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IWAMA Final Publication


Lifelong learning and knowledge exchange

The Baltic Smart Water Hub is a multifunctional online portal aiming at connecting water experts in the region. The Hub displays good practices, technical solutions and tools on a broad array of water-related issues such as wastewater treatment, storm water management, fresh water solutions, river-basin and lake areas management.

The training materials output represents the joint effort of transnational learning activities. The report presents state of the art, needs and future possibilities regarding lifelong learning opportunities in the Baltic Sea Region wastewater treatment sector. The Moodle-based Training Materials Package consists of educational material for wastewater treatment plant personnel with content concentrated around the themes of smart energy and sludge management. A part of the training materials, the online WWTP game is an interactive mode of learning available for both professional WWT operators and students of the field.


Outputs targeted at smart energy management

The data presented in the report gives information about the current state of 66 differently scaled wastewater treatment plants in the Baltic Sea Region that are operated under various legal requirements and differing restricted nutrient effluent values. Apart from a general overview of treatment efficiency and applied technologies in the four sub-regions Baltic, Nordic, South-Baltic and Slavic, the report reveals the energy demand of the respective WWTPs in terms of most used ratios (energy to load, flow).

The aim of developed and tested energy audit concept is to give operators an opportunity to perform self-auditing in their WWTPs, and therefore to enhance the energy efficiency of the treatment process in combination with extended nutrient removal level (energy-water-nexus) and detect measures for both short and long-term improvement of the treatment process (e.g. less energy consumption by changing parameters). The detailed content of the energy audit steps will be evolved in the process of performing the smart energy management audits at the IWAMA partner plants.

  • Pilot investment: Simple control system in Daugavpils wastewater treatment plant (LV) | read more | case in Hub

Investment into installing new equipment in Daugavpils WWTP, which allows organizing maintenance works without harm to technological process and keeps separate electricity records by main consumer groups. Collected real time data allows to control, analyze and in short time correct and optimize settings of equipment used, reducing energy consumption while maintaining the required quality of wastewater treatment.

  • Pilot investment: Energy optimized control of large wastewater treatment plant in Kaunas (LT) | read more

This investment is targeted at reaching energy efficient nutrient reduction. In the framework of the pilot, online nitrogen measurement devices are installed to monitor nitrogen concentration in the aeration tanks. Furthermore, the plant install mass airflow sensors to measure air flow to the aeration tanks, and an additional methanol dosing point in the denitrification zone of the aeration tank to advance nitrogen removal. The advanced process automatization and programming for energy optimization of the blowers is implemented to reach better energy-efficient management on the plant.

  • Pilot investment: Advanced control in Grevesmuhlen wastewater treatment plant (DE) | read more | case in Hub

Investment in Grevesmühlen includes a decision making tool for optimized process operation and mass flow management regarding the complex system of sludge digestion, co-fermentation, thermal hydrolyses, process water treatment and nutrient elimination on a wastewater treatment plant. To calibrate the developed tool, Grevesmühlen WWTP launched investigation of the process under varying conditions, focusing particularly on thermal hydrolysis.

  • Pilot investment: Combined anammox-constructed wetland pilot-plant in Gdansk wastewater treatment plant (PL) | read more | case in Hub

The pilot investment in Gdansk showcases an innovative high energy-efficient and cost-effective wastewater treatment concept. This investment included constructing the combined anammox-constructed wetland pilot plant and instaling additional energy meters at the WWTP.


Outputs targeted at smart sludge management

The report gives information about the current state of affairs of 66 differently scaled wastewater treatment plants in the Baltic Sea Region. Report includes information about general inflow parameters, sludge treatment technologies and final usage of the sludge. The answers were collected from Sweden, Finland, Russia, Estonia, Latvia, Lithuania, Poland, Belarus and Germany.

  • Audit concept for smart sludge management | read more

The aim of developed and tested sludge audit concept is to give operators an opportunity to perform self-auditing in their WWTPs to enhance the sludge treatment process and find possible deficiencies (e.g. wrong operating parameters). The detailed content of the sludge audit steps will be evolved in the process of performing the smart sludge management audits at the IWAMA partner plants. High-quality audit concept, which considers technological and regional peculiarities, gives opportunity to perform sludge audits during the project and after the project closure.

  • Pilot investment: Sludge humification beds in Türi and Oisu wastewater treatment plants (EE) | read more

The pilot involves design, construction and operation of the full-scale sludge humification beds in small WWTPs of Türi and Oisu. Analyses of sludge hygienisation (pathogens), stabilisation, heavy metals and pharmaceuticals are performed to demonstrate the effectiveness of the technology. The pilot exemplifies a smart solution for small-scale wastewater treatment plants in the Baltic Sea Region.

  • Pilot investment: Reject-water treatment system in Tartu wastewater treatment plant (EE) | read more

The pilot concept for Tartu WWTP involves a reject-water deammonification system. The pilot applies a relatively easy and non-patented solution that could be duplicated in similar large-scale WWTPs with sludge stabilization via anaerobic treatment. The demonstration of low-cost, inoculum-independent startup of the sludge water deammonification process in Tartu WWTP provides a good demonstration for integration and improvement of nitrogen removal in other bigger wastewater treatment plants.

  • Pilot investment: Energy-efficient sludge drying in Jurmala wastewater treatment plant (LV) | read more

Jurmala WWTP is piloting a drying and incineration unit designed to reduce the amount of surplus sludge from the wastewater treatment process using vapor of thermal decomposition of volatile products and non-condensable gases as fuel. As a result of this pilot project, an innovative approach shall be implemented towards solving the problem of small WWTP surplus sludge utilization, which is very topical in the water sector and aims to protect the environment.