Details

Autor(en) / Beteiligte

• Güven, Didem
• Hanhan, Oytun
• Aksoy, Elif Ceren
• Insel, Güçlü
• Çokgör, Emine

Titel

Impact of paint shop decanter effluents on biological treatability of automotive industry wastewater

Ist Teil von

• Journal of hazardous materials, 2017-05, Vol.330, p.61-67

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •Biological treatability of paint shop wastewater was studied.•Both COD and nitrogen removal were deteriorated with the feeding of paint shop wastewater.•Kinetic characteristics were determined by using SBR data and respirometric test results with the aid of model simulation.•Influence of paint shop wastewater addition on primary and secondary hydrolysis levels was much pronounced compared to the maximum growth rates.•Biodegradation kinetics were supplied as useful data for the implementation of controlled-feeding program of paint shop wastewater to ensure a reliable waste management strategy for automotive industry. A lab-scale Sequencing Batch Reactor (SBR) was implemented to investigate biological treatability and kinetic characteristics of paint shop wastewater (PSW) together with main stream wastewater (MSW) of a bus production factory. Readily biodegradable and slowly biodegradable COD fractions of MWS were determined by respirometric analysis: 4.2% (SS), 10.4% (SH) and 59.3% (XS). Carbon and nitrogen removal performance of the SBR feeding with MSW alone were obtained as 89% and 58%, respectively. When PSW was introduced to MSW, both carbon and nitrogen removal were deteriorated. Model simulation indicated that maximum heterotrophic growth rate decreased from 7.2 to 5.7day−1, maximum hydrolysis rates were reduced from 6 to 4day−1 (khS) and 4 to 1day−1 (khX). Based on the dynamic model simulation for the evaluation of nitrogen removal, a maximum specific nitrifier growth rate was obtained as 0.45day−1 for MSW feeding alone. When PSW was introduced, nitrification was completely inhibited and following the termination of PSW addition, nitrogen removal performance was recovered in about 100 days, however with a much lower nitrifier growth rate (0.1day−1), possibly due to accumulation of toxic compounds in the sludge. Obviously, a longer recovery period is required to ensure an active nitrifier community.