Local wastewater treatment in rural and low population areas
Central wastewater treatment is not cost effective in low-population areas. Wastewater treatment units in rural areas should have high life units, which, according to the standard rules of units life in the treatment plant, are about 15 years (regard to depreciation). Therefore, when comparing the price, in addition to the initial costs, it was necessary to pay attention to operating costs during the operation. If the system is not well equipped, it will cost a lot of spend during operation.
BR: Optimal process for wastewater treatment in rural and low population areas
SBR process (Sequence Batch Reactor) is one of the methods of wastewater treatment using activated sludge, which includes filling, aerating, sludge deposit and sludge discharge. All these steps are done in a tank which occupy small space and very suitable for small areas. However, in traditional sewage treatment systems, pre depositing, biological treatment and secondary clarification processes are separate.
The SBR’s units are capable of increasing the quality of the wastewater to an environmentally acceptable level and there is no concern about raising the environmental level in the future. In these units, the best available technologies are used to achieve the highest standard of sewage treatment systems, and these units guarantee the following options:
• SBR systems for 4 to 50 people
• SBR systems for 51-5000 people
1. SBR sewage treatment system for 4 to 50 people
Unlike traditional wastewater treatment systems that combine primary clearing, biological treatment, and secondary clarification units together, the SBR wastewater treatment system comprises a sewage treatment tank that includes the following steps:
Tanks used for wastewater treatment with a capacity of 4 to 50 people are multi-compartments and typically have 3 sections. Two smaller compartments are used for the preclearing and buffering processes, and the main clearing process in the SBR reactor is occured in a larger enclosure.
The 5 steps are controlled by the microprocessor. In terms of fully automated operation, the system works almost without any need for operation. It also saves up to 30% energy savings compared to traditional SBR systems. Protecting and maintaining this system is very easy due to its small size and compact structure.
Main equipment required by SBR system:
Balancing Tank :
The equilibrium reservoir is used to regulate the flow fluctuations and can control the fluctuations in the inlet flow of the wastewater entrance. If the wastewater flow is high, the wastewater level in the SBR primary clearing tank will increase and then enter in the Storage tank. The water in the storage tanks is slowly returned to the Primary clearing tank with a steady flow.
Nutrition injection and adjustment unit in SBR system:
This system is used to inject and regulate nutrients in wastewater. This system also allows the wastewater treatment unit to survive for a longer time without wastewater. It puts a certain amount of nutrients into the SBR reactor when inlet wastewater decreases or the system is resting for longer periods of time.
Disinfection Unit in SBR System:
This wastewater treatment unit is equipped with ultraviolet light (UV) technology. Here, the clear water is disinfected by ultraviolet radiation before leaving the system. The system is made of stainless steel to prevent ultraviolet radiation out of the system. By using UV rays, microorganisms are killed in the water. With this system you can reach the standard H + output.
Phosphor removal unit in SBR system:
Using this system with adding chemical materials, phosphorus can be deposited and separated from water.
2. SBR wastewater treatment system for 51-5000 people:
The system is used for the municipal wastewater process for 51 to 5000 people. The SBR includes a pre settling tank, a storage and pumping tank and, eventually, an SBR reactor tank. This system is available in the following three modes:
1-2. Systems for variable wastewater flows
2-2. Systems without pre settling
3-2. Systems without any electrical equipment inside the SBR tank
1-2. Systems for different wastewater flows
This system is used for different wastewater flows and variable flows of wastewater could be refined with mechanical flow regulator. The system could be installed as a wastewater treatment package and requires simple maintenance and repair. The pump used in this system is suspended, and as a result, the flow rate setting is continuously performing. It can also resist the high wastewater flows.
Outlet wastewater quality | · COD: mg/lit 90 · BOD: 20 mg/lit · Ammonium: mg/lit 10 · Nitrogen: mg/lit 18 · P: optional |
Advantages | · Adjustable for various capacities · Reliable sludge setting · There are important system auxiliary parts · PLC control capability, data transfer, measurement of oxygen content and …. · Separation of impurities from inlet wastewater to protect system technology · Elimination of collection equipment from septic tanks · No need for sludge preconditioning due to the simultaneous stabilization of sludge in the SBR reactor |
Application | · Wastewater treatment on site · For commercial use · Office buildings · Hotels · Biodegradable industrial wastewater treatment · Suitable for units with very variable wastewater flows · If the components are cementitious for 51 to 650 people, and if the cement tank is used for 51 to 1000 people. |
2-2. Systems without pre settling
This system can be used with up to 5000 people with all the pervious mentioned advantages. The particles in the inlet of the wastewater flow are separated by a spiral screener. This system does not need any pre settling.
Outlet wastewater quality | · COD: mg/lit 90 · BOD: 20 mg/lit · Ammonium: mg/lit 10 · Nitrogen: mg/lit 18 · P: optional |
Advantages | · Adjustable for various capacities · Reliable sludge setting · There are important system auxiliary parts · PLC control capability, data transfer, measurement of oxygen content and …. · Separation of impurities from inlet wastewater to protect system technology · Elimination of collection equipment from septic tanks · No need for sludge preconditioning due to the simultaneous stabilization of sludge in the SBR reactor |
Application | · Wastewater treatment on site · For commercial use · Office buildings · Hotels · Biodegradable industrial wastewater treatment · Suitable for units with very variable wastewater flows If the components are cementitious for 51-400 people, and if the cement tank is used for 51-5000 people. |
3-2. Systems without electrical equipment inside the SBR tank
The system generally works using compressed air. The pumps used in this system also work by the air compressor. Blowers cause aeration to the sewage treatment system.
Outlet wastewater quality | · COD: mg/lit 90 · BOD: 20 mg/lit · Ammonium: mg/lit 10 · Nitrogen: mg/lit 18 · P: optional |
Advantages | · A simple and strong system for implementing standard processes · The system works fully compressed air. · Simple and economical · PLC control capability, data transfer, measurement of oxygen content and … |
Application | · Wastewater treatment of multi-household houses · For commercial use · Office buildings · Suitable for wastewater treatment with a constant flow rate. · If the components are cementitious for 51 to 650 people, and if the cement tank is used for 51 to 1000 people. |
SPINAS works with the approach of delivering services and effective and efficient solutions in supplying and equipping waste water treatment and recycling technologies.
In 1392, the company started its business in commerce. Since 2014, the focus has been on special technologies … Read More
