The effect of organic loading rate on the performance of UASB reactor treating slaughterhouse effluent

Torkian, Ayoob; Eqbali, A; Hashemian, S. J.

doi:10.1016/s0921-3449(03)00021-1

Cited by 125 publications

(62 citation statements)

References 18 publications

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“…The discharge of raw SWW to water bodies affects the quality of water particularly by causing a reduction of dissolved oxygen (DO), which may lead to the death of aquatic life [23]. Moreover, macronutrients, such as nitrogen and phosphorus, may cause eutrophication events.…”

Section: Environmental Impact and Health Effects Of Slaughterhouse Wamentioning

confidence: 99%

Slaughterhouse Wastewater: Treatment, Management and Resource Recovery

Bustillo-Lecompte¹,

Mehrvar²

2017

Physico-Chemical Wastewater Treatment and Resource Recovery

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The meat processing industry is one of the largest consumers of total freshwater used in the agricultural and livestock industry worldwide. Meat processing plants (MPPs) produce large amounts of slaughterhouse wastewater (SWW) because of the slaughtering process and cleaning of facilities. SWWs need significant treatment for a sustainable and safe discharge to the environment due to the high content of organics and nutrients. Therefore, the treatment and final disposal of SWW are a public health necessity. In this chapter, the regulatory frameworks relevant to the SWW management, environmental impacts, health effects, and treatment methods are discussed. Although physical, chemical, and biological treatment can be used for SWW degradation, each treatment process has different advantages and drawbacks depending on the SWW characteristics, best available technology, jurisdictions, and regulations. SWWs are typically assessed using bulk parameters because of the various pollutant loads derived from the type and the number of animals slaughtered that fluctuate amid the meat industry. Thus, an on-site treatment using combined processes would be the best option to treat and disinfect the slaughterhouse effluents to be safely discharged into receiving waters.

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Section: Environmental Impact and Health Effects Of Slaughterhouse Wamentioning

confidence: 99%

Slaughterhouse Wastewater: Treatment, Management and Resource Recovery

Bustillo-Lecompte¹,

Mehrvar²

2017

Physico-Chemical Wastewater Treatment and Resource Recovery

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“…From both the waste treatment and resource recovery perspectives, it is important to examine some of the important factors that govern the anaerobic bioconversion process. These include organic loading rate, biomass yield, substrate utilization rate, hydraulic retention time (HRT) and solids retention time (SRT), start-up time, microbiology, environmental factors, and reactor configuration (Khanal 2008;Kim et al 2006;Demirel and Yenigun 2004;Fang and Yu 2000;Sanchez et al 2000;El-Mashad et al 2004;Bouallagui et al 2004;Sanchez et al 2005;Torkian et al 2003;Raposo et al 2006). Anaerobic processes are characterized by high volumetric organic loading rates (VOLRs) and high-rate anaerobic reactors such as the upflow anaerobic sludge blanket (UASB), anaerobic filter, and fluidized bed reactors are capable of treating wastewater at VOLR of 10-45 kg COD m -3 day -1…”

Section: Process Considerations In Anaerobic Biotechnologymentioning

confidence: 99%

Effects of heavy metals as stress factors on anaerobic digestion processes and biogas production from biomass

Mudhoo

Kumar

2013

Int. J. Environ. Sci. Technol.

235

100

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Heavy metals affect the biochemical reactions that take place during anaerobic digestion processes of organic matter. In this review, the different effects observed in anaerobic digestion processes and during the production of biomethane and biohydrogen from several substrates contaminated with and/or inheriting heavy metals from the substrates themselves were discussed. It has been found that heavy metals exert important roles in biochemical reactions. Heavy metals like copper, nickel, zinc, cadmium, chromium and lead have been overwhelmingly reported to be inhibitory and under certain conditions toxic in biochemical reactions depending on their concentrations. Heavy metals like iron may also exhibit stimulatory effects, but these effects have been scantily observed. This review also concludes that the severity of heavy metal inhibition depends upon factors like metal concentration in a soluble, ionic form in the solution, type of metal species, and amount and distribution of biomass in the digester or chain of biochemical reactions which constitute the anaerobic digestion process. A majority of studies have demonstrated that the toxic effect of heavy metals like chromium, cadmium and nickel is attributable to a disruption of enzyme function and structure by binding of the metal ions with thiol and other groups on protein molecules or by replacing naturally occurring metals in enzyme prosthetic groups. This review has not found published data on the effects of heavy metals on the hydrolysis stage of anaerobic digestion process chemistry, and hence further studies are required to depict any changes.

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“…Usually these residual effluents are discharged into the municipal sewer system or directly into water bodies (streams, rivers, or lakes) [3,4], putting these ecosystems at risk. The lack of a treatment system in slaughterhouse facilities is primarily due to the lack of financial and technical resources.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Stability Factors in the Anaerobic Treatment of Slaughterhouse Wastewater

2011

J Bioremed Biodegrad

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The main environmental factors that assured the stability of an anaerobic batch reactor for the treatment of slaughterhouse wastewater were evaluated. The reactor was inoculated with anaerobic sludge from a distillery wastewater treatment plant. The volume of produced CH 4 was proportional to the quantity of organic matter removed matter (measured as Chemical Oxygen Demand, COD). The overall organic matter removal was 75%. The acetic, propionic and butyric acids concentration profiles were similar, where acetic acid had the highest concentration throughout the study period. The response time recorded between the acetogenic and methanogenic stages in this study was two days. The process showed an elevated acidogenic activity of 1.62 g of VFA/g of COD removed and a high Methane Production Rate (MPR) of about 450 ml of CH 4 /g of COD removed. The anaerobic treatment of slaughterhouse wastewater generated a buffer system which produced sufficient alkalinity to neutralize the effects of Volatile Fatty Acids (VFA) generated during the process. Evaluation of Stability Factors in the Anaerobic

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The effect of organic loading rate on the performance of UASB reactor treating slaughterhouse effluent

Cited by 125 publications

References 18 publications

Slaughterhouse Wastewater: Treatment, Management and Resource Recovery

Slaughterhouse Wastewater: Treatment, Management and Resource Recovery

Effects of heavy metals as stress factors on anaerobic digestion processes and biogas production from biomass

Evaluation of Stability Factors in the Anaerobic Treatment of Slaughterhouse Wastewater

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