Helical gear box H2 flender group H2CV-27-C

Flender/Flender Gear Units/Helical gear box H2

5-5 Table 5-2: Final Effluent Discharge Parameter Limits for JP Marais WWTP (DWS Permit No. 2B) Parameter Unit limit COD mg/ 5 Free and Saline Ammonia mgN/ 4 Nitrate/Nitrite mgN/ 6 Ortho- (2- mgP/ 0.6 Total Suspended Solids mg/ 1 pH 6.5 < pH < 8.5 Electrical Conductivity mS/ 8 Coli CFU/1 0 5.4 PLANT CAPACITY AND PERFORMANCE 5.4.1 Baseline ( Infl uent Flows and Loads The measured influent flows and loads from 1st January to 3 December 2 were used as the baseline for the activated sludge aeration energy evaluati on. From January 2 to August 2, due to construction work at Welgedacht WWTP, part of th influent flow was diverted to JP Marais. This increased both the average daily flow and lo ads to JP Marais during this period. Data from routine site measurements was used to ca lculate the influent flows and loads given in Table 5-3. Despite the flow increase due to the diversion from Welgedacht WWTP, the average raw influent COD load was still 4% below the design value of 1,0 0 kg/. When the flow diversion discontinued in August 2, the average daily flow decreased by 4% while the average COD, TKN and Total loads decreased by 1%, 3% and 3% respectively. Graphical variations of the influent flow an TCOD load are given in Figure 5-3. Additional data was also collected through specia sampling program during the 2 winter (June to August) and 2 summer (January to February) to determine the seasonal diurnal flow and load patterns as well as robust wastewater characteristics for mathematical modelling. summary of wastewater characteristics obtained from this data is given in Table 5-4 5-6 Table 5-3: JP Marais WWTP 2 Raw Influent Flows and Loads (including design values) Parameter Units Jan-Aug Sep-Dec Annual Design Flows ADWF m3/ 1,2 1,2 1,2 1,0 ADF m3/ 2,4 1,6 1,6 Loads TCOD kg/ 9,1 7,5 8,6 1,0 TKN kgN/ 7 5 6 FSA kgN/ 4 3 4 Total kgP/ 9 6 8 Ortho kgP/ 5 3 4 TSS kg/ 3,3 2,2 2,9 C