Aquaplus is your partner for any type of waste water treatment. We have a wide range of expertise and technics available for this. They all have safety, sustainability, ecological approval and economical performance in common.
A correctly dimensioned and managed waste water buffer tank can level out hydraulic and waste load peaks to permit a more economical design and lower operating costs for the next treatment steps.
Septic tanks and grease separators
In a septic tank, solids either sediment or dissolve into the waste water. This step avoids silting in the sewers and reduces the risk of flooding and odour nuisance. Substances discharged into a septic tank are converted into small particles.
Grease separators work by the principle of gravity. With their higher density than water and vegetable or animal fats, the heavy components sediment in the sludge collecting chamber at the bottom of the separator.
Good pre-filtration protects the downstream process steps and water treatment apparatus. For each application we choose the most appropriate pre-filtration. This ranges from very simple systems such as sieve baskets or bow sieves to more automated installations with cleaning systems, for example rake grids, step screens or drum sieves.
Dissolved Air Flotation (DAF)
This technology serves as a pre-treatment to remove fats or suspended solids in the industrial waste water, or to thicken the excess sludge. Prior to Dissolved Air Flotation (DAF) coagulation and flocculation are used to form larger floc particles in the waste water treatment stream.
Water treatment with activated sludge takes place through the biological decomposition of organic water pollution. Bacteria in sufficiently high concentrations, adapted to the specific industrial waste water type, break down the waste water. The degradation processes take place in the aeration basin by applying sufficient oxygen via an aeration system. Biological nitrogen and phosphorus can also be removed with an adapted design and adapted processing.
Sludge on carrier, SAF / Biorotor
Bacteria that are allowed to grow as a biofilm on a carrier can be kept in the system for longer. The resulting biofilm serves to treat the water.
Anaerobic / UASB
In anaerobic treatment, special groups of microorganisms convert organic material into biogas (in particular methane and carbon dioxide), which can be used for electricity and heat production. This biogas can be converted into heat and green electricity via a combined heat and power (CHP - also referred to as 'cogeneration') system . Also much less sludge is produced than with aerobic treatment.
In a membrane bioreactor (MBR), the separation of activated sludge and treated water takes place, not by sedimentation, but by membrane separation. This allows higher sludge concentrations to be achieved, thereby saving space and ensuring better treatment of difficult-to-decompose waste water.
Membrane separation is used when more extensive removal of suspended particles or dissolved salts is required, for example when upgrading biologically treated effluent to process water. A specific application of this in combination with activated sludge is the membrane bioreactor (MBR).
Adding chemicals makes smaller waste particles clump together (coagulation), after which they flocculate, and can then be separated by sedimentation or DAF.
Sand or disc filter
In a continuous sand filter, biologically purified waste water is passed through a filter bed consisting of grains of sand, which retain the floating particles. Using an airlift, this sand is continuously circulated over a sand washer, and the particles removed. A more compact alternative to a sand filter can be a disc filter. Here the particles are filtered through filter plates that can be rinsed clean via rotation and a spray system.
Some contaminants in industrial waste water are not or hardly biodegradable and remain in the biologically treated effluent. We can test your industrial waste water to determine how far the substances to be removed can adsorb into activated carbon.
Post-sedimentation is a crucial step in the waste water treatment process. Even with an optimal biological treatment process, poor sedimentation can totally compromise effluent quality.
Sludge thickening and Sludge dewatering
The excess activated sludge from the industrial water treatment plant, also called excess sludge, can be partially thickened by a special thickening process. This is necessary for subsequent transport. This is done gravitationally, mechanically via a thickening table or via Dissolved Air Flotation (DAF).
Sludge dewatering is then done by one of a variety of technologies: screw presses, centrifuges, sieve belt presses or filter presses.
All these technologies save costs by reducing sludge transport mileage.
In a sludge drying installation we dry sludge from water treatment plants. The dried sludge can then serve as a secondary fuel.
The sludge can be dried at low temperature with locally available residual heat. In this way, energy can be transported via dried sludge and put to use in a high temperature setting.
Odour nuisance can occur when treating industrial waste water or processing sludge. Concentrations of substances like H2S or NH3 can be so high as to become life-threatening.