Performance of an expanded granular sludge bed (EGSB) reactor coupled with anoxic and aerobic bioreactors for treating poultry slaughterhouse wastewater

2016 ◽  
Vol 11 (1) ◽  
pp. 86-92 ◽  
Author(s):  
M. Basitere ◽  
Y. Williams ◽  
M. S. Sheldon ◽  
S. K. O. Ntwampe ◽  
D. De Jager ◽  
...  
Keyword(s):  
Suspended Solids ◽  
Low Cost ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
Cod Removal ◽  
Oil And Grease ◽  
Dissolved Air Flotation ◽  
Slaughterhouse Wastewater ◽  
Anaerobic Reactor ◽  
Aerobic Bioreactors

Generally, slaughterhouses have the largest consumption of fresh water and thus generate large quantities of high strength wastewater, which can be treated successfully using low cost biological treatment processes. In this study, the feasibility of using an expanded granular sludge bed (EGSB) anaerobic reactor coupled with anoxic and aerobic bioreactors for the treatment of poultry slaughterhouse wastewater was investigated. The poultry slaughterhouse was characterized by high chemical oxygen demand (COD), 2 to 6 g/L, with average biological oxygen demand of 2.4 g/L and average fats, oil and grease (FOG) being 0.55 g/L. A continuous EGSB anaerobic reactor was operated for 26 days at different hydraulic retention times (HRT), i.e. 7, 4, 3 days, and organic loading rates (OLR) of 0.5, 0.7 and 1.0 g COD/L.day, respectively, to assess the bioremediation of the poultry slaughterhouse wastewater. The average COD removal from the EGSB was 40%, 57% and 55% at the different OLR and HRT assessed. At high OLR of 1.0 g COD/L.day, the overall COD removal from the system (EGSB-anoxic/aerobic) averaged 65%. The system experienced periodical sludge washout during high FOG and suspended solids loading. It was concluded that the EGSB system requires a dissolved air flotation system, for FOG/suspended solid reduction, as the performance of the overall system was observed to deteriorate over time due to the presence of a high quantity of FOG including suspended solids.

scholarly journals Treatment of Poultry Slaughterhouse Wastewater (PSW) Using a Pretreatment Stage, an Expanded Granular Sludge Bed Reactor (EGSB), and a Membrane Bioreactor (MBR)

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 345
Author(s):  
Honeil Basile Meyo ◽  
Mahomet Njoya ◽  
Moses Basitere ◽  
Seteno Karabo Obed Ntwampe ◽  
Ephraim Kaskote
Keyword(s):  
Membrane Bioreactor ◽  
Low Cost ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
High Strength ◽  
Treated Wastewater ◽  
Organic Loading Rate ◽  
Oil And Grease ◽  
Slaughterhouse Wastewater ◽  
Alternative Means

This study presents the biological treatment of poultry slaughterhouse wastewater (PSW) using a combination of a biological pretreatment stage, an expanded granular sludge bed reactor (EGSB), and a membrane bioreactor (MBR) to treat PSW. This PSW treatment was geared toward reducing the concentration of contaminants present in the PSW to meet the City of Cape Town (CoCT) discharge standards and evaluate an alternative means of treating medium- to high-strength wastewater at low cost. The EGSB used in this study was operated under mesophilic conditions and at an organic loading rate (OLR) of 69 to 456 mg COD/L·h. The pretreatment stage of this laboratory-scale (lab-scale) plant played an important role in the pretreatment of the PSW, with removal percentages varying between 20% and 50% for total suspended solids (TSS), 20% and 70% for chemical oxygen demand (COD), and 50% and 83% for fats, oil, and grease (FOG). The EGSB further reduced the concentration of these contaminants to between 25% and 90% for TSS, 20% and 80% for COD, and 20% and >95% for FOG. The last stage of this process, i.e., the membrane bioreactor (MBR), contributed to a further decrease in the concentration of these contaminants with a peak removal performance of >95% for TSS and COD and 80% for the FOG. Overall, the system (pretreatment–EGSB–MBR) exceeded 97% for TSS and COD removal and 97.5% for FOG removal. These results culminated in a product (treated wastewater) meeting the discharge standards.

