A modified MBR system with post advanced purification for domestic water supply system in 180-day CELSS: Construction, pollutant removal and water allocation

Li, Ting; Zhang, Liangchang; Ai, Weidang; Dong, Wenyi; Yu, Qihui

doi:10.1016/j.jenvman.2018.05.023

Cited by 17 publications

(7 citation statements)

References 20 publications

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“…Technological results are extensively published and discussed elsewhere (Dai et al, 2018a,b; Li et al, 2018) and suggest the feasibility of technologies used in this CELSS for a long-term mission.…”

Section: Discussionmentioning

confidence: 89%

“…Air recovery and purification, as well as data on toxic trace gases, are detailed in Dai et al (2018a,b). Bio-based water recovery is described in Li et al (2018). In the water cycle, sanitary and other wastewater went to the nutrient solution storage tank for plants, and condensate water from plants was purified with a modified membrane bio-reactor process (Li et al, 2018) and used for drinking and washing.…”

Section: Resultsmentioning

confidence: 99%

“…Bio-based water recovery is described in Li et al (2018). In the water cycle, sanitary and other wastewater went to the nutrient solution storage tank for plants, and condensate water from plants was purified with a modified membrane bio-reactor process (Li et al, 2018) and used for drinking and washing. Plant care was performed daily; workload increased during harvest.…”

Section: Resultsmentioning

confidence: 99%

“…There was no night shift, all volunteers went to sleep and woke up at the same time. For individual hygiene, two subjects used anhydrous baths similar to space station conditions, and two others took showers (Li et al, 2018). Social psychological support included phone and video calls with family and friends every 15 days for 30 min.…”

Section: Methodsmentioning

confidence: 99%

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Multi-System Adaptation to Confinement During the 180-Day Controlled Ecological Life Support System (CELSS) Experiment

Yuan

Custaud

Zi³

et al. 2019

Front. Physiol.

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Confinement experiments are essential to prepare long-term space exploration. The 180-day Chinese CELSS (Controlled Ecological Life Support System) study is unique in its design, including a closed-loop system and mid-mission simulation of Mars-like day–night cycle of 24 h 40 min for 36 days (days 72–108). Our aim was to study physiological and psychological consequences of this confinement in four healthy volunteers (one female). CELSS platform consisted of six interconnected modules including four greenhouses. Life support systems were controlled automatically. Body composition, fluid compartments, metabolic state, heart, large vessels, endothelial function, and muscle tone were studied using biological, functional, and/or morphological measurements. Behavioral activities were studied by ethological monitoring; psychological state was assessed by questionnaires. Body weight decreased by ∼2 kg mostly due to lean mass loss. Plasma volume and volume-regulating hormones were mostly stable. Carotid intima-media thickness (IMT) increased by 10–15%. Endothelium-dependent vasodilation decreased. Masseter tone increased by 6–14% suggesting stress, whereas paravertebral muscle tone diminished by 10 ± 6%. Behavioral flow reflecting global activity decreased 1.5- to 2-fold after the first month. Psychological questionnaires revealed decrease in hostility and negative emotions but increase in emotional adaptation suggesting boredom and monotony. One subject was clearly different with lower fitness, higher levels of stress and anxiety, and somatic signs as back pain, peak in masseter tone, increased blood cortisol and C-reactive protein. Comparison of CELSS experiment with Mars500 confinement program suggests the need for countermeasures to prevent increased IMT and endothelial deconditioning. Daily activity in greenhouse could act as countermeasure against psycho-physiological deconditioning.

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Section: Discussionmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Multi-System Adaptation to Confinement During the 180-Day Controlled Ecological Life Support System (CELSS) Experiment

Yuan

Custaud

Zi³

et al. 2019

Front. Physiol.

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“…Membrane bioreactor systems utilize the combined use of the activated sludge and membrane separation that provides a surface for microbial‐waste interaction and filtration system with longer Solid Retention Time (SRT). Wastewater is pumped to the MBR system and mixed with the activated sludge vigorously (T. Li et al., 2018). The Mixed Liquor Suspended Solid (MLSS) is allowed to circulate inside the reactor for a period of STR.…”

Section: Membrane Biological Reactors and Their Application For Metal...mentioning

confidence: 99%

Relevance of membrane biological reactor in heavy metals recovery: Diminutive review

Mengesha

Sahu

2021

Environmental Quality Mgmt

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Heavy metals are extensively utilized in modern industries in various process. Subsequently a large quantity of waste generated as byproduct that have great impact on environment. A higher concentration of almost all heavy metals are toxic in nature for all living organisms. Therefore, the wastes discharged from the conventional treatment plants deteriorate the natural ecosystems; qualities of water sources and farmlands. Globally, activated sludge waste treatment technology have been widely used as a metal recovery process. The technique miscarried to attain the anticipated removal efficiency. Recently, membrane biological reactor (MBR) system has emerged as an important alternative to conventional activated sludge (CAS) systems. The work describes the potency of microbes for extraction heavy metal from wastes, the enhancements in biotechnology, characterization of specific wastes, optimization parameters to operate under various conditions that prevail in membrane bioreactors. The performance of the MBR technology shows good results to reduce all types heavy metals with supporting evidence, which obtained from the results of prominent studies.

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Open-Loop Vs. Closed-Loop Life Support Systems

Seedhouse

2020

Life Support Systems for Humans in Space

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A modified MBR system with post advanced purification for domestic water supply system in 180-day CELSS: Construction, pollutant removal and water allocation

Cited by 17 publications

References 20 publications

Multi-System Adaptation to Confinement During the 180-Day Controlled Ecological Life Support System (CELSS) Experiment

Multi-System Adaptation to Confinement During the 180-Day Controlled Ecological Life Support System (CELSS) Experiment

Relevance of membrane biological reactor in heavy metals recovery: Diminutive review

Open-Loop Vs. Closed-Loop Life Support Systems

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