Innovative Solutions for Removing Nitrogen Compounds from Water of Recirculating Aquaculture Systems Using Clinoptilolite Natural Zeolites (original) (raw)
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Use of clinoptilolite natural zeolite in aquaculture - a review
2019
In 2016, the global aquaculture was 46.82%of total fish production, which means 80 million tonnes of 170.9 million tonnes. Latest researches highlighted that using the natural zeolites in aquaculture in order to maximize the use of resources (water, food, species) and to ensure the lowest negative impact on the environmentwas the most viable solution. The studies on zeolites use, clinoptilolitein particular, were focused on their use as feed additives (up to 2.5% concentration) and also as water quality improvers; this is mainly due to their ability to remove ammonia, its compounds and heavy metals, to reduce water hardness and to consequently prevent diseases and decrease the losses on fish population. A practical and efficient use of natural zeolites in aquaculture will determine increased economic efficiency.
Ammonia removal capacity of European natural zeolite tuffs: application to aquaculture waste water
Aquaculture Research, 1994
The possibility of improving aquaculture water quality using different kinds of zeolites is discussed. Zeolites are aluminosilicates, whose framework structure allows them to exchange cations. Cations have differing affinities for different structures, and in particular ammonia has a great affinity for phillipsite and ciinoptilolite structures. These zeolites are already used for ammonia removal from municipal piggery, and aquaculturai wastes. In the present paper, ammonia removal from aqtjacultural water from rccirculating systems has been tested, comparing different zeolites under laboratory conditions. Phillipsite and ciinoptilolite tuffs were effective in ammonia removal, while chabazitc tuff having a lower content of zeolitic material (50%) and lower affinity for ammonia showed that a lower temperature did not influence ion exchange capacity in any of the zeolites.
Application of zeolites in aquaculture industry: a review
Reviews in Aquaculture, 2016
Zeolites are microporous crystalline hydrated aluminosilicates, which have found various applications because of their very unique physicochemical characteristics such as ion exchange and adsorption-desorption properties. Significant progress has been made in recent years on applications of these inorganic adsorbents in different industries including agriculture, aquaculture, water and wastewater treatment, air purification and petrochemicals. This review article intends to summarize the published reports on the applications of natural, synthetic and modified zeolites in aquaculture industry. Application of zeolitic materials for water quality improvement of fish farms and fish transportation tanks by selective capturing of ammonia and toxic heavy metals and zeolite application as feed additive to enhance fish growth and promote their health and nutritional parameters are the most important discussed areas. According to the technical data that are discussed in this review, natural and synthetic zeolites should be considered as materials with tremendous potential of applications in the aquaculture industry. Considerable amounts of research works are under way to explore other opportunities for application of zeolites to benefit aquaculture industry.
Bulgarian Journal of Agricultural Science
The macrophytes enrich the water with oxygen and help to remove nutrients. The zeolite is also a natural way to combat pollution. The aim of this study was to investigate the effectiveness in waste water treatment process in RAS, applying filter with natural zeolites and macrophytic plants from genus Lemna and Elodea. The temperature and pH were measured daily with a portable combined meter in the newly constructed control and experimental RAS. Ammonium, nitrite, nitrate, total nitrogen and phosphor us were measured spectrophotometrically. At the end of the trial the fish were weighed and specific growth rate and FCR (feed conversion ratio) were calculated. The addition of zeolite and macrophytic plants as a part of filtration system of experimental RAS, decreased significantly the quantity of nitrogen and phosphorus compounds, compared to their amount in conventional one. The better water quality in experimental system, due to the presence in the filter of zeolites and macrophytic ...
Use of Zeolite Based Technology for Developing Low Carbon Aquaculture System
2014
Ammonia volatilization is a major process of N loss that affects the environment. Large quantum of ammonia emissions are from livestock production. The best way of capturing volatilized ammonia-N could be using zeolite as a good ion exchange medium before it gets either volatilized or nitrif ied. Thus captured ammonia-N could be used as a source of inorganic nitrogen in ponds to promote algal production without adding additional organic carbon and BOD. The present investigation was designed to study the zeolite based technology with an aim of developing a low carbon aquaculture system. The zeolite used for the study was a commercially available zeolite, (CLINZEX) which was a f ine powder (CEC 3.9-4 meq/g). The experiment was conducted to assess the difference between manure loaded system (control) and zeolite loaded system (treatment) in terms of water quality, TAN release and algal productivity. The difference between the BOD values recorded in both the controls and treatmental tanks using cowdug source of manure-N remained mostly above 10 ppm. All the treatments which received zeolite samples from Cowdug. The range of values of chlorophyll a (1029-5150 mg/m 3) recorded in the treatment tanks were higher than the values (54.6-1347 mg/m 3) of chlorophyll a in the control tanks. F-test analysis done using highest mean values of BOD, COD, TAN and Chlorophyll a showed a highly signif icant (P<0.01) variation between the treatment and control tanks and at the same time no signif icant variation was found between time intervals. High TAN release and its corresponding high algal production along with low organic load (BOD and COD) of zeolite loaded treatment tanks compared with low TAN content, low algal productivity and associated high organic load conf irms the use of zeolite for transferring manure ammonia in the form of inorganic nitrogen for developing low carbon aquaculture system. The nitrogen transferring mechanism adapted in this study not only avoided nitrogen loss but also could generate biogas, an additional income to farmer. The low carbon aquaculture system developed and low Carbon Foot Print of the product, enhances the value of production system and the products. Further, the low carbon loading and their values in the production process will endorse the zeolite based N loading method as a thruthful means in the tropical aquaculture of many species in the world.
