کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5116350 1485217 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Carbohydrate based polymeric materials as slow release electron donors for sulphate removal from wastewater
ترجمه فارسی عنوان
مواد پلیمری بر پایه کربوهیدرات به عنوان اهداکنندگان الکترون آزاد برای حذف سولفات از فاضلاب
کلمات کلیدی
باکتری های کاهش دهنده سولفات، باکتری های تخمیری هیدرولیتیک، پلیمرهای بر پایه کربوهیدرات، اهدا کنندگان الکترون آزاد آزاد،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


- Carbohydrate based polymers can be used as slow release electron donors for sulphate reduction.
- Potato, paper and crab shell exhibited different hydrolysis-fermentation rates.
- The hydrolysis-fermentation rates limited the sulphate reduction process.

Many industrial sulphate rich wastewaters are deficient in electron donors to achieve complete sulphate removal. Therefore, pure and expensive chemicals are supplied externally. In this study, carbohydrate based polymers (CBP) as potato (2 and 5 mm3), filter paper (2 and 5 mm2) and crab shell (2 and 4 mm Ø) were tested as slow release electron donors (SRED) for biological sulphate reduction at 30 °C and initial pH of 7.0. Using the CBP as SRED, sulphate reduction was carried out at different rates: filter paper 0.065-0.050 > potato 0.022-0.034 > crab shell 0.006-0.009 mg SO42−.mg VSS−1d−1. These were also affected by the hydrolysis-fermentation rates: potato 0.087-0.070 > filter paper 0.039-0.047 > crab shell 0.011-0.028 mg CODS.mg VSS−1d−1, respectively. Additionally, the sulphate removal efficiencies using filter paper (cellulose, > 98%), potato (starch, > 82%) and crab shell (chitin, > 32%) were achieved only when using CBP as SRED and in the absence of other easily available electron donors. This study showed that the natural characteristics of the CBP limited the hydrolysis-fermentation step and, therefore, the sulphate reduction rates.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 200, 15 September 2017, Pages 407-415
نویسندگان
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