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Open AccessArticle

Effects of Hydraulic Loading Rate on Nutrients Removal from Anaerobically Digested Swine Wastewater by Multi Soil Layering Treatment Bioreactor

College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
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Int. J. Environ. Res. Public Health 2018, 15(12), 2688; https://doi.org/10.3390/ijerph15122688
Received: 31 August 2018 / Revised: 25 September 2018 / Accepted: 12 October 2018 / Published: 29 November 2018
(This article belongs to the Special Issue Municipal Wastewater Treatment)
A multi soil layering (MSL) treatment bioreactor was developed aiming at nutrients removal from anaerobically digested swine wastewater (ADSW). The start-up of the MSL bioreactor and its performance in nutrients removal at different hydraulic loading rate (HLR) were investigated. Results showed that the MSL bioreactor was successfully started up after operation for 28 days, and at this time, the removal efficiencies of ammonia-N, total nitrogen (TN) and total phosphorus (TP) in the ADSW reached 63.6%, 58.5%, and 46.5%, respectively. The MSL bioreactor showed a stable performance during the whole working process with varying HLR from 80 to 200 L/(m2·day). Maximum removal efficiencies of ammonia-N, TN and TP were obtained at 160 L/(m2·day), and was appeared as 94.2%, 94.4%, and 92.5%, respectively. It was worth noting that iron scraps were the key factor that enhanced the independent capability of the MSL bioreactor in TP removal, because there was only 21.4–25.8% of the TP was removed when the MSL bioreactor run with no iron addition. View Full-Text
Keywords: multi soil layering treatment (MSL); anaerobically digested swine wastewater (ADSW); ammonia-N removal; total nitrogen (TN) removal; total phosphorus (TP) removal multi soil layering treatment (MSL); anaerobically digested swine wastewater (ADSW); ammonia-N removal; total nitrogen (TN) removal; total phosphorus (TP) removal
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Guo, J.; Zhou, Y.; Yang, Y.; Chen, C.; Xu, J. Effects of Hydraulic Loading Rate on Nutrients Removal from Anaerobically Digested Swine Wastewater by Multi Soil Layering Treatment Bioreactor. Int. J. Environ. Res. Public Health 2018, 15, 2688.

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