Updating a model of pulp and paper wastewater treatment in a partial-mix aerated stabilization basin system

Abstract

A relatively simple set of calculations was presented in 1994 to evaluate the effectiveness of each ASB cell as reactor, clarifier, and digester. The steady-state model, which incorporated estimates of solids settling and benthal feedback of BOD5 and nutrients, has been a reasonable diagnostic tool for municipal and industrial applications. Results have aided in understanding normal system function, the nature of chronic inefficiencies of individual systems, and appropriate modifications to meet changes in discharge requirements. For applications in the pulp and paper industry, several changes have been incorporated recently. Nitrogen limitation is not needed in modeling pulp and paper ASB reactions. Slowly biodegradable material is modeled as a contributor to soluble BOD5, and this contribution becomes a significant factor in the latter segments of an ASB. Phosphorus availability is modeled as a stoichiometric control of soluble BOD5 uptake. Anoxic microorganisms are assumed to be responsible for a portion of the soluble BOD5 consumption in the first ASB aeration zone. Finally, the long-term nutrient capture in ASBs is modeled as 3% for nitrogen and 28% for phosphorus.

Wastewater treatment in the pulp-and-paper industry: A review of treatment processes and the associated greenhouse gas emission

“…They showed the dependency of BOD removal efficiency on the rate of nutrients addition. Bryant (2010) simulated the treatment process of pulp-and-paper wastewater in ASB and showed that although the treatment system could remove up to 67% COD from the wastewater, certain limitations such as nitrogen supply affected the removal efficiency of contaminants. Schnell et al (2000) compared three different laboratory-scale systems, namely AS, facultative stabilization basin (FSB) and ASB, in treating high rate and low rate Kraft mill wastewaters.…”

Intensification of wastewater treatment of the paper and cardboard factory using physical and chemical methods

“…Найбільш доступним і ефективним як з точки зору високої ефективності процесу очищення, малих витрат на будівництво та експлуатацію, так і впливу на навколишнє середовище і природні водні об'єкти є біологічний метод [8][9][10][11], а саме, аеробний [12,13] та анаеробний [14,15] процеси.…”

Removal of nutrients from pulp and paper biorefinery effluent: Operation, kinetic modelling and optimization by response surface methodology

“…According to a study by (Bryant, 2010), the substrate removal plot for ammonia removal has R 2 = 0.97, with bio-kinetic coefficients like Kv and Umsr for ammonia being 0.477 and 1.27 g/L/d, respectively. The Kv was determined as 0.78, 32.54, 93.60, and 34.14, mg/L/d, and the maximum utilization rate (Umsr) was 0.36, 32.3, 45.5, and 33.8 mg/SS/d for attached growth, An-HMBR, suspended growth, and An-HBR system respectively (Burman and Sinha, 2020).…”