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首頁(yè)> 外文會(huì)議>International Conference on Environmental Systems >Hollow Fiber Membrane Bioreactor Systems for Wastewater Processing: Effects of Environmental Stresses Including Dormancy Cycling and Antibiotic Dosing
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Hollow Fiber Membrane Bioreactor Systems for Wastewater Processing: Effects of Environmental Stresses Including Dormancy Cycling and Antibiotic Dosing

機(jī)譯：用于廢水處理的中空纖維膜生物反應(yīng)器系統(tǒng)：環(huán)境壓力的影響，包括休眠循環(huán)和抗生素給藥

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Membrane-aerated biofilm reactors (MABRs) have been studied for a number of years as an alternate approach for treating wastewater streams during space exploration. While the technology provides a promising pre-treatment for lowering organic carbon and nitrogen content without the need for harsh stabilization chemicals, several challenges must be addressed before adoption of the technology in future missions. One challenge is the transportation of bioreactors containing intact, active biofilms as a means for rapid start-up on the International Space Station or beyond. Similarly, there could be a need for placing these biological systems into a dormant state for extended periods when the system is not in use, along with the ability for rapid restart. Previous studies indicated that there was little influence of storage condition (4 or 25oC, with or without bulk fluid) on recovery of bioreactors with immature biofilms (48 days old), but that an extensive recovery time was required (20+ days). Bioreactors with fully established biofilms (13 months) were able to recover from a 7- month dormancy within 4 days (~1 residence). Further dormancy and recovery testing is presented here that examines the role of biofilm age on recovery requirements, repeated dormancy cycle capabilities, and effects of long-duration dormancy cycles (8-9 months) on HFMB systems. Another challenge that must be addressed is the possibility of antibiotics entering the wastewater stream. Currently, for most laboratory tests of biological water processors, donors providing urine may not contribute to the study when taking antibiotics because the effects on the system are yet uncharacterized. A simulated urinary tract infection event, where an opportunistic, pathogenic organism, E. coli, was introduced to the HFMBs followed by dosing with an antibiotic, ciprofloxacin, was completed to study the effect of the antibiotic on reactor performance and to also examine the development of antibiotic-resistant communities within the system.
機(jī)譯：已經(jīng)研究了膜充氣的生物膜反應(yīng)器（MABR），作為治療太空勘探過(guò)程中的廢水流的替代方法。雖然該技術(shù)提供了降低有機(jī)碳和氮含量的有希望的預(yù)處理而無(wú)需苛刻的穩(wěn)定化學(xué)品，但必須在未來(lái)的任務(wù)中采用技術(shù)之前解決了幾個(gè)挑戰(zhàn)。一個(gè)挑戰(zhàn)是將含有完整的活性生物膜的生物反應(yīng)器的運(yùn)輸為國(guó)際空間站或超越國(guó)際空間站快速啟動(dòng)的手段。類(lèi)似地，當(dāng)系統(tǒng)不使用時(shí)，可能需要將這些生物系統(tǒng)放入休眠狀態(tài)，以及快速重啟的能力。以前的研究表明，儲(chǔ)存條件（4或25oC，有或沒(méi)有批量流體）對(duì)具有未成熟生物膜（48天）的生物反應(yīng)器的影響幾乎沒(méi)有影響，但需要廣泛的恢復(fù)時(shí)間（20天）。具有完全建立的生物膜（13個(gè)月）的生物反應(yīng)器能夠在4天內(nèi)從7個(gè)月的休眠中恢復(fù)（?1個(gè)住所）。此處提出了進(jìn)一步的休眠和恢復(fù)測(cè)試，介紹了生物膜年齡對(duì)恢復(fù)要求的作用，重復(fù)的休眠循環(huán)能力和長(zhǎng)期休眠循環(huán)（8-9個(gè)月）對(duì)HFMB系統(tǒng)的影響。必須解決的另一個(gè)挑戰(zhàn)是抗生素進(jìn)入廢水流的可能性。目前，對(duì)于生物水處理器的大多數(shù)實(shí)驗(yàn)室測(cè)試，當(dāng)服用抗生素時(shí)，提供尿液的捐助者可能對(duì)研究產(chǎn)生沒(méi)有貢獻(xiàn)，因?yàn)閷?duì)系統(tǒng)的影響尚未表達(dá)。一種模擬的泌尿道感染事件，其中引入HFMBS的機(jī)會(huì)主義，致病生物，大腸桿菌，然后用抗生素加入CiProfloxacin來(lái)研究抗生素對(duì)反應(yīng)器性能的影響，并檢查開(kāi)發(fā)系統(tǒng)內(nèi)的抗生素抗性社區(qū)。

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