The outcomes of the project are two-fold: optimisation of the novel treatment technologies (Anammox, nutrient removal using algae or wetlands) for side stream treatment and the integrated and optimised scheme for sludge management. The technology will contribute to energy recovery and savings, greenhouse gases emission reduction, nutrients removal, sludge minimization and improvement of the economic aspects of WWTP.
The idea of the project is presented on a Figure. The main stream of a WWTP includes primary clarifier, biological reactors and secondary clarifier. Primary and waste activated sludge feed a digester and allow for biogas generation. The proposed novel technology is implemented in the side stream of digested sludge reject water with high concentration of nitrogen and phosphorus. The first step of the technology is the nitritation/anammox process, followed by algae reactor or treatment wetland system. The project plan consists of seven Work Packages (WPs) divided into detailed tasks.\r\n
WP1 deals with a process of coagulation in the primary clarifier. The objective of the WP1 is increasing primary sludge production for increased biogas production in anaerobic digesters and reducing the organic load on downstream biological treatment processes and thereby reducing energy consumption for aeration.
WP2 is divided into three tasks including the nitritation/anammox process, algae breeding and wetlands. The task 2.1 will focus on investigation of several parameters/boundary conditions influencing the anammox process. The aim of the task 2.2 will be to determine the effectiveness of nitrates and phosphates removal from the effluent after the anammox process by the growth of algae and to determine the technological parameters of the algae reactor and algal growth process. The objective of the task 2.3. is to create and maintain the treatment wetlands for ensuring stable and low concentration of nutrients compounds.
The objective of the WP3 is to indicate the parameters of additional biomass sources that influence biogas yield. The additional sources of biomass, both internal (increased volume of primary sludge, algae) and alternative (biomass from outside of WWTP) increase biogas volume that allow to increase the share of renewables and simultaneously limit the share of non-renewables in the WWTP energy balance.
Model based optimization of the integrated technology using a mechanistic approach is a subject of the WP4.
The aim of the WP5 is to link the efficiency of contaminants removal with energy aspects and greenhouse gases emissions at the WWTP. There will be indicated the influence of technological upgrades on energy and environment output of the WWTP as well as possibilities of enhancing the share of renewables in the WWTP energy balance. It is expected that the proposed integrated technology will be energy-efficient and climate-friendly.
The aim of the WP6 will be optimization of the wastewater treatment plant operation with help of techno-economic analysis. In order to verify the effectiveness of the proposed technology in economic terms, it is planned to determine the annual operating costs of treatment plant with application of the proposed integrated technology.
The aim of the WP7 will be scientific coordination between project partners and intensifying communication between all the WPs leaders.