SESSIL TRICKLING FILTERS

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1 SESSIL TRICKLING FILTERS 8 6'-6" = 52'-0" mm ~ mm 13'-0" 13'-0" 3962 mm 3962 mm 10'-9 1/4" TYP 10'-9 1/4" TYP 3283 mm 3283 mm INTERMEDIATE EL 117'-3 1/2" [35751 mm] 4'-3 1/4" 1302 mm 1 1/4" GRATING 16'-6" 5029 mm 11'-0" 3353 mm DOWN 52'-0" mm 13'-0" 3962 mm TYP DET A W8X48 (TYP INTERIOR) 1'-4" 406 mm SESSIL WEIGHING SYSTEM. REF: DRAWING NSW-AES-SPC-001 1'-4" 406 mm 1'-4" 1'-4" 406 mm 406 mm DOWN C10X15.3 W10X12 C10X15.3 W8X10 W10X12 C10X15.3 W8X10 W10X12 2'-9" 838 mm 2'-9" 838 mm 7'-6" 2286 mm 125'-11 1/4" [38386 mm] 13'-0" 3962 mm TYP DETAIL D W8X31 (TYP EXTERIOR) [37440 mm] (EL 122'-10") W8X10 (EL 125'-10") [38354 mm] TYPICAL U.N.O. (TYP EXTERIOR) U FRAMING PLAN (T/STL EL 122'-10" [37440 mm] UNO) JAEGER ENVIRONMENTAL Superior Performance By Design

2 Sessil Trickling Filter Media Sessil trickling filters are proven performers for WWTP upgrades and new construction. Sessil plastic vertical strip media is specifically designed for trickling filter applications. Sessil has been in use for over 20 years and is installed in over 100 facilities. With a history of success treating high strength industrial wastewater and typical municipal wastewater, Sessil is ideal for reducing soluble BOD concentrations by up to 90%. Sessil systems offer a broad range of benefits, including extremely low operational and maintenance costs, low construction cost, improved process control and stability, and lower sludge production. Compared to suspended growth wastewater treatment processes, trickling filter benefits include: More energy efficient Reduced O&M costs Robust process, more resistant to organic and hydraulic shock loads due to high biomass concentration Simple operation and maintenance Sessil Trickling Filter at a beverage plant in Wilson, NC. This 30 ft diameter trickling filter has a 20 ft bed depth and treats wastewater with an average influent BOD concentration of 3000 mg/l with peaks of over 6000 mg/l. 2

3 Sessil Trickling Filter Media Sessil is a plastic vertical strip media specifically designed for biological wastewater treatment applications. Sessil media consists of high density polyethylene strips, overhanging a support board. The ironwood board and UV protected strips are resistant to rot, fungi, bacteria, acids and alkalines commonly found in wastewater. Unlike other trickling filter media, Sessil has no inverted surface areas that may not be wetted and no packing interfaces. Typical Applications: Food Processing Distilleries Pulp / Paper Municipal Beverage Plants Pharmaceutical Chemical Aquaculture Sessil Trickling Filter Media benefits vs. Modular PVC Media Eliminates packing interfaces where solids (biological and gross) can accumulate Sessil strips operate in tension instead of compression like PVC media. This eliminates the possibility of media collapse. UV stabilized high density polyethylene for long life No gluing or adhesives required (no VOC issues) Durable working deck created by support boards No grating required to walk on media Lower installation cost, only one cut required to fit corner areas versus modular media which requires cutting for each layer Compresses to ship more economically Sessil weighing system indicates operating weight ideal for optimizing performance Media shipping and handling is minimized with Sessil which is strapped into bundles at the factory. These bundles contain ft 3 and are unloaded and lifted into the trickling filter by crane, using factory applied straps. No loading of individual modules onto lifting platforms. 3

4 Sessil Trickling Filter Construction Construction of Sessil trickling filters is quite different from PVC modular media or random dump trickling filters. Sessil vertical strip media hangs on boards at the top of the trickling filter. This allows the support structure for the tower to be located at the top. The top-mounted support structure holds exterior paneling, eliminating the need for concrete piers in the bottom of the filter. The Sessil design also allows for uninhibited airflow to the media and microorganisms. Sessil Trickling Filter Construction typically consists of the following: Concrete Base / Ringwall Galvanized Steel I-Beam Support Structure Each Sessil support board spans across the horizontal I-beams Sessil media attached to durable support boards which create secure working platform I-beams are typically placed on 2.0m or 6-6" centers Horizontal girts around the perimeter for attaching Fiberglass Paneling Structure designed to support rotary distributor Rotary Distributor is typically motor driven to provide maximum process control Fiberglass Paneling manufactured of UV stabilized FRP, in choice of colors to create a visually appealing building Access doors of fiberglass, aluminum or stainless steel for access to bottom of trickling filter Vents or fans to provide airflow for optimal biological treatment Ladder or staircase to access the top of the trickling filter Galvanized steel support structure with fiberglass paneling attached. Sessil media spans across horizontal beams in foreground. Fiberglass Paneling attached to the galvanized steel support structure provides an appealing structure and an economical solution. FRP Paneling is available in custom colors. Large vent openings and air plenum at bottom of trickling filter provide unimpeded airflow to the microbial population. 4

