Study of the efficiency of moving bed biofilm reactor (MBBR) in LAS Anionic Detergent removal from hospital wastewater: determination of removing model according to response surface methodology (RSM)

2018 ◽  
Vol 2017 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Reza Shokoohi ◽  
Zahra Torkshavand ◽  
Hassan Zolghadnasab ◽  
Mohammad Yousef Alikhani ◽  
Meisam Sedighi Hemmat
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
High Efficiency ◽  
Oxygen Demand ◽  
Laboratory Method ◽  
Biofilm Reactor ◽  
Hospital Wastewater ◽  
Moving Bed Biofilm Reactor ◽  
Alkyl Benzene Sulfonate ◽  
Moving Bed

Abstract Detergents are considered one of the important pollutants in hospital wastewater. Achieving efficient and bio-friendly methods for the removal of these pollutants is considered as a concern for environmental researchers. This study aims at studying the efficiency of a moving bed biofilm reactor (MBBR) system for removing linear alkyl benzene sulfonate (LAS) from hospital wastewater with utilization of response surface methodology (RSM). The present study was carried out on a reactor with continuous hydraulic flow using media k1 at pilot scale to remove detergent from hospital wastewater. The effect of independent variables including contact time, percentage of media filling and mixed liquor suspended solids (MLSS) concentration of 1000-3000 mg/l on the system efficiency were assessed. Methylene blue active substances (MBAS) and chemical oxygen demand (COD) 750-850 mg/l were used by closed laboratory method in order to measure the concentration of LAS. The results revealed that the removal efficiency of LAS detergent and COD using media k1, retention time of 24 hours, and MLSS concentration of around 3,000 mg/l were 92.3 and 95.8%, respectively. The results showed that the MBBR system as a bio-friendly compatible method has high efficiency in removing detergents from hospital wastewater and can achieve standard output effluent in acceptable time.

scholarly journals Optimising nutrient removal of a hybrid five-stage Bardenpho and moving bed biofilm reactor process using response surface methodology

2019 ◽  
Vol 7 (1) ◽  
pp. 102861 ◽  
Author(s):  
Elham Ashrafi ◽  
Arjomand Mehrabani Zeinabad ◽  
Seyed Mehdi Borghei ◽  
Elena Torresi ◽  
Julian Muñoz Sierra
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Nutrient Removal ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed

scholarly journals Optimization of operational parameters in moving bed biofilm reactor with low cost polystyrene biocarrier by the response surface method

2015 ◽  
Vol 52 (1) ◽  
pp. 26-41 ◽  
Author(s):  
Anjali Barwal ◽  
Rubina Chaudhary
Keyword(s):  
Response Surface ◽  
Low Cost ◽  
Oxygen Demand ◽  
Aeration Rate ◽  
Filling Ratio ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Operational Parameters ◽  
Statistical Tool ◽  
Moving Bed

The combined effects of three independent variables (carrier filling ratio, aeration rate and reactor run time (RRT)) were evaluated in a continuous moving bed biofilm reactor (MBBR) through central composite design (CCD) of the response surface methodology (RSM) for experimental design, analysis and process optimization for municipal wastewater treatment processes. A low-cost polystyrene biocarrier was designed and its efficiency in terms of organic and nutrient removal was evaluated in an MBBR. A mathematical–statistical tool represented by CCD was employed to assess the interactive effects of the three key independent operational parameters, inclusive of biocarrier filling ratio (0–70%), aeration rate (0.21–0.63 m3 h–1) and RRT (1–15 days), on the removal efficiency of chemical oxygen demand (COD), biochemical oxygen demand (BOD), total Kjeldahl nitrogen (TKN), total phosphorus (TP) and turbidity. The maximum efficiency obtained was at carrier filling rate 50%, aeration rate 0.42 m3 h–1 and RRT of 9 days, respectively. The results obtained for COD, BOD, TKN, TP and turbidity were 91.6, 92.9, 72.0, 55.0 and 46.0%, respectively. This study provides valuable information about interrelations of process parameters at different values of the operating variables. The results illustrate that this statistical tool could be effectively utilized for effluent organic load, nutrient and turbidity removal.

scholarly journals Partial Nitrification in a Sequencing Moving Bed Biofilm Reactor (SMBBR) with Zeolite as Biomass Carrier: Effect of Sulfide Pulses and Organic Matter Presence

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2484
Author(s):  
César Huiliñir ◽  
Vivian Fuentes ◽  
Carolina Estuardo ◽  
Christian Antileo ◽  
Ernesto Pino-Cortés
Keyword(s):  
Organic Matter ◽  
Sulfide Oxidation ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Biofilm Reactor ◽  
Partial Nitrification ◽  
Liquid Volume ◽  
Nitrite Accumulation ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed

This work aimed to achieve partial nitrification (PN) in a Sequencing Moving Bed Biofilm Reactor SMBBR with zeolite as a biomass carrier by using sulfide pulses in the presence of organic matter as an inhibitor. Two conditions were evaluated: sulfide (HS−) = 5 mg S/L and vvm (air volume per liquid volume per minute, L of air L−1 of liquid min−1) = 0.1 (condition 1); and a HS− = 10 mg S/L and a vvm = 0.5 (condition 2). The simultaneous effect of organic matter and sulfide was evaluated at a Chemical Oxygen Demand (COD) = 350 mg/L and HS− = 5 mg S/L, with a vvm = 0.5. As a result, using the sulfide pulse improved the nitrite accumulation in both systems. However, Total Ammonia Nitrogen (TAN) oxidation in both processes decreased by up to 60%. The simultaneous presence of COD and sulfide significantly reduced the TAN and nitrite oxidation, with a COD removal yield of 80% and sulfide oxidation close to 20%. Thus, the use of a sulfide pulse enabled PN in a SMBBR with zeolite. Organic matter, together with the sulfide pulse, almost completely inhibited the nitrification process despite using zeolite.

Enhanced simultaneous nitri-denitrification in aerobic moving bed biofilm reactor containing polyurethane foam-based carrier media

2019 ◽  
Vol 79 (3) ◽  
pp. 510-517 ◽  
Author(s):  
Magdum Sandip ◽  
V. Kalyanraman
Keyword(s):  
Chemical Oxygen Demand ◽  
Nitrogen Removal ◽  
Oxygen Demand ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Removal Capacity ◽  
Pu Foam ◽  
Removal Efficiencies ◽  
Biofilm Support

Abstract Fluidization of carrier media for biofilm support and growth defines the moving bed biofilm reactor (MBBR) process. Major MBBR facilities apply virgin polyethylene (PE)-based circular plastic carrier media. Various carriers were studied to replace these conventional carriers, but polyurethane (PU) foam-based carrier media has not been much explored. This study evaluates the potential of PU foam carrier media in aerobic MBBR process for simultaneous nitri-denitrification (SND). Two parallel reactors loaded with conventional PE plastic (circular) and PU foam (cubical) carriers compared for their removal efficiencies of chemical oxygen demand (COD) and nitrogen contaminants from wastewater. Results indicate that average COD removal in MBBR containing PE plastic carrier media was 81%, compared to 83% in MBBR containing PU foam. Average ammonical and total nitrogen reduction was 71% and 59% for PU foam-based MBBR, compared to 60% and 42% for PE plastic-based MBBR. SND-based nitrogen removal capacity was doubled in aerobic MBBR filled with PU foam carrier media (27%), than MBBR containing PE plastic carrier media (13%). Cost economics also governs the commercial advantage for the application of PU foam-based carrier media in the MBBR process.

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