scholarly journals Treatment of poultry slaughterhouse wastewater using a static granular bed reactor (SGBR) coupled with ultrafiltration (UF) membrane system

2017 ◽  
Vol 76 (1) ◽  
pp. 106-114 ◽  
Author(s):  
M. Basitere ◽  
Z. Rinquest ◽  
M. Njoya ◽  
M. S. Sheldon ◽  
S. K. O. Ntwampe
Keyword(s):  
Low Cost ◽  
Oxygen Demand ◽  
High Strength ◽  
Membrane System ◽  
Post Treatment ◽  
Organic Loading Rate ◽  
Granular Bed ◽  
Oil And Grease ◽  
Slaughterhouse Wastewater ◽  
Static Granular Bed Reactor

The South African poultry industry has grown exponentially in recent years due to an increased demand for their products. As a result, poultry plants consume large volumes of high quality water to ensure that hygienically safe poultry products are produced. Furthermore, poultry industries generate high strength wastewater, which can be treated successfully at low cost using anaerobic digesters. In this study, the performance of a bench-scale mesophilic static granular bed reactor (SGBR) containing fully anaerobic granules coupled with an ultrafiltration (UF) membrane system, as a post-treatment system, was investigated. The poultry slaughterhouse wastewater was characterized by a chemical oxygen demand (COD) range between 1,223 and 9,695mg/L, average biological oxygen demand of 2,375mg/L and average fats, oil and grease (FOG) of 554mg/L. The SGBR anaerobic reactor was operated for 9 weeks at different hydraulic retention times (HRTs), i.e. 55 and 40 h, with an average organic loading rate (OLR) of 1.01 and 3.14g COD/L.day. The SGBR results showed an average COD, total suspended solids (TSS) and FOG removal of 93%, 95% and 90% respectively, for both OLR. The UF post-treatment results showed an average of COD, TSS and FOG removal of 64%, 88% and 48%, respectively. The overall COD, TSS and FOG removal of the system (SGBR and UF membrane) was 98%, 99.8%, and 92.4%, respectively. The results of the combined SGBR reactor coupled with the UF membrane showed a potential to ensure environmentally friendly treatment of poultry slaughterhouse wastewater.

scholarly journals Poultry Slaughterhouse Wastewater Remediation Using a Bio-Delipidation Pre-Treatment Unit Coupled with an Expanded Granular Sludge Bed Reactor

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1938
Author(s):  
Cebisa Thabo Mdladla ◽  
Phumeza Akhona Dyosile ◽  
Mahomet Njoya ◽  
Moses Basitere ◽  
Seteno Karabo Obed Ntwampe ◽  
...  
Keyword(s):  
Oxygen Demand ◽  
Poor Performance ◽  
Granular Sludge ◽  
Wastewater Remediation ◽  
Oil And Grease ◽  
Treatment Unit ◽  
Slaughterhouse Wastewater ◽  
Three Phase ◽  
Pre Treatment ◽  
Phase Separator

The treatment of poultry slaughterhouse wastewater (PSW) with an Expanded Granular Sludge-Bed Bioreactor (EGSB) is hindered by the accumulation and washout of sludge, and difficulties associated with the operation of the three-phase separator and the determination of the optimum up-flow velocity for sludge-bed fluidization. This results in a poor reactor functionality, and thus a poor performance due to fats, oil and grease (FOG) in the PSW being treated. Hydrolyzing the FOG content with a bio-delipidation, enzyme-based agent in a pre-treatment unit would significantly improve the effectiveness of the EGSB. In this study, PSW was pre-treated for 48 h with a biological mixture containing bioflocculants and bio-delipidation constituents. The pre-treated PSW was further treated in an EGSB. The PSW FOG, total chemical oxygen demand (tCOD) and total suspended solids (TSS) content were determined to assess the effectiveness of the pre-treatment process as well as to observe the remedial action of the combined pre-treatment-EGSB system. An increased treatment efficacy was noted for the combined PSW treatment system, whereby the COD, FOG and TSS removal averaged 76%, 88% and 87%, respectively. The process developed is intended for micro, small and medium poultry slaughterhouses.

