Dewatering of sewage sludge via thermal hydrolysis with ammonia-treated Fenton iron sludge as skeleton material

Xu, Zhixiang; Song, Hao; Deng, Xiaoqiang; Zhang, Yuyue; Ma, Xuli; Tong, Siqi; He, Zhixia; Wang, Qian; Shao, Yuewen; Hu, Xun

doi:10.1016/j.jhazmat.2019.120810

Cited by 69 publications

(20 citation statements)

References 54 publications

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“…Compared with other curves, SCOD at AD-Time 17 d showed the highest values after 15 days of thermophilic aerobic digestion because of the high number of microorganisms. According to previous studies, a large number of intercellular organic substances, including some thermostable enzymes, were released into the supernatant due to endogenous decay and enhanced cell wall dissolution, which led to a sharp increase in the concentration of SCOD [22]. With the start of aerobic digestion, aerobic bacteria rapidly proliferated and consumed the organic matter in the supernatant, resulting in a rapid reduction of the organic matter in the reactor, as suggested by the SCOD decline in the post digestion period.…”

Section: Variation Of Scod At Different Ad-timesmentioning

confidence: 99%

Effects of sludge properties in a combined process of mesophilic anaerobic digestion and thermophilic aerobic digestion

Zhao

Wang

et al. 2020

E3S Web Conf.

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The combination of mesophilic anaerobic digestion and thermophilic aerobic digestion (MAN-TAD) has been recognized as a suitable technology to deal with conventional activated sludge. The MAN-TAD system can make sludge achieve better stability. The retention time of anaerobic digestion (AD-time) had an important role in the sludge stabilization process. With the extension of anaerobic digestion retention time, MAN-TAD system can make sludge achieve better stability. In comparison, volatile/total solids ratio (VS/TS) at AD-time of 38 d presented the lowest values among the three different AD-time with the value of 0.32. Long retention time of anaerobic digestion resulted in high amounts of soluble organic compounds (SCOD), and extracellular polymers (EPS) in the supernatant. Such high amount of organic compounds caused deterioration in sludge dewaterability. Compared with sludges of AD-time 17 d and 24 d, sludge of AD-time 38 d became extremely difficult to dewater due to its high capillary water absorption time (CST) at the end of digestion.

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Section: Variation Of Scod At Different Ad-timesmentioning

confidence: 99%

Effects of sludge properties in a combined process of mesophilic anaerobic digestion and thermophilic aerobic digestion

Zhao

Wang

et al. 2020

E3S Web Conf.

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“…The team found a 0.8 ratio optimum with levels of H 2 O 2 (6,000 mg/L) and Fe +2 (5,000 mg/L) reduced the specific resistance to filtration (SRF) and capillary suction time (CST) by 88% and 76%, respectively, along with a 3.1% dry solid (Ferrentino, Merzari, & Andreottola, 2019). Xu et al (2019) also utilized the Fenton process in the development of an alkaline hydrothermal ferric carbon that was shown to improve dewaterability. Optimization of dewatering was also examined in relation to tannic acid and temperature with waste activated sludge by Ge, Yuan, Shen, Zhang, and Zhu (2019).…”

Section: Sludge To Biosolids: Treatment Advancesmentioning

confidence: 99%

Residuals, sludge, and biosolids: Advancements in the field

Brisolara

Gentile

Puszykowski

et al. 2020

Water Environment Research

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Advancements in the field of residuals, sludge, and biosolids have been made in 2019. This review outlines the major contributions of researchers that have been published in peer-reviewed journals and conference proceedings throughout 2019 and includes brief summaries from over 125 articles. The review is organized in sections including life cycle and risk assessments; characteristics, quality, and measurement including micropollutants, nanoparticles, pathogens, and metals; sludge treatment technologies including dewatering, digestion, composting, and wetlands; disposal and reuse including adsorbents, land application and agricultural uses, nutrient recovery, and innovative uses; odor and air emissions; and energy issues.

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“…A method of thermal hydrolysis with a new material‐alkaline hydrothermal ferric carbon (AHFC) as skeletons was presented to dewater the sewage sludge, which was made from Fenton iron sludge and NH 3 ·H 2 O by hydrothermal liquefaction (Xu et al., 2019). The dewaterability rate of thermally hydrolyzed sewage sludge increased with the increase of hydrolysis temperature because of the sludge solubilization.…”

Section: Wastewater and Sludge Treatmentmentioning

confidence: 99%