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Int. J. Environ. Res. Public Health 2018, 15(9), 1894; https://doi.org/10.3390/ijerph15091894

The Combined Process of Paper Filtration and Ultrafiltration for the Pretreatment of the Biogas Slurry from Swine Manure

Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing 100089, China
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Received: 3 August 2018 / Revised: 23 August 2018 / Accepted: 29 August 2018 / Published: 31 August 2018
(This article belongs to the Section Environmental Science and Engineering)
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Abstract

The membrane process had been applied for the advanced treatment of pig farm biogas slurry. As studied, this physical pretreatment, with low cost and high efficiency of the suspended solids removal and nutrient retention, is required to control membrane fouling. The combined process of paper filtration and ultrafiltration in a pilot scale was applied in the present study. The main objective was to explore and identify the feasibility of the new process for the pretreatment of the separation liquid of pig farm biogas slurry. A precision identification experiment of paper filtration and the multi-batch repetitive experiments of the combined process were designed. The results showed, at the identified paper filtration precision of 50μm and an operating pressure of 0.3 bar of the ultrafiltration process, that the flux rate at the stable stage of the multi-batch operation was around 295.00 L/h. The combined process achieved an overall processing rate of 345.41 ± 18.81 L/h and a volume permeation proportion of 82.45% ± 0.85%. The TSS was removed by 95.71%, but total nitrogen (TN) and ammonia nitrogen (NH3-N) were retained by 76.29% ± 2.04% and 73.74% ± 2.10%, respectively. Comprehensively, the requirement for the pretreatment was obtained. View Full-Text
Keywords: biogas slurry; the combined process; paper filtration; ultrafiltration biogas slurry; the combined process; paper filtration; ultrafiltration
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Zhan, Y.; Dong, H.; Yin, F.; Yue, C. The Combined Process of Paper Filtration and Ultrafiltration for the Pretreatment of the Biogas Slurry from Swine Manure. Int. J. Environ. Res. Public Health 2018, 15, 1894.

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