Continuous biological treatment of selected pre-treated and non-treated membrane concentrates originating from TMP and Deinking wastewater streams from pulp and paper industry
Oviasogie, U., Universitat Stuttgart, Germany
(free)
Abstract:
The implementation of the European Framework Directive (EFD) require integrated water
resource management (IWRM), an important tool in managing available water resources in the
presence of emerging constraints. Pressures caused by variability in water supply cycles,
droughts, pollution, industrialization, increasing domestic and commercial demand, inadequate
infrastructure, intense urbanization and population growth, and decrepit distribution networks
has led to the increase exploitation of industrial wastewater.
Most industrial process has some negative impacts on the environment especially on a catchment scale i.e. water, and air and soil quality. In the context of water resources and environmental protection measures, the term “sustainable development”, a development that is compatible with the future gains and environmental protection is regulated more and more by law. To comply with these emission based
limit values, basically downstream or subsequent techniques, so called “end-of-pipe techniques” are used. We found that continuous biological treatment (CBT) processes present secondary measures to purify contaminated industrial wastewater. Hence, the objectives of this research paper was to investigate the chemical oxygen demand (COD), biological oxygen demand in 5 days (BOD5), suspended solids (SS) denoted as “food” (F) to biomass (M; microorganism) ratio (F/M), by targeting varying rate of influent stream. The parameters results yields through continuous biologically treated thermal mechanical pulping (TMP) raw wastewater (90%), TMP concentrate (80%), anaerobic pre-treated TMP concentrate at 55 (45%) and 35 (55%) degrees Celsius, deinking-anaerobic pre-treated wastewater (40%), deinking anaerobic ozone treated concentrate (60%), anaerobic-aerobic Fenton treated deinking
concentrate (40%) streams from pulp and paper mill industry.
Our result show the maximum elimination rate based on the effluent parameters i.e. chemical oxygen demand (COD), soluble chemical oxygen demand (COD mf), suspended solids (SS; AFS), and biological oxygen demand in 5 days (BOD5) of each continuous biologically treated wastewater. Previous experiments performed using sequential batch reactor (SBR) treatment scheme yielded lower results. The results of our experiments on industrial wastewater streams from the pulp and paper industries
within Baden Württemberg, Germany have far reaching global industrial implications. TMP raw
wastewater will serve as the first phase of the investigation.
Keywords
Chemical Oxygen Demand (COD); Biological Oxygen Demand (BOD5); Suspended Solids (SS); Continuous Biological Treatment (CBT); Sequential Batch Reactor (SBR); Thermal Mechanical Pulping (TMP); Deinking.
