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Direct utilization of human liquid wastes by plants in a closed ecosystem / G. M. Lisovsky [et al.] // Advances in Space Research. - 1997. - Vol. 20, Is. 10. - P1801-1804 . - ISSN 0273-1177
Кл.слова (ненормированные):
fertilizer -- nitrogen -- sodium chloride -- urea -- article -- biomass -- culture medium -- feasibility study -- human -- metabolism -- methodology -- microclimate -- sewage -- urine -- waste management -- wheat -- Biomass -- Culture Media -- Ecological Systems, Closed -- Feasibility Studies -- Fertilizers -- Humans -- Nitrogen -- Sodium Chloride -- Triticum -- Urea -- Urine -- Waste Disposal, Fluid -- Waste Management
Аннотация: Model experiments in phytotrons have shown that urea is able to cover 70% of the demand in nitrogen of the conveyer cultivated wheat. At the same time wheat plants can directly utilize human liquid wastes. In this article by human liquid wastes the authors mean human urine only. In a long-term experiment on "man-higher plants" system with two crewmen, plants covered 63 m2, with wheat planted to - 39.6 m2. For 103 days, complete human urine (total amount - 210.7 1) wassupplied into the nutrient solution for wheat. In a month and a half NaCl supply into the nutrient solution stabilized at 0.9-1.65 g/l. This salination had no marked effect on wheat production. The experiment revealed the realistic feasibility to directly involve liquid wastes into the biological turnover of the life support system. The closure of the system, in terms of water, increased by 15.7% and the supply of nutrients for wheat plants into the system was decreased. Closedness of biological turnover of matter in a man-made "man - higher plants" ecological system might involve, among other processes, direct utilization of human liquid wastes by plants. The amount of urine comprises 15-20% of the total amount of water cycling within the system including water as part of food, household, hygiene and potable water necessary for man. What is more, it they contains most nitrogen-bearing compounds emitted by man, almost all of the NaCl and some other substances involved in the biological turnover. Human liquid wastes can be utilized either by preliminary physical-chemical treatment (evaporating or freezing out the water, finally oxidizing the organic matter, isolating the mineral components required for plants, etc.) and further involvement of the obtained products or by direct application into the nutrient solution for plants. The challenge of direct utilization is that plants have no need of Na+ and Cl-, and also the organic forms of nitrogen emitted by man cannot fully meet the demand of plants forthis element. Besides, hygienic and/or psychological reasons make it desirable to avoid direct use of liquid wastes in the nutrient solutions that would have direct contact with edible part of plants (tubers, roots, bulbs). Feasibility of direct utilization of liquid wastes by plants in a closed "man - higher plants" ecosystem has been experimentally studied on wheat - grain culture as a model plant with the edible part in the form of seeds spatially dissociated with the nutrient medium. The wheat covered 60-65% of the area under higher plants. The studies have been carried out in "Bios-3"experimental facility described in detail elsewhere (Lisovsky, 1979; Gitelson et al., 1989). В© 1997 COSPAR. Published by Elsevier Science Ltd.

Scopus
Держатели документа:
Inst. Biophys.-Russ. Acad. of Sci., Siberian Branch, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Lisovsky, G.M.; Gitelson, J.I.; Shilenko, M.P.; Gribovskaya, I.V.; Trubachev, I.N.

