EKOflow

1 Automatic chain screen

EKOflow COR 1

Basic measures

QMAX	Maximum channel flow	3000 L/s
WMAX	Maximum channel width	3,0 m
HMAX	Maximum channel height	10,0 m
S	Light opening between screen bars	6 - 150 mm

Application:

• For mechanical pretreatment of wastewater/rainfall water, removes all particles larger than the wanted clear width between screen's bars immersed into the water, installation in channels.

Working principle:

• Device is installed into channel and heavily reinforced at the bottom and at the channel sides. Bottom part of device, immersed into the channel, consists of grid bars with specific clear width, and several driven sprockets. Rubber routers are installed on the front side of immersed part in order to direct water flow.
• On the upper part of device, on the drive axis, there are driving sprockets equiped with electric drive with reductor. On the rear part of the device there is an output outlet through which the collected material comes out and falls into the waste container or in the spiral transporter with press machine
• Sprockets are using rotation driving the chain, on which one or more combs are articulary placed. On the upper trajectory, comb together with chains travels along the screen and lifts accumulated solid material to comb cleaner placed at the top of device. Scraper pulls down the collected material from the comb, and lets it out through the outlet. After comb cycle is finished, comb is stopped in its initial position till the next automatic start.

2 Automatic coarse rotation screen

EKOflow COR 3

Basic measures:

QMAX	Maximum channel flow	2400 L/s
DMAX	Maximum drum diameter	2,8 m/s
WMAX	Maximum channel width	3,0 m
HMAX	Maximum channel height	3,0 m
S	Light opening between drum bars	6 - 10 mm

Application:

• For mechanical pretreatment of wastewater/rainfall water, removes all particles larger than the chosen plates on the drum
• The device is multifunctional: its collects, transported and in the drain unit, it drains water from the collected waste.

Working principle:

• On the internal side of the static drum waste water flow accumulates bulk waste which is stuck to drum's plates. Rotation comb lifts the accumulated material up and throws it into the basin, and the material falla on the opened lower end of the spiral. Next the waste is using spiral rotation transported to the draining zone, where it is pressed and drained and then on the exit it is ejected through an outlet into the container for solid waste.
• Clean water is brought on the pressing zone, cleaning the sludges which remained after the pressing process. Cleaned sludge is drained back to the channel using pipes.

3 Schaftless screw press

EKOflow COR 7

Basic measures:

Maximum device lenght without drive: L_MAX=10 000 mm

Q	Material flow capacity	2 m3/h	5 m3/h	8 m3/h
D	Schaftless screw diameter	190 mm	280 mm	380 mm

Application:

• For transporting and pressing-draining different kinds of solid and wet waste material
• It is installed on the outlet of the devices which have just separated solid material from the waste waters (for example, on the coarse screen outlet)

Working principle:

• The device consists of two main parts, amission and material transport zone, and draining-pressing zone. Material transport is conducted using shaftless spiral driven by an appropriate electric drive with reductor.
• By rotating the spiral, material is translated and pressed into the pressing zone, where the water is drained through a perforated sieve. At the end of the zone, there is a rotational lid with weights, which regulate the degree of pressing-draining.
• On the outside of the sieve rinsing is conducted in the pressing zone using water nozzles and the rinsed sludge is brought to the lower starting part of the basin and is discharged through the outlet.
• At the exit of pressing zone there is usually waste container used to collect solid drained material.

4 Coarse manual screen

EKOflow COR 9

Basic measures:

WMAX	Maximum channel width	2,0 m
HMAX	Maximum channel height	2,0 m
S	Screen lamella light opening	20 -100 mm
α	Slope toward the horizontal axis	30 - 60°

Application:

• Manual coarse screen consists of bar screen placed in the open channel. Placed that way, the screen represents an obstacle to all floating solid waste that remains on the screen. Collected material is manually removed using supplied rake.
• This kind of device is suitable for waste water treatment systems and for installation into bypass channels or into channels in front of device where bulk waste material can cause device malfunctioning.

Working principle:

• Screen bars, with specific clear width between bars, are obliquely placed into channel with the bottom end onto the basic slab at the channel bottom, and with the upper end on the waste container board. Waste water flow brings solid material on to the immersed screen. The waste remains on the front part of the screen if it is of larger dimensions than clear width between screen bars.
• After sufficient quantitiy of waste material is collected on the screen, operator pulls the material to the screen top and throws it into container placed at the top of channel using rakes. Container posesses a perforated bottom for material draining. Container discharge is conducted by operator, manually, and it is usually discharged into municipal container.

