کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5740405 1616296 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of microbial accumulation in biological sulphate reduction using lactate as electron donor in an inversed fluidized bed bioreactor: Operation and dynamic mathematical modelling
ترجمه فارسی عنوان
نقش تجمع میکروبی در کاهش بیولوژیکی سولفات با استفاده از لاکتات به عنوان تکمیل کننده الکترون در یک بیوراکتور واگن سیلیسی با بستر: عملیات و مدل سازی ریاضی پویا
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
چکیده انگلیسی


- Microbial substrate accumulation in sulphate reduction in a continuous bioreactor is studied.
- Step feed changes were applied to investigate the impact of substrate accumulation.
- Substrate accumulation should be included in the control strategy for biogenic sulphide production.
- The validated mathematical model was able to simulate the accumulation of both PHB and sulphate.

This study evaluated the impact of substrate accumulation (sulphate and polyhydroxybutyrate (PHB)) on bioprocess control of a sulfate reducing inversed fluidized bed bioreactor. To investigate the impact of substrate accumulation, step feed changes were induced to an inversed fluidized bed bioreactor performing biological sulphate reduction. A first step feed change set both the chemical oxygen demand (COD) and sulphate influent concentration to zero. As hypothesised, sulphide was still being produced after 15 days of operation without electron donor and sulphate supply. This suggests that accumulated and/or sorbed COD and sulphate supported the continued biological sulphide production. PHB was indeed found present in the sludge and batch tests showed PHB can support the sulphate reduction. A second step feed change of adding solely COD (and no sulphate) to the bioreactor influent resulted in a continuous production of sulphide, suggesting that sulphate had accumulated in the inversed fluidized bed bioreactor sludge. A mathematical model that includes microbial growth, PHB and sulphate storage as well as metabolism of lactate oxidizing sulphate reducing bacteria was developed, calibrated and validated. The model was able to simulate the accumulation of both PHB and sulphate in the inversed fluidized bed bioreactor.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 121, July 2017, Pages 1-10
نویسندگان
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