Activated sludge degradation of nitrilotriacetic acid (NTA) - metal complexes by Earl E. Shannon

Cover of: Activated sludge degradation of nitrilotriacetic acid (NTA) - metal complexes | Earl E. Shannon

Published by Environment Canada, Environmental Protection Service in [Ottawa, Ontario] .

Written in English

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Edition Notes

Book details

Statementby E.E. Shannon, N.W. Schmidtke, and B.A. Monaghan.
SeriesTechnology development / Water Pollution Control Directorate -- report EPS 4-WP-78-5, Environmental Protection Service report series = Série de rapports du Service de la protection de l"environnement
ContributionsSchmidtke, N. W., Monaghan, B. A., Canada. Environmental Protection Service., Canada. Water Pollution Control Directorate.
Classifications
LC ClassificationsMLCM 2008/41671 (T)
The Physical Object
Paginationvi, 16 p. :
Number of Pages16
ID Numbers
Open LibraryOL16802342M
ISBN 100662100956
LC Control Number2008371491

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Get this from a library. Impact of nitrilotriacetic acid (NTA) on an activated sludge plant: a field study. [N Wei;]. Good reference book to have, if you are studying wastewater treatment and would like a more in depth understanding about the topics.

It would help to clarify fundamental mechanism of activated sludge hence nitrification and denitrification in wastewater treatment processes.

Would recommend by: Nitrilotriacetic acid was degraded with acclimatized bacterial populations in both the biochemical oxygen demand test and activated sludge.

A one-week acclimatization period was needed in the. Experiments with the degradation of morpholine (MO), sulphanilic acid (SA), nitrilotriacetic acid (NTA) and methanol (MA) were carried out in completely-mixed systems at constant volumetric loading (B v) and variable solids retention time (SRT).In the first series, a mixed substrate composed of the above compounds was used (each compound formed 25% of the total COD), in the Cited by: Nitrilotriacetic acid (NTA) adsorption onto sawdust activated carbon was studied.

The adsorption process was highly pH dependent and has been explained on the basis of. Sulfamethazine (SMT) is extensively used as growth promoters and antibacterial drugs. In this study, premagnetized Fe 0 was used to catalyze H 2 O 2 decomposition (pre-Fe 0 /H 2 O 2) in the presence of nitrilotriacetic acid (NTA) to remove SMT at neutral pH all, % and % of SMT were removed by the pre-Fe 0 /H 2 O 2 process (60 min) and the pre-Fe 0-NTA/H 2 O 2.

The biodegradation of nitrilotriacetic acid (NTA) was examined in three estuarine ecosystems, one of which had been exposed previously to the chemical. Activated sludge degradation of nitrilotriacetic acid book was measured as the conversion of radiolabeled NTA to 14 CO 2, 14 C‐labeled cells and the amount of label remaining in solution.

1 day ago  In previous studies, we interestingly found that several ligands (e.g., nitrilotriacetate and humic acid) could significantly accelerate the oxidation. Experimental studies on bacterial degradation of NTA.

Vat, GocKE, K. Comparisons of methods for determining the turnover time of dissolved organic compounds. Mar. Biol. 42, 1. GUDERNATSCH, H. Biological degradation of heavy metal complexes of nitrilotriacetic acid in laboratory activated sludge plants. TOXICITY OF METAL IONS TO ANAEROBIC DIGESTION OF PRIMARY SLUDGE Metal ion Concentration in wastewater, mg/l Cadmium 1 Copper 10 Dichromate (as Cr) 50 Lead Nickel 40 Tin(asSn) 9 Zinc 10 Sodium Salt of Nitrilotriacetic Acid Inthe sodium salt of nitrilotriacetic acid was suggested as a replacement for the phosphates in detergent.

Mechanistic insights into a novel nitrilotriacetic acid-Fe0 and CaO2 process for efficient anaerobic digestion sludge dewatering at near-neutral pH July Water Research Biodegradation of Nitrilotriacetic Acid in Aerobic Systems Bernhard H.

Pfeill and G. Fred Lee Water Chemistry Laboratory, University of Wisconsin, Madison, Wis. The biodegradation of nitrilotriacetic acid in the biochemical oxygen demand test and laboratory activated sludge units has been investigated.

Nitrilotriacetic acid was degraded with. Sludge dewatering has proven to be an effective method to reduce the volume of sludge.

In this study, a novel stratification approach aimed at better understanding the factors influencing the sludge dewaterability (as determined by capillary suction time, CST) was developed. The sludge flocs from 14 different full-scale wastewater treatment plants (WWTPs), including sewage, leachate.

