COD fractionation and biological treatability of mixed industrial wastewaters

A low-cost wastewater disposal system was commissioned in 1959 to treat domestic and industrial wastewaters generated in the Latrobe River valley in the province of Gippsland, within the State of Victoria, Australia (Figure 1). The Latrobe Valley is the centre for large-scale generation of electricity and for the production of pulp and paper. In addition other industries have utilized the brown coal resource of the region e.g. gasification process and char production. Consequently, industrial wastewaters have been dominant in the disposal system for the past twenty-five years. The mixed industrial-domestic wastewaters were to be transported some eighty kilometres to be treated and disposed of by irrigation to land. Several important lessons have been learnt during twenty-five years of operating this system. Firstly the composition of the mixed waste stream has varied significantly with the passage of time and the development of the industrial base in the Valley, so that what was appropriate treatment in 1959 is not necessarily acceptable in 1985. Secondly the magnitude of adverse environmental impacts engendered by this low-cost disposal procedure was not imagined when the proposal was implemented. As a consequence, clean-up procedures which could remedy the adverse effects of twenty-five years of impact are likely to be costly. The question then may be asked - when the total costs including rehabilitation are considered, is there really a low-cost solution for environmentally safe disposal of complex wastewater streams?

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Management and Status of Japanese Public Waters

Water Science & Technology ◽

10.2166/wst.1991.0395 ◽

1991 ◽

Vol 23 (1-3) ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

Takeshi Goda

Keyword(s):

Water Quality ◽

Coastal Waters ◽

Industrial Wastewater ◽

Quality Standards ◽

Water Bodies ◽

Industrial Wastewaters ◽

Quality Of Water ◽

Japanese Rivers ◽

Per Capita

The management and status of public water bodies in Japan is discussed. The environmental quality standards which have been set and the levels of compliance with these standards are shown. The water quality of Japanese rivers, lakes, reservoirs, wetlands and coastal waters is described, and eutrophication problems are mentioned. The effects of changes in population density and levels of recycling of industrial wastewaters on the quality of water bodies are discussed. Almost 75% of industrial wastewater is now recycled. Per capita availability of freshwater in Japan is comparatively low, and the construction of 530 dams, in addition to the 2393 dams already in operation, is planned. Irrigation effluents from paddy fields are a major factor which influences river water quality in Japan. The improvement of water quality using various methods is discussed.

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TREATABILITY OF 2,4-D PRODUCTION WASTEWATERS

Water Science & Technology ◽

10.2166/wst.1994.0067 ◽

1994 ◽

Vol 30 (3) ◽

pp. 73-78 ◽

Cited By ~ 3

Author(s):

O. Tünay ◽

S. Erden ◽

D. Orhon ◽

I. Kabdasli

Keyword(s):

Hydrogen Peroxide ◽

Activated Sludge ◽

Partial Oxidation ◽

Chloride Concentration ◽

Chemical Oxidation ◽

Cod Removal ◽

Optimum Conditions ◽

Organic Loading ◽

Activated Sludge System ◽

Biological Treatability

This study evaluates the characterization and treatability of 2,4-D production wastewaters. Wastewaters contain 20000-40000 mg/l COD, 17000-30000 mg/l chloride and pH is around 1.0. Chemical oxidation with hydrogen peroxide provided almost complete COD removal. The optimum conditions are 3:1 H2O2/COD oxidant dosage, 3000 mg/l Fe3+ as catalyst and pH 3. Partial oxidation at 0.5:1 H2O2//COD ratio is also effective providing 67% COD removal. A batch activated sludge system is used for biological treatability. Dilution is needed to maintain a tolerable chloride concentration which increases through COD removal. pH also increased during COD removal. 85% COD removal is obtained for the 50% dilution at an organic loading of 0.3 day‒1 on a COD basis. Completely and partially oxidized wastewaters are also treated in the activated sludge down to 30 mg/l BOD5.

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The effect of heterotrophic yield on the assessment of the correction factor for anoxic growth

Water Science & Technology ◽

10.2166/wst.1996.0536 ◽

1996 ◽

Vol 34 (5-6) ◽

pp. 67-74 ◽

Cited By ~ 19

Author(s):

D. Orhon ◽

S. Sözen ◽

N. Artan

Keyword(s):

Correction Factor ◽

Domestic Sewage ◽

Yield Coefficient ◽

Heterotrophic Growth ◽

Metabolic Processes ◽

Anoxic Conditions ◽

Industrial Wastewaters ◽

Systems Modelling ◽

Kinetics Of ◽

Very High

For single-sludge denitrification systems, modelling of anoxic reactors currently uses the kinetics of aerobic heterotrophic growth together with a correction factor for anoxic conditions. This coefficient is computed on the basis of respirometric measurements with the assumption that the heterotrophic yield remains the same under aerobic and anoxic coditions. The paper provides the conceptual proof that the yield coefficient is significantly lower for the anoxic growth on the basis of the energetics of the related metabolic processes. This is used for the interpretation of the very high values for the correction factor experimentally determined for a number of industrial wastewaters. A default value for the anoxic heterotrophic yield coefficient is calculated for domestic sewage and compatible wastewaters and proposed for similar evaluations.

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Adsorption of Lead from Industrial Wastewaters using Sterculia Foetida Shell Activated Carbon

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2017.8145 ◽

2017 ◽

Vol V (VIII) ◽

pp. 1034-1038

Author(s):

Swarnotpal Kashyap

Keyword(s):

Activated Carbon ◽

Industrial Wastewaters

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Polyhydroxyalkanoates production from industrial wastewaters using a mixed culture enriched with Thauera sp.: Inhibitory effect of the wastewater matrix

Environmental Technology & Innovation ◽

10.1016/j.eti.2020.101328 ◽

2021 ◽

Vol 21 ◽

pp. 101328

Author(s):

Pravesh Tamang ◽

Carmen Arndt ◽

Johanna Bruns-Hellberg ◽

Regina Nogueira

Keyword(s):

Mixed Culture ◽

Inhibitory Effect ◽

Industrial Wastewaters

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Performance of an anaerobic baffled reactor (ABR) as a hydrolysis-acidogenesis unit in treating landfill leachate mixed with municipal sewage

Water Science & Technology ◽

10.2166/wst.2000.0253 ◽

2000 ◽

Vol 42 (12) ◽

pp. 115-121 ◽

Cited By ~ 13

Author(s):

B. Wang ◽

Y. Shen

Keyword(s):

Landfill Leachate ◽

Loading Rate ◽

Granular Sludge ◽

Operational Performance ◽

Municipal Sewage ◽

Organic Loading Rate ◽

Stable Operation ◽

Organic Loading ◽

Anaerobic Baffled Reactor ◽

Biological Treatability

A study on the performance of an Anaerobic Baffled Reactor(ABR) as a hydrolysis-acidogenesis unit in treating the mixed wastewater of landfill leachate and municipal sewage in different volumetric ratios was carried out. The results showed that ABR substantially improved the biological treatability of the mixed wastewater by increasing its BOD5/COD ratio to 0.4–0.6 from the initial values of 0.15–0.3. The formation of bar-shaped granular sludge of 0.5–5 mm both in diameter and length with an SVI of 7.5–14.2 ml/g was observed in all compartments of the ABR when the organic loading rate reached 4.71 kgCOD/m3 · d. The effects of the ratios of NH4+-N/COD and COD/TP in mixed wastewater on the operational performance were also studied, from which it was found that a reasonable NH4+-N/COD ratio should be lower than 0.02, and the phosphorus supplement was needed when the volumetric ratio was higher than 4:6 for stable operation of ABR.

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