Sludge treatment: Current research trends

Zhang, Quanguo; Hu, Jianjun; Lee, Dong Hoon; Chang, Yu-Hern; Lee, Yu–Jen

doi:10.1016/j.biortech.2017.07.070

Cited by 332 publications

(120 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In WWTPs, the disposal of waste sludge is energy-intensive and costly, accounting for 20-30% of total energy consumption (Figure 1.4) and 25-65% of total operation costs (Liu and Tay, 2001). Moreover, heavy metals and pathogenic microbe in WAS will cause serious concerns on potential environmental risks if not treated appropriately (Zhang et al, 2017). Therefore, the development of strategies for efficient and economic disposal of WAS is urgently needed.…”

Section: Estimation Of Ghg Emissions In Wwtpsmentioning

confidence: 99%

See 1 more Smart Citation

Energy use and challenges in current wastewater treatment plants

Ma¹

2020

A-B Processes: Towards Energy Self-Sufficient Municipal Wastewater Treatment

View full text Add to dashboard Cite

Section: Estimation Of Ghg Emissions In Wwtpsmentioning

confidence: 99%

“…Volume reduction, non-toxicity and energy/resource recovery are the directive principles for waste sludge management (Zhang et al, 2017). Landfill, sludge dewatering/concentration and incineration are the commonly used techniques for waste sludge treatment.…”

Section: Current Technologies For Waste Sludge Treatmentmentioning

confidence: 99%

Energy use and challenges in current wastewater treatment plants

Ma¹

2020

A-B Processes: Towards Energy Self-Sufficient Municipal Wastewater Treatment

View full text Add to dashboard Cite

“…A great amount of sludge is produced as a byproduct in wastewater treatment plants all over the world. Of this material, approximately 45 million tons of dry sludge are produced per annum [2]. In addition to water and organic compounds, sludge treatment streams contain considerable amounts of hazardous elements, such as pharmaceuticals, as well as contaminants from industrial sources, such as metal plating facilities, mining operations, fertilizer industries, chloralkali facilities, radiator manufacturing, smelting, alloy industries, tanneries, battery production, paper industries, body care products, detergents, and pesticides; these industrial sites are the initial sources of heavy metals in wastewater treatment plants.…”

Section: Introductionmentioning

confidence: 99%

Steam Explosion Pretreatment of Sludge for Pharmaceutical Removal and Heavy Metal Release to Improve Biodegradability and Biogas Production

et al. 2020

View full text Add to dashboard Cite

Steam explosion pretreatment was developed and evaluated to remove pharmaceuticals and heavy metals from wastewater sludge and to improve its biodegradability and methane yield. Effects of pressure (5–15 bar) and duration (1–15 min) during the pretreatment were examined, and the pretreatment efficiency was evaluated based on the solubilization degree, the capillary suction time (CST) test and anaerobic digestion. The removal efficiency of ibuprofen, acetaminophen, and amoxicillin was 65%, 69%, and 66% and 70%, 66%, and 70% in primary sludge (PS) and waste-activated sludge (WAS), respectively. The highest percent release efficiency of heavy metals, i.e., lead, cadmium, and silver, for PS and WAS was 78%, 70%, and 79% and 79%, 80%, and 75%, respectively. The highest methane yield was obtained after pretreatment at 10 bar for 15 min and at 15 bar for 10 min, with respective yields of 380 and 358 mL CH4/g volatile solids (VS) for the PS and 315 and 334 mL CH4/g VS for the WAS. The results of methane production indicated that the decreased concentrations of pharmaceuticals and heavy metals resulted in increased biodegradability of PS and WAS.

show abstract

“…At a high temperature (>700 • C), organic substances are oxidized to simple inorganic compounds-mainly carbon dioxide and water. However, there is a risk of the formation of compounds more harmful for the environment, for example, carbon monoxide, sulphur, and nitrogen oxides [13]. A decrease in their emission during thermal processing can be achieved, among other things, via the co-incineration of sludge with other energetic materials (coal, crude oil) [14].…”

Section: Introductionmentioning

confidence: 99%

The Use of Artificial Neural Networks and Decision Trees to Predict the Degree of Odor Nuisance of Post-Digestion Sludge in the Sewage Treatment Plant Process

2019

View full text Add to dashboard Cite

This paper presents the application of artificial neural networks and decision trees for the prediction of odor properties of post-fermentation sludge from a biological-mechanical wastewater treatment plant. The input parameters were concentrations of popular compounds present in the sludge, such as toluene, p-xylene, and p-cresol, and process parameters including the concentration of volatile fatty acids, pH, and alkalinity in the fermentation sludge. The analyses revealed that the implementation of artificial neural networks allowed the prediction of the values of odor intensity and the hedonic tone of the post-fermentation sludge at the level of 30% mean absolute percentage error. Application of the decision tree made it possible to determine what input parameters the fermentation feed should have in order to arrive at the post-fermentation sludge with an odor intensity <2 and hedonic tone >−1. It was shown that the aforementioned phenomenon was influenced by the following factors: concentration of p-xylene, pH, concentration of volatile fatty acids, and concentration of p-cresol.

show abstract

Sludge treatment: Current research trends

Cited by 332 publications

References 91 publications

Energy use and challenges in current wastewater treatment plants

Energy use and challenges in current wastewater treatment plants

Steam Explosion Pretreatment of Sludge for Pharmaceutical Removal and Heavy Metal Release to Improve Biodegradability and Biogas Production

The Use of Artificial Neural Networks and Decision Trees to Predict the Degree of Odor Nuisance of Post-Digestion Sludge in the Sewage Treatment Plant Process

Contact Info

Product

Resources

About