scholarly journals Bio-Delipidation of Dissolved Air Flotation Pre-Treated Poultry Slaughterhouse Wastewater

2018 ◽  
Author(s):  
Siyasanga Mbulawa ◽  
Seteno Karabo Obed Ntwampe ◽  
Moses Basitere ◽  
Yolanda Mpentshu ◽  
Cynthia Dlangamandla ◽  
...  
Keyword(s):  
Bacillus Cereus ◽  
Oxygen Demand ◽  
Industrial Applications ◽  
Quality Parameters ◽  
Bacterial Strains ◽  
Oil And Grease ◽  
Dissolved Air Flotation ◽  
Slaughterhouse Wastewater ◽  
Air Flotation ◽  
Dissolved Air

Delipidation is a method of defatting that is generally associated with the removal of residual lipids or lipid groups from matrices in which they are present in minute quantities. The bio-delipidation of protein-rich poultry slaughterhouse wastewater (PSW) pre-treated with a dissolved air flotation (DAF) system was developed using microbial lipases from bacterial strains isolated from the PSW. The efficacy of the bio-delipidation system was quantitatively characterised by comparing the quality parameters i.e., fats, oil and grease (FOGs), turbidity, total suspended solutes (TSS), total chemical oxygen demand (tCOD) and protein concentration of the DAF pre-treated PSW and bio-lipidized samples. As hypothesised, the bio-delipidation system was able to effectively reduce the levels of these quality parameters when crude lipases of Bacillus cereus AB1 (BF3) and Bacillus cereus CC-1 (B30) strains were used. Strain-dependent quality characteristics were also observed in bio-delipidized samples. The study successfully managed to complement physical reduction techniques (DAF) with biological strategies (bio-delipidation) for improved PSW quality, with potential industrial applications.

scholarly journals Treatment of poultry slaughterhouse wastewater using electrocoagulation: a review

2021 ◽  
Author(s):  
Philadelphia Vutivi Ngobeni ◽  
Moses Basitere ◽  
Andile Thole
Keyword(s):  
Low Cost ◽  
Oxygen Demand ◽  
Cost Effective ◽  
High Concentration ◽  
Oil And Grease ◽  
Slaughterhouse Wastewater ◽  
Cost System ◽  
Secondary Pollution ◽  
Coagulation And Flocculation ◽  
Potential Applications

Abstract Poultry slaughterhouses are generally large consumers of fresh water, which is exhausted as wastewater characterized by a high concentration of biological oxygen demand (BOD), chemical oxygen demand COD, and fats, oil, and grease (FOG). Cost-effective methods are required for the treatment of poultry slaughterhouse wastewater, with the aim of attaining a high quality effluent that can be reused in industrial processes to promote sustainability. As compared to conventional treatment methods, electrocoagulation is an efficient and low-cost system. Electrocoagulation is environmentally friendly, treating wastewater without the need of chemicals, thus limiting secondary pollution. The metal anodes initiate electrochemical reactions for coagulation and flocculation. Its distinct advantages include compact installation, and simple operation. This paper offers a comprehensive review of recent literature that has been dedicated to utilizing electrocoagulation for poultry slaughterhouse wastewater treatment. This paper also examines aspects such as theory, potential applications, current applications, as well as economical assessment of the technique.

scholarly journals Performance Evaluation of a Biological Pre-Treatment Coupled with the Down-Flow Expanded Granular Bed Reactor (DEGBR) for Treatment of Poultry Slaughterhouse Wastewater

2021 ◽  
Vol 11 (14) ◽  
pp. 6536
Author(s):  
Derrick Njabuliso Dlamini ◽  
Moses Basitere ◽  
Mahomet Njoya ◽  
Seteno Karabo Obed Ntwampe ◽  
Ephraim Kaskote
Keyword(s):  
Suspended Solids ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Integrated System ◽  
Granular Bed ◽  
Oil And Grease ◽  
Slaughterhouse Wastewater ◽  
Stable Performance ◽  
Pre Treatment ◽  
High Concentrations

