Biological reactivity of residual wastes and dependence on the duration of pretreatment

Binner, Erwin; Zach, A.

doi:10.1034/j.1399-3070.1999.00073.x

Cited by 8 publications

(12 citation statements)

References 1 publication

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“…Furthermore, the presence of methane in the analysed gas was never veri®ed until the end of the test. The lack of formation of methane in the samples as such is therefore probably to be ascribed to the production of organic acids, which, by lowering the pH, inhibit the generation of methane, as shown also by studies carried out by Kugelman & Chin (1971), Barlaz et al (1993), Stegman (1997 and Binner & Zach (1998). It has been observed that with the biostabilized samples the generation of methane began after a few days in both the pilot and full-scale plants, and the presence of methane was detected, albeit in decreasing quantities, until the end of the tests.…”

Section: Process Parametersmentioning

confidence: 76%

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Biostabilization of mechanically separated municipal solid waste fraction

Adani¹,

Scatigna²,

Genevini³

2000

Waste Man Res

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Municipal solid waste was processed by a mechanical–biological end composting process both in pilot and full‐scale plants. The organic fraction obtained by mechanical treatment (fraction → < 50 mm) was processed at a high composting rate for 37 days followed by a curing phase of 79 days. Process parameters were registered and kept in an optimal range (oxygen > 140 ml l−1, temperature < 65°C, moisture > 500 g kg−1 w.w.). After the high‐rate phase, the products obtained showed a high degradation coefficient and good biological stability (ΔVS = − 54.75% and − 35.35%, DRI = 300 and 500 mg O2 kg−1 VS h−1, respectively, for pilot and full‐scale plants) especially for the pilot plant, indicating that it is not possible to obtain the same performance for a full‐scale plant as obtained under laboratory conditions. Nevertheless, the successive curing phase showed less of a discrepancy between the two processes (ΔVS = − 66.33% and − 56.87%, DRI = 280 and 360 mg O2 kg−1 VS h−1, respectively, for pilot and full scale plants). The quality of the stabilized product was tested by biogas production tests. As expected, a sample processed in the pilot plant produced less biogas (26 l kg TS−1) than that obtained at full scale (40 l kg TS−1). An unprocessed sample produced less biogas owing to the production of organic acids, which, by lowering the pH, inhibit the generation of gas.

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Section: Process Parametersmentioning

confidence: 76%

“…Nevertheless, respiration activity does not provide any information on residual biogas production, which remains the major impact factor of MSW land®lling. Therefore, residual biogas production tests have been developed and a correlation between the two parameters has been proposed (Binner & Zach 1998;Muller et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Biostabilization of mechanically separated municipal solid waste fraction

Adani¹,

Scatigna²,

Genevini³

2000

Waste Man Res

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“…Amongst these, the one that is certainly the most difficult to control is pH, of which the optimal values for the generation of methane are believed to be between 6.4 and 7.2, with a tolerance interval ranging from 6 to 9. The lack of formation of methane in the samples as such is therefore probably to be ascribed to the production of organic acids, which, by lowering the pH, inhibit the generation of methane, as shown also by studies carried out by Kugelman & Chin (1971), Barlaz et al (1993), Stegman (1997 and Binner & Zach (1998). 3.…”

Section: Process Parametersmentioning

confidence: 78%

“…This fraction could be used for refusederived fuel production after biodrying and mechanical refining processes. Therefore, residual biogas production tests have been developed and a correlation between the two parameters has been proposed (Binner & Zach 1998;Muller et al 1998). This fraction is subjected to biological treatment (aerobic) that reduces the impact before landfilling.…”

Section: Introductionmentioning

confidence: 99%

Biostabilization of mechanically separated municipal solid waste fraction

Adani¹,

Scatigna²,

Genevini³

2000

Waste Manag Res

View full text Add to dashboard Cite

Municipal solid waste was processed by a mechanicalbiological end composting process both in pilot and full-scale plants. The organic fraction obtained by mechanical treatment (fraction → < 50 mm) was processed at a high composting rate for 37 days followed by a curing phase of 79 days. Process parameters were registered and kept in an optimal range (oxygen > 140 ml 1 -1 , temperature < 65°C, moisture > 500 g kg -1 w.w.). After the high-rate phase, the products obtained showed a high degradation coefficient and good biological stability (ΔVS = -54.75% and -35.35%, DRI = 300 and 500 mg O 2 kg -1 VS h -1 , respectively, for pilot and full-scale plants) especially for the pilot plant, indicating that it is not possible to obtain the same performance for a full-scale plant as obtained under laboratory conditions. Nevertheless, the successive curing phase showed less of a discrepancy between the two processes (ΔVS = -66.33% and -56.87%, DRI = 280 and 360 mg O 2 kg -1 VS h -1 , respectively, for pilot and full scale plants).The quality of the stabilized product was tested by biogas production tests. As expected, a sample processed in the pilot plant produced less biogas (26 1 kg TS -1 ) than that obtained at full scale (40 1 kg TS -1 ). An unprocessed sample produced less biogas owing to the production of organic acids, which, by lowering the pH, inhibit the generation of gas.

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“…There is an increasing need to develop sustainable end‐uses for organic‐based waste products such as those produced by mechanical biological treatment (MBT) of municipal waste (Binner & Zach, 1999). Given the progressive decline in soil organic matter (Bellamy et al , 2005), it is preferable to find alternative land‐based disposal routes for this mixed waste ‘compost’.…”

Section: Introductionmentioning

confidence: 99%

Microbial diversity and activity are increased by compost amendment of metal-contaminated soil

Farrell

Griffith

Hobbs

et al. 2010

FEMS Microbiology Ecology

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Unlike organic pollutants, heavy metals cannot be degraded and can constitute a persistent environmental hazard. Here, we investigated the success of different remediation strategies in promoting microbial diversity and function with depth in an acidic soil heavily contaminated with Cu, Pb and Zn. Remediation involved the incorporation of either a high-or a low-quality compost or inorganic fertilizer into the topsoil and monitoring of microbial activity and diversity with soil depth over a 4-month period. While changes in topsoil microbial activity were expected, the possible effects on the subsurface microbial community due to the downward movement of metals, nutrients and/or soluble organic matter have not been examined previously. The results showed that both compost additions, especially the low-quality compost, resulted in significantly increased bacterial and fungal diversity (as assessed by terminal restriction fragment length polymorphism) and activity compared with the inorganic and control treatments in the topsoil. Although phospholipid fatty acid profiling indicated that compost addition had promoted enhanced microbial diversity in the subsoil, no concomitant increase in subsoil microbial activity was observed, suggesting that amelioration of the heavy metals remained localized in the topsoil. We conclude that although composts can successfully immobilize heavy metals and promote ecosystem diversity/function, surface incorporation had little remedial effect below the surface layer over the course of our short-term trial.

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Biological reactivity of residual wastes and dependence on the duration of pretreatment

Cited by 8 publications

References 1 publication

Biostabilization of mechanically separated municipal solid waste fraction

Biostabilization of mechanically separated municipal solid waste fraction

Biostabilization of mechanically separated municipal solid waste fraction

Microbial diversity and activity are increased by compost amendment of metal-contaminated soil

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