Industrial Membrane Bioreactors (MBR) Brochure

DYNATEC SYSTEMS INC. The Wastewater Membrane Specialist 909 Jacksonville Rd · Burlington, NJ 08016 · 609-387-0330 · 609-387-2060 fax · dynatecsystems.com HIGH QUALITY DISCHARGE AND REUSE FROM MBR Dynatec Provides Reuse Water for Cereals Plant Dynatec Systems, Inc. has installed a water reuse system in a major cereals plant in Georgia, USA. The complete treatment system, consisting of a membrane biore-actor (MBR), followed by reverse osmosis (RO), provides a net savings to the plant of more than $3,000 per day in water and sewer charges after deduction of the plant operating costs. The water is reused for cleaning, in scrubbers and in boilers. Previously, the facility dis-charged all of the wastewater to a municipal treatment plant at a rate of up to 0.5 mgd, and paid both volume and load charges Quality Criteria Since the plant produces a food product, ultimate water quality is vital. The two-stage membrane system (MBR + RO) and final sterilization with ultraviolet (UV) treatment pro-vides the quality assurance that plant management requires. In addition, the membranes used in the MBR system are external to the aeration basin, and are tubular. This type of membrane is much less susceptible to failure that the immersed type. System Design After a review of the available treatment options, the owners of the facility settled on the Dynatec Hi-Rate Bioreactor option. This process combines aerated biological treatment with an out-of-basin ultrafiltration (UF) system. In combination with reverse osmosis treat-ment, Dynatec was able to provide the client with the necessary assurances that the water quality would not be compromised, and that the water would be suitable for process pur-poses, such as boiler feed water. Dynatec’s design consisted of the following components: • Internally-fed rotary screen • 500,000 gallon above-ground stainless steel equalization tank with coarse bubble aera-tion and duplex PD blowers • 500,000 gallon above-ground stainless steel aerated biological reactor with jet aeration and triplex PD blowers • Four membrane skids with a common automated CIP (clean-in-place) system, one skid operates in standby mode. • Reverse Osmosis system Significant Savings • Waste stream reduction lowers discharge fees • Water reuse reduces overall consumption • Easy maintenance avoids labor costs and regulations Technology Benefits Membrane bioreactor system using Tubular Ultrafilter (UF)Membranes • Simple mechanical process • Consistent high quality water • Ability to reuse purified water • Low operating costs • Unattended operation • Minimal disposal costs Contaminants Removed • Solids and high concentra-tions of organic contami-nants, including vegetable oils Services Provided • Systems Design • Equipment • Operator Training Equipment Shown The end of the module shows the membrane tubes potted in epoxy. This construction is extremely rugged, and pro-vides a module with a long life Continued... Wastewater Treatment Building at Saddle Ridge Four membrane skids provide redundancy • Final UV (ultraviolet) sterilization. • Sludge dewatering decanter centrifuge. • Completely integrated control system managing all system functions. System Advantages: The system provides many advantages for the operators and owners • Redundant membrane skids for ease of operation and cleaning. • Simple automated cleaning operations with membranes in place. • High mixed liquor concentra-tion ensures lowest possible sludge production, and re-quires smallest possible foot-print. • Simple, low maintenance system. • Long-lasting tubular mem-branes with 0.03 µm mem-brane, ensuring removal of bacteria and viruses. Results: The system has produced high quality water for reuse. Consistently, the water quality from the MBR has been as follows: Analyte Units Influent MBR Effluent BOD5 mg/L 1200 <5 COD mg/L 1500 20 TSS mg/L No data ND State Award In 2008, the facility received an award from the State of Georgia Association of Water Pro-fessionals presented an award to the facility for Outstanding Operation of a facility in the category of Water Conservation. Project Conclusion: The project was completed on time and within budget, and has exceeded the estimates that were initially made for cost savings. The Dynatec system has proved reliable and effi-cient, and has exceeded the customer’s requirements, based on the initial projected per-formance. Technology Benefits Biological treatment using Membrane Bioreactors pro-vides a number of benefits: • Consistently high quality wa-ter • No upsets, since the mem-brane provides a positive barrier to bacteria and vi-ruses • Smaller footprint than con-ventional systems, due to operation at high levels of mixed liquor • Better system kinetics than conventional systems, due to long sludge age • Complete removal of bacteria and viruses. • High quality water for reuse. Dynatec Out-of-Basin MBR Systems: • Operators never come in contact with biomass • Easy clean-in-place without moving membranes • Various system types avail-able, depending on require-ments. Aerated Reactor, EQ and reactor blowers and jet pump Dynatec personnel assembling a reverse osmosis system.