4 Adverse or Hazardous Properties () (P) Toxic Corrosive Abrasive Odorous Other (specify) 5 Flocculant Details (P/S) 6 Details of Other Chemicals Added to the Feed Sludge (P) 7 Other Sludge/Flocculant Properties (If Known) (P) 5.0 PERFORMANCE SPECIFICATION 5.1 General 1 Design Life (Years) (P) 5.2 Duty, Operating Speeds and Absorbed Power 1 Duty/Utilisation (P) Hrs per day Days per week 2 Method of Bowl Speed Variation () (P/S) Fixed speed motor with variable drive belt pulley ratios Variable speed motor Hydraulic motor Other (specify) 2 Maximum Bowl Speed (rpm) (P/S) 3 Method of Scroll Conveyor Speed Variation () (P/S) Fixed speed motor with variable drive belt pulley ratios Variable speed motor Hydraulic motor Other (specify) 4 Bowl/Scroll Differential Speed Range (rpm) (S) 5 Maximum Absorbed Power (kW) (S) 5.3 Process Performance 1 Thickened/De-watered Sludge Solids Content (wt %) (P) Required range (minmax) 2 Solids Recovery (P) Minimum required 3 Centrate Solids Content (ppm ss) (P) Maximum allowable 4 Sludge Throughput (m3/hr) (P/S) Required range (minmax) (P) Maximum achievable (S) 5 Flocculant Dosing Rate (kg/tds) Maximum required (S) 5.4 Noise and Vibration 5.4.1 Noise 1 Expected Noise Levels (dB (A) at 1 m) (S) 2 Acoustic Hoods/ Cladding Required (Y/N) (S) 5.4.2 Vibration 2 1st Critical Speed (% of Maximum Bowl Speed) (>130*) (P/S) 5.5 Life Cycle Costs 5.5.1 Energy Consumption 1 Specific Energy Consumption (P/S) Process Conditions (P) Sludge throughput (m3/hr) Feed sludge solids content (wt %) Thickened/de-watered sludge solids content (wt %) Energy Consumption (kWhrs/tds) (S) 5.5.2 Service Lives and Costs of Components 1 Expected Service Lives of Components Component (specify) (P) Life (x 103 hrs) (S)
2 Costs of Components (£)/Time Required to Replace Components (hrs) (S) Component (specify) Cost Time 6.0 DESIGN SPECIFICATION 6.1 General 6.1.2 Weights and Lifting Arrangements 1 Weights (kg) (S) Overall weight Maximum maintenance lift Maximum erection lift 2 Details of Any Special Lifting Accessories Required for Centrifuge Removal/ Installation (S) 6.1.4 External Corrosion Protection 5 Coating Specification (WIMES 4.01*) (P) 6.1.5 Guarding 6 Timed Interlock or Back EMF Switches Required (Y/N) (P) 6.1.6 Condition Monitoring 1 Additional Types of Condition Monitoring Required/Provided () (P/S) Bowl/scroll differential speed Scroll conveyor torque Bearing lubricant level/flow Other (specify) 2 Sensor Fixing Arrangements (P) 6.1.7 Information Plate 1 Data Required/Provided on Information Plate () (P/S) Manufacturer Date of manufacture Centrifuge type Serial number Max. bowl speed (rpm) G-force Bowl diameter (mm) Max. power input (kW) Weight (kg) Asset code Other (specify) 6.1.9 LV Assembly and Associated Electrical Installation (If Specified/Supplied) 1 LV Assembly Required/ Provided (Y/N) (P/S) 2 LV Assembly and Electrical Installation Specification (WIMES 3.04*) (P) 6.1.10 Maintainability 2 Maintenance Platform Required (Y/N) (P) 2 Reference for Platform Specification (P) 6.1.11 O & M Manuals 1 Reference for Particular Specification (P) 6.2 Base Frame(s) 1 Material (P/S) 6.3 Casing and Connections 6.3.1 Casing 2 Material (P/S) 3 Sealing Arrangements (P/S) 4 Centrifuge to Operate with an Odour Control System (Y/N) (P) 6.3.2 Connections
7.0 TESTS 7.1 Test Regime (Clause 7.1.1) Type of Test (P) Test Location () (P) Witnessing Reqs (P) Test Standard (P/S) Acceptance Levels & Tolerances (P) Works Site (Y/N) Notice (Days) Absorbed power (at duty point) kW Range of sludge cake solids contents wt % Minimum solids recovery Maximum centrate solids content ppm ss Range of sludge throughputs m3/hr Maximum flocculant dosing rate Kg/tds Maximum sludge cake flocculant content wt % Noise dB (A) Vibration BS ISO 10816 mm/s Other (specify)