Reducing Effluent Strength With A Re-conditioned SAF

Reducing Effluent Strength With A Re-conditioned SAF Designed to treat the effluent on site to acceptable levels for disposal to Welsh Water works Gross solids screened out of the effluent with Groundhog Standard and Super-Dry Separators prior to biological treatment Reduction in COD of 84% and Suspended solids of 75% mean massive reductions on trade effluent charges Above ground installation that reduced civil cost and installation time scale Re-Conditioned ex-hire system Low operation and maintenance cost. Payback would be expected within 2 years Project Description Menai Meats were continually failing their COD and S/S consents (with the threat of closure) as they had no facilities on site to biologically reduce the strength of their effluent. To screen out the gross solids from the effluent they have had Groundhog Separators installed since 1995. Pollution Control supplied a re-conditioned (ex-hire) high performance modular Eco-SAF biological system comprising of: Mechanical brush screens (Groundhog Standard and Super-Dry Seperators) for solids screening Primary settlement (existing) Hydraulic flow control Up-flow Bioreactor based on Submerged Aerated Filter (SAF) technology Flow 110m3/day Maximum COD 5270mg/l Maximum S/S 840mg/l Max hydraulic loading 12m3/hour Design flow 0.8l/s The on-site effluent treatment system is to treat the site wastewater to the minimum trade effluent quality as follows: Parameter Unit Permitted Discharge Achieved discharge COD (settled) mg/l 3000 800-900 BOD (5 day settled) mg/l 1200 300-360 Suspended solids mg/l 120 200-250 Preliminary Treatment Comprising of the following elements: Mechanical screening with two existing Groundhog Separators Pump station c/w Duty/Assist set back vortex impellor submersible pumps Existing concrete reception pits Secondary Treatment The Eco-SAF module – the essential biological stage where bacterial microorganisms are cultivated and actively consume the suspended organic material found in the decanted liquid from the primary process. The aerated cells are equipped with a fine-bubble aeration system distributing the oxygen required by the heterotrophic bacteria to grow. Oxygen is supplied to the air diffuser system by side channel blower that requires minimum maintenance. The module is a series of aerated cells and anoxic zones. The aerated cells are also furnished with fully submerged bio-film growth media to ensure that the microorganisms have a substantial area for growth and a stable environment. Full floor coverage with the aeration diffusers ensures there is maximum oxygen transfer and there are no ‘unaerated’ dead zones as in circular tank designs. The Eco-SAF system was selected for the following reasons: Predictable performance Lower operation and maintenance costs No interruption to the process whilst servicing the aeration system Modular design that can be added if production is increased Better whole life cost with payback within 2 years Easy installation with minimum excavation required Life expectancy of over 20 years with minimum maintenance No internal moving parts Easy to de-sludge Manufactured to Quality Management System ISO 9001 Download the PDF here

Reducing High COD, BOD & S/S Loads In Cheese Processing

Reducing High COD, BOD & S/S Loads In Cheese Processing Designed to treat the effluent on site to acceptable levels for direct discharge to field soakaway Gross solids screened out of the effluent Reduction in COD/BOD of 85% and Suspended solids of 90% Above-ground installation that reduced civil cost and installation time scale Low operation and maintenance cost Project Description F J Needs Ltd WWTP is a bespoke effluent treatment system and is based on our high-performance modular Eco-SAF biological system comprising of: Inlet pump chamber Mechanical brush screen for solids separation Hydraulic flow control Up-flow Bioreactor based on Submerged Aerated Filter (SAF) technology Final clarification in a Lamella Clarifier Flow 4m3/day Average COD 5900mg/l Average BOD 3500mg/l Average S/S 2500mg/l Design flow 0.12l/s The effluent treatment system is to treat the site wastewater to the minimum trade effluent quality as follows: Parameter Unit Discharge standard COD (settled) mg/l < 1000 BOD (5 day settled) mg/l < 500 Suspended solids mg/l < 120 Preliminary treatment: Comprising of the following elements Inlet pump station c/w Duty/Assist set back vortex impellor submersible pumps Mechanical brush screen Secondary Treatment: The Eco-SAF module – the essential biological stage where bacterial microorganisms are cultivated and actively consume the suspended organic material found in the decanted liquid from the primary process. The aerated cells are equipped with a fine-bubble aeration system distributing the oxygen required for a healthy and stable population of heterotrophic bacteria. Oxygen is supplied to the air diffuser system by a side channel blower that requires minimum maintenance. The module is a series of aerated cells and anoxic zones. The aerated cells are also furnished with fully submerged bio-film growth media to ensure that the microorganisms have a substantial area for growth and a stable environment. In addition, full floor coverage with the aeration diffusers ensures maximum oxygen transfer and no ‘unaerated’ dead zones as in circular tank designs. Final Settlement – Clarifier. Any remaining solids (Humus) are settled out of the biologically treated effluent with a lamella pack and returned upstream as enriched activated sludge (RAS) to be absorbed in fresh wastewater. The lamella pack increases the active area and therefore improves the settling ability of the sludge within a small footprint. The Eco-SAF system was selected for the following reasons: Predictable performance Lower operation and maintenance costs No interruption to the process whilst servicing the aeration system Modular design that can be added if production is increased Better whole life cost Easy installation with minimum excavation required Life expectancy of over 30 years with minimum maintenance No internal moving parts Easy to de-sludge Manufactured to Quality Management System ISO 9001 Download the PDF here