کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6664068 | 1427043 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-situ prevention of hydrogen sulfide formation during anaerobic digestion using zinc oxide nanowires
ترجمه فارسی عنوان
جلوگیری از تشکیل سولفید هیدروژن در حین هضم بی هوازی با استفاده از نانوسیمهای روی اکسید
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کلمات کلیدی
سولفید هیدروژن، بیوگاز، هضم بی هوازی نانوسیم اکسید فلزی، اکسید روی، جاذب واکنش پذیر،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The utilization of Anaerobic Digestion (AD) technology for biogas and energy generation is often hindered by high concentration of sulfur-containing compounds in wastewater and consequential hydrogen sulfide (H2S) in biogas. In this work, we demonstrated a process, where independent mechanisms of anaerobic microorganisms and an inorganic reactive adsorbent (zinc oxide nanowires) worked synergistically to remove soluble sulfide (HSâ) and prevent H2S formation during AD. Using a model aqueous sodium sulfide (Na2S) system, the nanowires (dosage 1Â g/L) effectively removed sulfides from the Na2S solution to a maximum of 625Â mg S2â/L per gram of ZnO. During 24Â h and 3-day long (involving three consecutive sulfate feeding cycles) AD studies using anaerobic microbial medium (2Â g/L SO42â and 1Â g/L ZnO), no decrease in methanogenic activity and biogas production were observed using the ZnO nanowires, indicating that the nanowires can reduce the sulfide toxicity during AD. The post-process analysis of the recovered nanomaterial using energy-dispersive X-ray spectroscopy and X-ray diffraction showed the presence of sulfur and zinc sulfide (ZnS), respectively, validating HSâ removal by the nanowires. This process intensification approach of combining AD and H2S removal into a single process step will help extend AD technology to high sulfate containing wastewaters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 1, February 2018, Pages 110-118
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 1, February 2018, Pages 110-118
نویسندگان
Robert Lupitskyy, Dania Alvarez-Fonseca, Zachary D. Herde, Jagannadh Satyavolu,