Combined sludge conditioning of micro-disintegration, floc reconstruction and skeleton building (KMnO 4 /FeCl 3 /Biochar) for enhancement of waste activated sludge dewaterability

Wu, Yan; Zhang, Panyue; Zeng, Guangming; Li, Jianbo; Ye, Jie; Zhang, Haibo; Fang, Wei; Li, Yifu; Fang, Yunhao

doi:10.1016/j.jtice.2017.02.004

Cited by 60 publications

(27 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The moisture content of non-conditioned sewage sludge decreased of only 3.4% after pressure filtration and by approximately 9.2-9.6% after vacuum filtration. Low filterability of raw sewage sludge was also proved by Wu et al [60], who achieved only 5% reduction of sludge moisture content. Yang et al [61] showed that non-conditioned sewage sludge decreased the moisture content after dewatering by 3%.…”

Section: The Influence Of Wood Biomass Ash On Sewage Sludge Dewaterinmentioning

confidence: 76%

“…Additionally, sewage sludge after conditioning by means of wood biomass ashes remains permeable and porous under high pressure [37,66,67]. The addition of wood ash into sewage sludge also contributes to the change of its structure and improves the transport of sludge [60].…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, in order to achieve desirable improvement of sewage sludge dewatering, high dosages of wood ashes are often required. Very high dosages of skeleton builders can increase sludge weight, which influence the subsequent sludge transportation and disposal [60].…”

Section: Discussionmentioning

confidence: 99%

“…resulted in the decrease of sludge moisture content by approximately 30%. According to Wu et al [60], ashes are only neutral materials which influence only the strength of flocs and the improvement of permeability of sludge. For this reason, their influence the improvement of sludge dewatering might be lower than chemical reagents.…”

Section: The Influence Of Wood Biomass Ash On Sewage Sludge Dewaterinmentioning

confidence: 99%

See 3 more Smart Citations

The Use of Wood Biomass Ash in Sewage Sludge Treatment in Terms of Its Agricultural Utilization

Wójcik

Stachowicz

Masłoń

2018

Waste Biomass Valor

View full text Add to dashboard Cite

Due to inappropriate agricultural treatments, soils often turn into wastelands. After years, the return to cultivation is very difficult or even impossible. It is a serious problem for agriculture, also in Poland. In order to improve soil quality and to restore its value in use, different fertilizers are commonly used. As an alternative for artificial fertilizers, sewage sludge and biomass ashes might be applied. High cost of sewage sludge conditioning with the use of polyelectrolytes has resulted in the development of research dedicated to finding new and inexpensive conditioners. The article discusses the possibility of sludge conditioning by means of wood biomass ash. In the paper, the findings of sewage sludge dewatering with the use of wood ash on a laboratory and on a technical scale are presented. The analysis of results has shown that the addition of wood biomass ash improved sludge dewatering by 10-23% in a laboratory scale and by 15-27% on a technical scale. The application of wood ash also reduced the total bacteria number by 83-89% in a laboratory scale and by 40-53% on a technical scale. Additionally, the obtained mixture of sewage sludge and wood biomass ash might be applied in agricultural practices, especially in fertilizing perennial plants plantations. Thanks to that it is possible to obtain inexpensive and valuable natural fertilizer while reducing costs of sludge dewatering. Keywords Sewage sludge • Wood biomass ashes • Dewatering • Conditioning • Higienization • Fertilizer Additionally, the final product of sludge dewatering, namely the mixture of sewage sludge and wood ash, can be used as a natural fertilizer improving the plant growth. The sewage sludge conditioning by means of wood biomass ashes and the possibility of the application of mixture is a new solution in sewage sludge management.

show abstract

Section: The Influence Of Wood Biomass Ash On Sewage Sludge Dewaterinmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: The Influence Of Wood Biomass Ash On Sewage Sludge Dewaterinmentioning

confidence: 99%

See 2 more Smart Citations

The Use of Wood Biomass Ash in Sewage Sludge Treatment in Terms of Its Agricultural Utilization

Wójcik

Stachowicz

Masłoń

2018

Waste Biomass Valor

View full text Add to dashboard Cite

show abstract

“…Chen et al [20] analysed sewage sludge conditioned with fly ash from hard coal combustion, and, for the dose of about 100 g/dm 3 , obtained over a 75% reduction in specific resistance to filtration. Furthermore, Wu et al [40] added ash from combustion of rice husks with the dose of 7 g/dm 3 to sewage sludge and reached ca. 45% drop in SRF.…”

Section: Resultsmentioning

confidence: 99%

Examinations of the Effect of Ashes from Coal and Biomass Co-combustion on the Effectiveness of Sewage Sludge Dewatering

Wójcik¹

2018

Eng. Prot. Environ.

View full text Add to dashboard Cite

Badania wpływu popiołów ze współspalania węgla i biomasy na efektywność procesu odwadniania osadów ściekowychHigh water content and the associated large volume of waste represent a challenge to final disposal of sewage sludge. For this reason, dewatering is one of the most important stages in sewage sludge treatment. However, sewage sludge dewatering is also the most expensive and least explored process. The specific physical and chemical properties of raw sewage sludge make it impossible to obtain satisfactory dewatering effects without primary processing. Water removal efficiency can be improved with sludge conditioning by means of various technologies. Chemical conditioning, which consists in dosing organic flocculants, has been commonly used in wastewater treatment plants. Application of polyelectrolytes to sludge in order to improve its dewaterability generates high operating costs in sewage treatment plants, amounting even to several thousand PLN a month. The economic aspects have driven the development of the research on intensification of sewage sludge dewatering using various materials, including waste. Conditioning of sewage sludge with fuel combustion by-products represents an alternative to commonly used technologies. The paper presents the effect of by-products of co-combustion of hard coal and plant biomass on the efficiency of sewage sludge dewatering. The effect of ash on capillary suction time (CST), water content and specific resistance to filtration was discussed. Physical conditioning of sewage sludge led to the decrease in CST, specific resistance to filtration (SRF) and water content. An increase in filtrate volume after pressure filtration was also observed. The results obtained in the study showed that addition of waste can represent an alternative method of sewage sludge conditioning.

show abstract

Application of Biochar for Sludge Dewatering

Ge,,

Zhu,

et al. 2023

Biochar Applications for Wastewater Treatment

View full text Add to dashboard Cite

Combined sludge conditioning of micro-disintegration, floc reconstruction and skeleton building (KMnO 4 /FeCl 3 /Biochar) for enhancement of waste activated sludge dewaterability

Cited by 60 publications

References 33 publications

The Use of Wood Biomass Ash in Sewage Sludge Treatment in Terms of Its Agricultural Utilization

The Use of Wood Biomass Ash in Sewage Sludge Treatment in Terms of Its Agricultural Utilization

Examinations of the Effect of Ashes from Coal and Biomass Co-combustion on the Effectiveness of Sewage Sludge Dewatering

Application of Biochar for Sludge Dewatering

Contact Info

Product

Resources

About