Nutrient released characteristics of struvite-biochar fertilizer produced from concentrated sludge supernatant by fluidized bed reactor

Li, Yingxue; Xu, Defu; Lin, Haizhi; Wang, Wenhua; Yang, Hong

doi:10.1016/j.jenvman.2022.116548

Cited by 11 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Struvite is a mineral that commonly forms in the urinary tract and is a major component of certain types of kidney stones. Its chemical formula is (NH 4 )MgPO 4 •6H 2 O, and its crystal structure is a combination of magnesium, ammonium, and phosphate ions [53]. The struvite crystallized in the Mm2 orthorhombic pyramidal class.…”

Section: Struvitementioning

confidence: 99%

See 1 more Smart Citation

Kidney Stones: Crystal Characterization

González-Enguita,

García-Giménez

2024

Crystals

View full text Add to dashboard Cite

The variety of types that appear in kidney stones makes it necessary to describe them to try to understand their formation. The crystalline phases recognized in stones are classified according to their chemical composition. For this reason, a study using X-ray microdiffraction, Raman spectroscopy, SEM/EDX analysis, and cathodoluminescence (CL) is recommended, to identify their composition. In the present study, this was carried out on kidney stones collected from surgeries in hospitals from Spain. The samples were collected in two representative urban centers: one from a large city, Madrid; the other with a mostly rural population, in order to contrast the possible compositions of the kidney stones. In large cities, struvite appears more frequently, although calcium oxalates are very common in both areas. An attempt was made to provide a guide to the most frequent phases, accompanied by four analysis methods that make their identification possible.

show abstract

Section: Struvitementioning

confidence: 99%

“…CL bands are in Figure 6d). Struvite is a phosphate that generates great disposal problems in the fecal waters of large cities due to its expensive treatment and use as waste [53].…”

Section: Struvitementioning

confidence: 99%

Kidney Stones: Crystal Characterization

González-Enguita,

García-Giménez

2024

Crystals

View full text Add to dashboard Cite

show abstract

“…Researchers have tried to introduce carrier materials to prevent the nanocatalyst/Fe-Cu bimetallic oxide from coming together. For example, biochar (BC), with its low cost, large specific surface area, and rich surface functional groups [32], can increase the contact probability between organic pollutants and active free radicals by mesoporous structure and high surface areas, and adsorb organic matter in water [33]. Alkali lignin (AL) is a major by-product of the paper industry, which accounts for 85% of global lignin production [34].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Removal of Dissolved Effluent Organic Matter in Wastewater Using Lignin-Based Biochar Supported Fe–Cu Bimetallic Oxide Catalyst

Wang,

Kong,

et al. 2024

JMSE

Self Cite

View full text Add to dashboard Cite

The effluent discharged from wastewater treatment facilities frequently enters the ocean, posing a considerable threat to the health of marine life and humans. In this paper, an alkali lignin-based biochar-loaded modified Fe–Cu catalyst (FeCu@BC) was prepared to remove soluble microbial products (SMP) from secondary effluent as disinfection by-products precursors at ambient temperature and pressure. The humic acid (HA) was taken as the representative substance of SMP. The results showed that the maximum removal efficiency of HA reached 93.2% when the FeCu@BC dosage, pH, initial HA concentration, and dissolved oxygen concentration were 5.0 g/L, 7, 100 mg/L, and 1.75 mg/L, respectively. After three cycles, the removal efficiency of HA could be maintained at more than 70%. The quenching experiments and electron spin resonance (EPR) results showed that •OH and 1O2 were involved in the degradation of HA in the FeCu@BC catalyst reaction system, with 1O2 playing a dominant role. Theoretical calculations confirmed that •OH and 1O2 were more prone to attack the C=O bond of the side chain of HA. After processing by the FeCu@BC catalyst, the yield of chlorinated disinfection by-products from secondary effluent had decreased in an obvious manner. This study provides a new solution to efficiently solve the problem of chlorinated disinfection by-products from HA.

show abstract

“…With the addition of biochar to the bioreactor, the thickened sludge releases more PO 4 3− -P and NH 4 + -N, obtaining a continuous supply of nitrogen and phosphorus. This is a promising method for recycling nitrogen and phosphorus from thickened sludge [28].…”

Section: Introductionmentioning

confidence: 99%

Anaerobic Fluidized-Bed Membrane Bioreactor for Treatment of Liquid Fraction of Sludge Digestate: Performance and Agricultural Reuse Analysis

et al. 2023

View full text Add to dashboard Cite

The treatment of sludge digestion liquid is a big challenge in wastewater treatment. If treated as normal wastewater, large amounts of nitrogen and phosphorus present in the sludge digestion liquid might be wasted when they could be reused in agricultural irrigation and reduce the consumption of artificial fertilizers. Thus, it is of utmost importance to deliver a simple and feasible strategy to treat sludge digestion liquid for agricultural reuse. In this study, a novel type of anaerobic fluidized bed membrane bioreactor system (US-AnFMBR) was developed by combining an ultrasonic processing unit and biochar in AnFMBR. The improvement of sludge properties, removal of pollutants performance and membrane fouling mitigation were achieved in this novel system. The optimal dose of BC (biochar) was 2.5 g·L−1, and the optimal ultrasonic treatment conditions were 30 min at 26 W. The main contribution of ultrasound was to improve the activity of sludge microorganisms to adsorb and degrade more organic matter present in sewage. The system achieved the removal efficiencies of COD, NH4+-N and PO43−-P up to 89.41%, 49.29% and 54.83%, respectively, and had a better mitigation effect in terms of membrane fouling. On the one hand, the biochar addition for COD removal performance was mainly manifested in membrane rejection performance. On the other hand, the combination of low-cost biochar and AnFMBR can also provide new ideas for the recycling of agricultural waste for biochar production. However, regarding the removal efficiency of NH4+-N and PO43−-P, the US-AnFMBR system promoted the activity of starved sludge to preferentially absorb NH4+-N compared with PO43−-P by statistical analysis. The US-AnFMBR can reduce the viscosity of sludge and release more small molecular substances, thus better mitigating membrane fouling. Long-term operation performance also revealed the excellent stability of the sludge digestion liquid treatment. The US-AnFMBR system achieves the recovery of nitrogen and phosphorus resources for subsequent agricultural recycling, and avoids the eutrophication of water ecosystems. Reclaimed water meets the nutrient requirements of typical crops during the growing season. To a certain extent, carbon emission reductions in agriculture can be achieved.

show abstract

Nutrient released characteristics of struvite-biochar fertilizer produced from concentrated sludge supernatant by fluidized bed reactor

Cited by 11 publications

References 39 publications

Kidney Stones: Crystal Characterization

Kidney Stones: Crystal Characterization

Enhanced Removal of Dissolved Effluent Organic Matter in Wastewater Using Lignin-Based Biochar Supported Fe–Cu Bimetallic Oxide Catalyst

Anaerobic Fluidized-Bed Membrane Bioreactor for Treatment of Liquid Fraction of Sludge Digestate: Performance and Agricultural Reuse Analysis

Contact Info

Product

Resources

About