Equipment For Wastewater Treatment Plants

A clarifier is a round shaped conical bottom funnel type tank. Waste water to be treated enters by a pipe into the clarifier located at the centre of the clarifier and is so designed as to reduce the velocity of the incoming water and also ensure that incoming water is uniformly distributed in all directions to fully utilise tank capacity and to have maximum possible settling time. Adequate time is built into the design to cause separation of settleable material from water. This matter gradually travels down to the slope of clarifier and becomes sludge. The water on top surface is without these particles and is much clearer. This clearer water is designed to over flow out via launder.

Where water has to be clarified through addition of flocculants and where design considerations demand, clariflocculators provide an optimum solutions by giving high efficiency and economy of space and operation. In Akar clariflocculators, effluent mixed with flocculants is guided to the flocculation chamber. In the flocculation chamber rapid settling flocs are formed. The clariflocculator is designed as to cater to the capacity requirement both in terms of quantity of effluent as well as the flocs settling time consideration.

Oil skimmers or Oil removal systems are used in a waste water treatment plant to remove excess oil from sewage or Industrial Effluent water. In a sewage treatment plant oil gets accumulated after the kitchen. Kitchens use most of the oil and this oil contaminates sewage. Similarly in the case of industrial effluent treatment plant oil is released from industrial processes as waste water used for washing contains oil which must be removed for more efficient treatment. Oil skimmers are of different types. Tube type oil skimmers, belt type oil skimmers etc.

Akar Dissolved Air Flotation (DAF) system is the most versatile and effective wastewater processing equipment to remove emulsified oil which is other wise extremely difficult to separate from water. As a separation device it generally will affect the highest solids capture and will yield the highest level of recovered solids under a wide range of flow conditions. Oil/grease and suspended solids removal rates of greater than 95% are normal. There are some sites reporting 99.9% O&G and SS removal. Because of the outstanding performance and reliability, the DAF is the preferred process for a wide range of industrial treatment problems. Akar has supplied many DAF systems to prestigious clients. Some of these systems have been functioning since the last ten years.

These are also known as clarifiers or sedimentation tanks. They can be circular or rectangular. Settling tanks operate on the principle of slowing the flow sufficiently so that slow settling materials can sink and be collected and removed. Typically, 60 to 70 percent of suspended solids and 30 to 40 percent of organic matter in raw sewage is removed. Floating oil and fats can be removed if a scum collection system is installed. Settling tanks are also an important part of other treatment processes, particularly biological treatment where they are normally called secondary clarifiers. The sludge which collects at the bottom needs to be removed frequently, and usually mechanical scrapers are installed to do this. The sludge produced must be further treated before disposal, usually by aerobic or anaerobic digestion, chemical stabilisation, composting, or incineration.

These are also known as clarifiers or sedimentation tanks. They can be circular or rectangular. Settling tanks operate on the principle of slowing the flow sufficiently so that slow settling materials can sink and be collected and removed. Typically, 60 to 70 percent of suspended solids and 30 to 40 percent of organic matter in raw sewage is removed. Floating oil and fats can be removed if a scum collection system is installed. Settling tanks are also an important part of other treatment processes, particularly biological treatment where they are normally called secondary clarifiers. The sludge which collects at the bottom needs to be removed frequently, and usually mechanical scrapers are installed to do this. The sludge produced must be further treated before disposal, usually by aerobic or anaerobic digestion, chemical stabilisation, composting, or incineration.