• Advantages of installations of a Yorsh type
• Main equipment
• Water quality performance
• Stations of a full biological treatment
• Distinction futures of Yorsh biological treatment facilities
• The design of a compact modular station of a Yorsh type, the Northern version

Technical data

Name of the installation	Produc-tivity*	Dimensions (m)	Construc-tion capacity (cu m3)	Weight of a station without water (T)	Weight of a station in operation (T)	Demand on raw materials and resources
						Heat (Kcal/hour)	Fixed electric power (kwt/hour)	Con-sumed electric power (kwt/hour)	Ser-vicing perso-nell
Yorsh-B-15C	15	6.0x9.0x5.55	251	20	50	9000	10	8
Yorsh-B-25C	25	6.0x9.0x5.55	251	20	50	9000	11	8
Yorsh-B-35C	35	6.0x9.0x5.55	251	20	50	9000	11	8
Yorsh-B-50C	50	9.0x9.0x5.55	302	25	97	11000	25	18
Yorsh-B-70C	70	9.0x9.0x5.55	302	25	97	11000	25	18
Yorsh-B-100C	100	15.0x9.0x5.55	553	40	155	19000	32	24
Yorsh-B-150C	150	15.0x9.0x5.55	553	40	155	21000	40	30
Yorsh-B-200C	200	15.0x9.0x5.55	605	46	194	21000	40	30
Yorsh-B-400C	400	15.0x12.0x5.55	805	63	387	28000	55	40
Yorsh-B-600C	600	15.0x15.0x5.9	1303	87	460	42000	65	50

Stations of full biotreatment of a Yorsh type are intended for deep treatment of domestic and close to it by structure industrial waste water. They provide the remaining concentrations of biogenic elements- the combinations of nitrogen in ammonium form and restored phosphates form according to permissible dumping norms for fish industrial ponds.

With rated outside air temperature till -60 Co;

Normative snow load till 320 Kgs/sq.m;

Fast wind pressure till 55 kgs/sq.m;

Seismic activity till magnitude 9.

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• High detaining activity of attached biomass conditioned by a considerable figure of specific area of the inert filler surface;
• Functional simplicity;
• Low hydraulic resistance and durability of loading;
• Intensification of the treating process of sewages;
• Possibility of decreasing of free-floating biomass concentration, increasing of the sludge age and improving of its sediment characteristics;
• Stability of biological work of constructions under fluctuations of hydraulic loadings, concentrations of biogenic elements and temperature;
• Even filling of bioreactors by biomass
• High technological working stability of biotreatment constructions without sludge wastes, with minimum remaining concentrations of suspended elements, minimum duration of putting of treatment constructions into a programmed technological regime.
• Simplicity of operation of the equipment of biotreatment stations in general, low costs of current repair;
• Low costs for modernization of existing sewage treatment constructions.

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• Filtering device self purifying FDSP
• Neutralizer
• Distribution tray
• Combined settling aero tank
• Bioreactor of posttreatment
• Bactericide installation
• Contact tank
• Sludge concentration tank- stabilizer
• Sludge filter SF
• Flocculants preparation installation
• Sewage pump stations
• Sewage supply pumps
• Pure water supply pumps
• Compressor

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General operation principles of full biotreatment stations of a Yoursh type

The treatment of sewages by constructions with the not big productivity under conditions of the Far North has its specific peculiarities. The reason of it is that all the elements of technological equipment have to be placed indoors, whereas all the communications in the heated trestles. Compounding of the production building from modular containers, and if with productivity of 800 cu.m/day, from the metal constructions of a roll-type, unlike the traditional methods of equipment accommodation in the separate buildings, allows solving these problems to the most extent. With this, the operation costs on heating, ventilation and servicing of the station are reduced.

Aerobic stabilization of the formed sediment and its dewatering indoors allows rejecting the sludge platforms, what in its turn, according to buildings norms and regulations (BN and R 2.04.03-85) allows reducing the sanitary protective zone reducing at the same time the extension of communications.

