Performance of full-scale coagulation-flocculation/DAF as a pre-treatment technology for biodegradability enhancement of high strength wastepaper-recycling wastewater

2018 ◽  
Vol 25 (34) ◽  
pp. 33978-33991 ◽  
Author(s):  
Sepideh Ansari ◽  
Javad Alavi ◽  
Zaher Mundher Yaseen
Keyword(s):  
High Strength ◽  
Full Scale ◽  
Treatment Technology ◽  
Pre Treatment

Review of the performance of full-scale MBR plants: design, operation and on-site experimental data

2010 ◽  
Vol 5 (2) ◽  
Author(s):  
S.K. Pattanayak ◽  
S. Chang ◽  
M. Theodoulou ◽  
V. Mahendraker
Keyword(s):  
Full Scale ◽  
Design Parameters ◽  
Plant Design ◽  
Treatment Technology ◽  
Wide Range ◽  
Pre Treatment ◽  
Long Term Performance ◽  
Term Performance ◽  
Removal System

The membrane bioreactor (MBR) process has become an effective alternative wastewater treatment technology that produces effluent with excellent quality. Globally, a wide range of municipal and industrial MBR plants are in operation, varying both in size and complexity. The objective of this investigation was to develop a better understanding of the long term performance of MBR plants. To achieve this objective, eight full-scale municipal MBR plants were examined. The methodology included a review of plant design parameters, pre-treatment system, biological operation, membrane operation, disinfection system and nutrient removal system. In addition, on-site tests were done on permeate, final effluent and mixed liquor to understand MBR performance.

Swine manure biogas production improvement using pre-treatment strategies: lab-scale studies and full-scale application

2021 ◽  
pp. 100716
Author(s):  
Deisi Cristina Tápparo ◽  
Daniela Cândido ◽  
Ricardo Luis Radis Steinmetz ◽  
Christian Etzkorn ◽  
André Cestonaro do Amaral ◽  
...  
Keyword(s):  
Biogas Production ◽  
Swine Manure ◽  
Treatment Strategies ◽  
Full Scale ◽  
Production Improvement ◽  
Pre Treatment

Optimized pre-treatment of high strength food waste digestate by high content aluminum-nanocluster based magnetic coagulation

2021 ◽  
Vol 104 ◽  
pp. 430-443
Author(s):  
Tharindu Ritigala ◽  
Hailu Demissie ◽  
Yanlin Chen ◽  
Jiaxi Zheng ◽  
Libing Zheng ◽  
...  
Keyword(s):  
Food Waste ◽  
High Strength ◽  
Pre Treatment

Surface Interface Treatment of Conveyer Belt

2011 ◽  
Vol 332-334 ◽  
pp. 295-298
Author(s):  
Jia Huang Hu ◽  
Chiu Chun Lai ◽  
Wen Hao Hsing ◽  
Yi Kui Wang
Keyword(s):  
Adhesion Strength ◽  
Oxygen Plasma ◽  
High Strength ◽  
Far Infrared ◽  
Conveyor Belt ◽  
Polyester Fabric ◽  
Rubber Layer ◽  
Pet Fabric ◽  
Pre Treatment ◽  
Interface Treatment

This Research Is to Study the High Strength Polyester Fabric Pre-treatment by Oxygen Plasma and Far-infrared, in the Rfl Chemical Solid Composition and Methylenediphenylisocyanate Concentration of 4% for Adding. Analysis Adhesion Strength between Fabric to Fabric and Fabric to Rubber of the Conveyor Belt, and the Effect of Pet Fabric Mechanical Properties. from the Result, the Best Treatment Condition Is Oxygen Plasma Treated 1min 120w and Add 4% Methylenediphenylisocyanate(mdi). in the Adhesion Strength of Fabric and Fabric Layer Compared with the Untreated Has Raised up to 21.5kgf (25.0%), and Fabric and Rubber Layer Has Raised up to 23.7kgf (55.9%). Heating 20 Seconds, after Stop 10 Seconds and then Heat 20 Seconds and Add 4% Methylenediphenylisocyanate(mdi) Fabric-fabric Adhesion Strength Is 13.4 Kgf, Fabric-rubber Adhesion Strength Is 15.8 Kgf, Fabric-fabric and Fabric-rubber Adhesion Strength that Improve 24.1%, 43.6%.

scholarly journals Performance of Full-Scale Thermophilic Membrane Bioreactor and Assessment of the Effect of the Aqueous Residue on Mesophilic Biological Activity

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1754
Author(s):  
Maria Cristina Collivignarelli ◽  
Marco Carnevale Miino ◽  
Francesca Maria Caccamo ◽  
Marco Baldi ◽  
Alessandro Abbà
Keyword(s):  
Uptake Rate ◽  
High Strength ◽  
Acute Effect ◽  
Full Scale ◽  
A Value ◽  
Nitrogen Uptake Rate ◽  
High Concentrations ◽  
Input Load ◽  
Positive Effect ◽  
Sludge Production

