The biodrying concept: An innovative technology creating energy from sewage sludge

Winkler, Mari K.H.; Bennenbroek, M.H.; Horstink, F.H.; Loosdrecht, M.C.M. van; Pol, G.J. van de

doi:10.1016/j.biortech.2013.07.138

Cited by 108 publications

(31 citation statements)

References 21 publications

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“…The aeration strategy was the most important operation parameter for sludge bio-drying (Winkler et al, 2013;Navaee-Ardeh et al, 2010), and it had significant influences on the fate of ARGs in this study. The aeration rate increasing significantly along with sludge biodrying appeared to select for bacterial cells containing tetX which is specific to aerobes (Burch et al, 2014).…”

Section: Effects Of Aeration Strategy On the Fate Of Argsmentioning

confidence: 90%

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

et al. 2016

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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.

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Section: Effects Of Aeration Strategy On the Fate Of Argsmentioning

confidence: 90%

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

et al. 2016

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“…If an aerobic treatment is applied, the consumption is compared to the one of the aeration system [25]. On the other hand, bio-drying is a process that uses the heat produced by microorganisms [35]. However, sludge has an enormous potential to generate energy, which can not only supply the energy expenditure of its management, but also transform a WWTP into a surplus energy unit [36].…”

Section: Wastewater Treatment Energy Consumptionmentioning

confidence: 99%

Comparative Analysis of the Energy Consumption of Different Wastewater Treatment Plants

Soares¹

2017

IJAAA

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Abstract:Wastewater treatment is a process of intensive use of resources, mainly energy, which accounts for 15 to 40% of the operating costs in conventional wastewater treatment systems. With the expected demographic increase and the restrictive trend in quality standards for effluent discharge, the energy consumption tends to increase further if there are no changes in the processes. The literature gathers the energy consumption of different wastewater treatment systems, in an attempt to map the processes and to help the decision making in the search for better alternatives. One of these alternatives is the recovery of energy from the sewer. The conventional treatment system requires between 0.3 and 0.6 kWh/m 3 , while the energy contained in the wastewater may be up to 10 times of the one required for the treatment. The simultaneous wastewater treatment and power generation, called the hybrid treatment system, is a worldwide trend. In Brazil, recent studies have shown, through energy balances, the energy viability of anaerobic-aerobic systems, with the production of algae. This work presents a comparative review of the energy consumption of different wastewater treatment plants, aiming at a better understanding and management of the processes. The results showed that there are few Brazilian data published, indicating that the country still demands more studies on the subject to improve its processes. In the treatment of wastewater, most studies point to the aerobic process as the largest consumer of energy, and efforts are focused on the optimization of the conventional system, but still without great achievements. Environmental goals and water supply strategies are poorly integrated with the energy handling, leading to an inefficient use, and with economic and environmental consequences.

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“…Compared to thermal drying, no extra heat is required for biodrying (He et al, 2013). Biodrying, an alternative way to treat biomass waste, is an economical and energy-saving method that removes water from waste material using the microbial heat originating from organic matter degradation, which is based on a process similar to composting (Winkler et al, 2013). The moisture reduction during biodrying is as follows: water molecules evaporate from the SSBM surface into the air, after which the evaporated water is transported and removed by airflow (Velis et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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

Cai

Krafft

Chen

et al. 2016

Bioresource Technology

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The biodrying concept: An innovative technology creating energy from sewage sludge

Cited by 108 publications

References 21 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

Comparative Analysis of the Energy Consumption of Different Wastewater Treatment Plants

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

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