Ultrasonication of wastewater sludge—Consequences on biodegradability and flowability

Pham, Thi Thanh Ha; Brar, Satinder Kaur; Tyagi, Rajeshwar Dayal; Surampalli, Rao Y.

doi:10.1016/j.jhazmat.2008.07.091

Cited by 71 publications

(37 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ultrasonication has been reported as a prospective method in augmenting sludge biodegradability for sludge stabilization in many studies (Pham et al, 2009). The propagation of ultrasonic wave produces cavitation of gas and vapour bubbles, leading to induced physicochemical effects such as: (1) the promotion of chemical reactions as a result of a locally high temperature and pressure; (2) extreme shear forces in the liquid, thereby mechanically attacking components; (3) the formation of highly reactive radicals (H and OH ), which can again facilitate chemical reactions to destroyorganic contaminants (Bourgrier et al, 2005;Dewil et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Fenton oxidation pre-treatment for B. thuringiensis – Based production of value added products from wastewater sludge

Pham

Brar

Tyagi

et al. 2010

Journal of Environmental Management

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Optimization of Fenton oxidation pre-treatment for B. thuringiensis – Based production of value added products from wastewater sludge

Pham

Brar

Tyagi

et al. 2010

Journal of Environmental Management

Self Cite

View full text Add to dashboard Cite

“…La producción de biogás se ve altamente beneficiada por la aplicación de pretratamientos en los lodos logrando una mayor estabilización, degradabilidad y en consecuencia, un incremento en la producción en comparación con la digestión anaeróbica clásica (Pham et al, 2009). De los pretratamientos, en el único que no produjo biogás fue el pretratamiento alcalino debido a las altas concentraciones de NaOH que inhibieron a las bacterias anaeróbicas (McCarty, 1964).…”

Section: Producción De Biogásunclassified

Efecto de cuatro pretratamientos en la digestion anaerobica y la remocion de nutrientes de efluentes, de un sistema de recirculacion acuicola

González-Hermoso

Segovia

2017

lajar

View full text Add to dashboard Cite

RESUMEN. Los sistemas de recirculación acuícola producen efluentes (fracción disuelta y fracción particulada) con altas concentraciones de nitrógeno y fósforo que son una fuente potencial de contaminación si no se tratan en forma adecuada. El tratamiento de los lodos y remoción de nutrientes por medio de la digestión anaeróbica se ha vuelto una alternativa viable para la reducción y la estabilización de los lodos provenientes de los sistemas de recirculación acuícola. El presente estudio determinó el efecto de cuatro diferentes pretratamientos (alcalino, mecánico, térmico y biológico) en la reducción de los lodos, la desnitrificación, la producción de biogás y la dinámica del nitrógeno y el fósforo proveniente de los efluentes de un cultivo de tilapia nilótica (Oreochromis niloticus, Linnaeus, 1758) en condiciones hiper-intensivas con experimentos mensuales durante un año, con duración de 15 días cada uno. Tras la aplicación de pretratamientos en los lodos de origen acuícola, se obtuvo un aumento en la liberación de nitrógeno amoniacal total con respecto al control, de igual forma se obtuvo una remoción de nitritos en todos los pretratamientos (˃90%), se incrementó la remoción de sólidos suspendidos totales, siendo mayor en los pretratamientos (˃20,3%) en comparación con el control (14,6%), así como también se incrementó la producción de biogás, siendo el pretratamiento biológico donde se obtuvo la mayor concentración (45,18 cm 3 L -1). Esto indica que la aplicación de pretratamientos en los efluentes acuícolas mejora los procesos de desnitrificación y digestión anaeróbica, pudiendo reducir los tiempos de retención hidráulica. Palabras clave: desnitrificación, digestión anaeróbica, pretratamientos, efluentes, sistema de recirculación. Effect of four different pretreatments in anaerobic digestion and nutrientremoval of effluents from a recirculating aquaculture system ABSTRACT. Intensive aquaculture recirculating systems produce effluents (dissolved and particulate solids) with concentrations of nitrogen and phosphorus, a potential source of pollution if they are not properly treated. The sludge and nutrient removal by anaerobic digestion has become an alternative for aquaculture sludge digestion and stabilization. In this study we determine the effect of four different pretreatments (alkaline, mechanical, thermal and biological) in sludge reduction and denitrification efficiency, biogas production and nitrogen and phosphorus dynamics from a hyper-intensive Nile tilapia (Oreochromis niloticus, Linnaeus, 1758) culture in 15 days experiments, one per month for one year. After application of pretreatments in aquaculture sludge, an increase in the release of total ammonia nitrogen was obtained with respect to the control, in the same way nitrate removal was obtained in all pretreatments (˃90%), The increase in total suspended solids removal was higher in pretreatment (˃20.3%) compared to control (14.6%), As well as the biogas production increase, being the biological pre-treatment where the highest concentration was ...

show abstract

“…The sonication was carried out at room temperature for 1 h (Pham et al 2009) while the probe was immersed 2 cm into 25 ml of sterilized ADS in a 50-ml falcon tube.…”

Section: Sludge Pretreatmentmentioning

confidence: 99%

Anaerobic digested sludge: a new supplementary nutrient source for ethanol production

Bashiri

Farhadian

Asadollahi

et al. 2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Effluent sludge from an anaerobic digester was used as a source of nitrogen, phosphate, sulfur, and other nutrients in the culture medium of ethanol production by the yeast Saccharomyces cerevisiae. Several pretreatments (mechanical, chemical, thermal, and thermo-chemical) were performed on the anaerobic digested sludge (ADS) to make the nutrients accessible to the yeast cells. Preliminary experiments revealed that S. cerevisiae is not able to assimilate the carbon content of the ADS. However, when glucose was added to the medium, ethanol production was observed. The yield of ethanol using untreated ADS was only 10 % of the theoretical yield, but alkaline pretreatment improved it up to 43 %. By separating the hydrolysate of alkaline-treated ADS from the suspended solids, the ethanol yield from the supernatant was further improved up to 65 % of theoretical yield. Alkaline-treated ADS exhibited competitive performance with the mixture of yeast extract and mineral salts in ethanol fermentation.

show abstract

Ultrasonication of wastewater sludge—Consequences on biodegradability and flowability

Cited by 71 publications

References 19 publications

Optimization of Fenton oxidation pre-treatment for B. thuringiensis – Based production of value added products from wastewater sludge

Optimization of Fenton oxidation pre-treatment for B. thuringiensis – Based production of value added products from wastewater sludge

Efecto de cuatro pretratamientos en la digestion anaerobica y la remocion de nutrientes de efluentes, de un sistema de recirculacion acuicola

Anaerobic digested sludge: a new supplementary nutrient source for ethanol production

Contact Info

Product

Resources

About