International Letters of Natural Sciences
In this study, it was aimed to determine the effects of zeolite and bentonite on the ammonium adsorption at different temperatures. In this research three trial groups with 3 repetitions were created for three different water temperatures (18±0.1°C, 24±0.0°C, 27±0.0°C). Experimental groups were prepared by adding NH4+amount of 10.5 mg/l in 2 liters of water. After that, zeolite, zeolite+bentonite and bentonite were added into the bottles as 10 gram per liter. Water temperature, pH and TAN (Total Ammonium Nitrogen) values were determined during the trial period. At the end of trial TAN values at 27 °C were recorded as 10.103±0.11 mg/l, 9.227±0.13 mg/l and 7.933±0.17 mg/l in zeolite, zeolite+bentonite and bentonite groups, respectively. At the end of trial TAN values at 24 °C were recorded as 10.027±0.17 mg/l, 9.282±0.15 mg/l and 8.336±0.15 mg/l in zeolite, zeolite+bentonite and bentonite groups, respectively. At the end of trial TAN values at 18 °C were recorded as 9.012±0.28 mg/l, 7...
Effect of Zeolite on Water Ammonia Levels in Tilapia Cultivation with Recirculation System
2021
Culture of tilapia (Oreochromis niloticus) with high stocking density and feeding can cause a decrease in water quality due to the accumulation of metabolic waste such as ammonia which is toxic for fish rearing. A zeolite filter is needed which can reduce ammonia levels until it is not harmful to fish survival. This research was conducted in February-April 2020 at the Aquaculture Environmental Quality Laboratory, Fisheries and Marine Faculty of Riau University. The purposed of this study was to determine the effect of using zeolite on Ammonia (NH3) and determine the appropriate dose for Tilapia (Oreochromis niloticus) rearing. The research method was a Completely Randomized Design (CRD) one factor with 4 levels of treatment (P0: Control without the use of filters, P1: Use of zeolite 5.68 g/L, P2: Use of zeolite 11.37 g/L, P3: Use of zeolite 17.05 g/L). The appropriate treatment for Tilapia rearing is P3 (Zeolite 17.05 g/L) with TAN value is 0.2616 mg/L, Ammonia 0.0018 mg/L, TAN redu...
IOP Conference Series: Earth and Environmental Science, 2019
High density and high feeding volume are regarded as factors causing huge accumulations of Total Ammonia Nitrogen (TAN) in an aquaculture system. An uncontrolled TAN concentration in an aquaculture system can pose a threat to the reared organisms as an abrupt escalation of the toxic form of TAN (ammonia-NH3) may occur following the alteration of the water quality. Considering the potential of Gracilaria sp. and zeolite toward ammonia elimination, it would be a milestone interest to study the effect of Gracilaria sp and zeolite as an ammonia eliminator in aquatic environment. The result shows that Gracilaria sp. and zeolite significantly affect the reduction of TAN concentration (p < 0.05). The result shows that the reduction ranges from 0.101 to 1 ppm while the best treatment is treatment Cc (5 g/L Gracilaria sp. and 10 g/L zeolite) which can eliminate the TAN concentration by up to 100% (1 ppm) within 7 days. Pursuant to the result, it can be concluded that Gracilaria sp. and zeolite have the potential of being an efficient ammonia eliminator in an aquatic environment. Nonetheless, it is important to conduct further research with respect to the actual implementation of the ammonia eliminators in a real aquaculture system.
Ammonia removal from fish pond water using sodium hydroxide modified zeolite
2015
The excessive amount of ammonia could lethal for fish in aquaculture. Some of previous studies have been investigated that zeolite is very effective adsorbent to adsorb ammonium ion from water surface. Recently, the natural zeolite modified by sodium chloride to enhance the active site from the adsorbent, however it could adsorb much more ammonium ions from water. In this study, natural and modified zeolites were used to remove ammonium ions from NH4Cl synthetic solution and Koi pond water. The objective of present study was to investigate the ability of zeolite to remove ammonium by modified zeolite with sodium hydroxide which is a strong base. The modification of zeolite was conducted using sodium hydroxide solution at 75oC for 24 h. Langmuir, Freundlich, Sips, and Toth equations with their temperature dependent forms were used to represent the adsorption equilibria data. The Langmuir and its temperature dependent forms could represent the data better than other models. The pseudo...
2015
Background: Surface water and groundwater pollution with various forms of nitrogen such as ammonium and nitrate ions is one of the main environmental risks. The major objectives of this study were to evaluate the capacity of natural zeolite (clinoptilolite) to remove NO3– and NH4+ from polluted water under both batch and column conditions.Methods: The laboratory batch and column experiments were conducted to investigate the feasibility of clinoptilolite as the adsorbent for removal of nitrate (NO3–) and ammonium (NH4+) ions from aqueous solution. The effects of pH, clinoptilolite dosage, contact time, and initial metal ion concentration on NO3– and NH4+ removal were investigated in a batch system.Results: Equilibrium time for NO3– and NH4+ ions exchange was 60 minutes and the optimum adsorbent dosage for their removal was 1 and 2.5 g/L, respectively. The adsorption isotherm of reaction (r> 0.9) and optimum entered concentration of ammonium and nitrate (30 and 6.5 mg/L, respective...