کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4364358 1616315 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physicochemical properties of sewage sludge disintegrated with high pressure homogenization
ترجمه فارسی عنوان
خصوصیات فیزیکوشیمیایی لجن فاضلاب تجزیه شده با همگن شدن فشار بالا
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
چکیده انگلیسی


• Organic were effectively released from sludge solid after HPH.
• Sludge particle size obviously reduced and particle distribution changed after HPH.
• Zeta potential and surface tension of sludge supernatant decreased after HPH.
• Apparent viscosity of sludge supernatant increased after HPH.

High pressure homogenization (HPH) pretreatment can improve the sludge anaerobic digestion; however, the physical and chemical properties of homogenized sludge are completely unclear. The effect of HPH treatment on the physicochemical properties of homogenized sludge was studied. The disintegration degree and soluble chemical oxygen demand increased with the increment of homogeneous pressure and cycle, showing effective organic release from sludge solid to liquid after HPH treatment. Besides the organic, volatile fatty acid and NH4+-N were also released. The HPH treatment significantly disrupted sludge flocs, and the median sludge size starkly decreased from 48.26 to a range of 9.375–15.54 μm. The increase of homogenization pressure and cycle led to an insignificant change of sludge particle size, but the distribution of sludge particle size obviously changed and the volume of small particles obviously increased. Zeta potential of sludge liquid obviously decreased and apparent viscosity significantly increased after HPH treatment; however, the homogenization pressure and cycle displayed insignificant influence on them. Surface tension of sludge liquid decreased with the increase of homogenization pressure and cycle. The change of sludge physiochemical properties may be mainly attributed to the extracellular polymeric substances release from sludge flocs. The results may provide deeper insights why the sludge anaerobic digestion can be effectively improved by HPH pretreatment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 102, August 2015, Pages 126–130
نویسندگان
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