scholarly journals Biological treatment of milk processing wastewater in a sequencing batch flexible fibre biofilm reactor

2009 ◽  
Vol 4 (5) ◽  
pp. 698-703 ◽  
Author(s):  
Mohamed Abdulgader ◽  
Qiming Jimmy Yu ◽  
Ali Zinatizadeh ◽  
Philip Williams
Keyword(s):  
Biological Treatment ◽  
Biofilm Reactor ◽  
Milk Processing

scholarly journals Distribution and Removal of Pharmaceuticals in Liquid and Solid Phases in the Unit Processes of Sewage Treatment Plants

2020 ◽  
Vol 17 (3) ◽  
pp. 687 ◽  
Author(s):  
Junwon Park ◽  
Changsoo Kim ◽  
Youngmin Hong ◽  
Wonseok Lee ◽  
Hyenmi Chung ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Biological Treatment ◽  
Sewage Treatment ◽  
Biofilm Reactor ◽  
Relative Distribution ◽  
Biological Processes ◽  
Sewage Treatment Plants ◽  
Treatment Processes ◽  
Mass Load ◽  
Removal Efficiencies

In this study, we analyzed 27 pharmaceuticals in liquid and solid phase samples collected from the unit processes of four different sewage treatment plants (STPs) to evaluate their distribution and behavior of the pharmaceuticals. The examination of the relative distributions of various categories of pharmaceuticals in the influent showed that non-steroidal anti-inflammatory drugs (NSAIDs) were the most dominant. While the relative distribution of antibiotics in the influent was not high (i.e., 3%–5%), it increased to 14%–30% in the effluent. In the four STPs, the mass load of the target pharmaceuticals was reduced by 88%–95% mainly in the biological treatment process, whereas the ratio of pharmaceuticals in waste sludge to those in the influent (w/w) was only 2%. In all the STPs, the removal efficiencies for the stimulant caffeine, NSAIDs (acetaminophen, naproxen, and acetylsalicylic acid), and the antibiotic cefradine were high; they were removed mainly by biological processes. Certain compounds, such as the NSAID ketoprofen, contrast agent iopromide, lipid regulator gemfibrozil, and antibiotic sulfamethoxazole, showed varying removal efficiencies depending on the contribution of biodegradation and sludge sorption. In addition, a quantitative meta-analysis was performed to compare the pharmaceutical removal efficiencies of the biological treatment processes in the four STPs, which were a membrane bioreactor (MBR) process, sequencing batch reactor (SBR) process, anaerobic–anoxic–oxic (A2O) process, and moving-bed biofilm reactor (MBBR) process. Among the biological processes, the removal efficiency was in the order of MBR > SBR > A2O > MBBR. Among the tertiary treatment processes investigated, powdered activated carbon showed the highest removal efficiency of 18%–63% for gemfibrozil, ibuprofen, ketoprofen, atenolol, cimetidine, and trimethoprim.

Combination of photo-Fenton and biological SBBR processes for sulfamethoxazole remediation

2008 ◽  
Vol 58 (9) ◽  
pp. 1707-1713 ◽  
Author(s):  
O. González ◽  
M. Esplugas ◽  
C. Sans ◽  
S. Esplugas
Keyword(s):  
Biological Treatment ◽  
Fenton Reaction ◽  
Biofilm Reactor ◽  
Synthetic Wastewater ◽  
Total N ◽  
Sequencing Batch Biofilm Reactor ◽  
N Removal ◽  
Start Up ◽  
C And N ◽  
Combined Strategy

A combined strategy of a photo-Fenton pretreatment followed by a Sequencing Batch Biofilm Reactor (SBBR) was evaluated for total C and N removal from a synthetic wastewater containing 200 mg L−1 of the antibiotic Sulfamethoxazole (SMX). Photo-Fenton reaction was performed with two different H2O2 concentrations (300 and 400 mg L−1) and 10 mg L−1 of Fe2 + . The pre-treated effluents with the antibiotic intermediates as sole carbon source, together with a nutrients solution, were used as feed for the biological reactor. The SBBR was operated under aerobic conditions to mineralize the organic carbon and the hydraulic retention time (HRT) was optimized down to 8 hours. Then, an anoxic denitrification stage of 24 hours of HRT was added right after the aerobic stage of the same duration in order to remove the NO3− generated along the chemical–biological treatment. TOC, COD and SMX concentrations together with O2 uptake rate (OUR) profiles were monitored in purpose of assessing the performance of the system. NO3−, NH4+ and total N concentrations were analyzed to find out the fate of N contained in the initial SMX molecule. A start up strategy resulted in the correct formation of a biofilm over the volcanic support. The total TOC removals achieved with the combination of the chemical and the biological processes were 75.7 and 87.7% for the low and the high H2O2 concentration pretreatments respectively. Practically all N present in the SMX solution was eliminated in the SBBR when the aerobic–anoxic strategy was used.

