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Engineering and On-site Wastewater Management

Based in Prince Edward Island (PEI) we offer professional wastewater consultancy and design capabilities. We consult on any and all aspects of decentralized waste-water management. We have the capabilities to plan, design and construct on-site sewage and septic systems to fit any needs. We have an international track record with projects across Canada, the Caribbean and North Africa and clients ranging from small- scale residential to centralized municipal treatment systems.
Our engineering expertise includes, but is not limited to:

  • Commercial & residential: On-site wastewater treatment system design and evaluation
  • Wastewater planning and management studies
  • Development of wastewater feasibility studies and roadmaps for technology adoption
  • Site suitability assessment and percolation test
  • Wastewater permitting assistance

Case Study

Sustainable Caribbean Wastewater Strategy – St. Lucia
Project Description

Island Water Technologies Inc. (IWT) was contracted by the Canaries Community Improvement Foundation (Canaries, St. Lucia) to undertake a wastewater feasibility report which was financed through the Global Environment Facility (GEF) Small Grants Program (SGP) under the United Nations Development Program (UNDP). The scope of the project involved working with community representatives, to determine the feasibility of developing sustainable Caribbean wastewater treatment solutions for the town of Canaries, St. Lucia.

Results

The report assessed the impact of climate change on the existing infrastructure and incorporated future wastewater planning considerations. Key stakeholders were identified, and go-forward strategies incorporating low-complexity, cost effective solutions for improved wastewater management are suggested.

A wastewater development roadmap was developed with solutions ranging from assessing the existing infrastructure and setting infrastructure baselines (water sampling, auditing existing holding tanks) all the way through to suggesting a centralized piped network with decentralized treatment solutions. Tasks were divided into those that can be enacted in the short-term with limited resources, as well as a longer term vision of decentralized treatment integrated to a centralized network of piping. All suggestions were aimed at reducing risk associated with fecal borne illness as a primary goal and a secondary goal of improved tourism based activities.

The components and outputs of the four proposed options suggested for the Canaries community were identified and point to immediate low-cost strategies and longer-term solutions. It is envisioned this document will function as a key road-map for the Canaries community, allowing them to predict next steps from a wastewater solutions perspective and help in securing funding for immediate and long-term projects. The methodology of this report could be followed in developing sustainable Caribbean wastewater solutions on a wider scale

Suggested infrastructure improvements identified for the community of Canaries (St. Lucia)

Case Study

Wastewater Treatment System Design – Toronto, Ontario
Project Description

Our on-site partners at ESSE identified a client that was exceeding effluent objectives of 10 mg/L cBOD and TSS with their current aerated septic system.

Our Solution

Nine stands of our ClearPod fixed film media were incorporated into the main aeration chamber of an existing 12,000L/day treatment system to improve performance and meet/exceed effluent objectives.

The system consists of the following:

Figure 1: Process Flow Diagram of the wastewater treatment system

Results

The ClearPod fixed film media was installed in the Yacht Club and Marina Restaurant’s existing septic system on September 23, 2014. Previous to the installation, effluent levels were consistently above the objective of 10 mg/L. After the installation, effluent levels met or exceeded the objectives obtaining an average concentration of 3.6 mg/L cBOD and 5.2 mg/L TSS.

Performance

Recent wastewater sampling from this test site has indicated effluent from septic system after the addition of ClearPod fixed film media of ≤ 10 mg/L for both cBOD and TSS.

The results indicate an approximate removal rate of 77% for cBOD and 87% for TSS, significantly reducing the load to the subsequent leach field. This reduced loading to the leach field will significantly improve hydraulic flow and extend the life time of the system.

The facility is now able to consistently meet the required 10 mg/L TSS/cBOD

Figure 2: Effluent concentrations before and after the ClearPod fixed film installation

Figure 3: Average influent and effluent wastewater characteristics

Upgrade Opportunity

No excavation had to be carried out and no new tanks were added to the system.
The ClearPod fixed film was added to an existing aerated tank. This clearly demonstrates the benefit of ClearPod fixed film media as compared to a conventional aeration system and the improved effluent that can be attained by the addition of ClearPod fixed film media.

Cost Benefit

The system was upgraded with the addition of 9 stands of ClearPod fixed film media to an existing diffuser/blower system. This shows how ClearPod fixed film can be easily integrated with new or existing systems and provide maximum utilization of new or existing aeration. The fixed film addition has provided the consistency of effluent required for this system, with minimal additional design/construction and no requirements for additional tankage. An out of compliance system was brought into compliance, for significantly lower capital cost than replacing a single tank in the system.

Contract Research & Development

IWT’s continued involvement in R&D ensures that we are at the forefront of innovation. Listed below are a few recent projects.

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Industrial Research Assistance Program   #850425
Validation of Mobile Low-energy Wastewater Treatment System (REGEN

Conducted a complete performance evaluation of the REGEN system including BOD5, TSS, Total N and NO3-N analysis on a weekly basis, including individual sample testing for individual components.
Testing was completed at the Truro, Nova Scotia demonstration site, in cooperation with Dalhousie University

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Industrial Research Assistance Program   #852568
Design for Manufacture of Bio-electromechanical Sensors for the Control of Waste Water Treatment Processes

Tested an existing Bio-electrochemical Sensor (BES) in real world domestic waste water systems to determine a correlation in comparison with a traditional BOD5 test.
Designed and tested prototype sensor and validated design including production of a bill of materials and final design drawings.
Ensure effectiveness of communications modules in interfacing with existing information processing and a range of PLC’s while maintaining modularity.
Production of commercial grade electrical components for the probe assembly. Estimation of energetics including maximum draw as well as operating voltage and power schemes for efficiency.
Alpha testing of all sub components and design validation for large scale manufacturing.
Beta testing with industrial partners.

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Industrial Research Assistance Program   #829842
Materials for Improved Biofilm Development

Develop and test fixed film media incorporating bio-mimicry and advances in biofilm attachment that increases the retention of active microbial biomass by over 15% in comparison with existing biofilms used in domestic waste water systems and to translate this retention into a similar increase in the treatment rate.
Conducted bench scale testing of alternative dispersal system by increasing the wetting of the surface to up to 90% of its area.