Effects of bioreactor retention time on aerobic microbial decomposition of CELSS crop residues

Strayer, Richard F.; Finger, Barry W.; Alazraki, Michael P.

doi:10.1016/s0273-1177(97)00936-8

Cited by 10 publications

(7 citation statements)

References 9 publications

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“…These preprocessing steps were identified during review of previous bioreactor studies (3,4,12,13) as having the best potential for increasing the recovery of inorganic crop nutrients. Increases in nutrient recovery will be weighed against the costs of the preprocessing steps.…”

Section: Crop Residue Preleaching Treatmentsmentioning

confidence: 99%

“…This loading rate was selected because it had been used in previous studies of crop residue bioprocessing in continuous stirred tank reactors (3,4,(12)(13)(14). However, fresh chopped wheat residues could not be magnetically stirred at this loading rate.…”

Section: Crop Residue Leaching Techniquementioning

confidence: 99%

“…The soluble organic compounds were readily leached from crop residues and accounted for nearly 25% of crop residue carbon (6). Over a wide range of bioreactor retention times (1 to 48 days), microbial decomposition consistently reduced the level of soluble organic compounds by 75% (6,12). The remaining refractile soluble organic compounds (25%) had little inhibitory effect on crop growth and contributed little to the proliferation of biofilm fouling.…”

Section: Introductionmentioning

confidence: 99%

“…Studies at KSC have shown a CSTR can be used to recycle inorganic nutrients from crop residues back to a hydroponic crop production system (3,4,(12)(13)(14). These mineral nutrients were leached from the crop residue in the bioreactor and recovered in the harvested broth.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Drying and Size Reduction Pretreatments on Recovery of Inorganic Crop Nutrients From Inedible Wheat Residues

Strayer

Alazraki²,

Judkins³

2003

habitation (elmsford)

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Inorganic nutrients can be easily recovered from ALS crop residue solid wastes by aqueous leaching. However, oven-drying and milling pretreatment of these residues has been frequently required to accommodate crop scientists and facility storage limitations. As part of a research study that will compare three different bioreactor technologies for processing these wastes, we realized that different drying and size reduction pretreatments had been utilized for each technology. This article compares the effects of residue pretreatment on recovery of nutrients by leaching. Pretreatments included three drying methods [fresh, oven-dried (70°C overnight), and freeze-dried)] and two size reduction methods [chopped (2 cm length) and milled (2 mm diameter)]. Determination of mass balances (dry weight and ash content of solids) before and after leaching indicated solublization was least for fresh residues (23% dry weight loss and 50% for ash loss) and most for freeze-dried residues (41-47% dry weight loss and nearly 100% for ash loss). Mineral recovery of major elements (NO 3 , PO 4 , K, Ca, and Mg) in leachates was poorest for fresh residues. P and K recovery in leachates was best for oven-dried residues, and Ca, Mg, and N recovery best for freeze-dried residues. The differences in recovery for N, P, and K in leachates were minimal between chopping and milling and slightly better for Ca and Mg from milled residues. conversion of crop residue (15). However, oven-drying and milling pretreatment of these residues (inedible roots, stems, leaves, and chaff) had been frequently required to accommodate crop scientists and facility storage limitations. As a first step, wheat residues were extracted with water at room temperature to remove soluble compounds that might later interfere with cellulose hydrolysis. Upon analysis, this aqueous extract (leachate) was found to contain significant quantities of many plant nutrients (nitrate, K, Ca, Mg, phosphate, etc.). This leachate could be used to replenish wheat hydroponic solutions, but soluble organic compounds were also extracted (7,8). These compounds led to problems in the nutrient delivery system if not first removed from the leachate

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Section: Crop Residue Preleaching Treatmentsmentioning

confidence: 99%

Section: Crop Residue Leaching Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Drying and Size Reduction Pretreatments on Recovery of Inorganic Crop Nutrients From Inedible Wheat Residues

Strayer

Alazraki²,

Judkins³

2003

habitation (elmsford)

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“…BIOS, a Russian approach, with closed experiments conducted with two and three men crews in closure for up to five months Bartsev et al, 2000). NASAÕs ALS (Advanced Life Support) projects performed by NASA in preparation of long-term exploratory missions (Hanford and Ewert, 2002;Strayer et al, 1997a).…”

Section: Introductionmentioning

confidence: 99%

The conceptual design of a hybrid life support system based on the evaluation and comparison of terrestrial testbeds

Czupalla

Horneck

Blome

2005

Advances in Space Research

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Large-Scale Crop Production for the Moon and Mars: Current Gaps and Future Perspectives

Poulet

Engeling

Hatch

et al. 2022

Front. Astron. Space Sci.

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In this perspectives paper, we identify major challenges for space crop production: altered convection in the microgravity environment, scheduling and logistics, crew time and the need for advanced automation, robotics, modeling, and machine learning. We provide an overview of the existing space crop production gaps identified by the Kennedy Space Center (KSC) space crop production team and discuss efforts in current development in NASA projects to address these gaps. We note that this list may not be exhaustive but aims to present the baseline needs for space crop production implementation and a subset of current solutions to the greater scientific community in order to foster further ingenuity.

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Effects of bioreactor retention time on aerobic microbial decomposition of CELSS crop residues

Cited by 10 publications

References 9 publications

The Effect of Drying and Size Reduction Pretreatments on Recovery of Inorganic Crop Nutrients From Inedible Wheat Residues

The Effect of Drying and Size Reduction Pretreatments on Recovery of Inorganic Crop Nutrients From Inedible Wheat Residues

The conceptual design of a hybrid life support system based on the evaluation and comparison of terrestrial testbeds

Large-Scale Crop Production for the Moon and Mars: Current Gaps and Future Perspectives

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