PRO000138 Davyhulme AMP5 Water Framework Directive (WFD).

Descriptions

1. A new Activated sludge plant (ASP3) is required to replace one of the existing ASP streams (ASP1, or ASP2). The new ASP3 stream shall treat 60 % of incoming flows and shall solely receive and treat the SBAP dewatered centrate liquors. It shall be assumed that 60 % of the SBAP thickened sludge liquors shall enter ASP3;2. A new inlet works is also required as part of the scope of works, which would replace part of the existing ASP2 inlet works and reduce flow to the existing ASP1 / storm inlet works. The new inlet works will receive flows up to the consented FTFT of 714 Ml/d. Flows in excess of 714 Ml/d will spill to the existing ASP1/ storm inlet works and gravitate to the existing storm tanks. Control of flows to the new ASP3 and the retained existing ASP will be downstream of the new inlet works;3. Refurbishment of the plant and equipment on the retained existing ASP stream are also required as part of the scope of works.The new ASP3 stream will consist of primary settlement tanks (PST), fine bubble diffused air (FBDA) type ASP, final settlement tanks (FST) and mechanical thickening of Surplus Activated Sludge (SAS). It will be required to produce a treated effluent to meet the future FE consent. FE from the new ASP3 stream will re-join the existing final effluent culvert, prior to discharge into the Manchester Ship Canal. The new treatment facility shall be totally independent of the existing BAFF.The new Inlet Works will consist of a diversion chamber on the existing inlet sewer, storm overflow structure, FTFT flow control, coarse and fine screens, bypass and associated infrastructure.Odour abatement technologies shall be required for the more odorous technologies.The Contract will incorporate the following:Design, construction and commissioning of the new works.Works to ensure compliance with the requirements of the EPR permit:Internal site roads within the new treatment facility areas;New site access road from the new treatment facility to a new site entrance;Construction of a new primary sub-station building;Modifications to existing site high voltage electrical infrastructure;Ancillary and accommodations works — site drainage and return;Electrical instrumentation control and automation (EICA) and a distributed control system (DCS).