Bioremediation of Waste Water

Editorial

Today’s emphasis on sustainability, along with stricter discharge limits, has led to high-quality waste water being a top priority for cleaners. To achieve these goals, many plants focus on nutrient removal by reducing nitrogen and phosphorus levels through a number of advanced wastewater technologies.

The following is a look at some of the processes that are used to remove nutrients.

Sequencing batch reactors

Sequencing Batch Reactors treats part of the total waste water flow of the day in a batch-type process. There are usually at least two Sequencing Batch Reactors tanks on site and are identical in structure and equipment. The inside of an Sequencing Batch Reactors tank contains aeration diffusers, submersible mixers, inlet and drain valves, waste water, waste pump and level sensor or float drainage pipes. An Sequencing Batch Reactors tank carries out all the work of previously treated processes, but does it all in a tank. The Sequencing Batch Reactors tank that receives raw waste water goes through a series of selective processes such as anaerobic, anoxic or aerobic time cycles. These cycles are controlled by a computer system that the operator programs to achieve the desired wastewater treatment objectives. As the flow of effluent flows into one Sequencing Batch Reactors tank, the other does not affect and performs the last aeration (react), settles, decant or wastes. After the Sequencing Batch Reactors tank has cooled a portion of its total liquid volume, it is ready to treat another party of influent wastewater. An SBR treatment facility does not have secondary clarifiers or RAS pump systems and can meet very strict effluent constraints on a small ground footprint.

Membrane bioreactor process

Membrane bioreactors form a unique purification process designed for domestic and industrial use. These are a combination of membrane processes, such as microfiltration or ultra filtration, the growth bioreactor in suspension. MBR can be used in water recycling applications and new homes for ministries, editing and turnkey projects. There are two types of membrane bioreactor: indoor / immersion, where the membranes are immersed in the biological reactor and the outer / side stream, whereby the membrane is a separate unit pumped between processes. Membrane bioreactors can be used to reduce the footprint of the system for treating waste water with active sludge. Wastewater membrane bioreactor can be consistent, high-quality effluent, which lends itself well to reuse public produce, municipal and irrigation uses more water to use. It is also suitable for drainage to the coast, brook or surface waters. This can help protect the environment treatment of waste water and makes it suitable for a variety of application and thus preserves precious drinking water. The biological system developed for the MBR procedures works with a higher concentration MLVSS with increased sludge retention time and therefore produces a slower quantum biological sludge, which reduces the costs for the sludge dewatering. The biological process of liquid is pumped to the operating system of membranes. The mixing liquid is introduced to the membrane, along with the air evenly over the bottom of the tank through a unique system of two phases. This fills the liquid membrane mixed with the tanks and flows upwards through the membrane modules to create a dynamic cross flow across the membrane surface. This cross-flow membrane surface is continuous and prevents the drying out solid on the surface of the membrane. The application of a low pressure vacuum inside the fiber membrane removes the water through the membranes and pumped filtered water into the next step of the process. The solids, including organic bacteria and most viruses are passed through the membrane system and remain in the mixed liquid, which rejects MOS animators.

Moving bed bio-reactor

The technology of the moving bed bioreactor is a combination of adjustable and suspended growth technologies. Under this process, the media remain suspended to the reactor and offers additional surfaces for microbes to grow. This, in turn, maximizes the growth of microbes in a certain volume of aeration tank compared to conventional aeration without the means of communication. The Bio-Film grows on the surface of the bio media and moves along with the water inside the reactor chamber creating the biomass. The efficiency of this biomass in the reduction of the organic load in wastewater is the result of the satisfactory operation of the moving bed bioreactor system. Treatment plants are updated to increase biochemical oxygen demand and the ability to eliminate nutrients from wastewater by improving the use of existing reactor capacity. Existing activated sludge plants can also be upgraded to achieve the removal of nitrogen and phosphorus. The control system based on PLC optimizes the performance of the IFAS / moving bed bioreactor process minimizing the energy and chemical costs. When selecting innovative moving bed bioreactor solutions, municipalities can face evolutionary regulation, aging infrastructure and a growing population. Industrial plants can meet the most stringent regulatory requirements for the discharge of waste water into the environment or municipal collection systems, and address typical challenges such as variable fluctuation, seasonal peaks and high organic loads. These units can also be implemented as the main processor unit in some biological purification systems, where they can then act as an aeration tank purifier. Typical applications are low-resistance BSK waste water treatment moving bed bioreactor systems that generate low TSS after the aeration system.

Dissolved air flotation thickener

TIL offers a thickening agent dissolves air flotation to thicken the sludge, especially before digestion tanks. This unit separates the sludge floating process with dissolved inert air flotation and reduces to the bottom, eliminating it separately to prevent its penetration into the digestion tanks, thereby reducing maintenance costs. The main features of this unit are similar to DAF separators, which are described in a separate section.

Rotary Vacuum Drum Filter

Filtration Rotary Drum Filter is one of the most widespread practices in the industry, which drains all kinds of sludge at the low investment costs. Although these units consume higher energy due to the implantation of a vacuum pump, these units are still in a preferred situation because of their low cost of maintenance. These units can be supplied in various sizes for 80-90 m2. Filtration area per unit Depending on the type of clay can be dehydrated arrangement different solid dispensing mechanism, for example Drainage knives unloading strip and unloading chains as. These units can also be supplied from carbon steel, stainless steel and rubber design to meet the specific application requirements. Rotary vacuum drum filter is supplied with a separate filter separator and other accessories, such as filtering pumps, vacuum pumps and blowers etc.

Gravity belt thickener

The Gravity Belt Thickener method is one of the most effective sludge pre-thickening units that can be applied for various organic and inorganic sledges to achieve the desired results at the lowest operating cost. The Gravity belt thickener can handle very lean sludge and has an independent gravity drainage bridge. The sludge pre-thickening in Gravity belt thickener is carried out by uniformly spreading the mud over the full width of the appropriately sized belt, on which is provided a drainage bridge of independent gravity. The belt is carried on a set of rollers which hold the belt under tension by the hydraulic cylinder system. Pre-thickened sludge is then discharged to the next processing unit for further processing. A suitable arrangement is provided for the automatic tracking of the belt which makes the operator of the system friendly.

Gravity belt thickener units can be supplied in carbon steel or stainless steel depending on the requirement of working in different sizes up to 3 m wide.

In short, the waste water treatment process is one of the most important environmental protection processes that should be supported around the world. Most sewage treatment plants process wastewater from households and retail outlets. Industrial installations, refineries and wastewater treatment plants are usually treated on-site. These devices are designed to ensure that waste water is treated before it can be discharged into the local environment.