- Title
- Rural drinking water treatment system combining solar-powered electrocoagulation and a gravity-driven ceramic membrane bioreactor
- Creator
- Du, Xing; Zhao, Wentao; Wang, Zhen; Ma, Rong; Luo, Yunlong; Wang, Zhihong; Sun, Qiong; Liang, Heng
- Relation
- Separation and Purification Technology Vol. 276, no. 119383
- Publisher Link
- http://dx.doi.org/10.1016/j.seppur.2021.119383
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2021
- Description
- Rural water treatment is generally more challenging than urban water treatment. This study proposed a novel rural water treatment system effectively harnessing solar energy and gravitational hydropower. Influent was initially fed to a solar-driven electrocoagulation unit, in which UV254 level was reduced (by almost 60%) and large flocs (averaging up to 66.2 μm in diameter) were formed. The effluent was then introduced to a gravity-driven ceramic membrane bioreactor (GDCMBR) at different water head differences (ΔH = 0.5 or 1.0 m). Generally, applying the greater water head difference (ΔH = 1.0 m) did not enhance removal of turbidity and organic matter, but it led to a reasonably high flux (25.9 L/m2/h). The GDCMBR enriched various useful microorganisms such as nitrifiers (Nitrospira bacteria), and denitrifiers (Diaphorobacter bacteria), enabling almost complete elimination of NH3-N and NO2–-N. Overall, the findings of this study suggest the possibility of sustainable operation during rural water treatment.
- Subject
- floc; computational fluid dynamics; gravity-driven membrane filtration; membrane fouling; biofilm; SDG 6; SDG 11; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1471303
- Identifier
- uon:48641
- Identifier
- ISSN:1383-5866
- Language
- eng
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