Biodegradation of Diesel Contaminated Wastewater Using a Three-Phase Fluidized Bed Reactor

2021 ◽  
Author(s):  
Gisselly Anania Muñoz
Keyword(s):  
Fluidized Bed ◽  
Diesel Fuel ◽  
Biological Treatment ◽  
Biofilm Reactor ◽  
Synthetic Wastewater ◽  
Contaminated Sites ◽  
Reactor Performance ◽  
Flowing Liquid ◽  
Three Phase ◽  
Effective Technology

The use of petroleum-derived products has given rise to environmental concerns regarding hydrocarbon pollution. Therefore, the development of innovative techologies for the clean-up of contaminated sites is a challenge. This thesis is an investigation of a three-phase fluidized bed biofilm reactor, as an effective technology for biological treatment of diesel-contaminated wastewater. The three-phase fluidized bed utilized in this research consists of support media (diameter of 600 um) with biofilm, and gas phase (air at 1.0 cm/s) in up flowing liquid (feedwater at 0.02 cm/s). The reactor influent is synthetic wastewater varying in COD concentrations in the range of 550-1300 mg/l and diesel concentrations between 70 and 200 mg/L. The results indicate that diesel fuel can be removed in the reactor with efficiencies up to 100% at a hydraulic detention time of 4 hours. Good quality effluent means a good reactor performance, where 55% of the diesel fuel was removed due to biological process.

Research on the Experimental Device of Combined Two-Phase ABR and SBR

2014 ◽  
Vol 507 ◽  
pp. 677-681
Author(s):  
Ling Jing ◽  
Xin Xia Wang
Keyword(s):  
Mass Transfer ◽  
Wastewater Treatment ◽  
Biological Treatment ◽  
High Efficiency ◽  
Low Cost ◽  
Rapid Development ◽  
Water Environment ◽  
Biofilm Reactor ◽  
Treatment Technology ◽  
Two Phase

With the rapid development of industrial and agricultural production in China, the industrial waste water and city wastewater discharged to water environment are increasing. Anaerobic biological treatment is a low-cost wastewater treatment technology and is also a combined technology of the wastewater treatment and energy recovery, it can be used as a core part of energy production and environmental protection system, its product can be actively used to result economic value. After in-depth and systematically study the mechanism and mass transfer theory of anaerobic biological treatment technology, this paper designs anaerobic reactor of high efficiency in mass transfer, namely the anaerobic baffled - elastic packing biofilm reactor.

Technology of membrane biofilm reactors operated under periodically changing process conditions

1995 ◽  
Vol 31 (1) ◽  
pp. 173-183 ◽  
Author(s):  
Peter A. Wilderer
Keyword(s):  
Biological Treatment ◽  
Biofilm Reactor ◽  
Contaminated Groundwater ◽  
Process Conditions ◽  
Biofilm Growth ◽  
Biofilm Reactors ◽  
Current State ◽  
Sequencing Batch Biofilm Reactor ◽  
Novel Approaches ◽  
Slow Growing

Biological treatment of problematic wastewaters requires the application of specialized reactor systems and operation strategies. Two novel approaches to meet the specific requirements are discussed: (1) application of gas permeable membranes as a means to transfer oxygen into the reactor, and to provide surface area for biofilm growth, and (2) operation of biofilm reactors in a fill and draw mode (Sequencing Batch Biofilm Reactor (SBBR) Technology). Membrane oxygenation and biofilm SBR technology can be favourably combined to treat wastewaters which contain volatile organics, organics in low concentration (e.g. contaminated groundwater) or organics which are degraded only by selected, slow growing microorganisms. The current state of reactor development is summarized. Examples for reactor design are given.

Treatment of integrated newsprint mill wastewater in moving bed biofilm reactors

1997 ◽  
Vol 35 (2-3) ◽  
pp. 173-180 ◽  
Author(s):  
A. Broch-Due ◽  
R. Andersen ◽  
B. Opheim
Keyword(s):  
Biological Treatment ◽  
Chemical Precipitation ◽  
Biofilm Reactor ◽  
Treated Wastewater ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Biofilm Reactors ◽  
Untreated Wastewater ◽  
Removal Efficiencies ◽  
Subsequent Chemical

Wastewaters from three integrated newsprint mills have been treated in a pilot plant Moving Bed Biofilm Reactor (MBBR). In the MBBR the biomass adheres to small plastic elements which move freely along with the water in the reactor. A reduction of 65-75% for COD and 85-95% for BOD was obtained at HRT of 4-5 hours. By prolonging the HRT the removal efficiencies of COD and BOD increased to about 80% and 96%, respectively. With a subsequent chemical precipitation a removal efficiency of COD up to 95% was achieved. The amount of chemicals needed for precipitation of the biologically treated wastewater was only a quarter to a third of that needed for chemical treatment of the untreated wastewater. The results showed the MBBR process to be competitive with conventional biological treatment systems and that treatment objectives can be met at short HRTs.

Sign in / Sign up

Export Citation Format

Share Document