https://doi.org/10.25678/0007MP

Changes in organic fractions, cations, and stabilization from feces to fecal sludge: implications for dewatering performance and management solutions

Reliable dewatering performance remains a key challenge in fecal sludge management, and the controlling factors or mechanisms are not well understood. There remain limited studies on constituents in feces and fecal sludge and how they affect the dewaterability of fecal sludge. This study aimed at evaluating a range of constituents in feces, and to gain empirical knowledge toward a mechanistic understanding of how they influence dewaterability. In this study, cellulose reduced capillary suction time, decreased supernatant turbidity, and increased cake solids. While hemicellulose decreased supernatant turbidity, lignin increased supernatant turbidity, capillary suction time, and cake solids. Extracellular polymeric substances (EPS) increased both capillary suction time and supernatant turbidity and decreased cake solids, whereas lipids increased turbidity. Cations had no significant effect on dewatering properties. Overall, fecal sludge stored in containments had better dewatering performance than ‘fresh’ fecal sludge, which was attributed to stabilization. Field fecal sludge had a higher relative abundance of Pseudomonas, which is associated with better aggregation, and fewer small particles (<10 μm) that clog filters to reduce dewatering performance. Further understanding of stabilization and developing an agreed-upon metrics of stabilization are essential for predicting fecal sludge dewatering performance, and developing smaller footprint dewatering treatment technologies.

Data and Resources

Citation

This Data Package

Sam, S., Morgenroth, E., & Strande, L. (2022). Changes in organic fractions, cations, and stabilization from feces to fecal sludge: implications for dewatering performance and management solutions (Version 1.0). Eawag: Swiss Federal Institute of Aquatic Science and Technology. https://doi.org/10.25678/0007MP
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The associated article

Sam, S. B., Morgenroth, E., & Strande, L. (2023). Changes in organic fractions, cations, and stabilization from feces to fecal sludge: implications for dewatering performance and management solutions. Journal of Water, Sanitation and Hygiene for Development, 13(9), 699–710. https://doi.org/10.2166/washdev.2023.086
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Metadata

  Publication Data Package for:
Open Data Open Data
Long-term data Long-term data
Author
  • Sam, Stanley
  • Morgenroth, Eberhard
  • Strande, Linda
Keywords microbial community,organic fibers,water holding capacity,settling performance,stabilization
Variables
  • capillary_suction_time
  • none
  • total_cell_concentration
  • total_nitrogen
  • total_phosphorus
  • total_solids
  • total_solids_after_dewatering
  • turbidity
  • volatile_solids
Substances (scientific names)
  • Stool
Substances (generic terms)
  • feces
Taxa (scientific names)
  • Blautia
  • Clostridium
  • Firmicutes
  • Proteobacteria
  • Pseudomonas
  • Subdoligranulum
Organisms (generic terms)
  • Bacteria
Systems
  • Jar test
  • Laboratory
  • Onsite containment
Timerange
  • 2018 TO 2022
Geographic Name(s)
  • Ghana, Senegal, India, Guatemala, Uganda, Kenya, Lebanon, Canada
Review Level none
Curator Sam, Stanley
Contact Strande, Linda <linda.strande@eawag.ch>
DOI 10.25678/0007MP