5 Sessil Trickling Filter Design Considerations Sessil Trickling Filter Sizing: Type of wastewater Wastewater Characteristics (Flow, Concentrations, Temperature) Effluent Requirements (BOD Removal) Extensive piloting and data collection is conducted to provide Jaeger Env l engineers with proper design loadings for full scale Sessil trickling filters A computer design program is applied to create a quick preliminary sizing and budget pricing for each application Structural Considerations Structures designed for 20 lbs/ft 3 Seismic zone and wind loads Wastewater constituents may dictate materials of construction for support structure Site constraints may determine ideal diameter and bed depth For media replacement projects, Sessil support structure is designed to fit inside existing tankage without adding any load to existing walls. Sessil Pilot Plants are available for testing. Typical Framing Plan for a Sessil Trickling Filter. For this drawing, the media would span the W16x31 I-beams. Typical Sessil wall detail. Drawing shows an outer wall where the FRP paneling would attach. A typical door and vent opening is also shown. 5

6 Applications Roughing Process Roughing or pretreatment Sessil media efficiently pretreats high strength wastewaters, reducing the BOD concentration and load to subsequent processes. A Sessil trickling filter system is idea whether roughing the wastewater (Figure 6-1) for treatment by secondary biological processes or pretreating the wastewater for discharge to a local municipality (Figure 6-2). Sessil trickling filters also cool high temperature wastewaters found in pulp and paper mills, chemical plants and some food processing plants. This cooling allows secondary biological processes to be more efficient. Figure 6-1 Pretreatment Process Figure 6-2 TF/SC Process Trickling filter/solids contact (TF/SC) The process of trickling filter/solids contact (TF/SC) combines the trickling filter with a short-term aerated contact basin (Fig. 6-3). When sludge from the secondary clarifier recirculates to the aerated contact basin, the agglomeration of fine particles occurs, improving settling characteristics. The TF/SC process can readily achieve a 95%+ reduction in BOD 5 and total suspended solids. Figure 6-3 6

7 Weighing Systems Single Board Weighing System offers economical means to monitor the operating weight of the Sessil media. This information can be used to adjust rotary distributor speed, recycle rates, airflow rates and nutrient addition to maintain optimal performance. A multi-board weighing system is also available. These units typically weigh up to 500 cubic feet and provide a more accurate operating weight for the media. The weighing system incorporates a frame which is mounted to the horizontal support beams. The unit is hinged on one side and rests on a load cell on the other side. Sessil trickling filter at Winstone Pulp International, Ohakune, New Zealand. This 75 ft diameter trickling filter was installed in 2001 and treats in excess of lbs/d of BOD. Sessil Single and Multi-Board Weighing Systems. Cost effective solution to monitor trickling filter operating weight. Notice the ideal working platform created by the Sessil support boards. A Sessil Weighing System can be seen at the bottom of the photo. Ventilation Depending on the application, natural draft ventilation provides adequate airflow for the trickling filter. Also shown here is the concrete ringwall. For forced draft ventilation, fans are installed at the base of the biotower. Internally, either a deflector plate or ductwork is required to ensure proper air distribution. 7

8 Jaeger Environmental offers the most complete line of trickling filter media. In addition to Sessil trickling filter media, we offer Bio-Pac SF#30 random dump media and Dura-Pac PVC modular media. Nor-Pac tower packings for air scrubber/stripper applications, Kompakt tubular block media, Kontakt MBBR media, and Copasac screening systems are also offered. Bio-Pac SF #30 Kompakt Dura-Pac Kontakt Nor-Pac Copasac Jaeger Environmental 1121 Richmond St. (Physical) P.O. Box 240 (Mailing) Selma, VA Phone: Fax: Corporate Offices Jaeger Products, Inc Peachleaf St. Houston, Texas Fax: RASCHIG GmbH Mundenheimer Strasse Ludwigshafen - Germany Phone: Fax: hneis@raschig.de Locations/Production Sites Ludwigshafen and Espenhain, Germany Houston, Texas El Dorado, Kansas Monterrey, Mexico Represented by: