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Effect of Dispersion Treatment on Dairy Waste Activated Sludge to Hasten the Production of Biogas

handle: 11250/3046347
Le potentiel de solubilisation du prétraitement biologique des boues activées résiduaires (WAS) est limité en raison de sa structure en flocs. Les substances polymères supplémentaires (EPS) sont responsables de la formation de flocs. Dans cette enquête, une tentative a été faite pour perturber la structure des flocs de WAS en éliminant les EPS à travers le disperseur. Dans la première étape, le traitement du disperseur a libéré 242 mg/L d'EPS soluble à 3000 tr/min avec la durée des années 50 et provoque une défloculation de L'IS. Au cours de la deuxième étape, les boues défloculées ont été soumises à un prétraitement bactérien afin d'évaluer l'effet de la perturbation des flocs. Au cours du prétraitement bactérien, il a été constaté que les boues défloculées produisaient une solubilisation organique plus élevée de 23,9 % et une réduction des solides en suspension de 19,1 %, par rapport au témoin (10,2 %) et (8,7 %), respectivement. Un rendement en biogaz de 220 mL/g de DCO a été enregistré dans les boues défloculées et de 93 mL/g de DCO dans les boues floculées. De ce qui précède, il est évident que la défloculation a efficacement amélioré le prétraitement bactérien conduisant à plus de solubilisation et de production de biogaz.
El potencial de solubilización del pretratamiento biológico para los lodos activados residuales (WAS) es limitado debido a su estructura de flóculos. Las sustancias extra poliméricas (eps) son responsables de la formación de flóculos. En esta investigación, se ha intentado perturbar la estructura del flóculo de WAS mediante la eliminación de eps a través del dispersador. En la primera etapa, el tratamiento dispersor liberó 242 mg/L de eps soluble a 3000 rpm con la duración de los 50s y provoca la desfloculación de WAS. En la segunda etapa, el lodo desfloculado se sometió a un pretratamiento bacteriano para evaluar el efecto de la interrupción del flóculo. Durante el pretratamiento bacteriano, se encontró que los lodos desfloculados produjeron una mayor solubilización orgánica del 23,9% y una reducción de sólidos en suspensión del 19,1%, en comparación con el control (10,2%) y (8,7%), respectivamente. Se registró un rendimiento de biogás de 220 ml/g de DQO en lodo desfloculado y 93 ml/g DE DQO en lodo floculado. De lo anterior, es evidente que la desfloculación mejoró efectivamente el pretratamiento bacteriano, lo que condujo a una mayor solubilización y producción de biogás.
The solubilisation potential of biological pretreatment for waste activated sludge (WAS) is limited due to its floc structure. Extra polymeric substances (EPS) is responsible for floc formation. In this investigation, an attempt has been made to disturb floc structure of WAS by removing EPS through disperser. In first stage, disperser treatment released 242 mg/L of soluble EPS at 3000 rpm with the duration of the 50s and causes deflocculation of WAS. In second stage, deflocculated sludge was subjected to bacterial pretreatment to assess the effect of floc disruption. During bacterial pretreatment, it was found that deflocculated sludge produced higher organic solubilization of 23.9% and suspended solids reduction of 19.1%, when compared to control (10.2%) and (8.7%), respectively. A biogas yield of 220 mL/g COD was recorded in deflocculated sludge and 93 mL/g COD in flocculated sludge. From the above, it is evident that deflocculation effectively enhanced bacterial pretreatment leading to more solubilization and biogas production.
إن إمكانات الذوبان للمعالجة المسبقة البيولوجية للحمأة المنشطة بالنفايات (WAS) محدودة بسبب هيكلها. المواد البوليمرية الإضافية (EPS) هي المسؤولة عن تكوين الندف. في هذا التحقيق، بُذلت محاولة لإزعاج هيكل التدفق عن طريق إزالة EPS من خلال الموزع. في المرحلة الأولى، أطلق العلاج بالمشتت 242 مجم/لتر من EPS القابل للذوبان عند 3000 دورة في الدقيقة مع مدة الخمسينيات ويسبب التلبد. في المرحلة الثانية، تعرضت الحمأة المفرغة للمعالجة البكتيرية المسبقة لتقييم تأثير اضطراب التدفق. أثناء المعالجة المسبقة للبكتيريا، وجد أن الحمأة المفرغة أنتجت ذوبانًا عضويًا أعلى بنسبة 23.9 ٪ وانخفاضًا في المواد الصلبة العالقة بنسبة 19.1 ٪، عند مقارنتها بالسيطرة (10.2 ٪) و (8.7 ٪)، على التوالي. تم تسجيل ناتج غاز حيوي قدره 220 مل/جم COD في الحمأة التي تم تفريغها و 93 مل/جم COD في الحمأة التي تم تلبدها. مما سبق، من الواضح أن إزالة التلبد عززت بشكل فعال المعالجة المسبقة للبكتيريا مما أدى إلى المزيد من الذوبان وإنتاج الغاز الحيوي.
- An Giang University Viet Nam
- Kyonggi University Korea (Republic of)
- University of Stavanger Norway
- Duy Tan University Viet Nam
- University of Stavanger Norway
Pulp and paper industry, Biogas, Organic chemistry, Biochemistry, Industrial and Manufacturing Engineering, Engineering, anaerobic biodegradability, Physics, Microbial Nitrogen Cycling in Wastewater Treatment Systems, Pollution, Sewage treatment, Chemistry, Physical Sciences, Anaerobic Digestion and Biogas Production, Methane, Composite material, deflocculation, Environmental engineering, disperser treatment, General Works, Environmental science, Anaerobic digestion, A, cell disintegration, biogas, Solubilization, Waste management, Disperser, FOS: Environmental engineering, Flocculation, Optics, Building and Construction, Biogas production, Dispersion (optics), Materials science, Waste Treatment, VDP::Teknologi: 500, Activated Sludge, Activated sludge, Environmental Science, Phosphorus Recovery and Sustainable Management, Wastewater Treatment, Volatile suspended solids
Pulp and paper industry, Biogas, Organic chemistry, Biochemistry, Industrial and Manufacturing Engineering, Engineering, anaerobic biodegradability, Physics, Microbial Nitrogen Cycling in Wastewater Treatment Systems, Pollution, Sewage treatment, Chemistry, Physical Sciences, Anaerobic Digestion and Biogas Production, Methane, Composite material, deflocculation, Environmental engineering, disperser treatment, General Works, Environmental science, Anaerobic digestion, A, cell disintegration, biogas, Solubilization, Waste management, Disperser, FOS: Environmental engineering, Flocculation, Optics, Building and Construction, Biogas production, Dispersion (optics), Materials science, Waste Treatment, VDP::Teknologi: 500, Activated Sludge, Activated sludge, Environmental Science, Phosphorus Recovery and Sustainable Management, Wastewater Treatment, Volatile suspended solids
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