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Klarning

ENVIRONMENTAL TECHNOLOGY FORTREATING WASTEWATER INSCATTERED SETTLEMENTS

ENVIRONMENTAL TECHNOLOGY FORTREATING WASTEWATER INSCATTERED SETTLEMENTS

2.

4K

P11

P2

PPP

ILMLM

Sludge treatment

Waiting period

Biochemicalpurification

Clarification

K

P11

P22

PPP

ILMLM

K

P11

P22

PPP

ILMLM

K

P11

P22

PPP

ILMLM

tel int. +358 400 912 111tel int. +358 400 912 111WWW.RAITA.COMWW.RAITA.COMAstrakanintie 194, FI-05200 Rajamkistrakanintie 194, FI-05200 Rajamki

Ankkuritie 2, FI-21590 Karunankkuritie 2, FI-21590 Karuna

PA biochemical treatment plants

- Small houses, holiday homes Page 2

- Shared treatment plants Page 3

- Village treatment plants Page 4- On-site photos Page 5

- Company presentation, alternative systems Page 6

PA biochemical treatment plantsSmall houses, holiday homes Page 2Shared treatment plants Page 3Village treatment plants Page 4 On-site photos Page 5

- Company presentation, alternative systems Page 6

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RaitaORIGINAL

TECHNOLOGY

ENVIRONMENT

C


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Best technology (BAT) for scattered settlements sewage treatmentest technology (BAT) for scattered settlements sewage treatmentRAITA PA batch treatmentAITA PA batch treatment

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The PA compact treatment plant isinexpensive to install and use in areasof scattered settlement.

The PA compact treatment plant isinexpensive to install and use in areasof scattered settlement.

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It makes use of a biological active sludge process to remove organicmaterial, biological nitrification and denitrification to remove nitrogen,and biological treatment and chemical precipitation to removephosphorus.

A standard feature of the PA treatment plants is self-regulating operation based on load,including reminder and alarm functions (inspection or service alerts), a batch counter, andprogramming backup in case of power outages. Other features are described in thetreatment plant instructions.

The treatment effectiveness is 90% for organic load (BOD) and phosphorus (P), 50% fornitrogen (N). The effectiveness of a PA compact treatment plant meets the most stringentrequirements of the new decree for areas of scattered settlement (1.1.2004). In addition tobeing effective, wastewater treatment with a PA compact treatment plant is an inexpensiveway to treat wastewater in areas of scattered settlement.

Usage costs are affected by the sludge processing method as well as by loading. The sludge

is be treated with long-term oxygenation to minimize produced volume. The cost of using atreatment plant for a single household varies between 0.90 euro/m3 and 2 euro/m3 (200-500 /year) The cost includes electricity, chemical, sludge treatment and maintanence cost.

Excess sludge produced by the plant can be removed by tanker lorry 14 times per year. Theplant can also be equipped with extra tank for sludge which lengthens the emptying intrevalto 1-2 years.

The sludge can alternatively be treated with airation and drying in a gatering bin so that it canbe emptied from the bin into a composter and used on the property. In this case, a tankerlorry is not needed to dispose of the sludge.

The treatment plant is equipped with automatic aeration and circulation functions that areactivated during periods of interrupted use. This allows for an interruption as long as 30 days.If nutrients are added monthly, the treatment plant can go for even longer without being used.

It makes use of a biological active sludge process to remove organicmaterial, biological nitrification and denitrification to remove nitrogen,and biological treatment and chemical precipitation to removephosphorus.A standard feature of the PA treatment plants is self-regulating operation based on load,including reminder and alarm functions (inspection or service alerts), a batch counter, andprogramming backup in case of power outages. Other features are described in thetreatment plant instructions.The treatment effectiveness is 90% for organic load (BOD) and phosphorus (P), 50% fornitrogen (N). The effectiveness of a PA compact treatment plant meets the most stringentrequirements of the new decree for areas of scattered settlement (1.1.2004). In addition tobeing effective, wastewater treatment with a PA compact treatment plant is an inexpensiveway to treat wastewater in areas of scattered settlement.Usage costs are affected by the sludge processing method as well as by loading.

Excess sludge produced by the plant can be

The sludge can alternatively be treated with airation and drying in a gatering bin so that it canbe emptied from the bin into a composter and used on the property. In this case, a tankerlorry is not needed to dispose of the sludge.The treatment plant is equipped with automatic aeration and circulation functions that areactivated during periods of interrupted use. This allows for an interruption as long as 30 days.If nutrients are added monthly, the treatment plant can go for even longer without being used.

The sludgeis be treated with long-term oxygenation to minimize produced volume. The cost of using atreatment plant for a single household varies between 0.90 euro/m3 and 2 euro/m3 (200-500 /year) The cost includes electricity, chemical, sludge treatment and maintanence cost.

removed by tanker lorry 14 times per year. Theplant can also be equipped with extra tank for sludge which lengthens the emptying intrevalto 1-2 years.


