Browsing by Author "Cardoso, Jonathan"
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- Analysis of the feasibility of the use as fertilizers, of leachates from a mechanical biological treatment plant for municipal solid wastePublication . Cardoso, Jonathan; Rodrigues, Bárbara; Gomes, Helder; Brito, PauloThe main environmental issue associated with the compost production is the production of a liquid leachate. However, compost leachate may also be considered as a source of nutrients and used as fertilizer. Chemical properties were determined for a raw leachate from a mechanical biological treatment plant for municipal solid waste, to check if it meets the adequate requirements for using as commercial fertilizer according to the proposal of regulation of the European Parliament of 2016, for fertilizers. This study intends to access if the leachate can be used as potential source for fertilizers. It qualitatively meets the requirements established for the composition of commercial fertilizers and the production cost of leachate as raw material is low. Preliminary results showed low concentrations of heavy metals and suitable amounts of nutrients after the concentration of the leachate by simple batch distillation.
- Analysis of the feasibility of the use as fertilizers, of leachates from a mechanical biological treatment plant for municipal solid wastePublication . Cardoso, Jonathan; Rodrigues, Bárbara; Gomes, Helder; Brito, PauloThe main environmental issue associated with the compost production is the production of a liquid leachate. Therewith, compost leachate may also be considered as a source of nutrients and used as fertilizer. The main pollution issue associated with this compost treatment is the production of a liquid leachate that is characterized by high organic load. Although municipal waste compost leachate is one of the problems of compost production, it may be considered as a source of nutrients. Compost leachate from municipal wastes contains carbon, nitrogen, phosphorus, potassium and trace elements that can be used as nutrients by plants. The advantages of the use of organic wastes such as compost leachate as fertilizers are evident. Their use would reduce the consumption of commercial fertilizers which need in their production high cost and energy. Leachate is a waste product, which means that no direct production costs are associated. The use of leachate in agriculture also means that the costs at waste treatment plants can be reduced, since processes for nitrogen and phosphorus removal would not be necessary. In that point of view, this work aims to determine the chemical properties for a raw leachate from a mechanical biological treatment plant for municipal solid waste, to check if it meets the adequate requirements for using as commercial fertilizer according to the proposal of regulation of the European Parliament of 2016, for fertilizers. This study intends to assess if the leachate can be used as potential source for fertilizers. It qualitatively meets the requirements established for the composition of commercial fertilizers and the production cost of leachate as raw material is low. Preliminary results showed low concentrations of heavy metals and suitable amounts of nutrients after the concentration of the leachate by simple batch distillation.
- Application of adsorbent materials to remove heavy metals in leachate from a municipal landfill treatment plantPublication . Cardoso, Jonathan; Fernández Delgado, Marina; Vertonha, Maria T.; Cabral, David; Silva, Adriano S.; Roman, Fernanda; Díaz de Tuesta, Jose Luis; Arrobas, Margarida; Coca, Mónica; Brito, Paulo; Gomes, HelderTo treat and reduce the heavy metals content in leachate byproducts from biological treatment in a waste treatment plant, adsorption is one of the most efficient techniques is the focus discussed in this work due the composition of those liquids which contains nutrients but also hazards. The use of different adsorbents such as activated carbon, clays, and ion-exchange resins, is studied to adequate requirements for use as commercial fertiliser according to the regulations. This study concluded that the TOC presented in the leachate fulfil the EU requirements after a simple concentration process. The experimental design results obtained for heavy metals removal from the leachate show that a suitable combination of pH of 9 and ion exchange resins, especially Lewatit TP207 with a mass ratio of 0.4 g of resin per 20 mL of leachate, could reach the heavy metal content objectives. However, the leachate cannot be used as a commercial fertiliser using only this treatment because of the lack of Cr VI specific determination, which requires a crucial and deeper study, using as a starting point the optimal conditions obtained in this work.
- Development of polyethersulphone mixed matrix zeolite membranes functionalized with ionic liquids and deep eutectic solvents for CO2 separationPublication . Cardoso, Jonathan; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M.Mixed matrix membranes (MMM) combine the flexibility of polymers and the strength and durability presented by inorganic solids
- Heavy metals removal of leachates from a mechanical biological municipal solid waste treatment plant for use as fertilizersPublication . Cardoso, Jonathan; Vertonha, Maria Thais; Roman, Fernanda; Silva, Adriano S.; Díaz de Tuesta, Jose Luis; Brito, Paulo; Gomes, HelderLeachates produced from treatment plants contains carbon, nitrogen, phosphorus, potassium and trace elements. This work aims to develop heavy metals removal processes using solid adsorbents synthetized at CIMO and LSRE-LCM laboratories at Polytechnic Institute of Bragança, such as activated carbon produced from a compost material from the same treatment plant and modified clays obtained through a partnership with a Kazakhstan institution, to adequate the leachate from the composting line of a mechanical and biological treatment facility, into commercial fertilizers which fit the requirements of the European Legislation. Preliminary results show that the adsoption materials promoted a reduction in the heavy metals content, but this reduction also affected the organic carbon content. However, the activated carbons presented a better potencial for heavy metals removal.
