PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 7, Number 1, 2021
drying. In this study, the influence of drying conditions on the structure and properties of coating layers based on natural pigments (clay) and polymer binders (butadiene acrylonitrile latex) has been analyzed. Using a laboratory rod Mayer device, the coatings were applied as thin layer (about 15 – 16 g/m2) on the paper surface and samples of coated paper were dried at 20 and 105 °C temperatures. The optical, structural, and water absorption properties of the coating layer were evaluated by the measurement of gloss, opacity, void fraction, light scattering, and contact angle. The obtained results highlighted that both the drying temperature and latex content in the coating color have a synergic effect on the coated paper quality ENVIRONMENT “ Metagenomic analysis for profiling of microbial communities and tolerance in metal-polluted pulp and paper industry wastewater ”, Pooja Sharma, Sonam Tripathi & Ram Chandra, Bioresource Technology , 324, March 2021, 124681. This work aimed to study the profiling and efficiency of microbial communities and their abundance in the pulp and paper industry wastewater, which contained toxic metals, high biological oxygen demands, chemical oxygen demand, and ions contents. Sequence alignment of the 16S rRNA V3-V4 variable region zone with the Illumina MiSeq framework revealed 25356 operating taxonomical units (OTUs) derived from the wastewater sample. The major phyla identified in wastewater were Proteobacteria, Bacteroidetes, Firmicutes, Chloroflexi, Actinobacteria, Spirochetes, Patesibacteria, Acidobacteria, and others including unknown microbes. The study showed the function of microbial communities essential for the oxidation and detoxifying of complex contaminants and design of effective remediation techniques for the re-use of polluted wastewater. Findings demonstrated that the ability of different classes of microbes to adapt and survive in metal-polluted wastewater irrespective of their relative distribution, as well as further attention can be provided to its use in the bioremediation process. “ Efficiency of pulp and paper industry in the production of pulp and bioelectricity in Brazil ”, Andres Susaeta & Fabricia Gladys Rossato, Forest Policy and Economics , 128, July 2021, 102484. We examine the efficiency of Brazilian pulp and paper companies in the production of pulp and bioelectricity using an output-oriented data envelopment analysis. We assume that pulpwood volume, energy consumption, installed capacity and number of workers are the inputs to generate pulp and bioelectricity. We conduct this analysis by first determining the traditional efficiency scores, and secondly calculating a composite index of efficiency to rank the performance of pulp and paper companies. We also conduct a post-efficiency analysis to gauge the impacts of externalities and other related variables on the efficiency in pulp and bioelectricity production. Our results suggest that pulp and paper companies are efficient in pulp and bioelectric production, reaching an average efficiency and composite index of efficiency of 0.9776 and 0.8291, respectively. The post-efficiency analysis suggests that pulp and paper companies could minimally decrease their adjusted efficiencies by increasing the total forest area, power capacity, and outsourced employment. On the other hand, the adjusted efficiency in the production of pulp and bioelectricity might not be statistically impacted by higher socioeconomic levels. “ Unlocking the potential of pulp and paper industry to achieve carbon-negative emissions via calcium looping retrofit ”, Mónica P.S. Santos, Vasilije Manovic & Dawid P.Hanak, Journal of Cleaner Production , 280, Part 1, 20 January 2021, 124431. Pulp and paper is considered to be the fourth most energy-intensive industry (EII) worldwide. However, as most of the CO2 emissions are of biomass origin, this sector has
Technical Abstracts
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