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Automatic treatment funcions

All wastewater from the property is conveyed to the treatment plant. The first tank is for the preliminary treatmentof wastewater, acting as a collection and equalization chamber. The treatment plant monitors wastewater inflowby sensing the surface level in the first tank, and automatically adjusts function according to load fluctuations.

Pumping from the first chamber, i.e. the pre-treatment tank , takes place automatically when the surface sensorlevel (PS) has been reached. The equalization storage in the pre-treatment tank is the volume difference betweenPS and the overflow port . When treatment is in progress, the full chamber volume is available to receive

incoming wastewater.

The P1 pump with a large inlet size pumps the wastewater periodically into the other tank, i.e. the process tank.Fine bubble aeration of the wastewater in the process tank ( begins at the same time. During aeration, the airpump pumps air through tubing into the fine bubble aerator. The treatment processes that successively take placein the process tank are biological treatment, nitrification, chemical addition, clarification and denitrification.Duringaeration, the active sludge in the tank is mixed with the pre-treated wastewater, which starts the biologicaltreatment as microbes in the active sludge consume organic substances. Nitrification happens at the same time,changing the state of nitrogen. At the end of the aeration period, a chemical dose from the chemical tank (20 L) isadded to the wastewater by the chemical dosage pump and reacts with phosphates. Air pumped into the waterexits the treatment plant through the drain ventilator to the roof of the building.

Aeration is followed by the clarification period, during which active sludge precipitates to the floor of the processtank and nitrogen is removed by denitrification. The chemical that reacted with phosphates precipitates to the floorof the tank at the same time.

After the clarification period has ended, the "clarified liquid", or treated water, is removed from the tank by the P2pump. The water can be discharged into a ditch or absorbed by the ground through a simple gravel bed.As the clarified liquid is pumped out, some of it is automatically collected into a separate monitoring dish througha tap along the way. The effectiveness of the treatment plant can easily be verified from the monitoring sample.At the end of a processing period, a small amount of excess sludge is automatically removed by the PP pump anddeposited into the sludge collection and composting basket (20 L) . At the bottom of the basket, compost bulking

material is used so that the treated sludge can be emptied for composting, or a filter bag is used to collect thesludge for waste disposal.

Another option is to have the sludge removed by tanker lorry 14 times per year.

The control and alarm centre, fan, chemical dosage pump and tank, and pump controls are situated in themechanical space. An alarm is triggered by malfunctions (mechanical problems or bypasses). A GSM alarmcentre forwards alarm information to the selected GSM phones as text messages (ancillary equipment). Thealarm centre can also be connected to an alarm system in use for the property.

All wastewater from the property is conveyed to the treatment plant. The first tank is for the preliminary treatmentof wastewater, acting as a collection and equalization chamber. The treatment plant monitors wastewater inflowby sensing the surface level in the first tank, and automatically adjusts function according to load fluctuations.Pumping from the first chamber, i.e. the pre-treatment tank , takes place automatically when the surface sensorlevel (PS) has been reached. The equalization storage in the pre-treatment tank is the volume difference betweenPS and the overflow port . When treatment is in progress, the full chamber volume is available to receiveincoming wastewater.The P1 pump with a large inlet size pumps the wastewater periodically into the other tank, i.e. the process tank.Fine bubble aeration of the wastewater in the process tank ( begins at the same time. During aeration, the airpump pumps air through tubing into the fine bubble aerator. The treatment processes that successively take placein the process tank are biological treatment, nitrification, chemical addition, clarification and denitrification.Duringaeration, the active sludge in the tank is mixed with the pre-treated wastewater, which starts the biologicaltreatment as microbes in the active sludge consume organic substances. Nitrification happens at the same time,changing the state of nitrogen. At the end of the aeration period, a chemical dose from the chemical tank (20 L) isadded to the wastewater by the chemical dosage pump and reacts with phosphates. Air pumped into the waterexits the treatment plant through the drain ventilator to the roof of the building.Aeration is followed by the clarification period, during which active sludge precipitates to the floor of the processtank and nitrogen is removed by denitrification. The chemical that reacted with phosphates precipitates to the floorof the tank at the same time.After the clarification period has ended, the "clarified liquid", or treated water, is removed from the tank by the P2pump. The water can be discharged into a ditch or absorbed by the ground through a simple gravel bed.As the clarified liquid is pumped out, some of it is automatically collected into a separate monitoring dish througha tap along the way. The effectiveness of the treatment plant can easily be verified from the monitoring sample.At the end of a processing period, a small amount of excess sludge is automatically removed by the PP pump anddeposited into the sludge collection and composting basket (20 L) . At the bottom of the basket, compost bulkingmaterial is used so that the treated sludge can be emptied for composting, or a filter bag is used to collect thesludge for waste disposal.Another option is to have the sludge removed by tanker lorry 14 times per year.The control and alarm centre, fan, chemical dosage pump and tank, and pump controls are situated in themechanical space. An alarm is triggered by malfunctions (mechanical problems or bypasses). A GSM alarmcentre forwards alarm information to the selected GSM phones as text messages (ancillary equipment). Thealarm centre can also be connected to an alarm system in use for the property.

