Effect of air-flow rate and turning frequency on bio-drying of dewatered sludge

Zhao, Ling; Gu, Wei-Mei; He, Pinjing; Shao, Liming

doi:10.1016/j.watres.2010.07.002

Cited by 132 publications

(90 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sludge bio-drying, derived but different from sludge composting, was considered as an innovative treatment of sludge with high moisture content (MC) through the aerobic degradation of organic substances along with aeration and turning to evaporate water (Zhao et al, 2010). The primary purpose of sludge bio-drying was for the sludge reduction through MC reduction, different from that of composting was resource utilization and full stabilization (Zhao et al, 2010(Zhao et al, , 2011.…”

Section: Introductionmentioning

confidence: 99%

“…The primary purpose of sludge bio-drying was for the sludge reduction through MC reduction, different from that of composting was resource utilization and full stabilization (Zhao et al, 2010(Zhao et al, , 2011. Such difference leads to the completely different process goals and operation parameters between sludge bio-drying and composting.…”

Section: Introductionmentioning

confidence: 99%

“…Such difference leads to the completely different process goals and operation parameters between sludge bio-drying and composting. For instance, MC should be kept 50e60% to realize the full stabilization of organic matter during sludge composting (Zhao et al, 2010), while the MC should be removed as much as possible in the shortest time for sludge bio-drying. Furthermore, there was no maturation phase for sludge bio-drying, it was no more than enhanced physical aeration after cooling phase to maximize the MC reduction , resulting in much higher energy consumption for sludge bio-drying.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sludge bio-drying: Effective to reduce both antibiotic resistance genes and mobile genetic elements

et al. 2016

View full text Add to dashboard Cite

a b s t r a c tSewage sludge is considered as one of major contributors to the increased environmental burden of ARGs. Sludge bio-drying was increasingly adopted due to its faster sludge reduction compared with composting. The fate of ARGs during full-scale sludge bio-drying was investigated to determine whether it could effectively reduce ARGs, and the contributions of bacterial community, horizontal gene transfer (HGT) through mobile genetic elements (MGEs) and co-selection from heavy metals to ARGs profiles were discussed in detail. Two piles with different aeration strategies (Pile I, the improved and Pile II, the control) were operated to elucidate effects of aeration strategy on ARGs profiles. Results showed that sludge bio-drying could effectively reduce both most of targeted ARGs (0.4e3.1 logs) and MGEs (0.8e3.3 logs) by the improved aeration strategy, which also enhanced both the sludge bio-drying performance and ARGs reduction. The enrichment of ARGs including ermF, tetX and sulII could be well explained by the evolution of bioavailable heavy metals, not HGT through MGEs, and their potential host bacteria mainly existed in Bacteroidetes. Although changes of bacterial community contributed the most to ARGs profiles, HGT through MGEs should be paid more attention especially in the thermophilic stage of sludge bio-drying.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sludge bio-drying: Effective to reduce both antibiotic resistance genes and mobile genetic elements

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Temperature monitoring indicated that the piles experienced a mesophilic phase (temperature increasing phase), an initial thermophilic phase (with a pile temperature higher than 50°C), a second thermophilic phase (after the turning of the pile on day 9, the pile temperature dropped and then rebounded), and a cooling phase. To ensure the representativeness and avoid damaging the biodrying piles, samples were collected from the top, middle, and bottom of the piles, and then mixed for analysis (Zhao et al, 2010). Samples were collected using a remote-controlled sampling vehicle, running on tracks over the piles (CTB, GreenTech Environmental Engineering Co., Beijing, China).…”

Section: Experimental Procedures 221 Sewage Sludge Biodryingmentioning

confidence: 99%

“…Mechanical controls, such as aeration and turning, propel the process. The effects of airflow and turning regime on bio-drying of sewage sludge indicated that forced aeration improved evaporation, while frequent turning hindered the biodrying (Zhao et al, 2010;Cai et al, 2012). Bacterial analysis showed that during the thermophilic phase, in which Acinetobacter and Bacillus were the dominant genera, the rates of water evaporation, water generation, and organic degradation peaked (Cai et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Structure modification and extracellular polymeric substances conversion during sewage sludge biodrying process

Cai

Krafft

Chen

et al. 2016

Bioresource Technology

View full text Add to dashboard Cite

Assessment of a solar‐assisted infrared timber drying system

Aktaş

Ceylan

Ergün

et al. 2017

Env Prog and Sustain Energy

View full text Add to dashboard Cite

This study investigates convective‐infrared drying characteristics of timber. The biggest disadvantage of infrared heating systems is the uncontrollable rise of the surface temperature up to extremely high values, which causes damage to the product. In this study, the power of an infrared system was controlled and adjusted according to the surface temperature of the product. In doing so, the surface temperature of the infrared heater was prevented from reaching up to values that could damage the product. During the analysis, the surface temperature of the timbers was kept at an average of 65°C, while the bottom temperature was kept at an average of 45°C. The air collector used in the system was found to be 50% efficient. At the end of a 13‐h drying period, the moisture content of pine timbers could be reduced from 1.42 to 0.0948 g water/g dry matter. During the system analysis, parameters such as moisture content, mass diffusion coefficient, and useful energy rate were taken into consideration. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1875–1881, 2017

show abstract

Effect of air-flow rate and turning frequency on bio-drying of dewatered sludge

Cited by 132 publications

References 25 publications

Sludge bio-drying: Effective to reduce both antibiotic resistance genes and mobile genetic elements

Sludge bio-drying: Effective to reduce both antibiotic resistance genes and mobile genetic elements

Structure modification and extracellular polymeric substances conversion during sewage sludge biodrying process

Assessment of a solar‐assisted infrared timber drying system

Contact Info

Product

Resources

About