Biostat Package Sewage Treatment Plant Brochure from Tuke and Bell Ltd.

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BIOSTAT
PACKAGE SEWAGE TREATMENT PLANT

INTRODUCTION

Tuke and Bell is one of the UK’s leading manufacturers of sewage purification equipment with ninety years experience in design and production.

The latest computer aided design systems are used to produce a wide range of high quality equipment, serving the needs of both the water industry and domestic customers.

The Biostat supplements our well established larger range of R.B.C. package systems and is ideally suited for dealing with flows from: Domestic Dwellings, Restaurant's, Public Houses, Rest Homes, Camp Sites, Marinas, etc up to 110 population equivalent.

The complete treatment process takes place within a single enclosed package unit, which is usually installed below ground level. The system is designed to produce effluent to most consent level requirements.

OPERATING PRINCIPLES

The well-established aerobic biological process has been adopted, which comprises four zones:- Primary mixing zone, Screening zone, Biozone, Final settling zone.

A pumped or gravity flow of crude sewage enters the Primary mixing zone, which is of adequate size to cater for the usual variation in flows normally without the need for any external balancing system. Where high diurnal flows are to be considered an extra surge/balancing tank can be installed upstream of the Biostat unit.

A continuously pumped recirculation facility - incorporating a self entraining air eductor - enables the screened primary mixed liquor to be delivered to a distribution system and induces air to ensure the biological treatment takes place. The pump is situated in the Screening zone which has been designed so that the complete assembly can easily be removed for cleaning and inspection.

The distributed liquor percolates through the Biozone, then cascades on to the surface of the Primary mixing zone. The Biozone incorporates the Tuke and Bell "Sandex"Ž media packs of highly effective biological area and are rigidly supported above the primary mixing zone by tie rods.

By displacement the liquor is transferred into the final settling zone: the treated effluent discharges via a trapped outlet pipe to a water course or soakaway.

Adequate access and a desludging facility are provided. The system is quiet and well ventilated to minimise odour problems. Energy usage is low and hence cost of running is minimal.

SPECIFICATION

DRAWING ILLUSTRATES RANGE A & B ONLY

Model Type	Average Flow	BOD5 Applied Load	Weight Empty	Weight Full	Pump Rating	Pipe Size	BS6297 EP. Rating	Approx. External Dimensions (m)
Model Type	m³/day	Kg/day	Tonnes	Tonnes	kW	mm	Head	W	X	Y	Z
A	1.26	0.385	0.25	2.6	0.15	100	7	2.0	-	2.29	0.1
B	2.16	0.660	0.45	4.6	0.15	100	12	2.0	-	2.75	0.1

DRAWING ILLUSTRATES RANGE C TO J ONLY

Model Type	Average Flow	BOD5 Applied Load	Weight Empty	Weight Full	Pump Rating	Pipe Size	BS6297 EP. Rating	Approx. External Dimensions (m)
Model Type	m³/day	Kg/day	Tonnes	Tonnes	kW	mm	Head	W	X	Y	Z
C	3.24	0.990	0.70	6.75	0.15	100	18	2.86	1.86	2.6	0.55
D	4.32	1.320	0.85	8.6	0.15	100	24	3.56	1.86	2.6	0.55
E	5.40	1.650	1.1	10.5	0.15	100	30	4.26	1.86	2.6	0.55
F	8.10	2.475	1.5	15.0	0.3	150	45	2.76	3.16	3.3	1.2
G	11.70	3.575	2.0	22.0	0.3	150	65	3.66	3.16	3.3	1.2
H	16.02	4.895	2.7	29.0	0.3	150	89	4.66	3.16	3.3	1.2
J	19.80	6.050	3.25	35.0	0.3	150	110	5.56	3.16	3.3	1.2

Main tank and internal construction :	G.R.P. (in accordance with BS4994-1987).
Removable Screen :	Plastic mesh.
Distribution System :	G.R.P. adjustable cone and fibrous matting.
Biozone :	Tuke & Bell "Sandex"Ž vacuum formed polyethylene media with supporting tie rods.
Recirculation :	Submersible Pump with plastic pipework.
Access Manhole :	G.R.P.

Tuke and Bell reserve the right to modify the design or amend the dimensions in respect of any equipment described on this brochure.

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