The influence of coagulant type on the biological treatment of sewage sludge.

Anaerobic digestion (AD) and composting are commonly utilized sludge management methods however, the influence of different coagulant types on these biological processes and their stabilized biomass characteristics have not been fully explained. In this study, the effect of the coagulant used in municipal wastewater treatment on the biological stabilization of sludge was investigated. Fully controlled and monitored small-scale AD and composting bioreactors were utilized.

Peracetic acid for conditioning of municipal wastewater sludge: Hygienization, odor control, and fertilizing properties.

Peracetic acid (PAA) is an environmentally friendly disinfectant and oxidizer used in several water and wastewater treatment applications. In the present study, PAA was utilized for the conditioning of municipal wastewater sludge before thickening and dewatering. It was shown that PAA can effectively prevent odor formation (i.

Comparison Study of Manometric Respirometric Test and Common Chemical Methods in the Determination of BODbold7 in a Pulp and Paper Mill's Wastewaters.

The biological oxygen demand (BOD) test is widely used in many wastewater treatment plants. The conventional BOD tests are usually time-consuming and the results are often out of date for process control purposes. The aim of this research was to compare the manometric respirometric test with common chemical methods in the determination of BOD of wastewater from a pulp and paper mills as well as to evaluate the BOD (7) values of both wastewaters from the short-term respirometric measurements.

Comparison Study of Different BOD Tests in the Determination of BOD(7) Evaluated in a Model Domestic Sewage.

The aim of this research was to study the suitability of a manometric respirometric test (OECD 301F) for the determination of biological oxygen demand (BOD) in domestic wastewater. This was done by comparing four different BOD tests (a manometric respirometric test, oxygen sensor determination, iodometric titration, and UV absorption measurement) and by evaluating the BOD(7) value after a short-term measurement applying the manometric respirometric test. Measurements were done in three different laboratories.