What is the sewage treatment package of residential complex?
Water shortage has become one of the most important issues in most countries of the world, including Iran. As a result, the reuse of wastewater in various fields such as agriculture and horticulture as well as industry has attracted the attention of many people. Since the majority of water resources are used in residential units and enter the natural cycle as domestic sewage, they can be returned to the natural cycle by treating and improving the quality of the effluents. The wastewater treatment package of a residential complex is a relatively medium tank that is placed outside the building and inside or outside the ground to implement the treatment process.
The question may arise that large water treatment plants that are connected to municipal sewage also do the same thing and do not need these packages. It should be noted that many residential complexes in new cities are not able to connect to the urban sewage network and therefore it is necessary to carry out the treatment process on site for them.
Domestic wastewater treatment packages, which are a subset of residential township wastewater treatment packages, handle everything on a large scale with excellent quality and provide conditions for increasing the quality of effluent before returning to nature. The output of these packages is a very practical alternative for watering green spaces, gardening and agriculture, as well as cleaning surfaces and washing vehicles.
Characteristics of residential complex wastewater
According to research, each person in big cities consumes 120 to 200 liters of water daily. while in small cities it consumes 175 liters of water. If we want to separate the types of water consumption, we should know that about 25 to 50 liters are used in the bathroom, 10 to 20 liters to wash clothes, 5 to 15 liters to wash dishes, and 20 to 30 liters to the toilet. 2 to 3 liters are used in air conditioners and 3 to 5 liters are used for miscellaneous work. Detergents and soaps are found in significant concentrations in these effluents, as the bathroom uses the largest amount of water.
Pollutants in wastewater can be significantly reduced by using biological wastewater treatment methods based on domestic wastewater quality evaluation indicators. According to the sewage regulations, each of the indicators such as TDS, BOD, COD, TSS and sulfate and others must be within the acceptable range after treatment.
Domestic wastewater treatment methods
Considering the type of pollutants present in residential wastewaters and the relatively small number of dangerous compounds in them, their quality may be regulated at an appropriate level by performing physical and biological measures. As a result, the methods mentioned below can be used in the residential wastewater treatment plant
Physical wastewater treatment
Physical treatment includes the collection of large solid particles as well as filtering, which has no effect on changing the effluent quality indicators. The only advantage of this step is that it improves the treatment conditions in the following steps and prevents damage and blockage of other equipment.
Biological wastewater treatment
Because of the high content
BOD in residential wastewater, significant focus on use
It is one of the aerobic and anaerobic biological methods to reduce them. Purification methods
The used depends on the type of pollutants. The most common ones are IFSA MBBR, RBC, SBR and MBR.
Chemical wastewater treatment
This stage of the work is done partially and is not as important as the industrial wastewater treatment package. Colloidal suspended particles are collected using coagulants. At this stage, chlorine and other disinfectants are used.
The most common methods of wastewater treatment in residential complexes
Estimating the volume of produced wastewater is very important to determine the tank capacity of the wastewater treatment package of residential complexes. As you know, various types of wastewater treatment methods are used in the wastewater treatment package of residential complexes. In the rest of the article, we describe the most common wastewater treatment methods used in the wastewater treatment package of residential complexes
Wastewater treatment by IFSA method
The IFAS wastewater treatment method, which is one of the secondary treatment methods, is one of the most common methods used in the wastewater treatment package of residential complexes. This semi-wastewater system consists of three different sections of absorbent filters, biological treatment section and rotating biological contactors.
This system performs the purification action based on activated sludge. Activated sludge on a fixed bed (larger size beds that are placed on the bottom of the tank and require larger size tanks) or mobile bed (smaller size beds that need smaller tanks and at the same time Due to being suspended in the treatment tank, they have a higher contact surface and efficiency) is grown.
A part of the sludge that grows on the substrate itself, or the media, is called fixed-growth sludge, and the other part that grows on the sludge is called suspended-growth sludge. For this reason, this system is also known as the system with sticky and suspended growth or integrated system. The biological treatment in this system finally destroys the organic matter and the treated effluent remains as a clean output.
Wastewater treatment by MBBR method
The MBBR treatment system, which is used in the wastewater treatment package of residential complexes, consists of an aeration tank (similar to an activated sludge tank) with special plastic carriers. On these plastic carriers, which are mainly made of high density polyethylene and their density is close to the density of water (density one), biofilm grows and finally this biofilm is a factor for wastewater treatment.