To date, the management of high-strength wastewater represents a serious problem. This work aims to evaluate the performance on chemical pollutants and on sludge production of one of the two full-scale thermophilic membrane bioreactors (ThMBRs) currently operational in Italy, based on monitoring data of the last two and a half years. Removal yields on COD, N-NOx, non-ionic and anionic surfactants (TAS and MBAS), increased with the input load up to 81.9%, 97.6%, 94.7%, and 98.4%, respectively. In the period of stability, a very low value of sludge production (0.052 kgVS kgCOD−1) was observed. Oxygen uptake rate (OUR) tests allowed us to exclude the possibility that mesophilic biomass generally exhibited any acute inhibition following contact with the aqueous residues (ARs), except for substrates that presented high concentrations of perfluoro alkyl substances (PFAS), cyanides and chlorides. In one case, nitrifying activity was partially inhibited by high chlorides and PFAS concentration, while in another the substrate determined a positive effect, stimulating the phenomenon of nitrification. Nitrogen uptake rate (NUR) tests highlighted the feasibility of reusing the organic carbon contained in the substrate as a source in denitrification, obtaining a value comparable with that obtained using the reference solution with methanol. Therefore, respirometric tests proved to be a valid tool to assess the acute effect of AR of ThMBR on the activity of mesophilic biomass in the case of recirculation.

Use of DNVGL-RP-C203 for Determining the Fatigue Capacity of Connectors

2021 ◽  
Author(s):  
Anthony Muff ◽  
Anders Wormsen ◽  
Torfinn Hørte ◽  
Arne Fjeldstad ◽  
Per Osen ◽  
...  
Keyword(s):  
Finite Element ◽  
Fatigue Testing ◽  
Experimental Testing ◽  
High Strength ◽  
Element Model ◽  
Fatigue Analysis ◽  
Full Scale ◽  
The Finite Element Model

Abstract Guidance for determining a S-N based fatigue capacity (safe life design) for preloaded connectors is included in Section 5.4 of the 2019 edition of DNVGL-RP-C203 (C203-2019). This section includes guidance on the finite element model representation, finite element based fatigue analysis and determination of the connector design fatigue capacity by use of one of the following methods: Method 1 by FEA based fatigue analysis, Method 2 by FEA based fatigue analysis and experimental testing and Method 3 by full-scale connector fatigue testing. The FEA based fatigue analysis makes use of Appendix D.2 in C203-2019 (“S-N curves for high strength steel applications for subsea”). Practical use of Section 5.4 is illustrated with a case study of a fatigue tested wellhead profile connector segment test. Further developments of Section 5.4 of C203-2019 are proposed. This included acceptance criteria for use of a segment test to validate the FEA based fatigue analysis of a full-scale preloaded connector.

Dynamic Behavior of Intermittent Buried Filters

1993 ◽  
Vol 28 (10) ◽  
pp. 99-107 ◽  
Author(s):  
M. Boiler ◽  
A. Schwager ◽  
J. Eugster ◽  
V. Mottier
Keyword(s):  
Filter Material ◽  
Full Scale ◽  
Septic Tank ◽  
Retention Capacity ◽  
Unsaturated Media ◽  
Coarse Filter ◽  
High Ammonia ◽  
The Media ◽  
Pre Treatment ◽  
Optimized Conditions

Buried filters were investigated experimentally in pilot and full scale as typical on-site treatment for small wastewater flows. The filters were operated by intermittent flushing which causes the water and the pollutant transport through the unsaturated media to be of a highly dynamic nature. Water transport and tracer studies at low and high hydraulic flush loads revealed frequent flushing at low loads to be superior to less frequent flushing at high loads for treatment of the same daily amount of wastewater. These findings were confirmed in a full scale plant through monitoring of the dynamic washout of unoxidized matter in terms of COD and NH4+ after application of different hydraulic loads. The moisture retention capacity of the filter media correlated to the grain size distribution was found to be an important parameter. COD-removal and nitrification rates depend strongly on the oxygen supply to the media. In general, the oxygen diffusion into the media and the air exchange, induced by intermittent flushing, are sufficient. However, when applying relatively large hydraulic loads and coarse filter grains, especially in the range above 1 mm, buried filters tend to larger breakthroughs of unoxidized matter due to short retention times and instantaneous lack of oxygen. Experiments on average treatment performance were carried out and showed that under optimized conditions even wastewaters containing relatively high ammonia contents (150 gNH4+-N/m3) can be fully nitrified when limestone type filter material is used. Full scale operation revealed further that careful pre-treatment (e.g. septic tank) for the removal of most of the suspended solids is necessary to guarantee safe operation.

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