Effect of cycle length and phase fraction on biological nutrients removal in temporal and spatial phase separated process

The paper reviews the main numerical techniques that have been developed to carry out fully automated analysis of fringe patterns resulting from solid mechanics experiments. These include temporal and spatial phase shifting interferometry, temporal and spatial phase unwrapping, and calculation of strain fields from the phase maps. Systematic and random errors associated with the various procedures are also analysed. A unified treatment for both speckle and smooth-wavefront interferograms is presented, and the common features underlying many of the algorithms are emphasized. The paper is illustrated with applications that include ball impact (moiré photography), bending waves in orthotropic plates (double-pulsed dual-reference wave holography) and finite strains in propellant grains (fine grid technique).

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Full-scale production of VFAs from sewage sludge by anaerobic alkaline fermentation to improve biological nutrients removal in domestic wastewater

Bioresource Technology ◽

10.1016/j.biortech.2018.03.105 ◽

2018 ◽

Vol 260 ◽

pp. 105-114 ◽

Cited By ~ 70

Author(s):

He Liu ◽

Peng Han ◽

Hongbo Liu ◽

Guangjie Zhou ◽

Bo Fu ◽

...

Keyword(s):

Sewage Sludge ◽

Domestic Wastewater ◽

Full Scale ◽

Scale Production ◽

Nutrients Removal ◽

Biological Nutrients Removal

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Best available carbon sources to enhance the via-nitrite biological nutrients removal from supernatants of anaerobic co-digestion

Chemical Engineering Journal ◽

10.1016/j.cej.2012.10.094 ◽

2013 ◽

Vol 215-216 ◽

pp. 15-22 ◽

Cited By ~ 44

Author(s):

N. Frison ◽

S. Di Fabio ◽

C. Cavinato ◽

P. Pavan ◽

F. Fatone

Keyword(s):

Carbon Sources ◽

Nutrients Removal ◽

Available Carbon ◽

Biological Nutrients Removal

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Anaerobic co-digestion of sludge with other organic wastes and phosphorus reclamation in wastewater treatment plants for biological nutrients removal

Water Science & Technology ◽

10.2166/wst.2006.420 ◽

2006 ◽

Vol 53 (12) ◽

pp. 177-186 ◽

Cited By ~ 18

Author(s):

D. Bolzonella ◽

P. Pavan ◽

P. Battistoni ◽

F. Cecchi

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Wastewater Treatment Plants ◽

Biogas Production ◽

Organic Wastes ◽

Organic Loading Rate ◽

Waste Activated Sludge ◽

Nutrients Removal ◽

Nitrogen And Phosphorus ◽

Biological Nutrients Removal

This paper deals with the performances obtained in full scale anaerobic digesters co-digesting waste activated sludge from biological nutrients removal wastewater treatment plants, together with different types of organic wastes (solid and liquid). Results showed that the biogas production can be increased from 4,000 to some 18,000 m3 per month when treating some 3–5 tons per day of organic municipal solid waste together with waste activated sludge. On the other hand, the specific biogas production was improved, passing from 0.3 to 0.5 m3 per kgVS fed the reactor, when treating liquid effluents from cheese factories. The addition of the co-substrates gave minimal increases in the organic loading rate while the hydraulic retention time remained constant. Further, the potentiality of the struvite crystallisation process for treating anaerobic supernatant rich in nitrogen and phosphorus was studied: 80% removal of phosphorus was observed in all the tested conditions. In conclusion, a possible layout is proposed for designing or up-grading wastewater treatment plants for biological nutrients removal process.

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