- Heavy metals removal of leachates from a mechanical biological municipal solid waste treatment plant for use as fertilizersPublication . Cardoso, Jonathan; Vertonha, Maria Thais; Roman, Fernanda; Silva, Adriano S.; Díaz de Tuesta, Jose Luis; Brito, Paulo; Gomes, HelderLeachates produced from treatment plants contains carbon, nitrogen, phosphorus, potassium and trace elements. This work aims to develop heavy metals removal processes using solid adsorbents synthetized at CIMO and LSRE-LCM laboratories at Polytechnic Institute of Bragança, such as activated carbon produced from a compost material from the same treatment plant and modified clays obtained through a partnership with a Kazakhstan institution, to adequate the leachate from the composting line of a mechanical and biological treatment facility, into commercial fertilizers which fit the requirements of the European Legislation. Preliminary results show that the adsoption materials promoted a reduction in the heavy metals content, but this reduction also affected the organic carbon content. However, the activated carbons presented a better potencial for heavy metals removal.
- Heavy metals removal on leachate for use as fertilizersPublication . Cardoso, Jonathan; Vertonha, Maria Thais; Cabral, David; Silva, Adriano S.; Roman, Fernanda; Díaz de Tuesta, Jose Luis; Arrobas, Margarida; Brito, Paulo; Gomes, HelderMunicipal landfill leachates typically contain high ammonium and organic concentration which could contribute to its use in agriculture, leading to the reduction of costs for the respective waste treatment plants. However, due to the nature of the leachates, they may contain phytotoxic substances. The landfillleachate samples differ by many factors such as the composition of the treated waste, elapsed time, geochemical and weather conditions [1-3]. Taking into account these considerations, leachate samples from a storage tank at the "Residuos do Nordeste, ElM" mechanical and biological treatment plant, were collected in February 2019, and stored :at 4°C. The leachate samples were processed using activated carbon adsorbents produced from the compost of the referred company, and H2S04 activated clays obtained from a partnership with a Kazakhsta1n institution. The leachate samples were mixed with the adsorbents for 48 hours, centrifugated and the supernatant was reserved. TOC analysis in a Shimadzu TOC-L equipment and metals quantification by atomic absorption spectroscopy using a Varian SpectrAA 220 apparatus were carried out. :Selected results are presented in Fig. 1. The original leachate presents an organic carbon content closer to the requirements of the EU legislation for liquid organo-mineral fertilizers. The activated carbon promoted greater TOC removal in comparison with the activated clays. Both materials showed interaction with the heavy metals. However, Cr still remains present in higher conten1ts and K presents lower values than the legislation requirements. Overall, the activated carbons presented a greater potential for heavy metals removal. However, ion-exchange resins will be tested for a more efficient heavy metals removal to minimize possible secondary elimination of components sue:h as nutrients and organic carbon.
- Investigation of the viability of converting a leachate from a mechanical biological treatment plant for municipal solid waste into fertilizersPublication . Cardoso, Jonathan; Rodrigues, Bárbara; Gomes, Helder; Brito, PauloThe main environmental issue associated with the compost production is the production of a liquid leachate. However, the leachate may also be considered as a source of nutrients and used as fertilizer. The main concern is loading the soil with metals that can result in increased metal content of crops. This work intends to determine the physical and chemical properties of a raw leachate from a mechanical biological treatment plant for municipal solid waste, to assess the possibility of converting it into as commercial fertilizer which meets to the specifications required in the proposal of regulation of the European Parliament of 2016, for fertilizers. In a preliminary study, it is concluded that the leachate qualitatively meets the requirements established for the composition of commercial fertilizers and the production cost of leachate as raw material is low.
- Investigation of the viability of converting a leachate from a mechanical biological treatment plant for municipal solid waste into fertilizersPublication . Cardoso, Jonathan; Rodrigues, Bárbara; Gomes, Helder; Brito, PauloThe main environmental issue associated with the compost manufacture process is the production of a waste liquid leachate very complex in terms of composition. But, compost leachates may also be considered as a source of nutrients and can be converted to fertilizers. Physical and chemical properties were determined for a raw leachate from a mechanical biological treatment plant for municipal solid waste, to evaluate if it meets suitable requirements for using as commercial fertilizer according to the proposal of regulation of the European Parliament of 2016. So, this study intends to assess if the leachate can be used as a potential source for fertilizers. It qualitatively meets the requirements established for the composition of commercial fertilizers. Furthermore, the production costs of the leachate as a raw material are low since it is a waste effluent. Initial results showed low concentrations of some heavy metals and acceptable amounts of nutrients after concentration by batch distillation.
- Optimization and performance studies of PES/SAPO-34 membranes for CO2/N2 gas separationPublication . Cardoso, Jonathan; Fonseca, Joel P.; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M.SAPO-34 nanocrystals were prepared and used as inorganic filler in polyethersulfone (PES) membranes. The influence of preparation conditions on permeation properties of CO2 and N2 gases and CO2/N2 selectivity were studied to achieve the highest separation performance possible for this mixed-matrix membrane. Gas permeation properties of PES/SAPO-34 MMMs with different contents of SAPO-34, PES and initial film thickness were investigated according to a full factorial design of experiments (DOE). The permeation tests and DOE results revealed that the optimized conditions to maximize the selectivity for PES/SAPO-34 are: composition of 18.5 wt % of SAPO-34, 15 wt% of PES, and a casted film thickness of 400 μm resulting in a CO2/N2 selectivity of 30.85. The findings showed that a multivariable model was validated and able to predict the selectivity with determination coefficient R2 of 0.969 and the results are in accordance with values presented in literature for PES/ SAPO-34 membranes. An economic analysis shows that the commercial grade price for the optimized membrane is EUR 9.43/m2 which represents around 2.2 times cheaper than polymeric commercial membranes.