in construction costs. Another benefit is the low maintenance of the system and its ability to accommodate the future growth of the resort.
Strict Effluent Requirements Achieved with Extended Aeration Wastewater Treatment System at Lauloa Maalaea Resort in Maui, Hawaii With stringent effluent quality requirements and limited space on site at the Lauloa Maalaea Resort in Hawaii, the engineer specified an Extended Aeration package wastewater treatment plant. To meet the new regulatory requirements and the design flow of 21,000 GPD the extended aeration process selected for this system utilizes aeration followed by clarification and disinfection. The flow equalization chamber receives the incoming wastewater, then duplex pumps discharge the wastewater into the aeration chamber. Duplex positive displacement blowers and an air distribution manifold system supply the air needs to the system including air diffusers, airlift pumps, and a scum skimmer. The hopper-style clarifier has baffling to prevent short circuiting and to provide the maximum uniform solids settling area. The settled sludge returns from the clarifier floor sludge well to the aeration chamber by the positive sludge return system. Immediately following the clarifier is a plug flow chlorine contact chamber. The influent characteristics were typical domestic waste loadings, with effluent requirements of less than 20 mg/L BOD/TSS. Conclusion In conclusion, decentralized wastewater treatment systems, combined with advanced treatment technologies can provide a practical and efficient solution for overcoming difficult site conditions. By addressing challenges such as high-water tables, tight soils, and strict effluent concentration limits, these systems ensure effective treatment, protect water resources, and meet regulatory requirements. Incorporating advanced treatment technologies offers environmental and economic benefits, making decentralized wastewater treatment an attractive option for areas with challenging site conditions. Moving forward, continued research and innovation in decentralized wastewater treatment technologies will further enhance the efficiency and effectiveness of these systems, ensuring sustainable water management practices for present and future generations as well as the availability of clean water. Ashley Donnelly, Technical Training and Sales Development Manager , has a pas - sion for building relationships within the onsite wastewater treatment industry through training and technical education. Ashley entered the industry over 20 years ago and works to preserve the environment through sound wastewater treatment solutions. In her position at Infiltrator Water Technologies (IWT), she manages the Inside Sales Team and is responsible for maintaining and building customer relationships. This involves assisting engineers, contractors and regulators with technical and design information, training, installation, and operation and maintenance. adonnelly@infiltratorwater.com
Projects in Action Berkshire East, MA Wastewater Treatment System Provides Highly Treated Effluent and Low Maintenance The 9,900 GPD Advanced Enviro-Septic (AES) system at Berkshire East, a four-season mountain resort in Charlemont, Massachusetts includes 6,000 linear feet of AES pipe, divided into two-5,000 GPD module beds. The total combined sand bed area for the system is 9,486 sq. ft., with a soil loading rate of 1.2 GPD/sq. ft. The AES system is installed in a stepped configuration to slope the system and reduce the amount of fill required for the project. The smaller footprint required for the AES system and the ability to install the system with the existing topography made the AES system an attractive option. Reduced fill contributed to an overall reduction
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September 2023
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