Studies of Sewage Purification: XVII. The Utilization of Organic Substrates by Activated

Placak, O. R.; Ruchhoft, C. C.

doi:10.2307/4586127

Cited by 9 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the fatty acid part of the molecule represents a much larger fraction in the compounds having polymers with only 15 units of ethylene oxide, and oxidation of the acid alone would yield greater usage in terms of p.p.m. The early plant scale studies b3r Hurley (11) and the more recent pilot scale studies of Degens and coworkers (6), using well characterized material, are in good agreement with the results of our investigations.…”

Section: Discussionmentioning

confidence: 99%

Biochemical Behavior of Synthetic Detergents

Sawyer¹,

Bogan²,

Simpson³

1956

Ind. Eng. Chem.

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Biochemical Behavior of Synthetic Detergents

Sawyer¹,

Bogan²,

Simpson³

1956

Ind. Eng. Chem.

View full text Add to dashboard Cite

“…In the early practice, both aeration requirements and sludge production were defined as a result of empirical guesswork derived from practical experience. Consequently, yield was basically conceived as an observed value highly variable as a function of selected operating conditions …”

Section: Exploring and Understanding The Processmentioning

confidence: 99%

Evolution of the activated sludge process: the first 50 years

Orhon

2014

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

The paper presents a critical overview of the first 50 years in the evolution of the activated sludge process. Recognition of the role of aeration and microbial activity in the purification of sewage in the early studies established the basis for the accidental discovery of the process, which was immediately adapted into practice. The problems encountered during operation started a period of empirical expansion with many process modifications. As scientific support lagged behind practice, efforts were then directed towards exploring and understanding the fundamentals of the system related to substrate removal mechanisms, microbiology, process kinetics and stoichiometry, nitrogen transformations and, then, translating accumulated information into design. Extensive research generated remarkable findings which should be regarded as major milestones for future progress in many areas such as fractionation of substrate and biomass, particle size distribution, and substrate storage. A rational foundation of the activated sludge process for the removal of organic carbon could then be established based on mass balance. This approach also defined essential parameters that could relate microbial reactions involved with plant design and operation. Scientific ideas and discoveries have also enabled conceptual development of many emerging technologies such as the sequencing batch reactor, enhanced biological phosphorus removal, the oxic-settling anaerobic process, and the super-fast membrane bioreactor.

show abstract

“…In addition, the very low ammonium concentration (<0.15 mg/L NH 4 + -N) in the WWTE does not justify the conclusion that the measured combined Cl 2 consisted solely of inorganic chloramines. Furthermore, urea, a common precursor for inorganic chloramines, should not be found in WWTE due to its good removal in the wastewater treatment plant mainly based on hydrolysis [ 35 ]. The method for the determination of total Cl 2 is based on the principle that chloramines are capable of oxidizing iodide ions, dosed parallel to the DPD, to iodine, which also forms a red dye in reaction with DPD.…”

Section: Resultsmentioning

confidence: 99%

Removal of Emerging Contaminants and Estrogenic Activity from Wastewater Treatment Plant Effluent with UV/Chlorine and UV/H2O2 Advanced Oxidation Treatment at Pilot Scale

Rott

Kuch

Lange

et al. 2018

IJERPH

View full text Add to dashboard Cite

Effluent of a municipal wastewater treatment plant (WWTP) was treated on-site with the UV/chlorine (UV/HOCl) advanced oxidation process (AOP) using a pilot plant equipped with a medium pressure UV lamp with an adjustable performance of up to 1 kW. Results obtained from parallel experiments with the same pilot plant, where the state of the art UV/H2O2 AOP was applied, were compared regarding the removal of emerging contaminants (EC) and the formation of adsorbable organohalogens (AOX). Furthermore, the total estrogenic activity was measured in samples treated with the UV/chlorine AOP. At an energy consumption of 0.4 kWh/m3 (0.4 kW, 1 m3/h) and in a range of oxidant concentrations from 1 to 6 mg/L, the UV/chlorine AOP had a significantly higher EC removal yield than the UV/H2O2 AOP. With free available chlorine concentrations (FAC) in the UV chamber influent of at least 5 mg/L (11 mg/L of dosed Cl2), the total estrogenic activity could be reduced by at least 97%. To achieve a certain concentration of FAC in the UV chamber influent, double to triple the amount of dosed Cl2 was needed, resulting in AOX concentrations of up to 520 µg/L.

show abstract

Studies of Sewage Purification: XVII. The Utilization of Organic Substrates by Activated

Cited by 9 publications

References 0 publications

Biochemical Behavior of Synthetic Detergents

Biochemical Behavior of Synthetic Detergents

Evolution of the activated sludge process: the first 50 years

Removal of Emerging Contaminants and Estrogenic Activity from Wastewater Treatment Plant Effluent with UV/Chlorine and UV/H2O2 Advanced Oxidation Treatment at Pilot Scale

Contact Info

Product

Resources

About