Current state of sludge production, management, treatment and disposal in China

Yang, Guang; Zhang, Guangming; Wang, Hongchen

doi:10.1016/j.watres.2015.04.002

Cited by 886 publications

(257 citation statements)

References 40 publications

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“…Sewage sludge (SS) production had an average annual growth of 13% from 2007 to 2013, and 6.25 million tons dry solids were produced in 2013 in China, and almost 80% of it has not been properly stabilized (Yang et al, 2015). The treatment of sewage sludge has become a big challenge due to strict legal regulations, land shortages, rising costs, and public concern along with fast urbanization and economic development (Wei et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Optimization and microbial community analysis of anaerobic co-digestion of food waste and sewage sludge based on microwave pretreatment

Zhang

Tong

et al. 2016

Bioresource Technology

200

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Section: Introductionmentioning

confidence: 99%

Optimization and microbial community analysis of anaerobic co-digestion of food waste and sewage sludge based on microwave pretreatment

Zhang

Tong

et al. 2016

Bioresource Technology

200

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“…Therefore, in all countries of the European Union, there are directives for storage, stabilization and safe recycling. Before recycling, SS treatment usually involves disinfection, digestion, composting, and heat drying (Epstein 2003, Fytili and Zabaniotou 2008, Yang et al 2015, Cieślik et al 2015. During the disinfection process, the microflora of SS is changed.…”

Section: Introductionmentioning

confidence: 99%

Responses of Szarvasi-1 energy grass to sewage sludge treatments in hydroponics

Rév

Tóth

Solti

et al. 2017

Plant Physiology and Biochemistry

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Sewage sludge (SS) originating from communal wastewater is a hazardous material but have a potentially great nutritive value. Its disposal after treatment in agricultural lands can be a very economical and safe way of utilization once fast growing, high biomass, perennial plants of renewable energy production are cultivated. Szarvasi-1 energy grass (Elymus elongatus subsp. ponticus cv. Szarvasi-1), a good candidate for this application, was grown in hydroponics in order to assess its metal accumulation and tolerance under increasing SS amendments. The applied SS had a composition characteristic to SS from communal wastes and did not contain any toxic heavy metal contamination from industrial sludge in high concentration. Toxic effects was assessed in quarter strength Hoagland nutrient solution and only the two highest doses (12.5-18.75 g dm -3 ) caused decreases in root growth, shoot water content and length and stomatal conductance whereas shoot growth, root water content, chlorophyll concentration and the maximal quantum efficiency of photosystem II was unaffected. Shoot K, Ca, Mg, Mn, Zn and Cu content decreased but Na and Ni increased in the shoot compared to the unamended control. The nutritive effect was tested in 1/40 strength Hoagland solution and only the highest dose (12.5 g dm -3 ) decreased root growth and stomatal conductance significantly while lower doses (1.25-6.25 g dm -3 ) had a stimulative effect. Shoot K, Na, Fe and Ni increased and Ca, Mg, Mn, Zn and Cu decreased in this treatment. It was concluded that SS with low heavy metal content can be a potentially good fertilizer for high biomass non-food crops such as Szarvasi-1 energy grass.

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“…In China, approximately 6.25 million dry tons of sewage sludge were produced in 2013 (Yang et al, 2015). In the U.S., the amount of biosolids annually generated from stabilized sewage sludge is greater than 8 million dry tons (Peccia and Westerhoff, 2015).…”

Section: Introductionmentioning

confidence: 99%

Rheological properties of sewage sludge during enhanced anaerobic digestion with microwave-H2O2 pretreatment

et al. 2016

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a b s t r a c tThe rheological behavior of sludge is of serious concern in anaerobic digestion. This study investigated the rheological properties of sewage sludge during enhanced anaerobic digestion with microwave-H 2 O 2 pretreatment (MW-H 2 O 2 ). The results showed that MW-H 2 O 2 pretreatment resulted in the improvement of sludge flowability and weakening of its viscoelastic properties. Further positive effects on the rheological properties of digested sludge during anaerobic digestion were observed. The flowability was improved with a low level of apparent viscosity. The decrease of the consistency index and increase of the flow behavior index indicated that the strength of the inner structures and non-Newtonian flow characteristics of digested sludge weakened. Both the storage modulus (G 0 ) and loss modulus (G 00 ) decreased, indicating that the viscoelastic behavior became weak. These effects were possibly attributed to the changes of the digested sludge micro-structures, such as extracellular polymeric substances (EPS). This study concluded that anaerobic digestion for treating sewage sludge combined with pretreatment is a more favorable option than single anaerobic digestion from the perspective of rheology.

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Current state of sludge production, management, treatment and disposal in China

Cited by 886 publications

References 40 publications

Optimization and microbial community analysis of anaerobic co-digestion of food waste and sewage sludge based on microwave pretreatment

Optimization and microbial community analysis of anaerobic co-digestion of food waste and sewage sludge based on microwave pretreatment

Responses of Szarvasi-1 energy grass to sewage sludge treatments in hydroponics

Rheological properties of sewage sludge during enhanced anaerobic digestion with microwave-H2O2 pretreatment

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