Feasibility studies on the treatment of dairy wastewaters with upflow anaerobic sludge blanket reactors

Ramasamy, E. V.; Gajalakshmi, S.; Sanjeevi, R.; Jithesh, M.N.; Abbasi, S. A.

doi:10.1016/j.biortech.2003.11.001

Cited by 117 publications

(49 citation statements)

References 9 publications

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“…Also, a large-scale SBR (22 m 3 ) was used to treat the treated dairy wastewater from an anaerobic filter, at OLR of 0.5-1.5 gCOD L À1 d À1 , achieving sCOD concentration of 20-200 mg L À1 in the effluent (Garrido et al, 2001). High COD removal is also possible at high OLR, as reported by Ramasamy et al (2004) with a UASB operated at an OLR of 2.4-13.5 gCOD L À1 d À1 and a HRT varying between 3 and 12 h for a 96% COD removal. Hence, high COD removal and low residual COD concentration is attainable at psychrophilic conditions, although the HRT has to be increased compared to mesophilic conditions and/or high rate systems in order to obtain similar performance.…”

Section: Digester Performance During Phasementioning

confidence: 87%

The treatment of cheese whey wastewater by sequential anaerobic and aerobic steps in a single digester at pilot scale

Frigon

Bretón

Bruneau

et al. 2009

Bioresource Technology

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The treatment of cheese whey wastewater by sequential anaerobic and aerobic steps in a single digester at pilot scale Frigon, J.-C.; Breton, J.; Bruneau, T.; Moletta, R.; Guiot, S. R. The treatment of reconstituted whey wastewater was performed in a 400 L digester at 20°C, with an anaerobic digestion step, followed by a step of aerobic treatment at low oxygen concentration in the same digester. In a first set of 48 cycles, total cycle time (T C ) of 2, 3 and 4 days were tested at varying organic loading rates (OLR). The COD removal reached 89 ± 4, 97 ± 3 and 98 ± 2% at T C of 2, 3 and 4 days and OLR of 0.56, 1.04 and 0.78 gCOD L À1 d À1 , respectively. The activity of the biomass decreased for the methanogenic population, while increasing by 400% for the acidogens, demonstrating a displacement in the predominant trophic group in the biomass bed. A second set of 16 cycles was performed with higher soluble oxygen concentration in the bulk liquid (0.5 mg L À1 ) during the aerobic treatment at a T C of 2 days and an OLR of 1.55 gCOD L À1 d À1 , with a soluble COD removal of 88 ± 3%. The biomass specific activities showed a compartmentalization of the trophic group with methanogenic activity maintained in the biomass bed and a high acidogenic activity in the suspended flocs.Crown

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Section: Digester Performance During Phasementioning

confidence: 87%

The treatment of cheese whey wastewater by sequential anaerobic and aerobic steps in a single digester at pilot scale

Frigon

Bretón

Bruneau

et al. 2009

Bioresource Technology

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“…However, according to Van Haandel (2006), a very long HRT may adversely affect granulation process sludge in UASB bioreactor, while a very short HRT can lead sludge to drift out of its biomass reactor. UASB technology for wastewater treatment has been widely studied with a variety of performance parameters ( Van Haandel, 2006;Ramasamy et al, 2004;Supriyanto et al, 2010)). Most of the study were prioritized on the removal of COD, BOD5 and TSS; while not much has been done for the production of biogas using UASB.…”

Section: Uasb (Upflow Sludge Blanket Anaerobic)mentioning

confidence: 99%

Biogas Production and Removal COD – BOD and TSS from Wastewater Industrial Alcohol (Vinasse) by Modified UASB Bioreactor

Utami

Redjeki

Astuti

2016

MATEC Web of Conferences

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Biogas production and decreased organic loading of vinasse using a modified UASB bioreactor has been done successfully. Vinasse is waste from the ethanol industry which contains COD: 9.360 mg / L , BOD : 4.013 mg/L, and TSS: 317.5 mg/L. The purpose of this research was to study the performance of bioreactors Upflow Anaerobic Sludge Blanket (UASB) to decompose the vinasse into biogas or methane. UASB operating principle is to distribute wastewater in the bioreactor to flow upward through the sludge blanket by setting the hidrolic retention time (HRT). Four UASB bioreactor columns were used in this experiment wherein each with a capacity of 50 L in volume; 23 cm inside diameter, and 120 cm. The variations of hydraulic capacity followed the variations of HRT in the range of 72-36 hours. Modifications were carried out on the top of column UASB with the aim of preventing gas losses and increasing the flowrate of gas out from the top of the column. The results showed that HRT increased from 36 h to 72 h followed by an increase in COD removal efficiency of 55.64% to 66.81%; BOD5 from 67.85% to 74.58%; and TSS from 66.69% to 84.19%. The maximum volume of biogas produced was in the range of 5.826 L / day (42.89% methane) to 7.930 L / day (methane 58.06%).

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“…Although the correct action upon the process and the implementation of good management practices may decrease substantially the amount of milk losses to the effluent, there is a lower limit of about 2.5 kg of milk lost per 1,000 kg of processed milk (7). Because of high water consumption, it is estimated that the volume of the discharged effluents is around 2.5 times the volume of the processed milk (3). Taking into consideration that the volume of world milk production in 2005 was about 630 × 10 6 mton ( Fig.…”

Section: Treatment In Lagoonsmentioning

confidence: 99%

Anaerobic Treatment of Milk Processing Wastewater

Nadais

Capela

Arroja

et al. 2010

Environmental Bioengineering

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Anaerobic processes are widely used for the treatment of milk and dairy effluents. This technology has been subjected to significant development and real-scale application in the last few decades and offers highly favorable perspectives to accomplish a complete biodegradation of the components present in milk processing wastewaters such as sugars, proteins, and fats. Nowadays, anaerobic systems for the treatment of milk wastes can be operated successfully constituting an important contribution for the preservation of environmental quality.

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Feasibility studies on the treatment of dairy wastewaters with upflow anaerobic sludge blanket reactors

Cited by 117 publications

References 9 publications

The treatment of cheese whey wastewater by sequential anaerobic and aerobic steps in a single digester at pilot scale

The treatment of cheese whey wastewater by sequential anaerobic and aerobic steps in a single digester at pilot scale

Biogas Production and Removal COD – BOD and TSS from Wastewater Industrial Alcohol (Vinasse) by Modified UASB Bioreactor

Anaerobic Treatment of Milk Processing Wastewater

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