Presentation on theme: "Waste Water residuals and land application"— Presentation transcript:
1 Waste Water residuals and land application Robert HarrisSmithfield Packing CompanyTar Heel, NC
2 Tar Heel – a study 3 very different situations 1) Davco – sanitary systemHandled as a liquid sludge to a POTW (publicly owned treatment works – i.e.. A city)2) Conventional Activated SludgeHandled as a belt pressed sludge and sent to the public landfill as a beneficial use solid3) Anaerobic BasinsHandled as a liquid sludge and spread on local farms
3 Davco – plant bathrooms Generates 40,000 gallons of sludge (liquid) per month on average.Subject to 503 regulations because of “human” factor40 CFR 503–Disposal of Sewage SludgeDomestic sewage biosolidsWant to avoid “503” and stay industrial user
4 Handled by Sewage hauler Not dewatered – no capacity for belt wash waterWater cannot enter Activated Sludge systemPlant Water Re-useHandled by local Domestic WWT plant (PWC – Fayetteville NC)
5 Conventional Activated Sludge solids 5MM gallons under aerationCannot land apply – 2 windows for Land Application in this area and we generate year roundInstalled a 2 meter belt press (BMP)Average 120,000 gallons of wasted activated sludge per dayAttain working average of 13% solids with peaks in the 15% area
6 HaulerUtilize our Licensed Land Application hauler to take to local landfillGet excellent rates based on tonnageGet excellent rates because it activates their domestic trash in a biogas to energy process that they have goingNot technically recycling – but certainly the next best thing.
7 Opportunities for Land Application We have looked into land application on non farming sites and there is some opportunityFinancially this is a bad decisionPoundage would go down and lose preferential tipping fees.Costs would actually go up, even though we were hauling less loads to the landfillLandfill will NOT adjust because they desire our sludge for activation of domestic trash
8 Anaerobic lagoons Huge storage capacity (15MM gallons each – 2 basins) Have the ability to hold solids so that we can land apply during the farmer’s “window”Hauler is able to negotiate excellent pricing because we operate on HIS schedule.
9 Improvements Centrifuge Solids and grease recovery Huge money generator (1.7MM annually)Solids have decreased to the degree we will move from twice a year land app to a single event saving an additional $ K per year
10 Interesting facts Hauler is full service Provides all monitoring and testingProvides a bound state report at the end of each application yearAll farms are permitted to the hauler2 – 4 Million gallons applied per event
11 Potential issues to consider We have no permitted fields of our ownPositive – no public hearings, postings, etc with “Smithfield” on themNegative – we are limited to haulers that provide this serviceWe are responsible for everything – you CANNOT sign away your responsibilitiesSpillsErrors in annual report
12 Questions? 757-613-1339 – Direct line anytime Buddy Harris – Jeff Musselwhite– Roland (Rocky) Beem – regulatory questions
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