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  • 1.
    Hansson, Henrik
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Marques, Marcia
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). Rio de Janeiro State Univ, Brazil.
    Laohaprapanon, Sawanya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Electrocoagulation coupled to activated carbon sorption/filtration for treatment of cleaning wastewaters from wood-based industry2014Ingår i: Desalination and Water Treatment, ISSN 1944-3994, E-ISSN 1944-3986, Vol. 52, nr 28-30, s. 5243-5251Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The objective of this investigation was to study the use of a coupled treatment (electrocoagulation(EC) and sorption/filtration treatment) with different sequencing to reduce the organic pollutantsmeasured as chemical oxygen demand (COD) of five highly polluted wastewater streamsgenerated after washing surfaces and machinery in the wooden floor industry and to evaluate,how different sequencing of these treatment units affects the overall system efficiency. On thebasis of preliminary studies, an EC reactor (1.0 L) was constructed with monopolar electrodes inparallel connection in an array of four Al electrodes with surface area of 93.2 cm2and an appliedcurrent density of 161 A m–2. This reactor was coupled to a sorption/filtration unit with coalactivated carbon. The EC reactor was tested in two different sequences (before and after the sorption/filtration unit). The overall COD reduction varied from 2% ± 0.5% to 77% ± 2.9%, dependingon the sequence and the treated wastewater stream. The best result from efficiency andoperational viewpoints was obtained with the EC reactor placed after the sorption/filtrationcolumn. The increase in efficiency is likely to be due to the removal by sorption in the activatedcarbon of compounds that interfere with EC. Additionally, as desired, the use of EC before thesorption unit extended the activated carbon lifetime.

  • 2.
    Hogland, William
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Marques, Marcia
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Kaczala, Fabio
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Laohaprapanon, Sawanya
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Strömblad, Anna
    Erlandsson, Åke
    Nilsson, Malena
    Peterson, Ana
    Wiberg, Camila
    Ingdahl, Helen
    Charlotta, Persson
    Planning and Communication for Development of an Integrated Approach for Industrial Wastewater Treatment System in the Wood-industry Sector-Process Water, Stormwater and Leachate.2009Ingår i: CISA, Cagliari, Italy, 2009Konferensbidrag (Refereegranskat)
  • 3.
    Hogland, William
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Marques, Marcia
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Laohaprapanon, Sawanya
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Kaczala, Fabio
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Removal of Organic Pollutants from Industrial Cleaning Wastewaters Using a Combined Sedimentation and Packed-bed Column Treatment2010Konferensbidrag (Refereegranskat)
  • 4.
    Ibrahim, Muhammad Asim
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Laohaprapanon, Sawanya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Rupar-Gadd, Katarina
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET).
    Wiman, Bo L.B.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Mitigating the emissions released from spontaneous fires at biomass storages: A footstep towards sustainability2015Ingår i: 23rd European Biomass Conference and Exhibition, Vienna, Austria, 1-4 June 2015, 2015, Vol. 23, s. 1550-1557Konferensbidrag (Refereegranskat)
    Abstract [en]

    Fires at the  material storages sites of manucipal and industrial sectors are a major environmental risk and have increased significantly. Toxic emissions released from such open fires have severe environmental and health consequences. Considering that it is not possible to install any unit operation to control the emissions released from such open fires, the possibilities to employ natural vegetation to act as a sink for aerosol particles released from open fires was investigated. A series of tests was conducted in a controlled wind tunnel environment. Smoke was generated in a smoke-aerosol generator and measurements of smoke concentrations upwind and downwind of “green filter packs” (vegetation filters) were made. Measurements involved laser-based particle counters, two-stage Nuclepore filter systems, and Solid Phase Microextraction (SPME) techniques followed by Gas Chromatography-Mass Spectrometry (GC-MS). The main objective of the work was to illustrate ways to design experiments that can assist in the study of vegetation as “pollution screens”. Our observations and findings imply that several refinements to the experimental design will be needed, including with respect to methods for assessing the distribution of particle number and mass as a function of particle size.

