Who: Amit Shrivastava, P.E.
When: Friday April 5 at 11:00 AM
Where: PKI 160, KH A445
Abstract:
This talk details the design, construction and startup/commissioning of the first green field aerobic granular sludge (AGS) treatment system in South Sioux City, Nebraska. The facility is designed to treat high. This talk details the design, construction and startup/commissioning of the first green field aerobic granular sludge (AGS) treatment system in South Sioux City, Nebraska. The facility is designed to treat high strength industrial wastewater from a combination of meat packing, grain milling, and pea protein industries. Covered anaerobic lagoons (CAL) are used for pretreatment prior to feeding into the AGS system. Treated effluent is disinfected using UV technology. Aerobic digestion and belt filter press dewatering is used for biosolids processing. Startup of a greenfield facility that included CAL and AGS and multiple other components presented multiple challenges such as seed sludges for both CAL and AGS; Preheating CALs to desired temperature; preconditioning the CAL for the right pH requirements; procedure to introduce influent wastewater; initial dilute flush going from CAL to AGS; controlling AGS process for granule growth; control wasting rates from the process to promote faster granule growth; having a back up plan for redirecting the influent flows due to unforeseen upsets during the start up process. All the above challenges and many others had to be carefully navigated while trying to meet the NPDES permit requirements. Careful planning, involvement and commitment of the stakeholders involved and well laid out plan helped in the smooth start up of the facility in June 2023. The plant has been in operation for 9 months and has been successful in meeting all the permit requirements through this period.