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Collective wastewater treatment considerably

reduces wastewater treatment costs for scattered

settlements. The acquisition price per property

decreases, as does the cost of using the treatment

plant. Treatment plant loading is also more

uniform.

Collective wastewater treatment considerablyreduces wastewater treatment costs for scatteredsettlements. The acquisition price per propertydecreases, as does the cost of using the treatmentplant. Treatment plant loading is also moreuniform.

We have supplied numerous village treatment plants for the needs of 5200properties.

At the larger sites, the treatment plants are often supplied under a unified contractincluding design, equipment delivery and installation, start-up, and user training.

A village treatment plant is a simple and cost-effective wastewater treatment solution.The costs of installation and use per property are low.

Pressure drainage and pump stations are often used to lead wastewater to the treatmentplant in the most cost-effective way.

All models can be supplied with the sludge processing system, enabling sludge to beused in an environmentally friendly way.

We have supplied numerous village treatment plants for the needs of 5200properties.At the larger sites, the treatment plants are often supplied under a unified contractincluding design, equipment delivery and installation, start-up, and user training.A village treatment plant is a simple and cost-effective wastewater treatment solution.The costs of installation and use per property are low.Pressure drainage and pump stations are often used to lead wastewater to the treatmentplant in the most cost-effective way.All models can be supplied with the sludge processing system, enabling sludge to beused in an environmentally friendly way.

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Containerized sewage treatmentsystem

Additional information can be found at .www.raita.comdditional information can be found at www.raita.com.

Raita-bacth treatment modells

PA0.6MULTI PA2MULTI PA4MULTI PA6MULTI PA8MULTI

Volym/ d 800 1150 3000 4500 6000

max volym with storagetank/ d 1200 1725 4500 6750 9600

Persons 6 9 25 37 50

Families 1 2 5 7 10


5/6

K

P11

P22

PPP

ILMLM

PA0.6MULTI BIOCHEM palnt + HS inflitrationfiedl 2,4 m2

380 l storage tank

Kerysputki 110 mm

Tasaussili

Sm150 suodatuslevy

Ylivuotoputki 110 mm

Lmperistys 50 mm

16-32sepeli

Suodatuskangas

PA treatment plant can easily be installed in a small place. Surfacearea needed for PA0.6

and PA 2 MULTIi is only 1x 2 m.

PA treatment plant can easily be installed in a small place. Surfacearea needed for PA0.6and PA 2 MULTIi is only 1x 2 m.

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Representative:

Ree

av

environment RAITA technology

is a family business specialized in environmental technology.

The products and processes developed by the company are based on a

long experience in the field of environmental technology. Starting fromequipment for clean water treatment in the beginning of the 1950's, thecompany has expanded its activities to wastewater treatment systems inthe 1960's, biological WC-systems in the 1970's and composting systemsin the 1980's. In addition to the sale of individual products, we supply totalsolutions to the most demanding applications.

Today we offer state-of-the-art solutions in the field of environmental

technology for rural wastewater treatment, WC and composting systems.Our products represent the most advanced development in the field,offering efficient and reliable solutions for today's needs.

environment RAITA technologyis a family business specialized in environmental technology.The products and processes developed by the company are based on along experience in the field of environmental technology. Starting fromequipment for clean water treatment in the beginning of the 1950's, thecompany has expanded its activities to wastewater treatment systems inthe 1960's, biological WC-systems in the 1970's and composting systemsin the 1980's. In addition to the sale of individual products, we supply totalsolutions to the most demanding applications.Today we offer state-of-the-art solutions in the field of environmentaltechnology for rural wastewater treatment, WC and composting systems.Our products represent the most advanced development in the field,offering efficient and reliable solutions for today's needs.

Ankkuritie 2, FI-21590 Karunatel 0400 912 111 tel int +358 400 912 111Ankkuritie 2, FI-21590 Karunatel 0400 912 111 tel int +358 400 912 111 Astrakanintie 194, FI-05200 Rajamkistrakanintie 194, FI-05200 Rajamki

RaitaORIGINAL

TECHNOLOGY

ENVIRONMENT

CWWW.RAITA.COMWW.RAITA.COM

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english_sewage_treatment_plants