  • 5.
    Laohaprapanon, Sawanya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Wastewater generated by the wooden floor industry: Treatability investigation applying individual and coupled technologies2013Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    During the last half-century a growing concern has taken place in the world regarding water shortage and public health associated to water pollution. Safe discharges of industrial effluents and water reuse within the industry have been encouraged and several initiatives have promoted the development of wastewater treatment technologies with the main focus on industrial sectors that generate large volumes of wastewater. On the other hand, searching for onsite technological options to treat small volumes of highly polluted wastewaters generated by industrial sectors that have no water in their production processes (i.e. wooden floor and furniture industry) has been neglected. To minimize and prevent environmental effects through innovative approaches, onsite treatment options for wastewater generated by cleaning/washing activities in a wooden floor industry in Sweden have been investigated. It was found that different wastewater streams generated after cleaning/washing of machinery and surfaces at different stages of the wooden floor production can pose negative effects to aquatic organisms. Since they are intermittently and manually generated, these wastewater streams have high variability both in volumes and chemical composition. During treatability studies, equalization/sedimentation process was found to be an important pre-treatment step responsible for reduction of chemical oxygen demand (COD) of about 19%. Sorption/filtration with activated carbon and anaerobic biological treatment were found to be technically feasible for both COD and formaldehyde removal. Wood fly ash (waste material with negligible cost) showed moderate sorption efficiency as compared to commercial activated carbon and leaching of secondary pollutants might prevent the use of this material unless pretreatment is carried out. In the anaerobic treatment process, the treatment efficiency of COD in an anaerobic baffled reactor  (ABR) was decreased 50% when the C/N ratio dropped below 3. A successful treatment of the cleaning wastewater with soluble COD removal of about 83% and FA removal higher than 99% was achieved by the ABR operated with hydraulic retention time (HRT) of 5 days. Mole ratio of Mg:N:P and pH were key parameters for ammonium precipitation in the wastewater. At Mg:N:P of 1:1:1 or higher and pH of 8.0, the highest ammonium removal (83%) was achieved. Combinations of treatment processes (e.g. sorption and electrocoagulation or biological treatment and chemical precipitation) improved the quality of the final effluent. However, process optimization is still required in order to improve even more the quality of the final effluent and reduce operation and maintenance costs. From the water reuse/recycle perspective, the application of advanced oxidation in combination with the above-mentioned processes seems to be a promising approach.

  • 6.
    Laohaprapanon, Sawanya
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    de Sa Salomao, Andre Luis
    Department of Sanitary and Environmental Engineering, Rio de Janeiro State University (UERJ).
    Marques, Marcia
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Hogland, William
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Toxicity evaluation in wastewater treatment process2012Konferensbidrag (Övrigt vetenskapligt)
  • 7.
    Laohaprapanon, Sawanya
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Kaczala, Fabio
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Salomon, Paulo
    Deapartment of Marine Biology , Federal University of Rio de Janeiro (UFRJ).
    Marques, Marcia
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Hogland, William
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Toxicity on the Microalgae Desmodesmus subspicatus: Wastewater Generated during washing procedures in a Wood-floor industry2012Konferensbidrag (Övrigt vetenskapligt)
  • 8.
    Laohaprapanon, Sawanya
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Kaczala, Fabio
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Salomon, Paulo
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV. Department of Marine Biology , Institute of Biology, Federal University of Rio de Janeiro (UFRJ) , Rio de Janeiro , Brazil.
    Marques, Marcia
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Hogland, William
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Wastewater generated during cleaning/washing procedures in a wood-floor industry: toxicity on the microalgae Desmodesmus subspicatus2012Ingår i: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 33, nr 21, s. 2439-2446Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In industries based on dry processes, such as wood floor and wood furniture manufacture, wastewater is mainly generated after cleaning of surfaces, storage tanks and machinery. Owing to the small volumes, onsite treatment options and potential environmental risks posed to aquatic ecosystems due to discharge of these wastewaters are seldom investigated. In the present study, the effects of cleaning wastewater streams generated at two wood floor production lines on Desmodesmus subspicatus were investigated. The microalgae was exposed to different wastewater concentrations (100, 50, 25, 12.5 and 6.25% v:v) and the algae growth evaluation was based on in vivo chlorophyll fluorescence, cell density, cell size (number of cells/colony) and cell ratio (length/width). Inhibitory effects of the tested wastewaters on the microalgae were positively related to concentration and negatively related to exposure time. The EC50,24 h of blade cleaning wastewater (BCW) and floor cleaning wastewater (FCW) were 3.36 and 5.87% (v:v), respectively. No negative effect on cell colony formation was caused by BCW, whereas an increase of 90% unicellular cells was observed in FCW concentrations below 50% (v:v). At the lowest concentration (3.13% v:v) where no growth inhibition was observed, both wastewater streams caused changes in cell dimensions by increasing cell length and width. To conclude, wastewaters generated during cleaning procedures in the wood floor industries can have severe environmental impacts on aquatic organisms, even after high dilution. Therefore, these wastewaters must be treated before being discharged into water bodies.