Poultry slaughterhouse wastewater contains high concentrations of chemical oxygen demand (COD), total suspended solids (TSSs), fats, oil and grease (FOG), proteins and carbohydrates. It is important that the wastewater is treated to acceptable environmental discharge standards. In this study, the poultry slaughterhouse wastewater (PSW) was treated using two-stage processes consisting of a biological pre-treatment using a biodegrading agent (Eco-flushTM) coupled with a down-flow expanded granular bed reactor (DEGBR). The results showed that the biological pre-treatment was observed to be highly effective for removal of FOG, COD and TSS with a removal efficiency of 80 ± 6.3%, 38 ± 8.4% and 56 ± 7.2%, respectively. The DEGBR showed a stable performance in terms FOG, COD and, TSS removal, with average removal efficiencies of 89 ± 2.8%, 87 ± 9.5%, and 94 ± 3.7%, respectively. The overall removal rate performance of the integrated system of pre-treatment and DEGBR in terms FOG, COD and TSS, was 97 ± 0.8%, 92 ± 6.3% and 97 ± 1.2%. Furthermore, the average volatile fatty acid/alkalinity (VFA/Alkalinity) ratio of 0.2 was reported, which indicated that the DEGBR was stable throughout the operation.

scholarly journals Treatment of Dairy Wastewaters: Evaluating Microbial Fuel Cell Tools and Mechanism

2020 ◽  
Author(s):  
Aman Dongre ◽  
Monika Sogani ◽  
Kumar Sonu ◽  
Zainab Syed ◽  
Gopesh Sharma
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Suspended Solids ◽  
Electrode Materials ◽  
Low Cost ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Operational Parameters ◽  
Oil And Grease

Pollution caused by chemical and dairy effluent is a major concern worldwide. Dairy wastewaters are the most challenging to treat because of the presence of various pollutants in them. The characteristics of effluent like temperature, color, pH, Dissolved Oxygen, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), dissolved solids, suspended solids, chloride, sulfate, oil, and grease depend solely on the volume of milk processed and the form of finished produce. It is difficult to select an efficient wastewater treatment method for the dairy wastewaters because of their selective nature in terms of pH, flow rate, volume, and suspended solids. Thus there exists a clear need for a technology or a combination of technologies that would efficiently treat the dairy wastewaters. This chapter explains the energy-generating microbial fuel cell or MFC technologies for dairy wastewaters treatment having different designs of MFCs, mechanism of action, different electrode materials, their surface modification, operational parameters, applications and outcomes delivered through the technology in reducing the COD, BOD, suspended solids and other residues present in the wastewaters. The chapter also elaborates on the availability of various natural low-cost anode materials which can be derived from agricultural wastes. The current chapter elaborates on MFC technology and its tools used for dairy wastewater treatment, providing useful insight for integrating it with existing conventional wastewater treatment methods to achieve the degradation of various dairy pollutants including emerging micropollutants.

scholarly journals Effluent conditioning of biodiesel production for biological treatment using clay as a separation coadjutant

2020 ◽  
Vol 16 (4) ◽  
Author(s):  
Lívia Caroline Correia ◽  
Romário Ribeiro Silva ◽  
Fernanda Rocha Morais França ◽  
Gabriel Francisco Da Silva ◽  
Diego F. Coêlho ◽  
...  
Keyword(s):  
Organic Matter ◽  
Low Cost ◽  
Oxygen Demand ◽  
Biodiesel Production ◽  
Organic Load ◽  
Attractive Alternative ◽  
Oil And Grease ◽  
Dissolved Air Flotation ◽  
Treatment Processes ◽  
Wastewater Samples

