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2023 Vol.35, Issue 3 Preview Page

Research Article

Evaluation of Physicochemical Separation Characteristics of Pig Manure According to the Type of Solid-liquid Separation Process
Soo-Ryang Kim1
,
Seung-Hyun Park2
,
Su-Chan Lee2
,
Joshua Nizel Halder3
,
Ji-Won Jung2
,
Sang-Hyean Ahn2
,
Kwon-Woong Ham2
,
Myung-Gyu Lee4*
1Research Professor, Industry-Academic Cooperation Foundation, Sangji University, Korea
2Master’s Student, Department of Environmental Engineering, Sangji University, Korea
3Post Doc, National Institute of Animal Science (NIAS), 1500 Kongjwipatjwi-ro, Wanju-gun, Jeollabuk-do 55365, Korea
4Professor, Department of Smart life science, Sang-ji University, Korea
*Corresponding Author
30 September 2023. pp. 247-258
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Abstract

This study evaluated different solid-liquid separation (SLS) methods that are used to treat wastewater and manure originating from pig farms. SLS is crucial for recycling and purification of pig manure. We tested 7 SLS processes at 13 farms: centrifuge, centrifuge with a coagulation agent, belt press with a coagulation agent, drum screen, inclined screen, vibration screen, and screw press. We collected manure samples both before and after the SLS separation process, including the separated liquid and solid manure, and analyzed them for pH, electrical conductivity, moisture, chemical oxygen demand (CODMn), five-day biological oxygen demand (BOD5), total nitrogen (TN), total phosphate (TP), K, total solids (TS), suspended solids (SS), sodium chloride, and heavy metals. Belt presses with coagulation agents showed the highest TS and SS reductions (78.8% and 96.9%). Belt press and centrifugation with coagulation agents achieved 41.0% and 94.2% TN and TP removal, respectively. A belt press with a coagulation agent reduced 59.4% and 66.0% BOD5 and CODMn, respectively. A centrifuge with a coagulation agent removed 100% Zn and 98.6% Cu. Drum screens, inclined screens, vibration screens, screw presses, and centrifuges without coagulation had lower removal efficiencies for nutrients, solids, Zn, and Cu compared with that of centrifugal and belt presses with coagulation. Centrifugal and belt presses with coagulation exhibited higher efficiencies for removing nutrients, solids, and metals. Further studies are clarify the effects of SLS on the biological and chemical processes.

Keywords
Livestock
Pig manure
Solid-liquid separations
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Information
  • Publisher :Agriculture and Life Sciences Research Institute, Kangwon National University
  • Publisher(Ko) :강원대학교 농업생명과학대학 농업생명과학연구원
  • Journal Title :Journal of Agricultural, Life and Environmental Sciences
  • Journal Title(Ko) :농업생명환경연구
  • Volume : 35
  • No :3
  • Pages :247-258
  • Received Date : 2023-07-24
  • Revised Date : 2023-08-18
  • Accepted Date : 2023-08-30
  • DOI :https://doi.org/10.22698/jales.20230020
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