/ Marley MARPAK® Modular Biomedia /
The Marley® MARPAK Difference SPX Cooling Technologies is a world leader in the design, manufacturing and construction of cooling products. The design and production of modular corrugated PVC media used in Marley cooling products is the same technology and expertise utilized in the development of the MARPAK product line of modular PVC media for biological wastewater treatment.
Fixed Film Process Relative Energy Consumption 1 Influent & Intermediate Pumping 2 3 4 5 6 7 8 10ft. Total Head 30ft. Total Head 100ft. Total Head Preliminary Treatment Primary Treatment Secondary Treatment The advantage of the trickling filter process over other methods of treating wastewater include: Activated Sludge Incineration 1. Lower energy consumption (Fig. 3-1) 2. More resistant to hydraulic and organic shock loads 3. Simple operational procedures 4.
Modular Biological Treatment Media MARPAK is a modular PVC corrugated media specifically designed for biological treatment applications. MARPAK media is manufactured from rigid PVC sheets that are UV protected and resistant to rot, fungi, bacteria, acids and alkalies commonly found in wastewater. MARPAK modules are manufactured in various sheet thicknesses to meet specific structural requirements.
MARPAK MXF Series MARPAK MXF Series incorporates the well established 60° cross-corrugated (cross flow) design (Fig. 4-1). This geometry has proven to be the most efficient for reducing BOD (biochemical oxygen demand) and for nitrification. Typical applications are shown in Figure 5-1. MXF Series media is available in modules 2 ft wide, 2 ft or 4 ft high and 4 ft or 6 ft long.
General Design Information Municipal Wastewater Industrial Wastewater Numerous empirical equations have been developed in an attempt to mathematically describe the reaction taking place in the trickling filter. The most common and generally accepted empirical equation in use today for predicting trickling filter performance in secondary treatment applications is the modified Velz equation. MARPAK MXF Series media performance for secondary treatment (Figs.
Applications Upgrading Existing Rock Trickling Filters MARPAK MXF 4800 with its 60° cross fluted geometry and high surface and void ratio is ideal for upgrading the performance of existing rock trickling filters. With a surface area and void ratio more than three times greater than rock, upgrading with MARPAK MXF 4800 can more than double the organic capacity and improve effluent quality of an existing trickling filter.
Applications Complete Secondary Treatment Complete Secondary Treatment Primary Clarifier MARPAK MXF Series fixed film biological reactors used in conjunction with primary and secondary clarification (Fig. 8-1) can reduce BOD5 and suspended solids to above 90%. Trickling Filter/ Solids Contact (TF/SC) BOD –20 SS –20 MARPAK Reactor Secondary Clarifier 8-1 The TF/SC process utilizes the trickling filter followed by short term aeration (Fig. 8-2).
Applications Effluent from Secondary Treatment Nitrification BOD<15 SS<15 NH4N<1 BOD-30 SS-20 NH4N-25 Nitrification In the nitrification process (Fig. 9-1) MARPAK MXF Series fixed film reactor provides an effective means of oxidizing ammonia nitrogen of secondary treated wastewater. MARPAK Nitrification Reactor Nitrifying trickling filters require less mechanical equipment, less operating power and less attention than the activated sludge process (Fig. 9-3).
The MARPAK Advantage MARPAK Advantages Fixed film media has traditionally been made in 2 ft height increments due to production limitations (sizes of thermoformers and molds to create the media sheets). Marley cooling tower fill has been produced for over 30 years and the advantage of taller fill heights has been recognized. This has resulted in the development of larger thermoformers to product fill media up to 6 ft tall. Taller heights of 4 ft (MXF 4800 and MXF 3000) and 6 ft (MCR 3100).
General Specification and Installation Information Media Installation MARPAK is a Modular PVC media specifically designed for fixed film biological treatment applications. MARPAK is installed so that the sheets of all modules in a particular layer are parallel. MARPAK is available in both the highly efficient 60° cross flow design (MXF Series) for complete secondary treatment and nitrification and the vertical flow design (MCR Series) for treating high strength industrial wastewater.
7401 WEST 129 STREET OVERLAND PARK, KANSAS 66213 UNITED STATES 913 664 7400 spxcooling@ct.spx.com spxcooling.com In the interest of technological progress, all products are subject to design and/or material change without notice. ©2008 SPX Cooling Technologies, Inc.