The treatment station is to provide a high extent of purification, is to be simple and reliable, stable to the uneven inflow of sewages and not to be demanding for the high qualified service.

The method of bio aerobic treatment with the use of the inert carrier of biomass providing a deep extraction of polluting elements from the sewages, which is taken as a principle of the station structure, meets these requirements best.

To intensify the aerobic process, to destruct the impurities in the sewages and to increase the reliability of bioreactor's work the method of immobilization of microorganisms on the inert carrier- fiber synthetic loading of a Yorsh type is being used.

The application of FDSP allows excluding sand catchers and primary settling tanks from the scheme. Besides FDSP (Filtering device self purifying) allows purifying of sewages from fine dispersed floating dredges which are not detained by settling tanks. This has a positive influence on the work of a settling aero tank and of a post-treatment block.

The application of synthetic algae loading allows sustaining the concentration of active sludge within the required limits due to attached and orientated micro flora.

Under the uneven supply of sewages the loading stabilizers the work of the active sludge. Besides, the immobilization of microorganisms has a positive influence on formation of microorganisms' stamms, which are most adapted to a present kind of sewages. This allows strengthening the effect of water treatment and reducing the volume of a settling tank compared to existing analogies. When treating low concentrated sewages, the nutritives are adsorbed on the loading what creates premises for the stable work of active sludge and for a rise of the biomass. The dose of sludge in the aero tank makes up 1-5 mg/l.

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The combination of the aero tank and of the settling tank in one construction allows to reduce the overall volume of aero settling tank by 25-30% compared to the volume of traditional aero tanks and of secondary settling tanks.

The presence of a loading of a "Synthetic algae" type in the aero tank allows saving the active biomass in the aero tank under a volley dumping of toxic wastes, i.e. the operational regime of a settling aero tank is more stable to quantitative and qualitative changes of sewages coming to treatment compared to a traditional aero tank.

Under the uneven supply of sewages the work of the active sludge is stabilized by the loading. Besides, the immobilization of microorganisms has a positive influence on formation of microorganisms' stamms, which are most adapted to a present kind of sewages. This allows strengthening the effect of water treatment and reducing the volume of a settling aero tank compared to existing analogies.

The opportunity of increasing of quantity of the inert carrier of the biomass by more than 40% of the total volume of aeration part of the aero settling tank allows intensifying the treatment process of waste water, i.e. increasing productivity of facilities if necessary.

A self-oxidizing process of active sludge is happening in the usual aero tank if the sewage supply is stopped for a long period of time (power cut, accident in sewage pump stations. etc). This complicates very much the following launching of the aero tank into operation. In the analogical situation the aero settling tank is being partially emptied thanks to a submerged spill way and about a third of the loading appears to be in the open air. Thus, the active biomass is being saved. When the sewage supply is renewed the aero settling tank is immediately put into a technological regime.

The structural peculiarities of a settling zone of the aero settling tank allows excluding storing of surplus active sludge and its rotting, as well as reducing the volume of the construction. The technological process provides concentration of sediment in the aerobic stabilizer.

The structural peculiarities of a settling zone of the aero settling tank allows excluding storing of surplus active sludge and its rotting, as well as reducing the volume of the construction. The technological process provides concentration of sediment in the aerobic stabilizer.

In a settling tank the loading of a "Synthetic algae" type is being used instead of traditional thin layer modules. The synthetic algae prevent escaping of suspended active sludge from a settling tank, thus smoothing over the consequences of unevenness of hydraulic loading onto a settling tank.

The classical thin-layer modules have a considerable disadvantage in spite of their positive features - impossibility of full value regeneration of a module. Because of that the process of storing of sediment on the module walls and its rotting is taking place. The synthetic alga loading is easily accessible for visual observation and is easily regenerated when aeration ablution takes place.

The system of collection of settled water below the surface excepts the obstruction of a spill way.

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