DOMESTIC SEWAGE TREATMENT SYSTEMS 50 Hz EDITION 03-2005 DEPURBOX SERIES

Domestic sewage treatment systems DEPURBOX Series MARKET SECTORS RESIDENTIAL APPLICATIONS • Disposal of domestic sewage where a public sewer system is not accessible. SPECIFICATIONS • Depurbox is a range of compact, • activated sludge treatment systems that enable discharge of domestic wastewater (greywater and blackwater) in accordance with EEC Directive 91/271. The treated effluent can be discharged directly into the sewer system or into surface water or the ground (subsequent to optional tertiary treatment). The system consists of: - a one-piece basin made of fibreglass-reinforced polyester...

DEPURBOX SERIES SPECIFICATIONS OPERATING PARAMETERS Unit of measurement Type of premises Number of inhabitants (Population Equivalent) Per capita water supply Daily discharge volume Total useful volume Primary settlement volume Oxidation-nitrification volume Secondary settlement volume Primary settlement time Secondary settlement time Settlement rising speed Average flow per hour Maximum flow per hour Pump power Daily organic load Volumetric organic load Supplied oxygen factor Organic pollution BOD5 concentration (outlet) Treatment efficiency up to litres/head/day m3 litres litres litres litres...

DEPURBOX SERIES DIMENSIONS AND VERSIONS MAXI DEPURBOX PRIMARY SETTLER IMHOFF TYPE INSPECTION AIR INTAKE TREATED SEWAGE OUTLET SEWAGE INLET SETTLEMENT SECTOR SECONDARY SETTLER SLUDGE RECIRCULATION SLUDGE DIGESTION SECTION MIXING AND AERATION PUMP OXIDATION SECTION VENTURI DIFFUSER PRIMARY SETTLER IMHOFF TYPE DEPURBOX DUO INSPECTION SEWAGE INLET AIR INTAKE TREATED SEWAGE OUTLET SETTLEMENT SECTOR SECONDARY SETTLER SLUDGE DIGESTION SECTION SLUDGE RECIRCULATION MIXING AND AERATION PUMP OXIDATION SECTION VENTURI DIFFUSER 5

DEPURBOX SERIES DESCRIPTION OF TREATMENT PROCESS CHAMBER PROCESS STAGE 1st: Imhoff tank REMARKS Primary settlement Suspended solids settle and accumulate on the bottom (sludge digestion) Anaerobic sludge digestion Sludge accumulates on the bottom and undergoes a slow process of anaerobic mineralization 2nd: biological reactor Biological treatment, oxidation and nitrification The sewage oxidation and nitrification processes takes place simultaneously through the inlet of atmospheric air via a Venturi system combined with the Domo 7 VX electric pump: the pump recirculates the sewage in the tank,...

DEPURBOX SERIES INSTALLATION EXAMPLE KITCHEN BATHROOM MANIFOLD INSPECTION WELL NOTES: • Adequate structure must be provided if the installation is to withstand foot traffic. • If necessary, a Singlebox or Doublebox-type lifting station can be installed downstream or upstream of the system. 7

DEPURBOX GLOSSARY TERM DEFINITION Population Equivalent (g BOD5 /head day) Amount of biodegradable organic substances that are discharged in one day, resulting from the normal activities of a person, such as the use of bathroom and kitchen. It is measured indirectly based on the quantity of oxygen needed to enable the bacteria to modify the biodegradable organic substances contained in the wastewater and render them harmless within a time span of five days (Biological Oxygen Demand 5 = BOD5). On the average, the reference value is 60 grams of oxygen per day. Daily organic load (kgBOD5/day) It...

TERM DEFINITION Secondary settlement time (hours) Minimum interval of time required for the completion of the settlement process. It can be calculated by dividing the secondary settlement volume by the average flow per hour. Settlement rising speed (m/h) Maximum speed of liquid passage through the settlement compartments or tanks in order to avoid any entrainment of sludge to the next compartment or tank. It is normally calculated by dividing the average flow per hour by the area of the settlement compartment or tank. Sludge digestion volume (litres) Volume of that part of the system where the...

RECYCLED PAPER ® Do it 100% LOWARA S.r.l. - 36075 Montecchio Maggiore - Vicenza - Italy - Tel. +39 0444/707111 - Telefax +39 0444/492166 - e-mail: [email protected] - http://www.lowara.com cod. 191004401 03/05