Effects of nitrilotriacetic acid (NTA), copper ion (Cu2+) and their complexes on the efficiency of activated sludge process were evaluated by determining the changes in physical and chemical parameters in a laboratory-scale unit.

Primary effects of these toxicants on microorganisms in the activated sludge process were also evaluated by determining the change of in vivo dehydrogenase. A series of experiments were undertaken using an activated sludge pilot plant treating settled sewage to determine the effects of transient temperatur.

The removal of nitrilotriacetic acid (NTA) following acclimatization in an activated sludge pilot plant has been studied during transient changes in operating conditions.

These changes included increases in hydraulic loading and influent chemical oxygen demand (COD) and such phenomena in combination with transient temperature reductions. Short-term increases in hydraulic loading from 1 to 2. The large volume of oil sands process-affected water (OSPW) produced by the oil sands industry in Northern Alberta, Canada, is an environmental concern.

The toxicity of OSPW has been attributed to a complex mixture of naturally occurring acids, including naphthenic acids (NAs). Highly cyclic or branched NAs are highly biopersistent in tailings ponds, thus understanding structure–reactivity.

The removal of nitrilotriacetic acid (NTA) following acclimatization in an activated sludge pilot plant has been studied during transient changes in operating conditions.

The removal of Cd, Cr, Cu, Pb, Ni, and Zn in an activated sludge pilot plant acclimatized to nitrilotriacetic acid (NTA) has been compared with an identically operated plant receiving no NTA. During steady-state operation the removal of Pb and Ni was reduced in the presence of NTA but there was no detectable difference in mixed liquor metal concentrations.

NTA Na3. The waste-activated sludge was obtained from an activated sludge plant that was acclimated to degradation of NTA-Na3.

The digestion process was moni tored for 2 wk. Operation was satisfactory, and the concentration of NTA-Na3 in the digester contents remained near 20 mg/1.

The percent of waste-activated sludge in. A study of the factors which influence metal removal in the activated sludge process.

Effect of mixed liquor suspended solids concentration on the biodegradation of nitrilotriacetic acid in the activated sludge process.

Degradation of a model naphthenic acid by nitrilotriacetic acid – modified Fenton process. Chemical Engineering Journal, DOI: / Tim Leshuk, Timothy Wong, Stuart Linley, Kerry M.

Peru, John V. Headley, Frank Gu. Solar photocatalytic degradation of naphthenic acids in oil sands process-affected water. Nitrilotriacetic acid (NTA) is the aminopolycarboxylic acid with the formula N(CH 2 CO 2 H) 3.

It is a colourless solid that is used as a chelating agent, which forms coordination compounds with metal ions (chelates) such as Ca 2+, Co 2+, Cu 2+, and Fe 3+. Optimum 14CO2 evolution was observed at a pH value between 7 and 8 and at room temperature.

Degradation of NH4Fe-[C]EDTA was stimulated by the addition of either unlabeled NaFe-EDTA, nitrilotriacetic acid or ethylenediamine, and inhibited by the addition of a variety of different sugars and amino acids. Trichloroethene (TCE) degradation by Fe(III)- activated calcium peroxide (CP) in the presence of citric acid (CA) in aqueous solution was investigated.

The results demonstrated that the presence of CA enhanced TCE degradation significantly by increasing the concentration of soluble Fe(III) and promoting H2O2 generation. The generation of HO• and O 2 – • in both the CP/Fe(III) and CP/Fe. [Nitrilotriacetic acid (NTA)--properties and environmental behavior.

Ecotoxicity and biodegradability of NTA in the environment]. and the effects of the processes taking place in water treatment systems destined for providing drinking water on NTA degradation are described. In a summary of the results of monitoring studies conducted in. Activated sludge samples produced 70–90 mg ECP/(g SS) compared with 10–20 mg ECP/(g SS) for granular sludge.

A relationship between the concentration of ECP extracted and the surface charge of. Nitrilotriacetic Acid is a white, crystalline solid compound. Nitrilotriacetic acid is mainly used as a chelating and eluting agent and is found in laundry detergents.

Exposure to Nitrilotriacetic acid irritates the skin, eyes and respiratory tract and causes kidney and bladder damage. zymatic activity Nitrilotriacetic acid (NTA) degradation in a full-scale treatment plant was modeled using the IAWPRC single-sludge model, extended to include adsorption of NTA onto biomass Degradation accounted for up to 97% of the NTA removed for influent concentrations from 3 to 15 mg/L.

