Anaerobic Treatment by using an Upflow Anaerobic Sludge Blanket Reactor as a Pre-treatment system for Wastewaters from a Chocolate and Cake Industry
Mohamed Hussein Mohamed Hegazy;
Abstract
Wastewater from food processing is generally contains high concentration of organic matters, in suspended, colloidal, and soluble forms. In order to comply with the environmental legislation, different remedial actions have taken by those factories to reduce pollutant concentration before discharging their effluent to any public disposal system.
Wastewater •from food industries is commonly treated through biological processes. One of these processes is the anaerobic treatment. The upflow sludge blanket (UASB) reactor is a type of anaerobic treatment.
The research concerned with the treatment of a food processing wastewater. Pilot plant was established in HOSTESS factory to investigate the advantages and the disadvantages of using UASB reactor as a pre-treatment system. These were discussed by measuring the concentrations of various contaminants of the influent and effluent wastewater. These experiments were done at variable hydraulic retention time (HRT) accordingly surface loading rate, to find out the best and optimum operating criteria. This study also discusses the profile of various contaminants along the UASB reactor height.
The results obtained from experimental works shows that the removal efficiencies of COD, BODs and Oil & Grease at HRT of 24 hours were not high but it were acceptable, otherwise the removal efficiency of TSS was the best through this stage of the study. Removal efficiencies of all contaminants at HRTs of 18 and 12 hours were fairly satisfactory. Removal efficiencies of COD, BODs, TSS and O&G were 71, 74, 84 and 65% respectively.
The optimum value accepted for the removal efficiencies was at the stage of HRT of 12 hours. The removal efficiency of all contaminants decreased to reach the worst values at HRT of 6 hours due to the sludge washout. All the effluents of the UASB reactor are agreed with the Egyptian law No. 93/62 and its modifications at Decree No. 44/2000.
Wastewater •from food industries is commonly treated through biological processes. One of these processes is the anaerobic treatment. The upflow sludge blanket (UASB) reactor is a type of anaerobic treatment.
The research concerned with the treatment of a food processing wastewater. Pilot plant was established in HOSTESS factory to investigate the advantages and the disadvantages of using UASB reactor as a pre-treatment system. These were discussed by measuring the concentrations of various contaminants of the influent and effluent wastewater. These experiments were done at variable hydraulic retention time (HRT) accordingly surface loading rate, to find out the best and optimum operating criteria. This study also discusses the profile of various contaminants along the UASB reactor height.
The results obtained from experimental works shows that the removal efficiencies of COD, BODs and Oil & Grease at HRT of 24 hours were not high but it were acceptable, otherwise the removal efficiency of TSS was the best through this stage of the study. Removal efficiencies of all contaminants at HRTs of 18 and 12 hours were fairly satisfactory. Removal efficiencies of COD, BODs, TSS and O&G were 71, 74, 84 and 65% respectively.
The optimum value accepted for the removal efficiencies was at the stage of HRT of 12 hours. The removal efficiency of all contaminants decreased to reach the worst values at HRT of 6 hours due to the sludge washout. All the effluents of the UASB reactor are agreed with the Egyptian law No. 93/62 and its modifications at Decree No. 44/2000.
Other data
| Title | Anaerobic Treatment by using an Upflow Anaerobic Sludge Blanket Reactor as a Pre-treatment system for Wastewaters from a Chocolate and Cake Industry | Other Titles | المعالجة اللاهوائية بإستخدام مفاعل UASB كنظام معالجة أولية للمخلفات السائلة من صناعة الشيكولاتة والكعك | Authors | Mohamed Hussein Mohamed Hegazy | Issue Date | 2006 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| B14960.pdf | 997.2 kB | Adobe PDF | View/Open |
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