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Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry : mitigating suspended solids and retaining nutrients

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Abstract
Use of membrane filtration is attracting increasing attention for nutrient recovery from anaerobically digested slurry. However, the challenge is to reduce membrane fouling by effective solids mitigation, while maintaining valuable nutrients. In this study, the effects of several flocculation pre-treatments using polyaluminium chloride, iron chloride, and flocculant aid at various dosages were investigated. The results showed significant improvement in membrane flux from 0.8 to 27.6 mL/m(2)/s due to solid migration (up to 75% removal). Significant loss of PO43--P (99%) and humic acids (40-80%) was observed. However, the content of NH4+-N and indoleacetic acids was largely maintained in the treated slurry. Moreover, toxic metals were significantly removed through flocculation, making the final product risk-free of heavy metals for agricultural application.
Keywords
Anaerobic digestion, Membrane filtration, Flocculation pre-treatment, Heavy metals, Organic fertilizer, ANAEROBIC-DIGESTION, CHARGE NEUTRALIZATION, PRE-COAGULATION, WATER-TREATMENT, WASTE-WATER, PHOSPHORUS, PRODUCTS, REMOVAL, ACID, PRECIPITATION

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Chicago
Luo, Hongzhen, Tao Lyu, Atif Muhmood, Yong Xue, Haotian Wu, Erik Meers, Renjie Dong, and Shubiao Wu. 2018. “Effect of Flocculation Pre-treatment on Membrane Nutrient Recovery of Digested Chicken Slurry : Mitigating Suspended Solids and Retaining Nutrients.” Chemical Engineering Journal 352: 855–862.
APA
Luo, H., Lyu, T., Muhmood, A., Xue, Y., Wu, H., Meers, E., Dong, R., et al. (2018). Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry : mitigating suspended solids and retaining nutrients. CHEMICAL ENGINEERING JOURNAL, 352, 855–862.
Vancouver
1.
Luo H, Lyu T, Muhmood A, Xue Y, Wu H, Meers E, et al. Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry : mitigating suspended solids and retaining nutrients. CHEMICAL ENGINEERING JOURNAL. 2018;352:855–62.
MLA
Luo, Hongzhen et al. “Effect of Flocculation Pre-treatment on Membrane Nutrient Recovery of Digested Chicken Slurry : Mitigating Suspended Solids and Retaining Nutrients.” CHEMICAL ENGINEERING JOURNAL 352 (2018): 855–862. Print.
@article{8600159,
  abstract     = {Use of membrane filtration is attracting increasing attention for nutrient recovery from anaerobically digested slurry. However, the challenge is to reduce membrane fouling by effective solids mitigation, while maintaining valuable nutrients. In this study, the effects of several flocculation pre-treatments using polyaluminium chloride, iron chloride, and flocculant aid at various dosages were investigated. The results showed significant improvement in membrane flux from 0.8 to 27.6 mL/m(2)/s due to solid migration (up to 75% removal). Significant loss of PO43--P (99%) and humic acids (40-80%) was observed. However, the content of NH4+-N and indoleacetic acids was largely maintained in the treated slurry. Moreover, toxic metals were significantly removed through flocculation, making the final product risk-free of heavy metals for agricultural application.},
  author       = {Luo, Hongzhen and Lyu, Tao and Muhmood, Atif and Xue, Yong and Wu, Haotian and Meers, Erik and Dong, Renjie and Wu, Shubiao},
  issn         = {1385-8947},
  journal      = {CHEMICAL ENGINEERING JOURNAL},
  keywords     = {Anaerobic digestion,Membrane filtration,Flocculation pre-treatment,Heavy metals,Organic fertilizer,ANAEROBIC-DIGESTION,CHARGE NEUTRALIZATION,PRE-COAGULATION,WATER-TREATMENT,WASTE-WATER,PHOSPHORUS,PRODUCTS,REMOVAL,ACID,PRECIPITATION},
  language     = {eng},
  pages        = {855--862},
  title        = {Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry : mitigating suspended solids and retaining nutrients},
  url          = {http://dx.doi.org/10.1016/j.cej.2018.07.097},
  volume       = {352},
  year         = {2018},
}

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