Current state and challenges of full-scale membrane bioreactor applications: A critical review

2019 ◽  
Vol 271 ◽  
pp. 473-481 ◽  
Author(s):  
Kang Xiao ◽  
Shuai Liang ◽  
Xiaomao Wang ◽  
Chunsheng Chen ◽  
Xia Huang
Keyword(s):  
Critical Review ◽  
Membrane Bioreactor ◽  
Full Scale ◽  
Current State

Membrane Bioreactor in China: A Critical Review

2015 ◽  
Vol 2 (2) ◽  
pp. 29-47 ◽  
Author(s):  
Kaisong Zhang ◽  
◽  
Olusegun Abass ◽  
Xing Wu ◽  
Youzhi Guo
Keyword(s):  
Critical Review ◽  
Membrane Bioreactor

Experiment of Polyester Wastewater Treatment by Aerobic Membrane Bioreactor and an Engineering Application

2012 ◽  
Vol 518-523 ◽  
pp. 2130-2137
Author(s):  
Si Hao Lv ◽  
Hui Chang ◽  
Zhi Hui Liang ◽  
Yan Yan Zeng ◽  
Hong Bo Fan
Keyword(s):  
Water Quality ◽  
Pilot Study ◽  
Membrane Bioreactor ◽  
Suspended Solids ◽  
Loading Rate ◽  
Engineering Application ◽  
Full Scale ◽  
Effluent Water ◽  
Small Influence ◽  
Volumetric Loading

A pilot study was carried out to evaluate the application of aerobic submerged MBR in treating polyester wastewater and a full scale system in which MBR was adopted as the key aspect was put forward to treat the polyester wastewater of Zhuhai Yuhua Polyester co., Ltd., China. The pilot study revealed that HRT could be affected by the influent COD, and a HRT larger than 36h was proposed for treating polyester wastewater by MBR. Volumetric loading rate and sludge loading rate ranged in 0.7-2.0 kgCOD/m3•d and 0.09~0.24 kgCOD/ kgMLSS•d respectively were of small influence on the COD removal. DO in the range of 2.5-4.0 mg/L seemed to be optimal for avoiding limitations due to oxygen concentration and creating an effective turbulence. The modified full scale system which includes anaerobic digesting tank and MBR followed by a stabilization pond was verified to be effective to treat the polyester wastewater in the latest two years. The results illustrated that the effluent water quality could meet the discharge limits of water pollutants (DB 44/26-2001) which was established in Guangdong, China. Observed sludge yield of the system fluctuated between 0.10-0.18 gMLSS/gCOD and averaged at 0.137 gMLSS/gCOD. The membrane permeate at around 10 L/m2h, TMP of less than 0.7bar, and total mixed liquor suspended solids (MLSS) between 6-7g/L were suitable to operate the MBR.

Application of membrane bioreactor system with full scale plant on livestock wastewater

2005 ◽  
Vol 51 (6-7) ◽  
pp. 465-471 ◽  
Author(s):  
H. Kim ◽  
H.-S. Kim ◽  
I.-T. Yeom ◽  
Y.-B. Chae
Keyword(s):  
Organic Matter ◽  
Membrane Bioreactor ◽  
Full Scale ◽  
Nitrogen And Phosphorus ◽  
Livestock Wastewater ◽  
Bioreactor System ◽  
High Level

A full-scale plant of an MBR system treating livestock wastewater has shown impressive results. The Cheorwon County Environmental Authorities adopted the MBR process with UF membrane for retrofitting the old plant, which removes organic matter, nitrogen and phosphorus at a high level. According to 6 months operation data, BOD and SS removal were about 99.9% and CODMn, TN and TP removal were 92.0%, 98.3% and 82.7%, respectively. It is considered that the temperature at the bioreactor has to be controlled to be below 40 °C so as to ensure sufficient nitrification. It appeared that the MBR system is competitive with other conventional technologies for treatment of livestock wastewater such as piggery waste.

scholarly journals Treatment for Pediatric Aphasia: A Critical Review

2020 ◽  
Author(s):  
K. L. Cox ◽  
L. O. Froeschke ◽  
R. E. Schumacher ◽  
Brenda Gorman
Keyword(s):  
Critical Review ◽  
Observational Studies ◽  
Language Intervention ◽  
Clinical Implications ◽  
Functional Communication ◽  
Language Outcomes ◽  
Adequate Description ◽  
Current State ◽  
Rising Incidence ◽  
Aphasia Recovery

Objective: The primary aim of this study was to summarize the current state-of-science for principles and practices of intervention in acquired pediatric aphasia (APA). A secondary aim was to identify gaps in research regarding interventional frameworks, and to identify key areas of future inquiry to optimize language outcomes. Conclusions: Although epidemiologic data indicate rising incidence in  APA, limited research on recovery and intervention exists. Results suggest that language intervention supports aphasia recovery; however, available data lack adequate description of methodologies to make crosscomparisons and dosage recommendations possible. Evidence from observational studies suggests that a) pediatric recovery is not necessarily more rapid nor complete than adult recovery; b) principles of neuroplasticity may be applied to pediatric aphasia; however prognostication may be affected by developmental stage and presence of immature language networks; and, c) aphasia symptoms related to literacy may extend into adulthood, even after functional communication has been established. Clinical implications as well as recommendations for research are discussed in light of evidence.

scholarly journals Comprehensive assessment of system performance in a full-scale wastewater treatment plant with an anaerobic/anoxic/aerobic membrane bioreactor combined with the ozonation process

2018 ◽  
Vol 78 (3) ◽  
pp. 690-698
Author(s):  
Dan Wang ◽  
Yihui Wu ◽  
Fang Guo ◽  
Zhiping Li ◽  
Guangxue Wu
Keyword(s):  
Environmental Impact ◽  
Nitrogen Removal ◽  
System Performance ◽  
Membrane Bioreactor ◽  
Linear Regression Analysis ◽  
Oxygen Demand ◽  
Economic Cost ◽  
Full Scale ◽  
Electricity Cost ◽  
Ozonation Process

Abstract The system performance, economic cost and environmental impact of a full-scale anaerobic/anoxic/aerobic/membrane bioreactor (3AMBR) combined with the ozonation process were evaluated. The 3AMBR/ozonation process removed biochemical oxygen demand (BOD), chemical oxygen demand (COD), suspended solids, NH4-N and total phosphorus efficiently, with removal percentages above 94%, while the total nitrogen removal percentage was only 70%. The multiple linear regression analysis showed that hydraulic retention time (HRT) had a significant effect on nitrogen removal. A low HRT benefited nitrogen removal. Ferrous sulfate dosage close to the optimal value and a high mixed liquid suspended solid could enhance the phosphorus removal. The electricity cost accounted for 88% of the total economic costs. Greenhouse gas (GHG) emissions from the BOD oxidation and endogenous decay accounted for more than 50% of total emissions. The second largest GHG emission source was electricity consumption, accounting for 41%. The key to reduce the eutrophication was to enhance nitrogen removal. The composite cost of the 3AMBR/ozonation process was 251 CNY/t CODeq removed, among which economic cost accounted for 82.5%, while environmental impact cost accounted for a small proportion.

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