5 Automatic fine rotation screen

EKOflow FIN 1

Basic measures:

QMAX	MAXIMUM CHANNEL FLOW	2400 L/s
DMAX	MAXIMUM DRUM DIAMETER	2,8 m
WMAX	MAXIMUM CHANNEL WIDTH	3,0 m
HMAX	MAXIMUM CHANNEL HEIGHT	3,0 m
S	LIGHT SPAN BETWEEN DRUM BARS	1 - 6 mm

Application:

• For mechanical pretreatment of wastewater/rainfall water, removes all particles larger than the chosen plates on the drum.
• Device is multifunctional: collects, transports and drains water form the collected waste in the pressing zone.

Working principle:

• On the internal side of the rotating drum waste water flow brings bulk waste which remains on the drum plates, on its internal side. By rotating, the drum lifts the waste on its upper side.
• On the upper side, just behind the drum, there is a spray lath with nozzles. Spray lath is connected to clean water supply using electromagnetic valve. Water flow from nozzles takes off the collected waste material and throws it towards the drum center into the open basin placed on the lower part of the spiral.
• Spiral transports water to the pressing-draining zone, where, after the water is separated, waste is being removed from the device, usually discharged to the municipal container for solid waste.
• Clean water is using electromagnetic valve introduced into the pressing zione and it rinses the sludge made by pressing the material. Rinsed sludge is drained with a pipe and returned back to the inlet of the device.

6 Automatic fine screw sieve

EKOflow FIN 3

Basic measures:

QMAX	MAXIMUM CHANNEL FLOW	150 L/s
WMAX	MAXIMUM CHANNEL WIDTH	0,9 m
HMAX	MAXIMUM CHANNEL HEIGHT	2,0 m
S	TROUGHT-SIEVE PERFORATION SIZE	3 - 6 mm

Application:

• For mechanical pretreatment of wastewater/rainfall water, removes all particles larger than chosen perforation (clear width between plates) basin-sieve device.

Options:

• Depending on the installation angle, we can differentiate:
  - Aslope construction – usual installation angle 30-40°
  - Vertical construction – installation angle 90°

Working principle:

• Waste water flow brings waste material onto the sieve. Material remains on the sieve if its size is larger then the clear width of the sieve. Spiral rotation transports waste upwards to the draining-pressing zone where, after water is separated, it is being discharged from the device, usually to the municipal container for solid waste.
• Clean water that rinses the sludge made when material is being pressed is brought to the pressing zone. Rinsed sludge is drained back into the channel through a drain pipe. Clean water is through the nozzles also used to wash out the lower part of the spiral with sieve in the channel.

7 Septic tank receiving station

EKOflow COR 5

Basic measures:

Q	FLOW DEVICE CAPACITY	20 - 100 L/s
D	DRUM DIAMETER	0,6 - 0,8 m
S	DRUM BAR LIGHT OPENING	6 - 10 mm

Application:

• Purpose of this device is to accept content from municipal vehicles that are emptying septic tanks
• Device is multifunctional: separates, transports and drains water form the solid waste in the pressing unit

Working principle:

• Waste from the municipal vehicle enters the closed tank. Waste water flow brings solid waste to the bars on the internal side of the drum.
• Rotating comb lifts up the collected material and throws it into open basin on the lower part of the spiral
• By rotation, spiral transports waste, along the spiral housing, to the pressing zone, where the material is pressed-drained. After that, on the upper part of the spiral, material is discharged through the outlet into the municipal container.
• Clean water is brought, over the electromagnetic valve, to the pressing zone in order to rinse the sludge arising from material pressing. Rinsed sludge is drained through the pipes and led back into the device housing. Using the second electromagnetic valve, over the drum a nozzle is installed in order to wash out the lower parts of device, drum with comb with clean water.

8 Sand classifier

EKOflow SAN 1

Basic measures:

Q

Device flow capacity

10 L/s

20 L/s

35 L/s

50 L/s

Application:

• Used for small solids (sand) separation from sediment extracted from sand trap tanks.

