Bio Plants For Sewage / Black and Grey Water

"High-Speed Bio Tec" Biological treatment plants. Advantages: extremely compact and efficient compared to regular systems, clog free, handles shock loading, extremely small footprint, ready to be operated. Fully automatic, skid - mounted, and 'up-front' central control. Please read General Description below

                                                Two High-Speed Bio Tec Systems Operating in Parallel

                                                      GENERAL DESCRIPTION

The High-Speed Bio Tec STP system is based on the "Moving Bed" (bio-film) biodegradation and sedimentation technology, which is unique due to its compactness and performance in respect of volumetric efficiency. These technologies are combined in a prefabricated; skid-mounted and standardized tank system with variable length, suitable for overseas transportation in ISO freight containers.

EEC Europe Ltd and DEVISE engineering S.A. can offer a number of standard models ranging from 60 to 400 m3/day divided into two formats:

SERIES 3 incorporate high rate bioreactors for efficient Carbonaceous BOD removal (85%) in a small 'compact' packaged plant.

SERIES 5 accomodate full nitrification - denitrification process with phosphorous removal as optional with removal rates > 90% all in containerised packaged plants.

Both SERIES 3 and SERIES 5 can be built in the MAXI FORMAT for both indoor and outdoor location. these systems offer maximum capacity and are built within the container that provides shelter for systems if placed outdoor.

The SERIES 3 and 5 can also be constructed in the COND FORMAT, which is built to fit inside standard ISO container and are more suitable for indoor location. Clients can also buy container optional and keep the ystem outdoor. Both systems are extensively aerated and produce no odour.

Note: If placed indoor, in closed rooms, draft ventillation is recommended.

 

1.  DIMENSIONAL CRITERIA

Any treatment plant should be based on actual measurements of the waste stream to be treated in respect of hydraulic load, suspended and dissolved organic material, and the applicable local effluent requirements. However sufficient statistical information is available for small community municipal wastewaters, related to the term "Person equivalents" Pe.

A system specifically designed for condominiums and smaller residential areas, this plant is based on the following data:

Wastewater flow            Qw           200 l/Pe/day

Suspended solids            TSS          70 g/Pe/day

Organic matter               BOD          65 g/Pe/day

Nitrogen                        N               9 g/Pe/day

Phosphorous                  P              .6 g/Pe/day

 

2.  CAPACITIES

The COND STP system is manufactured in lengths of 2 feet increment in order to suit any particular need. The basic 15', 21', 27', 33', 39' and 40' length systems with 3 chambers, have the following nominal capacities at a guaranteed effluent of 30 ppm BOD as a daily average.

MAXI 3 SERIES

MODELS	10ISO3	20ISO3	30ISO3	40ISO3	40MAXI3
Capacity m3.day	60	160	260	360	400
Capacity gpd	15800	42200	68600	95000	105600
Pe	300	800	1300	1800	2000
Tank L	10'	20'	30'	40'	40'
Tank W	8'	8'	8'	8'	8'
Tank H	8' 6"	8' 6"	8' 6"	8' 6"	9' 6"
AMB BIO MEDIA
Shipping Weight kg	2600	4000	5400	6800	7000
Operational Weight kg	18600	26000	40400	45800	58000

COND 3 SERIES

Models	15COND3	21COND3	27COND3	33COND3	39COND3
Capacity m3/d	120	180	240	300	360
Capacity gpd	31700	47500	63400	79200	95000
Pe	600	900	1200	1500	1800
Tank L	15'	21'	27'	33'	39'
Tank W	7' 4"	7' 4"	7' 4"	7' 4"	7' 4"
Tank H	8' 4"	8' 4"	8' 4"	8' 4"	8' 4"
AMB BIO MEDIA
Shipping Weight kg	3000	3800	4600	5400	6200
Operational Weight kg	19000	27800	34600	45400	55200

Systems with additional requirement to effluent removal on, COD, Ammonia, or Nutrient, will normally require longer retention time and will consequently have lesser capacity then above.

