Petrochemical wastewater treatment package

Before we discuss the Petrochemical Wastewater Treatment package or PCWW, let’s have a brief definition of the petrochemical industry and then we will discuss the various sources of petrochemical wastewater. Petrochemical is an industry that produces various chemical products with the help of raw materials from oil and gas. Due to such activity, it produces very dangerous chemical and toxic substances, which will cause irreparable damage to the lives of animals and humans if old methods of petrochemical wastewater treatment are used.

Various chemical substances and compounds such as Plastics, polyethylene, ammonium nitrate, It forms heavy metals, urea, organic and inorganic acids, and petrochemical waste soot they give In the past, when today’s technologies did not exist, petrochemical wastewater They directly entered the environment and buried. After that, other technologies emerged that They were more efficient, but they were not able to treat petrochemical wastewater completely Do high efficiency. But today, there is progress in the field of petrochemical wastewater treatment A lot of good things have happened. purification process Petrochemical wastewater is divided into two parts (mechanical and physical separation and then methods Chemical-biological for the production of activated sludge and purified water) which is also activated sludge Fertilizer and fuel production is a downstream process.
New technologies for industrial wastewater treatment petrochemical As we said, for petrochemical wastewater treatment Very good developments have emerged since the beta stage or have passed an experiment and are being done in most developed countries are. Also, fortunately, developing countries have entered into these issues to some extent are
Examples of technologies The new that was created for the treatment of petrochemical wastewater can be mentioned as follows: EFC method or Electroflotation: the scientific name of this method Electric flotation was first proposed by researchers at Gebze University in Turkey became. In this method, two electrodes (anode made of graphite and cathode made of stainless steel bell) is used. Then the conditions of voltage 12 volts and current 5 Up to 15 mA during 2 to 20 hours Minutes are established, which finally removes turbidity, removes phenol and hydrocarbon.
EC method or Electrocoagulation: a scientific method that is also called electrical coagulation. the door This method uses iron and aluminum electrodes. Voltage conditions and The flow is exactly the same as the EF method, but the required time is between 1 and 10 minutes Is. The purpose of applying the EC method as a new technology in the treatment of petrochemical waste precisely It is similar to the EF method, but it has better efficiency.
Ozonation and BAC: BAC (Biological Activated Carbon) and also ozonation for Destruction of petrochemical materials that are resistant to decomposition are used They are also used to remove amino benzoic acid, wastewater containing ABS, phenol, etc.
Types of petrochemical industrial wastewater treatment Petrochemical wastewater treatment from 4 different stages and diversely formed. The purpose of doing them is the purification of petrochemical wastewater in a step-by-step manner It is the stage to get the highest efficiency. These steps are: Garbage: Garbage in Petrochemical wastewater treatment is considered the most basic stage, including pre-treatment they say At this stage, large and visible components with the help of scavenger equipment They are collected manually and mechanically in order to interfere with the components of the devices in the next steps do not create
Purification Preliminary: At this stage, in the treatment of petrochemical wastewater, it is called Primary Treatment is also called primary sedimentation, separation of sand by sand filters and removal of oil particles as well as primary removal Pollutants happen. Biological purification: at this stage with the help aerobic or anaerobic microorganisms and with the help of methods such as MBBR, IFAS and EAAS, which will be mentioned later We will have, organic and inorganic pollutants are removed to the extent of purification efficiency Petrochemical waste reaches over 80%.
  • Disinfection: in the last step before the purified water enters the spaces and fields For irrigation, etc., contamination by chlorine disinfectants or UV lamps, as well as ozonation They disappear. This method does not bring environmental risks, especially the purpose of Purified water during the petrochemical wastewater treatment process for irrigation of agricultural lands contains Edible trees.
The most important method Hi Wastewater treatment of petrochemical industries In this section, a brief and useful introduction of the most important method We provide petrochemical wastewater treatment, which is being done in accordance with the current methods of the world are and have good efficiency: Degreasing methods in wastewater treatment industrial CPI method Grease CPI or Corrugated Plate Interceptors Petrochemical wastewater treatment, where corrugated plates with an angle of 60 degrees are used. These pages from They are made of metal or fiberglass so that the solids settle in the form of sludge by establishing a slow flow and suspended substances such as fat and oil particles are placed on the surface. Then the sludge pump will collect and a skimmer collects suspended particles on top of the liquid.

API The American Petroleum Institute or API method is one of the old and relatively common methods in petrochemical wastewater treatment, which operates based on the standards of this institute. The most important difference with the CPI grease trap is that the tanks are rectangular and the solid and suspended particles of fat and oil are collected based on the specific weight, which of course is affected by the wind due to being open, and after settling each of the components from They separate from each other.

DAF, DAF or Dissolved Air Flotation degreasing method in petrochemical wastewater treatment, which is the newest and best known degreasing method, which is used not only to separate solid particles and oil and its suspended derivatives, but also to reduce the rate of various pollutant parameters such as BOD5 and COD decreases. In this method, high pressure air flow is injected into the water that needs to be treated as petrochemical waste water, and the suspended matter adheres to the air bubbles that are formed and quickly rises to the surface.

All these methods are among the best and most effective methods of degreasing in the treatment of petrochemical and other industrial wastes by Ati Sazan Arsham Sanat Group. It should be noted that Ati Sazan Arsham Sanat Company, having all the devices and equipment related to petrochemical wastewater treatment, is considered the largest supplier and provider of this type of service in the country.

Physical and chemical methods of purification Petrochemical wastewater In these methods, the same as sand filtration and separation Mechanical coarse solid particles as well as chemicals are used for disinfection which we explained earlier in the description of the types of petrochemical wastewater treatment. Biological purification methods MBBR method MBBR or Moving Bed Biofilm Reactor Purification of petrochemical wastewater through the injection of metal salts and a number of polymers to remove phosphorus And it is used to remove non-degradable solids. This method requires control and It has no special supervision and is self-regulating. The production volume of the sludge mass can be controlled in this treatment method. this The method is not vulnerable to environmental conditions and by removing phosphorus and nitrogen, water The final produced in the treatment of petrochemical wastewater after entering the lakes, etc. leads to Explosive growth of algae and so on will not be.

IFAS IFAS or Integrated Fixed-Film Activated Sludge method in petrochemical wastewater treatment with the help of activated sludge technology increases the efficiency of treatment even for downstream processes and its fixed film substrate is completely resistant to organic substances and hydraulic shocks. This method, in a way, is a combined method with the advantages of both, and the fixed film bed is placed inside the activated secondary sludge during the industrial wastewater treatment process.

EAAS is the EAAS or Extended Aeration Activated Sludge method in the treatment of petrochemical wastewater for those times when a much higher efficiency is considered from the purification and recycling of activated sludge by aerobic and biological methods, which consists of two stages. In the first stage, for the decomposition of sludge and also for the reproduction of bacteria, organic materials are decomposed, but their amount is small, therefore, in the second step, in order to provide energy, the bacteria not only decompose the sludge, but also use the organic materials of their structure and They occur almost simultaneously.

Membrane bioreactive or MBR method. Filtration and biological purification are formed in a combined way, which is the final quality effluent It has much higher and its equipment occupies much less space and sedimentation tank Secondary sludge is removed.

UASB UASB or Up-flow Anaerobic Sludge Blanket method works much more successfully in the treatment of petrochemical wastewater in removing BOD and COD, and more methane gas can be obtained from the recycling of activated sludge, and at the same time, a system to prevent the emission of odor is also considered for it. Is.