Working principle:

• Waste water along with sediment solids (usually from sand trap tanks) enters the first chamber of the device, at the bottom of which there is aslope installed spiral. Sediment i.e. sand is settled down at the bottom of the chamber, and the spiral is used to transport it to the top of device, from where drained sand enters the municipal waste container.
• Treated waste water overflows into the second chamber and flows back into system (sand trap tank or channel)

9 Sand washer

EKOflow SAN 2

Basic measures

Q

Flow rate

10 L/s

20 L/s

30 L/s

Application:

• Used for small size solids (sand) separation from sediment, extracted, from sand trap tanks

Working principle:

• The fluidized mixture of wastewater and sand enters through the inlet connection at the top of the device. The integrated mixer functions to separate the sand from the water and organic particles. The separated sand falls downward and settles at the bottom, where a spiral installed at an angle transports it upwards towards the top of the device and ejects it after draining. The spiral rotates in a lining-coated trough, which is easily replaceable.
• The treated wastewater exits through one outlet connection and returns to the system, while the separated organic particles exit through a separate outlet connection equipped with an electric motor valve.

10 Longitudinal sand/grease trap tank scraper

Basic measures:

• All measures of device parts are calculated from construction measures of the sand/grease trap tank, which are obtained from calculation of approximate waste water that will be processed.

Application:

• These devices are standard equipment for sand/grease trap tanks and are used for collecting small solids (sand) that is settled down at the tank bottom, on one side, and floating materials and grease on the surface of waste water.

Working principle:

• Longitudinal sand/grease scraper is a bridge structure that moves along the tank using rails. Two scrapers are installed on the bridge, first collecting solid sediment i.e sand on the bottom of the tank, and the other one collecting floating materials and grease on the surface of waste water.
• Collected sand on one side of the tank is lifted up using vacuum pump up to the sand classifier, while on the other side collected grease is pushed into channel with longitudinal (chain) grease scraper used to eject grease form the channel into aspecial tank or ditch.

11 Compact pretreatment unit

EKOflow COMP

Standard sizes:

Q	PRETREATMENT UNIT CAPACITY	10-200 L/s
AMAX	MAXIMUM LENGHT	18050 mm
FMAX	MAXIMUM WIDTH	1750 mm
BMAX	MAXIMUM HEIGHT	5400 mm

Application:

• Unit is predicted for the purpose of separating particles in a mechanical pretreatment.
• By selection of the appropriate unite, effective separation of the fine impurities from the waste water is enabled, after which thus impurities are extracted into the waste containers,.
• Standard device is dimensioned to extract at least 90% of inorganic particles larger than 0,20 mm.

Construction:

• Depending on the required function, unit is delivered in two standard versions, EKOflow COMP1 which is equipped with an automatic fine sieve to extract solids and sand trap to extract sand and other solid particles, and EKOflow COMP3 which is additionally equipped with a grease trap to extract fat and other floating substances.

Operation principles:

• Waste water is transported to unit either by pump or gravity. Fine sieve separates all fine particles larger than the size of sieve perforations. Separated material is lifted by the shaftless spiral and is washed accordingly
• Thus purified wastewater flows to settling tank where the sand and other solid particles are settled to the bottom. If necessary, the air is inserted into wastewater to improve the effect of sedimentation. Shaftless spiral transports sand and solids particles to the receiving chamber from which it is drawn through the elevated conveyor. Thus separated sand and other solid particles are lifted, drained and if necessary washed
• In case of unit equipped with grease removal, the wastewater passes through an additional chamber which separates grease and other floating substances.

12 Lifting screen

EKOflow COR 15

Basic standard sizes:

DMAX	Opening diameter	1000 mm
HMAX	Installation depth	6,0 m
S	Screen bars clear opening	20 -100 mm

Application:

• Lifting screen consists of a basket equipped with screen bars which is usually installed at the waste water inlet. Installed screen is an obstacle for all solid waste contained in sewage water and therefore waste remains on the screen. The collected waste is manually disposed by raising the screen and opening of swivel doors.
• This device is suitable for sewage systems, and in particular to be installed in pumping tanks where waste material can lead to malfunction in pump operation. Of course it is possible to apply it to other facilities in the sewage systems (shafts, etc.).

Operation principle:

• Screen bars, with the specific clear opening between the bars, are arranged vertically in relation to the incoming water flow in a semicircular arrangement. On such mounted screen waste water flow brings solid waste. The waste remains on the inside of the screen if it is larger than the clear opening between the screen bars, and falls into the lowered part of the basket.
• Once sufficient amount of solid waste is accumulated on the screen, operator simply pulls the basket out through the chain and the guide, and discharges screen by opening of swivel doors.