Next Article in Journal
Mass Production of Plasma Activated Water: Case Studies of Its Biocidal Effect on Algae and Cyanobacteria
Next Article in Special Issue
Thermophilic Anaerobic Co-Digestion of Exhausted Sugar Beet Pulp with Cow Manure to Boost the Performance of the Process: The Effect of Manure Proportion
Previous Article in Journal
Hydrochemistry Differences and Causes of Tectonic Lakes and Glacial Lakes in Tibetan Plateau
Previous Article in Special Issue
Performance Analysis for the Anaerobic Membrane Bioreactor Combined with the Forward Osmosis Membrane Bioreactor: Process Conditions Optimization, Wastewater Treatment and Sludge Characteristics
Article

Impacts of Temperature and Solids Retention Time, and Possible Mechanisms of Biological Hydrolysis Pretreatment on Anaerobic Digestion

1
Suez Water Technologies & Solutions, Oakville, ON L6M 4B2, Canada
2
School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada
*
Author to whom correspondence should be addressed.
Water 2020, 12(11), 3166; https://doi.org/10.3390/w12113166
Received: 16 October 2020 / Revised: 9 November 2020 / Accepted: 11 November 2020 / Published: 12 November 2020
(This article belongs to the Special Issue Enhancement of Anaerobic Digestion for Energy and Resource Recovery)
Anaerobic digestion (AD) has benefits in sludge management, energy recovery, and pathogen reduction. In order to better understand the mechanisms of biological hydrolysis (BH) pretreatment on AD, biochemical methane potential (BMP) and continuous stirred-tank reactor (CSTR) tests were utilized to compare untreated municipal combined sludge with pilot-scale BH pretreated sludge. During the BH process, there was 15%, 30%, and 33% (w/w) volatile solids (VS) reduction after BH at 42 °C (BH42) for 24, 48, and 72 h, respectively; under BH61 (42 °C for 36 h and 61 °C for 6 h), and there was 10% and 30% (w/w) overall VS reduction after 36-h and 42-h hydrolysis, respectively. BMP results showed that BH42-pretreated sludge had 22.6% enhancement of methane yield compared to untreated sludge, and BH61 pretreated sludge had 29.4% enhancement of methane yield. Both temperature and solids’ retention time (SRT) contributed to the enhanced AD performance within 36 h, while temperature played more important roles after 36-h BH pretreatment. CSTR tests confirmed the acceleration of anaerobic digestion by BH pretreatment, and higher enhancement was observed when SRT of anaerobic digestion was shorter than 16 days. Through a literature review of BH-related studies, the possible mechanisms were highlighted for further optimization on the scale-up systems in order to reduce carbon footprint and operating expenditure for wastewater treatment plants. View Full-Text
Keywords: anaerobic digestion; biochemical methane potential (BMP); biological hydrolysis; continuous stirred-tank reactor (CSTR); resource recovery; volatile solids reduction anaerobic digestion; biochemical methane potential (BMP); biological hydrolysis; continuous stirred-tank reactor (CSTR); resource recovery; volatile solids reduction
Show Figures

Figure 1

MDPI and ACS Style

Ding, H.H.; Kotova, P.; Shaw, C.; Hong, Y.; Chang, S. Impacts of Temperature and Solids Retention Time, and Possible Mechanisms of Biological Hydrolysis Pretreatment on Anaerobic Digestion. Water 2020, 12, 3166. https://doi.org/10.3390/w12113166

AMA Style

Ding HH, Kotova P, Shaw C, Hong Y, Chang S. Impacts of Temperature and Solids Retention Time, and Possible Mechanisms of Biological Hydrolysis Pretreatment on Anaerobic Digestion. Water. 2020; 12(11):3166. https://doi.org/10.3390/w12113166

Chicago/Turabian Style

Ding, Huihuang H.; Kotova, Polina; Shaw, Christopher; Hong, Youngseck; Chang, Sheng. 2020. "Impacts of Temperature and Solids Retention Time, and Possible Mechanisms of Biological Hydrolysis Pretreatment on Anaerobic Digestion" Water 12, no. 11: 3166. https://doi.org/10.3390/w12113166

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop