Storm water treatment modern technologies allows you to remove the mechanical, chemical and other impurities contained in them, which can cause significant harm to the environment. One of the leaders in the Russian market of equipment designed for this purpose is Flotenk. We design, manufacture and install stormwater treatment plants for industrial enterprises, logistics and social and cultural facilities, private houses and cottages.
After mechanical cleaning waters are sent to the stage of biological treatment, respectively, to active aeration pools. Active mud ponds are structures in which biological aerobic water treatment takes place in the presence of a mixture of sludge and wastewater, which is constantly mixed and aerated. In active sludge pools, in addition to mixing and creating a mixture, the acceleration of the cleaning process is achieved by increasing the amount of drilling fluid, sending the so-called recirculating sludge to the pools, the result of decanting wastewater with an active solution, in secondary decanters.
To order and calculate a storm water treatment plant, send a request to E-mail: or call toll-free 8 800 700-48-87. Or fill in questionnaire:
Stormwater treatment plants from Flotenk: key benefits
We manufacture our stormwater treatment plants from durable and very resistant to chemical, biological and climatic influences fiberglass. Therefore, they are durable: their service life is at least half a century. Our company is developing treatment systems taking into account the specifics of those objects on which they will be applied, using various ways purification of industrial and storm drains. It should also be noted that since we are direct manufacturers of equipment, the price for it is the most acceptable for us. Request an installation quote.
Biomass has great importance during the oxidation of organic matter. The development of this biomass, ie membrane thickness and floc volume, must remain within certain limits. The amount of biomass retained in the installation depends on the hydraulic load on temperature, the size of the contact surface and the rate of oxygen uptake. Non-compliance with biomass between normal limits is carried out by its evacuation. In active mud ponds, the amount of biomass that is active can be adjusted as high or low as needed.
The need for stormwater treatment
Treatment plants and systems of our company separate all types of pollution, which are very rich in storm and melted wastewater. According to the rules and regulations in force in our country, these effluents can be discharged into environment only when the content of substances harmful to the environment and human health does not exceed certain standards. The equipment for the treatment of storm drains, which our company offers, allows you to guarantee that they will be brought to the required conditions. It should also be noted that untreated storm and melted wastewater is also dangerous for buildings and structures. The chemical impurities that they contain damage the waterproofing, resulting in the destruction of foundations, as well as underground engineering communications. because of high humidity fungus appears on structural elements, which causes them serious harm. Thus, it is necessary to treat stormwater not only because it is required by environmental regulators, but also for purely practical reasons.
The excess is sent to the primary decanters and from there it reaches the sludge fermentation pools. Each biological line has a parallelepiped aeration basin that operates by blowing air at low pressure and 80 cm below the water level.
Each biological line has a rectangular aeration basin divided into three aeration compartments, each containing four vats that operate in sequence. After crossing the aeration basin, the active mixture dirty water discharged from the end zone of the basin into the second decanter - one for each of the three aeration lines.
Stages of storm water treatment
Modern storm sewage treatment plants manufactured by our company remove harmful impurities in several stages:
- Separation of sand and others mechanical impurities;
- Cleaning of storm drains from oil products;
- Wastewater disinfection.
At the first stage of treatment, wastewater enters the sand separators. They are horizontally or vertically located reservoirs in which the flow rate of effluents slows down, and under the influence of gravitational forces, the mechanical impurities present in them settle to the bottom.
Secondary decanters are an important part of the biological treatment step aimed at keeping the sediment - a solid in a separable suspension by decanting. Sludge in secondary decanters has high content water, highly flocculated, easily and quickly decomposes. Therefore, sludge removal must be carried out continuously to ensure sufficient sediment in the aeration tanks, depending on the efficiency of the treatment.
Activated sludge deposited at the bottom of the decanters is lifted by pumping stations and reintroduced into production lines as recirculating drilling fluid and excess sludge before the main decanter to continuously maintain activated sludge with effective, in the decomposition of existing organic matter in sewage.
Further, wastewater is transferred to a device such as an oil and petrol separator. It separates emulsified oil products: they are concentrated into rather large drops and float to the surface, forming a film. As a result, the smallest particles of suspension also get into it. If a storm drains have an increased content of oil products, then the installation of a sorption unit is envisaged in the treatment facilities. Its main element is a carbon filter, which is used for post-treatment of wastewater.
The mixture of primary sludge and secondary sludge resulting from the primary decanter is pumped into the sludge treatment line in metaants. The limestone in the secondary decanter is driven by free fall directly into the Arges River. The treatment or disposal of sludge from municipal wastewater treatment plants, which is a significant amount of waste, mainly involves anaerobic fermentation of the sludge in order to remove the organic matter present in the sludge from the primary and secondary decantation of sewage, making it less harmful and easier to handle. during subsequent operations.
At the last stage, disinfection of storm drains is carried out. In the Flotenk treatment plant, special modules are used for this, following through which wastewater is irradiated with ultraviolet light.
In order to significantly simplify and facilitate the operation and maintenance of these equipment complexes, our company equips them with automated systems management of industrial storm water treatment. Most often they are used in wastewater treatment plants of large industrial facilities, cottage settlements, etc.