Effluent parameters such as BOD <25 ppm, TSS <30 ppm, TN <15 ppm can be achieved in the SERIES 5 systems as shown in the following table. Other systems can be designed to suit each customer's requirements. 

MAXI 5 SERIES

 

COND 5 SERIES

Model	15COND5	21COND5	27COND5	33COND5	39COND5
Capacity m3/d	77	116	174	192	230
Pe	385	580	770	960	1150
Tank L	4.6	6.4	8.3	10.2	12.0
Tank W	2.2	2.2	2.2	2.2	2.2
Tank H	2.5	2.5	2.5	2.5	2.5
AMB BIO MEDIA
Shipping Weight kg	3350	4150	4950	5750	6550
Operational Weight kg	19350	28150	34950	45750	55550

3.  PRE-SEDIMENTATION SYSTEM

It is assumed that the sewage piping system ends in a customer provided three-chamber combined settling / buffer / pump well tank system, which separates paper, sanitary binds and settleable solids. The buffer capacity must be sufficient to level out the daily peak flows. DEVISE can alternatively supply fully automated packaged Head-works combining fine screening, grit and grease removal.

4.  BIOLOGICAL TREATMENT SYSTEM

The treatment plant will take suction from the pump-well by its own feed pump. the pump is level controlled and has a capacity, which is 2-3 times the average daily flow. the plant has therefore an intermittent working mode in terms of hydraulic flow, while the air blower supplying air to the bioreactors is continuously running.

The biodegradation reactor comes in one or two stages depending on the required cleaning efficiency. Plants with higher cleaning efficiency than 80-85 % and the need for nitrogen & ammonia reduction will require a further aerobic reactor for nitrification and an anoxic reactor for the denitrification. The bioreactors are degrading the dissolved organic matter by oxidation into carbon dioxide, which escapes to the air, and to biomass that acts as activated sludge. The anoxic reactor is situated in the inlet of the plant where the mixed liquor is recycled and nitrates are converted to nitrogen gas with the aid of carbon from the influent. A suspended free-floating biofilm carrier medium is providing a large, protected biofilm surface for the bacteria and is simultaneously accumulating the active biosludge inside the reactors.

5.  SLUDGE SEPARATION SYSTEM

The biodegraded water is flowing into a clarification stage where the suspended solid settles by gravity. The water is directed through a skim-well to a plate settler system, which provides the final clarification of the effluent.

The sludge pump is activated each time the feed pump stops, with suction from the clarification stage. the pump is discharging through a Hydrocyclone with the overflow back to the bioreactor, while the underflow is discharged to the primary sludge storage. When necessary, the sludge is emptied by a vacuum truck and hauled away for external disposal. Alternatively EEC Europe & Devise engineering can supply suitable sludge handling and dewatering systems and equipment.

6.  EQUIPMENT SPECIFICATION

The basic system comes with the following standard equipment:

• A mild steel tank consisting of a framework of square hollow sections and vertically stiffened sides and partitions. The tank is internally coated with tar epoxy and externally painted to the clients preferred colour. Additional FRP lining can be provided as an optional.
• A free-floating plastic biofilm carrier medium in each bioreactor. 50% filling rate as standard with 850 m2 total surface / m3 of reactor volume and 500 m2 protected biofilm surface per m3 of reactor volume.
• A plate separator or tube settler system of 60 degree inclined in the settling tank accelerates the separation procedure.
• One regenerative blower with air header in galvanized steel and air distribution system in galvanized or stainless steel. Air filter / silencer on the blower inlet.
• A submersible sewage feed pump with an open impeller and a positive displacement pump for the sludge handling with waste water pipes in galvanized steel or PVC as available.
• A horizontal centrifugal pump for the mixed liquor recycling.
• Chemical dosing pumps of membrane type will be supplied wherever required.
• One main electrical switchboard / control / panel with start / stop push buttons and running lights controlled by a fully programmable PLC system.