DEPURBOX
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DOMESTIC SEWAGE TREATMENT SYSTEMS DEPURBOX SERIES

Domestic sewage treatment systems DEPURBOX Series MARKET SECTORS RESIDENTIAL APPLICATIONS • Disposal of domestic sewage where a public sewer system is not accessible. • 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 resin; -...

DEPURBOX SERIES BASIC DEPURBOX SLUDGE RECIRCULATION SEWAGE INLET _ PRIMARY SETTLER _ PRIMARY SLUDGE DIGESTION SECTION TREATED SEWAGE OUTLET OXIDATION SECTION SECONDARY SETTLER MIXING AND AERATION PUMP _VENTURI DIFFUSER

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

DEPURBOX SERIES DESCRIPTION OF TREATMENT PROCESS CHAMBER PROCESS STAGE 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, sucking in air from...

DEPURBOX SERIES INSTALLATION EXAMPLE INSPECTION WELL DEPURBOX ft • 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

DEPURBOX GLOSSARY TERM 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...

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...

LOWARA S.r.l. - 36075 Montecchio Maggiore - Vicenza - Italy - Tel. +39 0444/707111 - Telefax +39 0444/492166 - e-mail: mkt@lowara.ittind.com - http://www.lowara.com