Journal
BIORESOURCE TECHNOLOGY
Volume 272, Issue -, Pages 421-432Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.10.057
Keywords
Piggery biogas slurry; Nutrient recovery; Photobioreactors; Operation parameters
Funding
- National Water Pollution Control and Treatment Project in China [2014ZX07101-012]
- National Natural Science Foundation of China [21765018]
- Scienceand Technology Support Project of Jiangxi Province [20161BBF60042]
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Photobioreactor is deemed to be one of limiting factors for the commercial application of wastewater treatment based on microalgae cultivation. In this study, a novel Flat-Plate Continuous Open Photobioreactor (FPCO-PBR) was developed to treat piggery biogas slurry. The operation parameters, microbial stability and nutrient recovery potential of FPCO-PBR were investigated. Results showed that the appropriate influent mode for FPCO-PBR was multi-point or spraying mode. The optimal hydraulic retention time and interval time for biomass harvesting of FPCO-PBR were both 2 d. Nitrogen and phosphorus recovery rate were 30 mg L-1 d(-1) and 7 mg L-1 d(-1) respectively under optimal operating parameters. Microbial diversity remained relatively stable in FPCO-PBR. Biomass production rate of FPCO-PBR was 0.47 g L-1 d(-1) under optimal operating parameters. The revenue generated from biomass was estimated to be 15.06 $ kg(-1), which means that treating one ton of wastewater can generate $ 7.08 in revenue.
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