  • 9.
    Laohaprapanon, Sawanya
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Marques, Marcia
    Rio de Janeiro State University, Brazil.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Anaerobic baffled reactor coupled with chemical precipitation for treatment and toxicity reduction of industrial wastewater2014Ingår i: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 35, nr 2, s. 154-162Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study describes the reduction of soluble chemical oxygen demand (CODs) and the removal of dissolved organic carbon (DOC), formaldehyde (FA) and nitrogen from highly polluted wastewater generated during cleaning procedures in wood floor manufacturing using a laboratory-scale biological anaerobic baffled reactor followed by chemical precipitation using MgCl2·6H2O+Na2HPO4. By increasing the hydraulic retention time from 2.5 to 3.7 and 5 days, the reduction rates of FA, DOC and CODs of nearly 100%, 90% and 83%, respectively, were achieved. When the Mg:N:P molar ratio in the chemical treatment was changed from 1:1:1 to 1.3:1:1.3 at pH 8, the NH4+ removal rate increased from 80% to 98%. Biologically and chemically treated wastewater had no toxic effects on Vibrio fischeri and Artemia salina whereas chemically treated wastewater inhibited germination of Lactuca sativa owing to a high salt content. Regardless of the high conductivity of the treated wastewater, combined biological and chemical treatment was found to be effective for the removal of the organic load and nitrogen, and to be simple to operate and to maintain. A combined process such as that investigated could be useful for on-site treatment of low volumes of highly polluted wastewater generated by the wood floor and wood furniture industries, for which there is no suitable on-site treatment option available today.

  • 10.
    Laohaprapanon, Sawanya
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Marques, Marcia
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Hogland, William
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Removal of Organic Pollutants from Wastewater Using Wood Fly Ash as a Low-Cost Sorbent2010Ingår i: CLEAN - Soil, Air, Water, ISSN 1863-0650, E-ISSN 1863-0669, Vol. 38, nr 11, s. 1055-1061Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study untreated and treated wood fly ash (WA) was used as a low cost sorbent in batch sorption tests to investigate the removal of organic pollutants from a real wastewater generated by cleaning/washing of machinery in a wood laminate floor industry in Sweden The experiments focused on the effect of the WA dosage and particle size on the removal efficiency for organic compounds With a WA dosage of 160 g L-1 and a particle size less thin 1 mm the reductions of chemical oxygen demand (COD) biologic oxygen demand and total organic carbon were 37 +/- 0 4 24 +/- 0 4 and 30 +/- 0 3% respectively Pre treatment of WA with hot water improved the COD removal efficiency by absorption from 37 +/- 0 4 to 42 +/- 1 6% when the same dosage (160 g L-1) was applied Sorption isotherm and sorption kinetics for COD using untreated WA can be explained by Freundlich isotherm and pseudo-second-order kinetic models Intra particle diffusion model indicates that pore diffusion is not the rate limiting step for COD removal Based on the experimental data WA could be used as an alternative low cost sorption media/filter for removal of organic compounds from real industrial wastewater.