Fermentation produces mud with much less water compared to fermentation, resulting in lower volumes. Sludge from secondary decanters after active mud ponds is a flocculant and is dehydrated in outdoors even when stretched in thin layers. It breaks and the temperature is high. It can decompose in sludge fermentation pools, but it is usually mixed with sludge from primary decanters.
The sludge treatment line includes the following processes: thickening, stabilization, dewatering, final drainage. Sludge thickening should be done by gravity graders, one for the primary sludge and the other for the fermented sludge. The stabilization process consists in the controlled degradation of less stable organic materials in order to obtain an end product with a modified mineral ratio in which the remaining organic matter is more stable. This stabilization is carried out by anaerobic fermentation.
Used for purification of industrial, surface and waste waters. In accordance with the rules laid down in the law Russian Federation, before discharging rainwater or city sewer waste and contaminated water, it is necessary to carry out a number of special measures. Their ultimate goal is to bring the quality of the purified liquid to the established indicators.
This process involves the decomposition of organic substances contained in a mixture of primary sludge and secondary sludge in excess for fermentation by bacteria under anaerobic conditions. Sediment fermentation is carried out in two stages: acid fermentation and alkaline fermentation.
During acid fermentation, acid-producing acids decompose complex organic compounds into simple organic structures while development occurs. The main intermediates at this stage provide a substrate for bacteria that produce methane and carbon dioxide.
Application area
Types and size of systems
Conventionally, stormwater treatment plants can be divided into two categories:
- closed systems. This means that water flows through pipes and traps directly into the storm water inlet and is discharged through pipes to places where it is either discharged or stored.
- open systems. In this case, water accumulates and flows down the surface of channels and gutters to the places of its discharge.
Such treatment plant systems are most often produced in the form of horizontal tanks using various materials such as concrete, fiberglass, polyethylene low pressure or metal. As for their size, they directly depend on the area from which runoff flows, as well as on the weather conditions of a particular region, the places of discharge of treated water and the type of the object itself.
Two fermentation lines operate in parallel. The mixing sludge is necessary to bring the fresh sludge into close contact with the organisms in the cuttings that are being fermented and to prevent fresh drilling fluid from entering the fermentation space from the soil.
The sludge is mixed by recirculation with recirculation pumps. With simultaneous mixing, heating is also achieved by re-circulating the sludge through the heat exchangers. Temperature determines growth rate and ecological balance various kinds bacteria. The most important thing is to maintain a constant temperature. From the process of anaerobic fermentation of the sludge follows.
Usually a combination of a gas catcher and a sand trap is installed. Their sizes can be very different and for the convenience of their installation and delivery they are often placed in one housing. If wastewater is discharged into open water bodies, then in addition to sand and oil traps, coal purification units, i.e., sorption filters, are additionally used.
Mud fermented common solid. The evacuation of the fermented sludge is carried out after checking the degree of sludge fermentation, which determines the moment of sludge discharge at the drying sites. Sludge dewatering is carried out on drying beds, which include.
On drying platforms, sludge dewatering is carried out in two ways. By evaporation from above. Theoretically, after the sediment is discharged onto the platform, the resulting gases cause the formation of suspended solids on the surface, and relatively clear water at the bottom flows through the sand.
Systems and their passport
Block-modular storm water treatment facilities are made in the form of a special installation - a sand and oil trap. Through the hatches made in these containers, they are produced Maintenance. Passing through modular cleaners, they get rid of oil products and various kinds of mechanical impurities. The first of the above types of pollution includes sediment of conglomerates, film, primary and secondary emulsions, and the second includes hard-to-set particles, silt and sand with a density of more than 1500 kg / m, as well as debris that floats on the surface.
The heaviest sludge fraction is deposited practically at the bottom, which causes rapid clogging of the upper part of the sand layer, the remaining cleaned layer in depth. This plugging makes dewatering by sludge drainage much more difficult. Preparation of the layer for drying the sludge is as follows.
Remove the dehydrated sediment, rinse with a jet of water under pressure. Remove the clogged layer of sand, level. The final removal of the sediment is currently an unresolved problem. Currently, the dehydrated sludge is settled on land in a treatment plant. Consequently, a very small amount is used as agricultural fertilizer.
It should be noted that factory-made systems always have a passport for storm water treatment plants, certificates of conformity and sanitary and epidemiological conclusions. In addition, the manufacturer must give a guarantee for the tightness of the case. Usually it is 10 years.
The boiler uses biogas from sludge fermentation as fuel. The combustion gases are exhausted through two dispersion brackets of the same height, but with different diameters- one is 800 mm in diameter and the other is 000 mm. In the air: noise. Solids and large suspensions are preserved on rare and frequent grills.
Granular suspensions are stored in two dryers. Fats and oil products, divided into two floodplain and primary decanters. Primary sediment after stabilization. Waste: secondary sediment after fermentation stabilization. Physico-chemical characteristics of waste water and waste water.
