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| Small Plant Details |
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| 1. PROCESS SCOPE |
| The LILLIPUT SEWAGE TREATMENT PLANT MODELS SBC2000 and SBC6000
treat domestic sewage from the septic tank of a single house unit.
The treated effluent is discharged to garden for irrigation. |
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| 2. PROCESS DESCRIPTION |
The sewage from the septic tank of a single house unit is pumped
at a constant rate to the LILLIPUT BIOREACTOR. The effluent enters
the bio-reactor below the AWW MARK TWO fixed-growth media where it
mixes with an air diffuser. The effluent then rises through the media
where the microbial population attached to the media removes and aerobically
degrades the organic material contained in the aerated effluent. A
degree of nitrification takes place in the upper layers of the media.
Once it has passed through the media, the treated effluent is pumped
through a disinfecting contactor and discharged to the garden for
irrigation.
The disposal of the treated effluent by irrigation is totally safe
and helps to conserve water 100% recovery for re-use. |
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| 3. INFLUENT CHARACTERISTICS |
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| PARAMETER |
UNIT |
TYPICALVALUE |
| POPULATION |
Pe |
10 |
| FLOW (ADWF) |
l/d |
2000 |
| OA |
mg/l |
50 |
| COD |
mg/l |
500 |
| NH3 |
mg/l |
30 |
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| 4. PHYSICAL COMPONENTS - TECHNICAL DETAILS |
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| 4.1. Up-flow Submerged Reactor: |
This aerobic biological treatment unit is based on the Submerged
Fixed Film principle. The plant utilises random-packed AWW MARK
TWO biofilter media which has a high surface to volume ratio
to permit a high biomass-density.
The LILLIPUT MODELS SBC2000 and SBC6000 can be located discreetly
above ground to reduce costs of installation, and can take on
the form of an aesthetically pleasing rock water feature or
wishing well.
Up-flow Submerged Reactor |
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| NUMBER |
1 |
| MATERIAL OF CONSTRUCTION |
LLDPE |
| DIAMETER |
1,1 m |
| TOTAL REACTOR VOLUME |
1 kl |
| FILTER MEDIA |
AWW MARK TWOŽ |
| SPECIFIC SURFACE AREA |
200 m2/m3 |
| COD LOAD |
1 kg/d |
| BLOWER TYPE |
Diaphragm |
| SLUDGE PRODUCTION |
0.3 kgDS/kgCOD |
|
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| 4.2. Disinfection |
| Disinfection will be achieved by in-line chlorination or Ozonation
of the treated effluent. |
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| NUMBER |
1 |
| CHLORINE SOURCE |
CaHOCl |
| FLOW RATE |
300 l/h |
| HRT (ADWF) |
0,5 h |
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| 5. SITE REQUIREMENTS |
| The only requirement for the installation of the model SBC1000 is
a 220 volt power supply. The treatment plant is easily installed with
simple plumbing requirements. |
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| 6. OPERATION AND MAINTENANCE |
The plant does not require continuous supervision and no maintenance.
All pumps are sealed units rated for continuous use. The chlorine
disinfection unit should be topped up intermittently to ensure optimum
efficiency.
All mechanical / electrical components are readily available off the
shelf from local shops.
All plant and equipment is supplied in non-corrosive or corrosive
protected material. As the entire plant can be constructed above ground
the necessity for extensive earth works and civil requirements is
curtailed. |