Carriers are spread on the surface of the tank using aeration energy in the MBBR wastewater treatment method, and this is a factor for uniform treatment. One of the advantages of this system is that it requires less space to install the sewage treatment package. On the other hand, the efficiency of this system is very high and they do not need to recycle sludge. The higher the number of carriers in this system, the better and faster the purification.
Wastewater treatment by RBC method
In the wastewater treatment package of residential complexes, from
RBC wastewater treatment method is also used. RBC or contactor purification method
Rotary biological is one of the series of wastewater treatment processes based on activated sludge. At first
Wastewater must pass through a filter to enter this system. This leads to the removal of particles in the wastewater. After this stage, the biological treatment of sewage practically starts.
Discs that are installed on the rotating shaft
They are placed above the level of sewage and perform purification. Of course, it should be noted
that if this system is used in the sewage treatment package of residential complexes. Source
Electricity supply should be installed for it. Protect from exposure to climate change.
To be able to with the sewage treatment package
Kurdish residential complexes must have a professional workforce. Of course, in addition to all these disadvantages, there are advantages such as less production of sludge, proper treatment of BODs and organic substances, less space required for the installation of the industrial and sanitary wastewater treatment package and other future wastewater treatment packages of Sazan Arsham Sanat and the stability of the process. Attention to use this system in the integrated wastewater treatment package
are residential.
Wastewater treatment by SBR method
One of the common methods used in the wastewater treatment package of residential complexes is SBR treatment.
During this method, there is a tank that has the possibility of mechanical treatment, and the sewage is crushed by mechanical tools after entering this tank. The secondary treatment part of this system is based on activated sludge and is a type of biological treatment.
The second stage of purification in this method is aeration, with the help of aeration diffusers, oxygen reaches the wastewater and biological purification is done. In the next step, the wastewater should be settled and during the aeration process as well
It is done and finally the treated wastewater is removed from the tank.
Aeration takes 60 to 90 minutes depending on the amount of wastewater. This type of wastewater treatment,
It can also lead to nitrification. There is another type of SBR process, which is anaerobic, but it is not mainly used in the wastewater treatment package of residential complexes.
Wastewater treatment by MBR method
One of the best treatment systems used in the wastewater treatment package of residential complexes is the MBR bio-membrane reactor wastewater treatment. This method is a combination of two biological reactor methods and filtrations
such as ultrafiltration or
It is microfiltration. There are two types of configurations for this system, one of which is internal/submersible and the other is external/side. In the indoor/immersion system, the membranes in
Wastewater is submerged and in the second method, the membrane is separated from the main system and separate membrane treatment is performed.
As technology advances, this type of wastewater treatment system improves and becomes more reliable.
Components of the residential complex wastewater treatment package
These packages, as previously stated, are a subset of a small sample of sanitary wastewater treatment packages, and the components
Their interior is the same. One of the basic components inside these wastewater treatment packages,
The types of polypropylene tank are with metal body or fiberglass body with epoxy coating and its size and dimensions are determined by volume.
The incoming effluent is determined and controlled. Debris cleaners for physical treatment, system
Aeration and air pump for biological treatment, inlet and outlet valves, pipelines and electrical panels are all included in these packages.
The price of the sewage treatment package of the complexes residential
The size and capacity of the tank is the most essential element in determining the price of wastewater treatment packages
Residential complexes. In addition, the thickness of the material and the thickness of the tank body may have a significant effect on the final cost of the project. other
Variables that determine and influence the price include the brand and type of equipment as well as the internal components used in the package.
Design and production of wastewater treatment packages for residential complexes
The amount of wastewater produced in residential complexes is determined based on the number of people living in the area. These tanks and packages must be designed and produced separately. The process of designing and manufacturing wastewater treatment packages for residential and home complexes with
Calculating the amount of water consumed and produced waste water and then measuring the quality indicators of waste water and choosing suitable treatment methods and finally building with materials and standards with
Quality begins. In other words, all these packages must be personal, unique and suitable for the installation environment.
Ati Sewage Treatment Group of Sazan Arsham Sanat is one of the manufacturers of sewage treatment packages, which meet the requirements and make completely customized products.
Provides reliable quality.