What is an oil sand trap and how does it work
This product is a cylinder, often made of this gives it extraordinary strength, resistance to adverse external conditions and the ability to easily endure the influence of various aggressive environments.
The operation of the sand and oil trap consists of five stages of wastewater treatment:
The wastewater treatment plant treats the influent, which is a mixture of used industrial water from economic entities from the city of Pitesti, domestic wastewater from the city, as well as part of the water-melting water entering the Pitesti canal. The composition of these waters, especially from economic agents, affects the efficiency of treatment.
During the construction of the Pitesti wastewater treatment plant, the technological parameters for which it was calculated were. At the entrance to treatment plant Wastewater The amount of wastewater recorded using the Parshall flow meter varies with industrial and domestic wastewater spills from individual households driven by the city's drinking water program.
- Sump. At this stage, the primary rejection of large particles occurs, which, under the influence of gravity, fall to the bottom.
- thin layer module. It separates suspended solids, as well as their oil conglomerates into sediment, and the primary emulsion floats to the surface, merging into drops and collecting on hydrophobic plates.
- Sorption filter. Its task is to capture particles of oil products that did not fall on hydrophobic plates located on a thin-layer module. Sorption fibrous filler, which is located in the filter housing, is placed in a high capacity and has a significant selectivity for heavy, medium and light oil products.
- coalescent module. It contributes to the separation of particles of oil products that float to the surface, the size of which is greater than 0.2 mm.
- Coal filter aftertreatment. It is filled with a special sorbent, selective to all oil products.
Design
As you know, in the territories of enterprises and stand-alone gas stations, there is a constant accumulation of rain and melt water, which must be removed and discharged outside onto the ground or into any body of water. 
To determine which treatment facilities are needed, you need to know the following data:
The color of wastewater collected at the entrance to the station is yellowish, opalescent, and the smell is specific to households. Wastewater emissions from the treatment plant are discharged directly into the Arges River. Measures to improve wastewater treatment. Progress made in last years in the field of wastewater treatment and sludge treatment, has importance and makes a significant contribution to improving cleanliness and operational safety, reducing maintenance costs, energy consumption, operating personnel and improving the conditions of working personnel.
- uniformity and volume of wastewater;
- composition of impurities and effluents;
- options ground water and earth.
The design of storm water treatment facilities for production sites requires, first of all, to determine which group this object belongs to. There is a specially developed classification of NII VODGEO, dividing them into two groups. The first includes surfaces and enterprises, the effluents from which are similar in composition to the waters of residential areas. This means that they contain toxic and other specific elements.
Some of the more significant ones are listed. These setups actually replace frequent grills and remove occasional grills. They are made of corrosion-resistant materials with spacings of 0.25 to 12mm, low installed power, and are easy to install and operate.
The operation is automated depending on the load loss in the grid. They can be installed indoors or outdoors, in which case they are protected by thermal insulation. These two technological facilities are named in a unique design, saving space, investment and operating effort. He has increased efficiency both in sand and in fat retention, compared to classic solutions with independent objects.
The second group includes those territories of enterprises from which surface runoff with similar harmful impurities. After that, the type itself is chosen, and at the end, calculations are made and suitable stormwater treatment plants are determined.
Necessary Calculations
Calculations differ from each other depending on the specific selection of components. When using a flow circuit without the use of an equalizer, the structure is selected by determining the flow rate of storm drains. For this you need to know statistical characteristic rain in a certain locality, as well as the coefficient SNiP, which determines the surface of the waters. When the calculation of stormwater treatment plants is ready, they finally choose suitable model systems.
The evacuation of sand and grease from the plant can be fully automated. Besides, in special installations sand can be washed with fine organic particles and can be used for various purposes: structures, fillings, road and allelic foundations, etc.
At present, almost only scrubbers are used in the world - ventilated fats, and very rarely only small wastewater treatment plants prefer classic solution with independent entities. It is best suited for distributing water to many similar facilities. This type of distribution is the simplest, safest, and does not require human intervention. In addition, this type of distributor shows low load losses and avoids the formation of sludge in the plant.
Performance
It should be noted that the efficiency of the facilities is very important, since untreated melt and storm water can be extremely dangerous both for buildings and structures, and for the entire territory of the enterprise. Harmful chemical impurities contained in wastewater can damage waterproofing, and this is fraught with the destruction of foundations and engineering underground utilities. Moisture, accumulating on structural elements, contributes to the appearance of fungus, which in turn can cause irreparable harm to them. Therefore, the efficiency and performance of stormwater treatment plants is very important, not only because of the fact that it is required by environmental authorities, but also, by and large, based on practical considerations.
Systems installation
There is a certain order in which the installation of treatment facilities. First of all, with the help of equipment or manually they dig several trenches and pits required size. Sometimes, if necessary, their bottom is concreted. After that, all cleaning components are installed in places previously prepared in an appropriate way, and then the structural elements are insulated and waterproofed. Final stage work is backfill soil.
It should be noted that the successful design of treatment facilities largely depends on the correctness of the necessary analyzes, research and calculations, since even a small error can contribute to the flooding of the site and the breakdown of the treatment system itself.
