2021/6/15/ · 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
2023/8/20/ · A sustainable industrial future involves the exploitation of renewable resources to obtain a wide diversity of products and energy and the decrease of waste generation. Primary sludge (PS) from pulp and paper mills is a lignocellulosic residue mainly consisting of cellulose and hemicelluloses that can be converted to bioethanol. In the
2013/8/28/ · One advantage of using paper mill sludge is that it requires no pretreatment, so it can be directly subjected to enzymatic hydrolysis and/or fermentation (Kang et al. 2010;Shi et al. 2015), and a
2021/7/12/ · After 6 months of operation, the sludge accumulation in the UASB-septic tank was 1.5 L, representing approximately 3% of the reactors’ effective volume. Since solids removal decreases drastically when accumulated sludge fills more than 30% of the tank (EPA 2002), the reactor should be desludged approximately every 3 years.
2024/2/1/ · Anaerobic fermentation is widely installed to recovery valuable resources and energy as CH 4 from waste activated sludge (WAS), and its implementation in developing countries is largely restricted by the slow hydrolysis, poor efficiency, and complicate inert components therein. In this study, enzyme-enhanced fermentation was conducted to
Acetone–butanol–ethanol production from Kraft paper mill sludge by simultaneous saccharification and fermentation Wenjian Guana, Suan Shia, Maobing Tub,c,⇑, Yoon Y. Leea a Department of Chemical Engineering, Auburn University, 212 Ross Hall, Auburn, AL 36849, United States bDepartment of Biomedical, Chemical and Environmental
2020/9/8/ · Paper mill sludge (PMS) solids are predominantly comprised of cellulosic fibers and fillers rejected during the pulping or paper making process. Most sludges are dewatered and discharged into landfills or land spread at a cost to the mill; creating large economic and environmental burdens. This lignocellulosic residual stream can be used as a
2021/4/1/ · 1. Introduction. Waste activated sludge (WAS) is an important by-product of biological treatment processes [1], WAS disposal generally accounts for 50 %–60 % of the total construction and operation costs of a wastewater treatment plant [2, 3].WAS contains elements such as N, P, K and rich organic matter, which can be used as a resource [4].In
2024/4/19/ · Paper sludge (PS) from paper mills has a significant potential for bioethanol production. In this study, waste-paper-containing PS is used as the raw material for bioethanol production because the annual waste paper utilization rate has increased globally. Although PS does not require delignification, the antiseptics and deinking agents in waste
2020/5/10/ · Up-flow anaerobic sludge blanket (UASB) reactor belongs to high-rate systems, able to perform anaerobic reaction at reduced hydraulic retention time, if compared to traditional digesters. In this review, the most recent advances in UASB reactor applications are critically summarized and discussed, with outline on the most critical aspects for further
2015/1/6/ · Paper mill sludge is a solid waste material composed of pulp residues and ash generated from pulping and paper making process. The carbohydrate portion of the sludges from Kraft/Recycle paper mill has chemical and physical characteristics similar to those of commercial wood pulp. Because of its high carbohydrate content and well-dispersed
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., …
2024/1/2/ · Black liquor (BL) bioconversion into valuable by-products is essential to develop a bioeconomy strategy; however, its furfural content hinders microbial fermentation activities. Hence, this study utilizes paper mill sludge (PMS) to provide extracellular enzymes, furfural-degrading microbial consortia, and electron donor required for promoting the BL …
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 …
2016/12/26/ · Waste disposal from paper and pulp industry is of great environmental concern. Sludge from recycled paper mills favors colonization with different microbial species due to its chemical composition. In this environment, the microbiota can express enzymes that hydrolyze celluloses and hemicelluloses, such as cellulases, β-glucosidases, …