2018/12/24/ · Due to the health and environment impacts of fossil fuels utilization, biofuels have been investigated as a potential alternative renewable source of energy. Bioethanol is currently the most produced biofuel, mainly of first generation, resulting in food-fuel competition. Second generation bioethanol is produced from lignocellulosic biomass, but a
2022/4/27/ · Paper Mill Sludge (PMS) is the organic residual obtained from different stages of the paper production process, including the selection, squeezing, screening, deinking, washing, refining, releasing color and bleaching processes and this sludge contains water, fiber, different organic compounds, several inorganic minerals and mineral fillers
2014/11/15/ · Conclusions. Anaerobic digestion of pulp and paper mill waste at full-scale is currently confined to the treatment of a few selected types of effluent, and the resulting biogas is commonly burned to produce steam and electricity. Full-scale digesters for mill-derived sludges (biosolids) are almost non-existent.
2021/6/15/ · 1. Introduction. Paper mill sludge (PMS) is the rejected material generated from digester and paper machines in pulp and paper manufacturing. It is reported that one metric ton paper production gives rise to 40–50 kg dry sludge, and as much as 18.25 and 4–5 million tons of PMS are generated per year worldwide and in the U.S., respectively (de
2021/4/29/ · A wide variety of biomass is available all around the world. Most of the biomass exists as a by-product from manufacturing industries. Pulp and paper mills contribute to a higher amount of these biomasses mostly discarded in the landfills creating an environmental burden. Biomasses from other sources have been used to produce different
Paper mill sludge (PMS) is waste in the paper processing industry (8,22). Total annual production in North America is approximately 10 million tons, and in Portugal 35,000 dry tons (4,20). Until recently, most of the sludge has been discarded in landfill due to increasing scarcity of landfills, high tipping fees, and increasing environmental
(46.7 wt%, Table 1), and was termed high ash paper waste sludge (HAPWS), and was supplied by a recycled tissue paper mill, Kimberly Clark Enstra. The third type of PWS had a medium AC (20.5 wt%, Table 1) and was termed medium ash paper waste sludge (MAPWS), and was supplied by a recycled corrugated cardboard mill, Mpact Springs.
1. Introduction. Paper mill sludge (PS) is a significant byproduct generated in the pulp and paper industry. With the increasing demand for paper and board products, the global annual production of PS exceeds 400 million tons (Feng et al., 2022).PS primarily consists of cellulose fibers, lignin, and inorganic fillers like CaCO 3 and Kaolin, thus it has a great potential for
2022/11/15/ · Pulp and paper mill excess sludge (PPES) is a type of excess sludge discharged from the wastewater treatment plant of the pulp and papermaking industry. The organic content of PPES is about 50–65 %, and the main components are microbes and lignocellulose. PPES is considered as a critical potentially renewable resource (Luo et al.,
A pioneering solution has been developed to convert cellulose fibre-rich waste from pulp and paper mill operations into ethanol using a specialised fermentation process. Ethanol is a versatile
2020/11/20/ · Sludge, both primary and secondary, is the solid residue following effluent treatment at pulp and paper mills. Primary sludge (PS) is collected at the mill’s primary clarifier and comprises short fibers (fines) that cannot be retained on the paper machine, together with clays and fillers that are lost due to incomplete solid-liquid
2024/1/26/ · This review explores circular economy principles in regard to ethanol production from paper-mill sludge. Environmental sustainability and renewability over fossil fuels make second generation ethanol an attractive energy source in a rapidly growing population and consumption world. Paper sludge (PS), a by-product of the pulp and paper
2010/10/1/ · Two recombinant xylose‐fermenting microbes under optimal conditions achieved a 19% higher overall conversion of paper sludge to ethanol than the non‐xylose utilizing S. cerevisiae D5A at its optimal process temperature of 37°C. Simultaneous saccharification and co‐fermentation (SSCF) of waste paper sludge to ethanol was
2016/1/1/ · ABE fermentation of paper sludge by Clostridium acetobutylicum required partial removal of ash in PS to enhance its enzymatic digestibility. Paper mill sludge has been evaluated as a feedstock for ethanol and lactic acid production, and results have been positive (Budhavaram and Fan, 2009, Kang et al., 2011, Lark et al., 1997, Marques et al ...
Paper sludge with a high ash content has been reported to have an additional advantage for butanol fermentation, while other studies have found that kraft paper mill sludge requires a partial removal of ash to enhance its enzymatic digestibility in ABE fermentation using C. acetobutylicum (Yang et al. 2013; Gottumukkala et al. 2016; Guan et al