  • 11. Laohaprapanon, Sawanya
    et al.
    Marques, Marcia
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Hogland, William
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Studies on treatment of urea-formaldehyde based wastewater using anaerobic baffled reactor (ABR): COD and formaldehyde removal2012Konferensbidrag (Övrigt vetenskapligt)
  • 12.
    Laohaprapanon, Sawanya
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Marques, Marcia
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Packed-Column of Granular Activated Carbons for Removal of Chemical Oxygen Demand from Industrial Wastewater2013Ingår i: CLEAN - Soil, Air, Water, ISSN 1863-0650, E-ISSN 1863-0669, Vol. 41, nr 3, s. 244-250Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In the present study, chemical oxygen demand (COD) removal by packed-columns of activated carbon (AC) derived from two different materials (coal activated carbon, CAC and wood activated carbon, WAC) is reported as part of an on-site wastewater treatment system for handling small volumes of wastewater generated at wood-floor industries for which there are no proper on-site treatment options available in the market. The performance of the sorbents, the effect of bed depth (0.19 and 0.57 m) and volumetric load (0.10 and 0.24 m h−1) on the breakthrough curve of sorption systems were studied. The results indicated the feasibility of using both ACs to treat these wastewaters. At the bed depth (0.57 m), volumetric load (0.24 m h−1), and 30% breakthrough, CAC and WAC showed treatment capacity of 40.5 L kg−1 in 250 h and 23.8 L kg−1 in 63 h, respectively. This indicated that CAC requires longer retention times to reach a performance similar to WAC. The experimental data was fit into the bed depth-service time model showing that under the same conditions, CAC had higher maximum sorption capacity (N0) than WAC. Moreover, thermal regeneration at 500°C temperature could be a cost-effective procedure since the reuse of spent AC through such regeneration process for further treatment could still achieve 90% of the initial sorption capacity, reducing then costs for the use of new sorbents and also the need for waste disposal.

  • 13.
    Rupar-Gadd, Katarina
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET).
    Wiman, Bo
    Ibrahim, Muhammad Asim
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Laohaprapanon, Sawanya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    A theoretical and experimental framework for the study of vegetation as a screen against aerosol pollution2014Rapport (Övrigt vetenskapligt)
    Abstract [en]

    It is well known that vegetation acts a sink for aerosol particles, with the particle-capture efficiency strongly related to vegetation characteristics (such as dimensions of needles and leaves) and to  particle size and aerodynamic conditions. However, there is a need for studies of ways to harness this sink capacity for constructing “green screens” to help reduce aerosol-particle concentrations, and thus health effects, in downwind residential areas. In this report we present a simplified mathematical model for the particle-capture processes involved and use results of model simulations to explore ways to address the problem through experiments with vegetation-filter components (“green filter packs”) placed in a windtunnel. Because of the exploratory nature of our work, the very limited logistics available, and the severe time constraints for the work (a few weeks only were available) the report is shaped as a kind of “scientific narrative” (rather than as a traditional technical paper). A series of tests is described wherein steps are taken towards practical implementation of experimental designs and procedures  based on a simple smoke-aerosol generator and measurements of smoke concentrations upwind and downwind of “green filter packs”. Measurements involve laser-based particle counters, two-stage Nuclepore filter systems, and Solid Phase Microextraction (SPME) techniques followed by Gas Chromatography-Mass Spectrometry. The main objective of the work was thus to illustrate ways to design experiments – rather than perform full-fledged experimental work – and to show how experimental data can be processed and used to assist in the study of vegetation as “pollution screens”. Despite the very limited time available for the work, the results show that our experimental approach is able to generate relevant information; for instance, a study of the particle-filtration capacity of a “green filter pack” consisting of an arrangement with Scots pine needles yielded interesting data.  Also, the  study suggests opportunities for more systematic comparisons between theory and practice, inasmuch it showed how, in principle, parameters involved in the mathematical model can be quantified. The SPME tests also provided interesting information with respect to chemical characteristics of the smoke-aerosol that was generated for the experiments. However, the tests with Nuclepore-filter sampling as well as the SPME applications showed needs for improving the smoke-generation method so that high and stable smoke-aerosol concentrations can be maintained over long periods (several hours).

     

     

    Our observations and findings imply that several refinements to the experimental design will be needed, including with  respect to methods for assessing the distribution of particle number and mass as a function of particle size (in the present study, the distribution is indicated by two particle-size classes only, 0.5 to 5 μm and >5 μm). Several other needs for improving the modelling as well experimental approach are also discussed in the report. Finally, a few observations on the needs for field-based studies are made together with remarks on the implications of the multi-disciplinary nature of this kind of work, with is linkages to the broader air-pollution context.

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