# New ozone treatment process at Egaa Wastewater Treatment Plant

- **Source:** TED · `489498-2024`
- **Buyer:** Aarhus Vand A/S
- **Published:** 2024-08-14
- **Deadline:** —
- **Estimated value:** 42,000,000 DKK
- **CPV codes:** 45252100, 45000000, 45252000, 45252200, 45252210
- **Place-of-performance NUTS:** DK042, DNK
- **Buyer-address NUTS:** —
- **Notice type:** can-standard / 30

## Procedure details

Source lists may span several lots; list positions do not establish relationships.

### Procedure Types

- neg-w-call

### Award Criterion Names

- Price (TCO)
- Technical solution (80%)
- Organisation (20%)

### Award Criterion Descriptions

- Evaluation of the sub-criterion “Price (TCO)” will be based on total cost of ownership (TCO) defined as total of Capital investment costs and 15 years of operational and maintenance costs calculated as the following: "Price (TCO)" = (Capital investment costs) + (Operational and maintenance costs in first 15 years of operation)
- Process solution (35%) The following is weighted positively: − Process solution has a treatment capacity with high performance at low and high load conditions. − Documented full scale tests for the process solution − High degree of controllability and online performance measuring − Reusing the off-gas (if any) in the process tank − District heat production from cooling the ozone generators − Components matches Client’s positive list (cf. Appendix 3M - Positive list and equipment) − Good availability of spare parts − Design based on lab-scale tests on wastewater from Egå WWTP Hydraulic solution for inlet and outlet of new ozonation treatment stage (15%) The following is weighted positively: − Minimal pumping of water − Good distribution of flow to the sand filter units − Good placement of iron chloride dosing point for removal of phosphorous in the sand filters − No or minimal negative impact on the existing operation during construction and operation. Construction and Architectural expression (15%) The following is weighted positively: − The architectural expression matches existing facilities (cf. Appendix 3K - Architec-tural expression) − That the plant visually occupies as little space as possible in the landscape − That the building fulfils any constructional requirements and mechanical require-ments for operation of the equipment during summer and winter seasons Process and functional guarantees (15%) The following is weighted positively: − High maximum allowed bromide concentration in the influent to the ozonation plant (process guarantee) − Functional guarantees will be considered positively in the Tender evaluation, de-pending on the extent of the guarantees Working environment and conditions (10%) The following is weighted positively: − Easy accessibility and serviceability to equipment − A minimum of required maintenance − A minimum of noise, and smell − High degree of safety − No heavy lifting by operators during maintenance Flexibility (5%) The following is weighted positively: − Process solution can easily handle and adapt to changing load conditions within nor-mal operational and shifts from dry to wet weather. − That the plant can run without much disturbance during planned maintenance. − The new treatment step can be easily expanded (increased capacity) and upgraded with new treatment options to handle potential future changes (e.g., more stringent effluent demands, change in load and future optimisation of overall WWTP opera-tion) Service and maintenance contract (5%) The evaluation of the Service and maintenance contract is relative to the actual technology offered by the individual tenderers. Evaluation of the Service and maintenance contract will thus be based on the conditions in the individual offer, in comparison with the level offered in all the received offers. Short reaction times are positively weighted. It has a positive impact the longer the service agreement can be renewed at the same price excl. price regulation. The Client reserves the right not to purchase the service agreement.
- Organisation The organisation diagram clearly describes the organisation and cooperation between the contractor, subcontractors and/or -suppliers, key personnel etc. and that the key staff have relevant experience within their field of work. It's weighted positively if they also have experi-ence with ozonation and work at municipal WWTPs. It's weighted most relevant for ozona-tion at WWTP, and secondly ozonation at Industry. The organisation and key staff will be evaluated as whole with extra focus on the Mechani-cal, Process and Hydraulic CV’s. These three are weighted higher as they are integral for the success of this turnkey contract. Furthermore for the Project manager and Site manager, it’s weighted positively if they have experience with projects of the same economical magnitude and specifically turnkey con-tracts of the same complexity and extent regarding scope of process design, equipment, electrical and construction works. That it is clearly indicated how the communication is envisioned between the Client and Con-tractor throughout the project in relation to the state-gate model in Appendix 3E - Stage-gate model.

### Options

- The contract includes option for a service and maintenance contract for 2x5 years, to ensure proper operation of the new plant. The contract cover full service and maintenance incl. manhours for external staff, normal spare and wear parts such as diffuser, oil, filters etc. acceording to th esuppliers guidelines. In addition, the contract cover necessary auxiliary equipment. Aarhus Vand must notify the contractor no later than 90 days after the contract is signes by both parties, if they want to use the options.

## Description

There has been a significant change in the composition of the wastewater to the Egå Wastewater Treatment Plant (WWTP) due to the expansion of Aarhus University Hospital in Skejby. Pharma residues have been registered that are above the PNEC values in the discharge from the Egå WWTP following the expansion of the hospital. This has led Aarhus Municipality to conclude that additional treatment for pharma residues must be carried out at the WWTP. A 4th treatment step therefore has to be established at Egå WWTP to achieve sufficient removal of drug residues in the effluent. A screening of available treatment technologies and theoretical modelling has been carried out based on the 10 focus substances that can be measured in the effluent from Egå WWTP. From this, it is concluded that implementing an ozone treatment step in front of the existing sand filter will be enough to remove the remaining pharma residues.

## Award result

- **Published notice total:** 42,000,000 DKK
- **Contract concluded:** 2024-08-09
- **Winner:** Krüger A/S (CVR 57446412), VAM A/S (CVR 13760381) · value 42,000,000 DKK
Published values may cover multiple lots, options and frameworks; they are not supplier revenue. Unlinked notice summaries do not assign each value or expiry to each winner.

## Original notice

https://ted.europa.eu/da/notice/-/detail/489498-2024