Small Plant Details

Overview of Lilliput Sewage Treatment Small Plant

    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.               

    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.               

    3. INFLUENT CHARACTERISTICS 

 

                          

PARAMETER
UNIT
TYPICALVALUE
POPULATION
Pe
10
FLOW (ADWF)
l/d
2000
OA
mg/l
50
COD
mg/l
500
NH3
mg/l
30
           

4. PHYSICAL COMPONENTS - TECHNICAL DETAILS 

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

 

NUMBER 1
MATERIAL OF CONSTRUCTION LLDPE 
DIAMETER 1,1 m
TOTAL REACTOR VOLUME 1 kl
FILTER MEDIA AWW MARK TWO®
SPECIFIC SURFACE AREA 200 m2/m3
COD LOAD 1 kg/d
BLOWER TYPE Diaphragm
SLUDGE PRODUCTION 0.3 kgDS/kgCOD

           

4.2. Disinfection

Disinfection will be achieved by in-line chlorination or Ozonation of the treated effluent.

 

 

NUMBER 1
CHLORINE SOURCE CaHOCl
FLOW RATE 300 l/h
HRT (ADWF) 0,5 h

 

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.

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.

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