sous serre. L'utilisation de systèmes de recirculation des nutriments est une bonne façon de contrôler le lessivage des nutriments des serres dans l'environnement. Toutefois, le risque de propagation rapide de maladies des racines est le principal obstacle à l'adoption de tels systèmes par l'industrie serricole. La présente étude examine et compare cinq façons distinctes de contrer les maladies dans ces systèmes, à savoir le traitement thermique, la filtration, le traitement chimique, le rayonnement et la lutte biologique. Chacune de ces méthodes a ses points forts et ses points faibles, mais toutes se sont révélées efficaces pour combattre les pathogènes. La stérilisation (par la chaleur, l'utilisation d'agents oxydants ou le rayonnement ultraviolet) et la filtration sur membrane sont habituellement très efficaces, mais peuvent nuire aux microorganismes utiles dans la solution recirculée. La filtration lente et l'inoculation microbienne sont moins nuisibles à la microflore, mais leur efficacité peut varier selon le pathogène. L'inoculation microbienne permet une élimination très sélective des maladies, mais peu d'inoculants microbiens sont disponibles dans le commerce. recirculation / désinfestation / culture hydroponique / désinfection / maladie des racinesAgronomie 21 (2001) 323-339 323

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Section: Membrane Filtrationmentioning

confidence: 99%

Disinfestation of recirculating nutrient solutions in greenhouse horticulture

Alsanius²,

et al. 2001

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“…Methods for the continuous control of microbial water quality in recirculating hydroponic systems almost exclusively focus on the removal of plant pathogens and include membrane filtration [67], slow sand filtration, [68][69][70][71], and ultraviolet (UV) light treatment [72][73][74]. Methods for pre-treating water that are used to prepare nutrient solutions include ozonation [75], chlorination, iodine, or hydrogen peroxide.…”

Section: Water Treatment Strategiesmentioning

confidence: 99%

Risk of Human Pathogen Internalization in Leafy Vegetables During Lab-Scale Hydroponic Cultivation

2019

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Controlled environment agriculture (CEA) is a growing industry for the production of leafy vegetables and fresh produce in general. Moreover, CEA is a potentially desirable alternative production system, as well as a risk management solution for the food safety challenges within the fresh produce industry. Here, we will focus on hydroponic leafy vegetable production (including lettuce, spinach, microgreens, and herbs), which can be categorized into six types: (1) nutrient film technique (NFT), (2) deep water raft culture (DWC), (3) flood and drain, (4) continuous drip systems, (5) the wick method, and (6) aeroponics. The first five are the most commonly used in the production of leafy vegetables. Each of these systems may confer different risks and advantages in the production of leafy vegetables. This review aims to (i) address the differences in current hydroponic system designs with respect to human pathogen internalization risk, and (ii) identify the preventive control points for reducing risks related to pathogen contamination in leafy greens and related fresh produce products.

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“…Membrane filtration with small pore size (<10 mm) or slow media filtration are the only filtration options for removal of microorganisms from water (Ehret et al, 2001;Stewart-Wade, 2011;Van Os, 2010). Multiple stages of membrane filtration were more efficient in removing plant parasitic nematodes than a single filtration stage in experimental research (Moens and Hendricks, 1992;Ohtani et al, 2000). Disagreement among the experts for ratings related to filtration (excluding membrane filtration) may have arisen because slow media filtration was not specifically included as a technology in the survey.…”

Section: Costmentioning

confidence: 99%

Modified Delphi Survey on Key Attributes for Selection of Water-treatment Technologies for Horticulture Irrigation

Raudales

Irani

Hall

et al. 2014

hortte

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A wide range of water-treatment technologies is used to control waterborne microbial problems in greenhouse and nursery irrigation. An online modified Delphi survey was carried out to identify the perceived key attributes that growers should consider when selecting among water-treatment technologies and to characterize a list of 14 technologies based on those same attributes. The expert panel consisted of ornamental plant growers (n = 43), water-treatment industry suppliers (n = 28), and research and extension faculty (n = 34). The survey was delivered to the expert panel in two rounds. Response rate was 59% and 60% for the first and second rounds, respectively. Growers identified control of plant disease, algae, and biofilm as primary reasons for adopting technologies, whereas mandatory regulation was not a major reason for adoption. All 23 attributes (related to cost, system size, control of microorganisms, chemistry, ease of use, and regulation) were perceived to be important when selecting between water-treatment technologies. Injectable sanitizing chemicals such as chlorination were considered to have low capital cost, unlike technologies that required installation of more complex equipment, such as heat treatment, hydrogen peroxide, ozone, reverse osmosis, or ultraviolet radiation. Filtration (excluding membrane filtration) was the only technology not perceived to be effective to control microorganisms. Filtration and copper were not considered effective to control human food-safety pathogens. Ozone was rated the highest as a technology that removes or oxidizes agrochemicals. Chemical water treatments, as opposed to physical water treatments, were perceived to be sensitive to water quality parameters and to have residual effect through the irrigation. Chlorine gas was perceived to be the only technology for which regulatory permission would be an obstacle. All technologies were perceived to be effective in water with low electrical conductivity (EC) or in solutions containing water-soluble fertilizers. This survey documents perceived attributes of water-treatment technologies, which are most useful where experimental data are not yet available. Research and outreach needs were highlighted by cases where perceived attributes differed from available experimental data or where there was a lack of consensus between experts.

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Drainwater filtration for the control of nematodes in hydroponic-type systems

Cited by 12 publications

References 4 publications

Disinfestation of recirculating nutrient solutions in greenhouse horticulture

Disinfestation of recirculating nutrient solutions in greenhouse horticulture

Risk of Human Pathogen Internalization in Leafy Vegetables During Lab-Scale Hydroponic Cultivation

Modified Delphi Survey on Key Attributes for Selection of Water-treatment Technologies for Horticulture Irrigation

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