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:
The effluent treatment system is to treat the site wastewater to the minimum trade effluent quality as follows:
|COD (settled)||mg/l||< 1000|
|BOD (5 day settled)||mg/l||< 500|
|Suspended solids||mg/l||< 120|
Comprising of the following elements
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.