Towards globally relevant, small-footprint dewatering solutions: Optimal conditioner dose for highly variable blackwater from non-sewered sanitation

Shaw, Kelsey; Vogel, Michael; Andriessen, Nienke; Hardeman, Thomas; Dorea, Caetano C.; Strande, Linda

doi:10.1016/j.jenvman.2022.115961

Cited by 6 publications

(2 citation statements)

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“…For example, processes could be specifically selected to take advantage of the readily available organic matter in blackwater that has been stored for less than a week, such as anaerobic digestion, or conditioners could be used to improve dewatering of more stabilized blackwater, allowing for much smaller treatment footprints for dense, urban areas. 65 Recent evidence on climate mitigation also suggests that blackwater should be moved as quickly as possible to treatment, where emissions can be controlled and captured. 39,66 There is no specific hierarchy that ranks any of categories I− IV above another; however, different categories will be more relevant in specific contexts, and all present scope for further research, development, and innovation.…”

Section: ■ Implications For Managementmentioning

confidence: 99%

“…This will allow engineers to develop appropriate processes with improved treatment efficiencies. For example, processes could be specifically selected to take advantage of the readily available organic matter in blackwater that has been stored for less than a week, such as anaerobic digestion, or conditioners could be used to improve dewatering of more stabilized blackwater, allowing for much smaller treatment footprints for dense, urban areas . Recent evidence on climate mitigation also suggests that blackwater should be moved as quickly as possible to treatment, where emissions can be controlled and captured. , …”

Section: Implications For Managementmentioning

confidence: 99%

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Urban Sanitation: New Terminology for Globally Relevant Solutions?

Strande,

Evans,

von Sperling

et al. 2023

Environ. Sci. Technol.

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Progress toward Sustainable Development Goals for global access to safe sanitation is lagging significantly. In this Feature, we propose that misleading terminology leads to errors of categorization and hinders progress toward sanitation service provision in urban areas. Binary classifications such as “offsite/onsite” and “sewered/nonsewered” do not capture the need for “transport to treatment” or the complexity of urban sanitation and should be discarded. “Fecal sludge management” is used only in the development context of low- or middle-income countries, implying separate solutions for “poor” or “southern” contexts, which is unhelpful. Terminology alone does not solve problems, but rather than using outdated or “special” terminology, we argue that a robust terminology that is globally relevant across low-, middle-, and upper-income contexts is required to overcome increasingly unhelpful assumptions and stereotypes. The use of accurate, technically robust vocabulary and definitions can improve decisions about management and selection of treatment, promote a circular economy, provide a basis for evidence-based science and technology research, and lead to critical shifts and transformations to set policy goals around truly safely managed sanitation. In this Feature, the three current modes of sanitation are defined, examples of misconceptions based on existing terminology are presented, and a new terminology for collection and conveyance is proposed: (I) fully road transported, (II) source-separated mixed transport, (III) mixed transport, and (IV) fully pipe transported.

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Section: ■ Implications For Managementmentioning

confidence: 99%