Worry Wastes in Water- De c '05 1 MIDFIELD MEATS CASE-STUDY
Jan 14, 2016
Worry Wastes in Water- Dec '05 1
MIDFIELD MEATS CASE-STUDY
Worry Wastes in Water- Dec '05 2
Midfield Meats Project requirements• Technical
• An alternative to DAFF• Easily integrated into existing• Offers future enhancements to water quality
• Operational• No chemical dosing
• Quality• Midfield’s claim “We aim to be the best”• Reduce SS and BOD loadings specifically• To improve existing WWTP performance
• Cost• Reduce loadings to lower Trade Waste Charges• No ongoing chemical costs
Worry Wastes in Water- Dec '05 3
Original WWTP Plant
Worry Wastes in Water- Dec '05 4
With Two Baleen filter unitsGreen Stream (front) & Red Stream (rear)
Worry Wastes in Water- Dec '05 5
Green StreamAverage Peak Daily Operating hrs
Wastewater Flow to Primary Treatment Upto 30+ Lps (or 108 m3/hr) Upto 1.0 ML 12+
BOD (highly variable) Upto 10,000+ mg/L
SS (highly variable) Upto 10,000+ mg/L
Wastewater Flow to Baleen Filter after Pre-screens and Contra-Shear
(Absolute rating ~0.5 mm)
~30 Lps (or 108 m3/hr)
BOD to Baleen Filter Upto 2,500+ mg/L
SS to Baleen filter Upto 2,500+ mg/L
Temperature < 30 deg C
Worry Wastes in Water- Dec '05 6
Green Stream micro-screening
Worry Wastes in Water- Dec '05 7
Red StreamAverage Peak Daily Operating hrs
Wastewater Flow to Primary Treatment Upto 20+ Lps (or 72 m3/hr) Upto 0.5 ML 12+
BOD (highly variable) Upto 10,000+ mg/L
SS (highly variable) Upto 5,000+ mg/L
Wastewater Flow to Baleen Filter after Pre-screens and Contra-Shear (Absolute rating ~0.5 mm)
~20 Lps (or 72 m3/hr)
BOD to Baleen Filter Upto 10,000+ mg/L
SS to Baleen filter Upto 5,000+ mg/L
Temperature <50 deg C
Worry Wastes in Water- Dec '05 8
Red Stream micro-screening
Worry Wastes in Water- Dec '05 9
Combined Treated water Discharge BOD(daily composite average based upon ¼ ly)
600-650 mg/L
Combined Treated Water Discharge SS(daily composite average upon ¼ ly)
600-650 mg/L
Red + Green Stream Pre-discharge
(without chemicals)
Green stream 1.3mm screenings
Green stream 0.065mm screenings
Worry Wastes in Water- Dec '05 10
Water Quality • Before Baleen
• SSav1400mg/L
• BODav1400mg/L
• FOG N/R
• After Baleen
• SS av625mg/L
• BOD av625mg/L
• FOG av250mg/L
• After in-series CAF
• SS 280mg/L
• BOD 380mg/L
• FOG 35mg/L
Worry Wastes in Water- Dec '05 11
Micro-screening plus CAF
INFLUENT FILTRATE
Worry Wastes in Water- Dec '05 12
Abattoir effluent pre-CAF
Worry Wastes in Water- Dec '05 13
Abattoir effluent post CAF