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|Title: ||Conversion of biomass residues into (activated) biochar for the removal of metals from industrial wastewater|
|Authors: ||Van Dael, Miet|
|Issue Date: ||2016|
|Citation: ||24th European Biomass Conference & Exhibition, Amsterdam, 6-9 June 2016|
|Abstract: ||The removal of 99% of metals is possible with standard physicochemical wastewater treatment systems such as flocculation, coagulation, flotation and chemical precipitation. As a consequence of stricter legislation with regard to metal concentrations in industrial waste water, companies use ion exchangers to remove the residual metals. These ion exchangers are expensive and sometimes do not meet targeted metal concentrations in case of complex waste water streams, e.g. waste water containing both a high concentration in metals and organic matter. In this case, the best practice is to use an activated carbon filter to avoid fouling of the resin used in the ion exchanger. Companies are, therefore, on the lookout for alternative, cheaper, and more efficient technologies.
At the same time pyrolysis allows transforming organic residue streams into valuable products. Previously, pyrolysis research was mainly focused on (i) the production of bio oil, which has a low economic value and for which the upgrading process is complex and expensive, and (ii) the processing of clean biomass waste streams such as wood. However, various biomass residue streams are available which can be transformed into activated biochar. The latter is a more sustainable alternative for the conventional activated carbon used today in wastewater treatment.
In this study this innovative research path will be further explored. Activated biochar will be produced by pyrolysis of biomass residue streams, such as manure and sludge. In the next step, this activated biochar will be used to test its use in the removal of the remaining metals in real wastewater samples of different companies. In addition to a technical analysis, a techno-economic analysis (TEA) will be performed. This TEA consists of four different steps (1) market analysis, (2) mass and energy balance, (3) economic analysis, and (4) sensitivity analysis. It allows verifying whether the process is economically feasible from an early phase. Moreover, a TEA assists in identifying the parameters that should be focused on to increase the chances of market success. This implies that the technical and economic calculations are directly linked. Using the technical analysis and the TEA, we will identify which biomass residue sources are most interesting to produce an activated carbon with a high quality that can be used for wastewater treatment. We closely collaborate with the industrial stakeholders (i.e. waste processing companies, manure processing companies, water treatment companies and technology suppliers) and Flemish government to identify the main problems and find solutions to overcome the remaining barriers.|
|Type: ||Conference Material|
|Appears in Collections: ||Research publications|
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