Thermophilic process for protein recovery as an alternative to slaughterhouse wastewater treatment

Gariépy, Stéphane; Tyagi, Rajeshwar Dayal; Couillard, Denis; Tran, F.T.

doi:10.1016/0269-7483(89)90090-6

Cited by 22 publications

(7 citation statements)

References 8 publications

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“…Physical-chemical methods and aerobic processes have been used for the treatment of this type of wastewater [1,2] and they are not regarded as suitable treatment options because of odours, high energy requirements for aeration, large quantities of sludge production and flotation sludge caused by denitrifying bacteria. Anaerobic digestion is becoming the subject of current research of organic waste management for several reasons, it helps to convert a large part of degradable organic carbon to biogas to be used for energy, and it reduces pathogens and minimises odours [3].…”

Section: Introductionmentioning

confidence: 99%

Mesophilic and thermophilic anaerobic digestion of biologically pretreated abattoir wastewaters in an upflow anaerobic filter

Gannoun

Bouallagui

Okbi

et al. 2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Mesophilic and thermophilic anaerobic digestion of biologically pretreated abattoir wastewaters in an upflow anaerobic filter

Gannoun

Bouallagui

Okbi

et al. 2009

Journal of Hazardous Materials

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“…Flow rates and composition of the effluents vary significantly from one installation to another, with COD concentrations ranging from 1500 to 16,000 mg/1 and TSS concentrations ranging from 300 to 11,000 mg/1 (Ruiz et al, 1993). Physical-chemical methods and aerobic processes have been used for the treatment of this type of wastewater (Sáez & y Martínez, 1987;Couillard et al, 1989;Gariépy et al, 1989;Tritt & Schuchardt, 1992). Anaerobic processes have been proposed as a good alternative for the treatment of wastewaters with high or medium organic loads (Hickey et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Treatment of slaughterhouse wastewater in a UASB reactor and an anaerobic filter

Ruíz

Veiga

Santiago

et al. 1997

Bioresource Technology

127

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A study was performed to assess the feasibility of anaerobic treatment of slaughterhouse wastewaters in a UASB (Upflow Anaerobic Sludge Blanket) reactor and in an AF (Anaerobic Filler). Among the different streams generated, the slaughter line showed the highest organic content with an average COD of 8000 mg/1, of which 70% was proteins. The suspended solids content represented between 15 and 30% of the COD. Both reactors hada working volume of 21. They were operated at 37'C. The UASB reactor was run at OLR (Organic Loading Rates) of 1-6.5 kg COD/m 3 day. The COD removal was 90% for OLR up to 5 kg COD/m 3 /day and 60% for an OLR of 6.5 kg COD/m 3 day. For similar organic loading rates, the AF showed lower removal efficiencies and lower percentages of methanization. At higher OLR sludge, flotation occur-red and consequently the active biomass was washed out from the filler. The results indicated that anaerobic treatment systems are applicable to slaughterhouse wastewaters and that the UASB reactor shows a better performance, giving higher COD removal efficiencies than the AF.

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“…Several studies have described the common characteristics of slaughterhouse wastewater (Gariepy et al, 1989;Masse and Masse, 2000a;Seif and Moursy, 2001;Debik and Coskun, 2009;Cao, 2009;Cao and Mehrvar, 2011;Barrera, 2011;Barrera et al, 2011). These characteristics are summarized in Table 2.1, in which their common ranges and averages for slaughterhouse wastewater, including COD, TOC, BOD, TSS, TN, and pH among others are presented.…”

Section: Slaughterhouse Wastewater Characteristicsmentioning

confidence: 99%

Combined anaerobic-aerobic and UV/H2O2 processes for the treatment of synthetic slaughterhouse wastewater

Lecompte¹

2024

Preprint

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The biological treatment of a synthetic slaughterhouse wastewater (SSWW) was studied using an anaerobic baffled reactor (ABR) and an aerobic activated sludge (AS) at a laboratory scale, with total organic carbon (TOC) loading rates of 0.03–1.01 g/(L.day), total nitrogen (TN) loading rates of 0.01–0.19 g/(L.day), and a flow rate of 2.93 to 11.70 mL/min in continuous mode. Results revealed that combined anaerobic-aerobic processes had higher efficiency to treat SSWW than a single process. Up to 96.36% TOC, 80.53% TN, and 99.38% 5-day carbonaceous biochemical oxygen demand (CBOD5) removal from an influent concentration of 1,008.85 mgTOC/L, 419.77 mgTN/L, and 640 mgCBOD5/L at the hydraulic retention time (HRT) of 6.24 days and a flow rate of 3.75 mL/min was achieved. The UV/H2O2 process was studied to treat a secondary effluent of SSWW with TOC loadings of 64.88–349.84 mg/L. Up to 75.22% TOC and 84.38% CBOD5 removal were obtained for an influent concentration of 64.88 mgTOC/L at the HRT of 3 h with H2O2 concentration of 900 mg/L. An optimum molar ratio dosage of 13.87 mgH2O2/mgTOCin was also obtained. Combined anaerobic-aerobic and UV/H2O2 processes enhanced the biodegradability of the TOC, TN, and CBOD5 present in the SSWW. Up to 99.98% TOC, 82.84% TN, and 99.69% CBOD5 overall removals were obtained for an influent concentration of 1,004.88 mgTOC/L, 200.03 mgTN/L, and 640 mgCBOD5/L at the HRT of 4 days and a flow rate of 5.90 mL/min. A cost-effectiveness analysis (CEA) was performed for the optimum conditions for the SSWW treatment by optimizing total electricity cost and HRT, in which the combined anaerobic-aerobic and UV/H2O2 processes had an optimal TOC removal of 92.46% at an HRT of 41 h, a cost of $1.25/kg of TOC removed, and $11.60/m3 of treated SSWW. This process reaches a maximum TOC removal of 99% in 76.5 h with an estimated cost of $2.19/kg TOC removed and $21.65/m3 treated SSWW.

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Thermophilic process for protein recovery as an alternative to slaughterhouse wastewater treatment

Cited by 22 publications

References 8 publications

Mesophilic and thermophilic anaerobic digestion of biologically pretreated abattoir wastewaters in an upflow anaerobic filter

Mesophilic and thermophilic anaerobic digestion of biologically pretreated abattoir wastewaters in an upflow anaerobic filter

Treatment of slaughterhouse wastewater in a UASB reactor and an anaerobic filter

Combined anaerobic-aerobic and UV/H2O2 processes for the treatment of synthetic slaughterhouse wastewater

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