Title of article
Process Performance of a Granular Single Bioreactor with Continuous Feeding and Intermittent Discharge Regime Treating Dairy Wastewater
Author/Authors
Jamshidi, M Environmental research Center (ERC) - Department of Applied Chemistry - Faculty of Chemistry - Razi University, Kermanshah, Iran , Zinatizadeh, A.A Environmental research Center (ERC) - Department of Applied Chemistry - Faculty of Chemistry - Razi University, Kermanshah, Iran , Rezaee, S Environmental research Center (ERC) - Department of Applied Chemistry - Faculty of Chemistry - Razi University, Kermanshah, Iran , Asadi, A Environmental research Center (ERC) - Department of Applied Chemistry - Faculty of Chemistry - Razi University, Kermanshah, Iran
Pages
8
From page
10
To page
17
Abstract
In this study, granulated sludge synthesized in a sequence batch reactor (SBR) and then granulated sludge was transferred to continuous feeding and intermittent discharge (CFID) bioreactor. Two independent variables (air flow rate and hydraulic retention time (HRT)) were considered to optimize the process. Subsequently, long term performance (150 days) of the bioreactor was assessed by monitoring nine responses. The process optimization in CFID regime was performed using a central composite face-centered design (CCFD) and analyzed using response surface methodology (RSM). Based on obtained data, the optimum conditions were achieved at HRT of 7-8 h and air flow rate of 2-3.5 L/min. The CFID with granular sludge acted as a high rate bioreactor as the granular sludge could provide high MLSS concentrations (around 10000 mg/L) in a bioreactor.
Farsi abstract
در اين مطالعه، لجن گرانول در يك راكتور سري (SBR ) سنتر شده و پس از آن لجن گرانوليت به تغذيه مداوم و تخليه متناوب (CFID) منتقل مي شود. دو متغير مستقل (سرعت جريان هواي و زمان رفع هيدروليكي) براي بهينه سازي اين فرايند مورد توجه قرار گرفتند. پس از آن، عملكرد طولاني مدت (150 روز) بيوراكتور توسط نظارت بر 9 پاسخ بررسي شد. بهينه سازي فرآيند در رژيم CFID با استفاده از يك مركز مركري مركب مركري (CCFD) انجام شد و با استفاده از روش سطح پاسخ (RSM) مورد تجزيه و تحليل قرار گرفت. بر اساس داده هاي به دست آمده، شرايط بهينه در 8HRT تا 8 ساعت و سرعت جريان هوا 3-5-3 ليتر در دقيقه بود. CFID با لجن گرانروي به عنوان يك بيوراكتور با سرعت بالا عمل مي كند و لجن گرانول مي تواند غلظت MLSS بالا (حدود 10000 ميلي گرم در ليتر) در بيوراكتور فراهم كند.
Keywords
Discharge Bioreactor , Continuous Feeding and Intermittent , Granular Sludge , Dairy Wastewater , Carbon and Nutrients Removal
Serial Year
2019
Record number
2496243
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