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Long-term experiments on man's stay in biological life-support system / I. I. Gitelson [et al.] // Advances in Space Research. - 1989. - Vol. 9, Is. 8. - P65-71 . - ISSN 0273-1177
Кл.слова (ненормированные):
Agricultural Products -- Ecosystems -- Food Products -- Personnel - Health -- Space Flight - Manned Flight -- BIOS-3 Complex -- Phytotrons -- Spacecraft -- water -- air conditioning -- article -- biomass -- crop -- evaluation -- growth, development and aging -- human -- instrumentation -- light -- metabolism -- methodology -- microclimate -- photosynthesis -- plant -- waste management -- wheat -- Air Conditioning -- Biomass -- Crops, Agricultural -- Ecological Systems, Closed -- Evaluation Studies -- Humans -- Life Support Systems -- Light -- Photosynthesis -- Plants -- Triticum -- Waste Management -- Water
Аннотация: We describe the experimental system having maximal possible closure of material recycling in an ecosystem, including people and plants, which was carried out in a hermetically sealed experimental complex "BIOS-3", 315 m2 in volume. The system included 2 experimentators and 3 phytotrons with plants (total sowing area of 63 m2). Plants were grown with round-the-clock lamp irradiation with 130 Wm-2 PAR intensity. The plants production was food for people. Water exchange of ecosystem, as well as gas exchange, was fully closed excluding liquids and gas samples taken for chemical analysis outside the system. The total closure of material turnover constituted 91%. Health state of the crew was estimated before, during and after the experiment. A 5-months period did not affect their health. The experiments carried out prove that the closed ecosystem of "man-plants" is a prototype of a life-support system for long-term space expeditions. В© 1989.

Scopus
Держатели документа:
Institute of Biophysics, U.S.S.R. Academy of Sciences, Siberian Branch, Krasnoyarsk, 600366, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Gitelson, I.I.; Terskov, I.A.; Kovrov, B.G.; Lisovskii, G.M.; Okladnikov, Yu.N.; Sid'ko, F.Ya.; Trubachev, I.N.; Shilenko, M.P.; Alekseev, S.S.; Pan'kova, I.M.; Tirranen, L.S.

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Life support system with autonomous control employing plant photosynthesis / I. I. Gitelson [et al.] // Acta Astronautica. - 1976. - Vol. 3, Is. 9-10. - P633-650 . - ISSN 0094-5765
Кл.слова (ненормированные):
BIOCHEMICAL ENGINEERING - Photosynthesis -- SPACECRAFT -- adaptation -- article -- Chlorella -- growth, development and aging -- human -- instrumentation -- intestine -- male -- metabolism -- microbiology -- microclimate -- photosynthesis -- physiology -- plant -- space flight -- task performance -- vegetable -- water supply -- wheat -- Adaptation, Physiological -- Chlorella -- Ecological Systems, Closed -- Environment, Controlled -- Humans -- Intestines -- Life Support Systems -- Male -- Metabolism -- Photosynthesis -- Plants -- Space Simulation -- Task Performance and Analysis -- Triticum -- Vegetables -- Water Supply
Аннотация: This research was aimed at obtaining a closed control system. This was achieved by placing all the technological processes providing for human vital activities within the hermetically sealed space, and by transferring the entire control and guidance of these processes to people inhabiting the system. In contrast to existing biological life support systems, man has been included not only as a participant of metabolism, but as an operator who is the central figure in collecting information, making decisions and controlling all technological processes. To tackle this problem, the "BIOS-3" experimental complex was created for performing long-term experiments using different structures of biological life-support system. The experiment lasted six months and consisted of three stages. During the first stage the system was comprised of two equivalent phytotrons with the culture of wheat and an assortment of vegetable plants, and the living compartment. At the second stage, one of the phytotrons was removed while a compartment of chlorella cultivators was introduced. The third stage differed from the second, the former using wheat phytotron and the latter employing phytotron with an assortment of vegetable cultures. Three men inhabited the system simultaneously. The experiment demonstrated that a biological life support system controlled autonomously from the inside is feasible within a small confined space. However, immunological and microbiological research shows, that the medium created by the system is not fully adequate for man. In conclusion, some prospects have been outlined for further studies of biological life support systems. В© 1976.

Scopus
Держатели документа:
L. V. Kirensky Physics Institute, Siberian Branch, USSR Academy of Sciences, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Gitelson, I.I.; Terskov, I.A.; Kovrov, B.G.; Sidko, F.Ya.; Lisovsky, G.M.; Okladnikov, Yu.N.; Belyanin, V.N.; Trubachov, I.N.; Rerberg, M.S.

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