caa a22 4500 605502544 CHVBK 20210128100606.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00253-015-6895-4 doi (NATIONALLICENCE)springer-10.1007/s00253-015-6895-4 Study of bioleaching under different hydraulic retention time for enhancing the dewaterability of digestate [Elektronische Daten] [Linshuai Li, Jingqing Gao, Songfeng Zhu, Yonghong Li, Ruiqin Zhang] Dewatering of kitchen waste digestate is a key problem to solve so as to increase the application of kitchen waste after anaerobic digestion. In this study, the effects of bioleaching under different hydraulic retention time (HRT=2, 2.5, and 3days) on dewaterability of kitchen waste digestate were evaluated. A 12-stage plug flow bioreactor with 180L working volume was used for digestate bioleaching. The bioleached digestate under different HRTs were collected and dewatered by plate-and-frame filter press. The results showed that the moisture contents of digestate cakes were 67.87% at 2days of HRT, 58.06% at 2.5days of HRT, and 54.45% at 3days of HRT, respectively, indicating the longer the HRT, the lower the moisture content of filter cake. Balanced between the cost and practical need, 2.5days can be used as the HRT in engineering application. Under the condition of HRT of 2.5days, the pH, specific resistance to filtration (SRF), capillary suction time (CST), and sedimentation rate of digestate changed from the initial values of 8.08, 210.6s, 23.4×1012mkg−1 and 10% to 3.21, 32.7s, 2.44×1012mkg−1 and 76.8%, respectively. Based on the observations above, the authors conclude that bioleaching technology is an effective method to enhance digestate dewaterability and reduce the cost of subsequent reutilization. Springer-Verlag Berlin Heidelberg, 2015 Kitchen waste digestate nationallicence Bioleaching nationallicence Plug-flow bioreactor nationallicence Hydraulic retention time nationallicence Dewatering nationallicence Li Linshuai Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut Gao Jingqing Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut Zhu Songfeng Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut Li Yonghong School of Pharmaceutical Sciences, Zhengzhou University, 450001, Zhengzhou, China aut Zhang Ruiqin Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/24(2015-12-01), 10735-10743 0175-7598 99:24<10735 2015 99 253 https://doi.org/10.1007/s00253-015-6895-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00253-015-6895-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Linshuai Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut NATIONALLICENCE 700 1- Gao Jingqing Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut NATIONALLICENCE 700 1- Zhu Songfeng Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut NATIONALLICENCE 700 1- Li Yonghong School of Pharmaceutical Sciences, Zhengzhou University, 450001, Zhengzhou, China aut NATIONALLICENCE 700 1- Zhang Ruiqin Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/24(2015-12-01), 10735-10743 0175-7598 99:24<10735 2015 99 253