Treatability studies for on-site biological remediation of soils and leachates contaminated by coal conversion residuals and by-products

Brenner, Asher; Irvine, Robert L.; Ketchum, Lloyd H.; Kulpa, Charles F.; Moreau, Jerry P.

doi:10.1016/0304-3894(89)80007-x

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…The performance of a single aerobic SBR (designated SBR A) was examined in phase I. This reactor was inoculated with a biomass that had been adapted to coal gasification waste during a previous study (Brenner et al, 1989). The biomass was acclimated to the phenolic waste over a 2-week period using the operating strategy described in Table 3 and was subsequently operated at an organic loading of 0.27 g COD /g mixed liquor suspended solids (MLSS) • d for a period of 3 months using the same operating strategy.…”

Section: Methodsmentioning

confidence: 99%

Treatment of a high‐strength, mixed phenolic waste in an SBR

Brenner¹,

Chozick²,

Irvine³

1992

Water Environment Research

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Biological degradation of a synthetic mixture of several phenolic compounds typically found in coal conversion wastes was investigated in the sequencing batch reactor (SBR). The mixture contained phenol;zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA o-, m-, and p-cresols; and 2,3-and 3,4-dimethylphenols and had a total chemical oxygen demand (COD) concentration of 7750 mg/L. A variety of aerobic and anoxic control strategies were tested. A strategy that included an extended anoxic period resulted in the accumulation of byproducts that adversely affected removal efficiency and overall performance. In general, however, COD removal efficiencies were greater than 99%, with effluent COD concentrations averaging between 30 and 52 mg/L. Overdesign of the SBR (that is, hydraulic retention times in excess of that required for COD removal) resulted in the development of filamentous bacteria and poor settling characteristics in the reactor. This problem was eliminated or controlled either by introducing a short anoxic fill period or increasing the organic load.Removal patterns indicative of diauxic growth were observed. Conventional design approaches based on overall COD removal patterns and organic load must be applied cautiously and in conjunction with the removal patterns for individual components when used to design facilities that treat multicomponent toxic wastes. Water Environ. Res., 64, 128 (1992).

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Section: Methodsmentioning

confidence: 99%

Treatment of a high‐strength, mixed phenolic waste in an SBR

Brenner¹,

Chozick²,

Irvine³

1992

Water Environment Research

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“…No results were given for other contaminants. The applicability of an SBR to the remediation of a site is unclear, however the authors conclude that it is a good means of producing acclimated organisms (124). The bioremediation of creosote and pentachlorophenol sludges using an aerated, conical bioreactor has been reported (125).…”

Section: Bioreactors -For Both Soils and Groundwatersmentioning

confidence: 97%

“…The number of studies applied to a gasworks sites appears very limited. A screening study for the use of a sequencing batch reactor (SBR) to be integrated into an overall test system for the on site remediation of a coal conversion site has been reported (124). The reactor was used to determine the biodegradability of the wastes and as a means of producing specialised bacteria for use as soil innocula.…”

Section: Bioreactors -For Both Soils and Groundwatersmentioning

confidence: 99%

The microbial remediation of former gasworks sites: A review

Thomas

Lester

1993

Environmental Technology

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This review has considered the feasibility of applying current microbial treatment techniques to the remediation of former gasworks. Success would appear dependent upon the contaminants of interest being biodegradable and an effective means of implementation. Contaminants of concern at gasworks include PAH, phenols and cyanides. Laboratory and field studies suggest that these contaminants are biodegradable although little data exists with respect to mixtures in the form present at gasworks. Further research is recommended in this respect. Subsurface investigations of gasworks have revealed an extremely heterogeneous environment which suggests that current in situ remedial techniques may be unsuitable. Techniques that excavate and homogenise the contamination prior to treatment may improve the chances of successful remediation. Pilot studies appear successful but future research should emphasise a mass balance approach where the significance of non biological degradative mechanisms can be assessed. Contaminated groundwaters appear amenable to treatment in surface reactors. The success of overall remediation will however be dependent on the efficiency of the hydraulic withdrawal system used. The implementation of such a scheme should only be undertaken with a clear understanding of the limitations of this technology.

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“…This has been shown for the SBR for nitrogen removal, 3 -91516 biological phosphorus removal, 417 -18 the control of filaments, 3 -519 " 21 the removal of specific organics in industrial wastes, 22 and the destruction of hazardous waste. 6 " 8 - 23 The basic concept involved in organism selection is that the organism distribution is influenced by the following factors:…”

Section: Biological Description Of the Sbr 1 Backgroundmentioning

confidence: 99%