Projects per year
Abstract
In this study a novel accelerated restart strategy has been developed for a two stage anaerobic digestion system, involving acid phase digestion of sewage biosolids, followed by mesophilic digestion. The strategy involves start-up of the acid phase process, and then restart of the secondary mesophilic digesters, following a feed starvation period, and without re-inoculation. Process simulation with BioWin 4.1 software was coupled with continuous lab-scale trials to inform a full sized trial, which in turn defined the full plant restart schedule. Biosolids feed shut down period, and feed loading and feed acceleration rates were explored via lab-scale trials and simulation. The lab and simulation trials lead to the proposal of a 21 day restart profile for start-up and recovery of the two-stage anaerobic digestion process. This profile involved an initial feed load of 39% of the normal steady-state flow, and a 5% daily feed flow ramp up rate, following a 3 week starvation period. This accelerated restart strategy was successfully deployed on a 24,500 m3 anaerobic digester system in the UK. During restart the concentration of VFAs remained less than 1,500 mg L-1, whilst pH and alkalinity were stable around 7.8 and 5,000 mg L-1, resulting in a stable recovery.
Original language | English |
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Publication status | Published - 20 Nov 2017 |
Event | EUROPEAN BIOSOLIDS AND ORGANIC RESOURCES CONFERENCE - Royal Armouries, Leeds, UK United Kingdom Duration: 20 Nov 2017 → 21 Nov 2017 http://european-biosolids.com/ |
Conference
Conference | EUROPEAN BIOSOLIDS AND ORGANIC RESOURCES CONFERENCE |
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Country/Territory | UK United Kingdom |
City | Leeds |
Period | 20/11/17 → 21/11/17 |
Internet address |
Keywords
- anaerobic digestion
- Simulation and Modeling
- BioWin
- Sludge digestion
- waste water treatment
- acid phase digestion
ASJC Scopus subject areas
- Bioengineering
- Environmental Engineering
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Dive into the research topics of 'BioWin modelling to reduce the Avonmouth digester commissioning programme from 6 months to 6 weeks'. Together they form a unique fingerprint.Projects
- 1 Finished
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IAA - Wessex Water Research Project
Arnot, T., Arnould, E., Kasprzyk-Hordern, B., Leak, D., McManus, M., Newnes, L., Scott, R. & Tams, S.
Engineering and Physical Sciences Research Council
1/07/13 → 31/08/15
Project: Research council