Biodiesel is a renewable, non-toxic and sustainable biofuel, considered to be the main candidate for a fossil fuel alternative in many countries. However, its manufacturing process results in about 0.2 to 3 L of effluent per litre of biodiesel produced. In addition to an inherently high organic load, its composition includes by-products, traces of unreacted chemicals and catalysts, which inhibit microorganism growth and prevent its direct treatment by tertiary methods. In this context, this work aims to evaluate the combination of the coagulation-flocculation technique with dissolved air flotation (DAF). Real wastewater samples were obtained by synthesising biodiesel from soybean oil in-loco and performing the required washing procedures. The highest turbidity reduction efficiency (92.03%) was obtained using 1200  of clay. By using response surface methodology, it was possible to analyse the effect of the chosen experimental factors and show that the best results (81.28%, 58.95% and 89.34% for turbidity, oil and grease and chemical oxygen demand  - respectively) were obtained using 925  of clay and 1000  of coagulant. Ultimately, clay proved to be an efficient coadjutant in the removal of organic matter, oils, grease, suspended solids and soluble organic matter from the biodiesel wastewater. Moreover, its low cost over traditional flocculants makes it an attractive alternative to industrial wastewater treatment processes.

scholarly journals Treatment of industrial mineral oil wastewater – effects of coagulant type and dosage

2017 ◽  
Vol 12 (1) ◽  
pp. 139-145 ◽  
Author(s):  
E. Kweinor Tetteh ◽  
S. Rathilal ◽  
K. Robinson
Keyword(s):  
Oxygen Demand ◽  
Mineral Oil ◽  
Quality Parameters ◽  
Oil Refinery ◽  
Oil And Grease ◽  
Water And Wastewater Treatment ◽  
Dissolved Air Flotation ◽  
Jar Test ◽  
Industrial Mineral ◽  
Oil Wastewater

The use of coagulants is essential in the diverse disciplines of conventional water and wastewater treatment. This work aimed to select an economic and effective coagulant, to minimize the cost of treatment and the oil droplet content of the water, thus enhancing the efficiency of a local South African oil refinery effluent plant recovering water and oil for reuse by treating the industrial mineral oil wastewater. A standard dissolved air flotation jar test preceded evaluation of four coagulants, viz. aluminum sulfate (Alum), aluminum chloride, ferric sulfate and ferric chloride. Chemical oxygen demand, soap oil and grease, total suspended solids and turbidity were determined as water quality parameters to check coagulant efficiency. Removal of over 70% was achieved for each parameter. The results obtained at pH 5 and coagulant dose of 50 mg/L showed that alum was the best pretreatment coagulant for destabilizing and minimizing oil droplets in water, due to its trivalent cationic nature. It was also economically viable.

Anaerobic Treatment of Slaughterhouse Wastewater in an Expanded Granular Sludge Bed (EGSB) Reactor

1999 ◽  
Vol 40 (8) ◽  
pp. 99-106 ◽  
Author(s):  
L. A. Núñez ◽  
B. Martínez
Keyword(s):  
Suspended Solids ◽  
Hydraulic Retention Time ◽  
Granular Sludge ◽  
Anaerobic Treatment ◽  
Slaughterhouse Wastewater ◽  
Methanogenic Activity ◽  
Loading Rates ◽  
Feasible Option ◽  
One Year ◽  
Sludge Activity

The performance of an Expanded Granular Sludge Bed (EGSB) reactor for treating slaughterhouse wastewater under mesophilic conditions (35°C), was investigated. The reactor was inoculated with granular sludge from an anaerobic reactor of a brewery factory. The averaged COD removal percentages were 67% for total organic loading rates (BV.TCOD) up to 15 kg COD m−3 d−1 and a hydraulic retention time (HRT) of 5 h. Total suspended solids (TSS) were 90% removed for total solids loads of 6 kg TSS m−3 d−1. Fats were 85% removed and no accumulation of fats on the sludge was observed. The specific methanogenic activity of the sludge, after 140 days, was about three times higher than the sludge inoculated into the reactor. The sludge activity did not significantly change after one year of work. These findings indicate that the anaerobic treatment of slaughterhouse wastewater in an EGSB system appears to be a feasible option.

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