BNWRP Biosolids Presentation Victorian Biosolid Steering Committee By Ron Crafter 17/11/2014

Ballarat North Water Reclamation Plant Contents Design Parameters of BNWRP Current Conditions Process Flows Wasting Process Thermal Dryer Design Parameters Thermal Dryer Isses Sustainability Biosolid Reuse

Ballarat North Water Reclamation Plant Design 8.4 ML/d Average Dry Weather Flow 21 ML/d Peak Wet Weather Flow 2/3 Domestic and 1/3 Industrial waste influent Carbon limited due to trade waste 2 process trains (except sludge dryer) Waste processing by centrifuges and thermal dryer Biosolids sustainable reuse to composter Class B effluent discharge to Burrumbeet creek Class B effluent processed to Class A and piped to Lake Wendouree

Ballarat North Water Reclamation Plant Current Approximately 6.3 ML/d Average Dry Weather Flow 21 ML/d Peak Wet Weather Flow not unusual McCain’s is 50% of nutrient load Carbon dosing - molasses/sugar Approximately 30% of effluent to reuse plant Biosolids to Agriculture

Ballarat North Process Reuse Primary Inlet Biological Reactors Secondary Tertiary Sludge Processing Lake Creek RAS WATER FLOW

Ballarat North Process Reuse Primary Inlet Biological Reactors Secondary Tertiary Sludge Processing Lake Creek SLUDGE FLOW WAS Dry Bio-solids

Waste - Sludge Process 3 % Dry Solids 0.6 % Dry Solids Primary Clarifier scum Biological Reactors Waste Activated Sludge Secondary Clarifier scum 0.6 % Dry Solids 3 % Dry Solids Fermenter solids Thickening Centrifuge

Waste Sludge Drying 17 % DS 90 % DS 3 % Dry Solids 90 % DS Raw Material silo Recycle Mixer Screens Crusher Sludge Blend Tank Dewatering Centrifuge Thermal Dryer Reuse 2/3 recycled 1/3 Reuse 17 % DS 90 % DS 3 % Dry Solids 70 % DS 90 % DS

Thermal Dryer Design

Reliability Centred Maintenance (RCM) Developed in the 60s, RCM is a structured review process that delivers the optimum maintenance based on identifying the risk associated with failure modes. The review was conducted onsite in 2011 Change “when to maintain” to “which maintenance to perform”

Proposed EPA approved Receiver direct from BNWRP Continuous Improvement for Sustainable Biosolid Reuse A P C D Proposed EPA approved Receiver direct from BNWRP EPA Approved Veolia EIP C D A P EPA Approved Veolia EIP Updated Improvement A P C D

BNWRP Biosolids “Source to Resource” Questions…