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Application of the wet oxidation process to the treatment of municipal sewage sludge


, : Application of the wet oxidation process to the treatment of municipal sewage sludge. Environmental Technology 21(10): 1193-1198, October

Wet oxidation (WO) technology is an alternative to normally accepted methods of sewage sludge treatment and discharge. This can comply with environmental standards. The results of tests carried out on a continuous-feed pilot unit, treating municipal sewage sludge, highlight the significant influence of the temperature in the oxidation reactor where a COD removal efficiency greater than 80% can be achieved at 300degreeC without any catalyst addition. Tests have also revealed that at temperatures around 240degreeC, foaming can seriously impair the operation of the reactor, because of the presence of non-degraded fatty compounds and surfactants. Some compounds present from the outset or produced in the reactor are resistant to oxidation under subcritical conditions: such is the case of ammonia whose return to the wastewater treatment plant inlet creates an additional 20 to 30% load in relation to the nitrogen contained in the raw water. It is therefore essential to include specific biological treatment of the ammonia liquid phase or to adapt the design of the treatment plant for removing the ammonia released from WO. The study has revealed that the reaction temperature has a considerable effect on the volatile matter content of the final solid waste: it is evident that, given the expected evolution of regulations governing thermal process, WO units will have to be operated in such a way as to reduce the impact of these by-products to a minimum, and to study ways in which they might be reused.

US$19.90

DOI: 10.1080/09593332108618040


Other references

Perry, L.J.J.; Larson, K.L., 1974: Influence of drought on tillering and internode number and length in alfalfa. In glasshouse trials with lucerne cv. Vernal, Sonora, Travois and Lahontan, stem number/plant, number of internodes/stem and individual internode length of primary stem were markedly lower at a soil water content of 49% of field capacity that at 1...

Muhammad, S.R.; Abbas, S.Z.; Abbas, S.Q., 1999: Management of gall stones: the current perspective. Jpma. Journal of the Pakistan Medical Association 48(7): 208-211

Kawakami, M., 1955: Training effect and electro-myogram. I. Spatial distribution of spike potentials. Japanese Journal of Physiology 5(1): 1-8

Longefait, H.; Hartung, L., 1960: Gebauer's operation for cicatricial tracheal stenosis. Le Poumon et le Coeur 16: 145-149

Hwang, T.; Kim, M.; Hwangbo, M.; Oh, E., 2015: Comparative analysis of cognitive tasks for modeling mental workload with electroencephalogram. Previous electroencephalogram (EEG) studies have shown that cognitive workload can be estimated by using several types of cognitive tasks. In this study, we attempted to characterize cognitive tasks that have been used to manipulate workload for g...

Sun, D.; Seki, G.; Uwatoko, S.; Nakao, A.; Goto, A.; Fujita, T.; Kimura, S.; Taniguchi, S., 2002: Quantifying porphobilinogen deaminase mRNA in microdissected nephron segments by a modified RT-PCR. Background: Quantifying mRNA levels by reverse transcription-polymerase chain reaction (RT-PCR), although widely exercised, is still difficult. Methods: A modified quantitative RT-PCR in which genomic DNA was used as standard was developed. The qu...

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Warren Paul H.; Kallemeyn Gregory W., 1992: Ureilites; the graphite f(O (sub 2) ) buffer, explosive volcanism, and the gross dissipation of basalt from the parent asteroid(s). Abstracts of Papers Submitted to the Lunar and Planetary Science Conference: ages 1497-1498. 1992.

Kuussaari, M.; Heliola, J.; Niininen, I., 2003: Results of the butterfly monitoring scheme in Finnish agricultural landscapes for the year 2002 Maatalousympariston paivaperhosseurannan vuoden 2002 tulokset. Monitoring of butterflies in Finnish agricultural land scapes continued for the fourth year. In 37 transects (Table 1), a total of 48147 butterflies were recorded from 62 species (Table 2). On average the total number of recorded individuals was 4...

Hasnain, Si, 1996: Factors controlling suspended sediment transport in Himalayan glacier meltwaters. Suspended sediment concentration was determined both on the rising and falling limbs of the flow hydrograph between 28 August and 21 September 1992 and 23 October to 17 November 1993 within a 600 m reach of the Dokriani Glacier portal, Ganga basin...