An innovative intermittent-vacuum assisted thermophilic anaerobic digestion process for effective animal manure utilization and treatment.

Citation data:

Bioresource technology, ISSN: 1873-2976, Vol: 244, Issue: Pt 1, Page: 1073-1080

Publication Year:
2017
Usage 9
Abstract Views 9
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PMID:
28851163
DOI:
10.1016/j.biortech.2017.08.080
Author(s):
Zhang, Renchuan, Anderson, Erik, Addy, Min, Deng, Xiangyuan, Kabir, Fayal, Lu, Qian, Ma, Yiwei, Cheng, Yanling, Liu, Yuhuan, Chen, Paul, Ruan, Roger Show More Hide
Publisher(s):
Elsevier BV
Tags:
Chemical Engineering, Environmental Science, Energy
article description
Intermittent-vacuum stripping (IVS) was developed as a pretreatment for thermophilic anaerobic digestion (TAD) to improve methanogenesis and hydrolysis activity through preventing free ammonia and hydrogen sulfide (HS) inhibition from liquid swine manure (LSM). Over 98% of ammonia and 38% organic nitrogen were removed in 60min from 55°C to 85°C with vacuum pressure (from 100.63±3.79mmHg to 360.91±7.39mmHg) at initial pH 10.0 by IVS. Thermophilic methanogenesis and hydrolysis activity of pretreated LSM increased 52.25% (from 11.56±1.75% to 17.60±0.49%) in 25days and 40% (from 10days to 6days) in bio-methane potential assay. Over 80% HS and total nitrogen were removed by IVS assistance, while around 70% nitrogen was recycled as ammonium sulfate. Therefore, IVS-TAD combination could be an effective strategy to improve TAD efficiency, whose elution is more easily utilized in algae cultivation and/or hydroponic system.

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