Cod Fractions In Mechanical-Biological Wastewater Treatment Plant

Abstract

The paper presents results of studies concerning the designation of COD fraction in the raw, mechanically treated and biologically treated wastewater. The test object was a wastewater treatment plant with the output of over 20,000 PE. The results were compared with data received in the ASM models. During investigation following fractions of COD were determined: dissolved non-biodegradable SI, dissolved easily biodegradable SS, in organic suspension slowly degradable XS and in organic suspension nonbiodegradable XI. Methodology for determining the COD fraction was based on the guidelines ATV-A 131. The real percentage of each fraction in total COD in raw wastewater are different from data received in ASM models.

Wastewater Treatment and Water Reuse Technologies for Sustainable Water Resources: Jordan as a Case Study

“…Regarding sludge retention time, MBR system requires less than SBR, and it is considered as a cost effective. For this reason, water authorities are looking to apply SBR in the new plants [31][32][33][34]. 3.…”

“…3. Advanced treatment technologies can be breathing room for conservative secondary biological treatment to further stabilize oxygen-demanding substances in the wastewater, or in order to eliminate nitrogen and phosphorus through modern technologies such as SBR [14,33,34]. 4.…”

“…By using terrestrial or land treatment systems, plant growth and soil adsorption convert biologically available nutrients into less forms of biomass, It is harvested for a variety of usages, such as alcohol manufacturing, methane gas generation and/or cattle feed enhancements. Land-dwelling treatment techniques include very slow rate subsurface infiltration; rapid infiltration methods and slow rate overland flow [14,34]. 5.…”

“…The Jordanian experience with this system and the literature referred that efficiency of this treatment method in treating domestic wastes is excellent. These systems can achieve very good BOD removal, generally more than 95%, they can function well under high temperature conditions, and require only a fraction of the land area in comparison with waste stabilization ponds [26,27,[32][33][34]. The plant is designed for a design horizon of 20 years.…”

Removal of Iron and Organic Substances From Groundwater in an Alkaline Medium

“…Before coagulation, oxidation of Fe 2+ ions occurring in inorganic combinations is required, after which the sedimentation process is not required. The use of iron coagulant may result in the formation of coloured, difficult-to-remove combinations of Fe 3+ ions with organic substances, especially humic acids (Duan & Gregory, 2003;Huang & Shiu, 1996;Krupińska, 2012Krupińska, , 2016Płuciennik-Koropczuk et al, 2017;Xu et al, 2016). During coagulation, on the one hand, the possibility of neutralizing negatively charged combinations of iron with organic compounds by coagulation cations or their positively charged hydroxide complexes is used, on the other hand, the high adsorptive capacity of precipitated aluminium hydroxide or iron is also used (Cheng & Ghi, 2002;Davis & Edwards, 2014;Ghernaout, 2014;Ghernaout & Boucherit, 2015;Lin, Couperthwaite, Huang, Dempsey, & Hu, 2014;Saxena, Brighu, & Choudhary, 2018;Sillanpää, Ncibi, Matilainen, & Vepsäläinen, 2018;Wolska, 2011;Xu et al, 2018).…”