Maria and Ognean32 used a combined parameter. In this study, two types of sewage sludge (primary sludge and waste activated sludge) were hydrothermally treated at – °C to enhance the lipid extraction efficiency and obtain a higher biodiesel yield.

The enhanced efficiency of the lipid extraction method was compared with the efficiency of the organic solvent extraction method.

The results confirmed that a hydrothermal. Comparison of Nitrilotriacetic Acid and [S,S]-Ethylenediamine-N,N′-disuccinic Acid in UV–Fenton for the Treatment of Oil Sands Process-Affected Water at Natural pH. Environmental Science & Technology50 (19), The genes for degradation of short chain alkyl methyl ketones 30 min, 4°C).

All further steps were done at room temperature. The supernatant (18 ml) was added to ml of Ni-nitrilotriacetic acid (NTA)-agarose resin (QIAGEN GmbH) in a column by using gravity flow. Degradation of 4-amylphenol and 4-hexylphenol by a new activated sludge.

Sodium disilicate (SD), an inorganic and environmentally friendly ligand, is introduced into the conventional iron electrolysis system to achieve an oxidizing Fenton process to degrade organic pollutants. Electrolytic ferrous ions, which are complexed by the disilicate ions, can chemically reduce dioxygen molecules via consecutive reduction steps, producing H2O2 for the Fenton-oxidation of.

Biodegradabilities of chelating agents were tested with activated sludge. Ethylenediaminetetraacetic acid (EDTA) remained intact in the effluent even after acclimation for days, but propanediamine-N,N′-disuccinic acid (PDDS) and nitrilotriacetic acid (NTA) were biodegraded after acclimation for 5 and 23 days, l isomers of ethylenediamine-N,N′-disuccinic acid.

Industrial latex sludge as raw material was made into sulfonated latex sludge (SLS) and latex sludge active carbon (LSC) adsorbents by sulfonate and pyrolysis treatment to remove textile dye cationic blue X-GRRL from aqueous solution.

The adsorption properties of SLS and LSC for X-GRRL were studied and compared by investigating the experimental parameters such as adsorbents. Ethylenediaminetetraacetic acid (EDTA), also known by several other names, is a chemical used for both industrial and medical was synthesised for the first time in by Ferdinand Münz.

It is an aminopolycarboxylic acid and a colourless, water-soluble solid. Its conjugate base is is widely used to dissolve limescale. Activated sludge was used as the source of microbes for the dioxane degradation experiments, and the presence of THF was required for dioxane degradation.

THF is more likely to be utilized by microorganisms than dioxane. Although THF is an environmental pollutant, activated sludge can completely degrade it. nitrilotriacetic acid. Single step kinetic models were shown to provide erroneous concentration of mg/L, which could be expected in batch activated sludge processes, oleic acid inhibited biodegradation completely.

Kinetics. The growth kinetic parameters of Sphaerotilus natans were evaluated aerobic degradation of PHA from other. sit ). In Canada and Switzerland, nitrilotriacetic acid makes up about 15% of laundry detergents; the load in raw wastewater was measured at 2, μg/L in Canada and to 1, μg/L in Swit-zerland (Bucheli-Witschel and Egli ).

In well-adapted activated sludge systems, nitrilotriacetic acid is readily biodegraded. In soil, it. The mechanism of acute nephrotoxicity of an iron chelate in vivo has been investigated.

Administration of a renal carcinogen ferric nitrilotriacetate (Fe-NTA) (15 mg Fe/kg bw, ip) led to selective loss of a renal protein with an apparent molecular mass of 17 kDa.

examined the performance of an activated sludge unit treating 4-chlorophenol (CP). Increasing sludge age enhanced 4-CP removal. Snyder et al.

(a) studied the kinetics of 2,4,6-trichlorophenol (TCP) biodegradation by an acclimated microbial culture from the aeration basin of a wastewater treatment plant. The specific rate constant was.Aerobically NTA-acclimatised waste activated sludge caused NTA acid concentrations to fall from mg/L to less than mg/L in days with d lag time.

Degradation after further addition of NTA acid after up to 30 days of hiatus proceeded rapidly due to a memory effect.Degradation of oxcarbazepine by UV-activated persulfate oxidation: kinetics, mechanisms, and pathways. The reactions of ozone with tertiary amines including the complexing agents nitrilotriacetic acid (NTA) and Fate and distribution of pharmaceuticals in wastewater and sewage sludge of the conventional activated sludge (CAS) and.

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