Architectural Engineering and Planning ServicesWastewater treatment plant extension in Eggenstein LeopoldshafenDescription The expansion of the Eggenstein Leopoldshafen sewage treatment plant is to be planned during ongoing operation The always secure operation with constant compliance with the statutory expiry values has top priority The cost effectiveness of the planning must be demonstrated A study Annex 2 of the tender documents serves as an orientation It does not replace the independent planning and calculation of the expansion across all service phases When converting to anaerobic wastewater treatment the following parts of the plant must be rebuilt 1 primary clarifier 2 clarifier 3 machine pre thickening 4 high performance fermenter digestion 5 gas storage 6 block type thermal power station 7 gas torch 8 gas cleaning 9 Adjustment of the existing secondary clarifier and connection of the new secondary clarifier 10 Extension of the return pump station including adaptation of the speed controlled return pumps 11 Laying the new NKB to the pumping station 12 Heat exchanger sludge preheating 13 Drainage line of new NKB to receiving water14 Conversion of silo 1 to mixing and expansion tank before digestion installation of agitator 15 Extension new construction of company buildings control cabinets pumps heat exchangers etc The future treatment process should therefore look like this Sludge is drawn off from the new primary clarifier and the secondary clarifier and thickened by machine to a dry matter content of at least 4 Then the sludge is pumped into the digester where it rots with a hydraulic residence time of approx 7 days anaerobic sludge stabilization The released carbon dioxide and methane is transferred to a gas storage facility Before the sewage gas from the gas storage is used it undergoes an activated carbon adsorption in order to remove undesired substances especially hydrogen sulfide from the gas Thereafter electricity and heat are generated by burning the sewage gas in a combined heat and power plant CHP If due to a malfunction more gas is temporarily produced than can be temporarily stored or used excess gas is burned in a gas torch The heat also obtained in the CHP can be used by means of a heat exchanger to preheat the sewage sludge to the 37 degrees Celsius necessary for digestion The electricity is used directly to cover their own needs Time limit for receipt of tenders or requests to participate Date 05 06 2020 Local time 18 00 Disclaimer The above text is machine translated For accurate information kindly refer the original document
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