Bioenergy, ammonia and humic substances recovery from municipal solid waste leachate: A review and process integration

Gu, Nannan; Liu, Jianyong; Ye, Jiongjiong; Chang, Nai Wen; Li, Yu You

doi:10.1016/j.biortech.2019.122159

Cited by 58 publications

(11 citation statements)

References 111 publications

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“…The positive effects of humic substances on plant growth may be related to indirect effects, such as increased efficiency in fertilization and reduced soil compaction, or to direct effects, such as improvements in plant biomass [38,39]. Such substances induce growth and increase the absorption of nitrogen, phosphorus and potassium [40].…”

Section: Ecological Effectmentioning

confidence: 99%

Chemical Characteristics of Humic Substances in Nature

Mahler¹,

Svierzoski²,

Bernardino³

2021

Humic Substance [Working Title]

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Humic substances are the main constituents of natural organic matter, found in both aquatic and terrestrial environments. Humic substances are a complex, dispersed, and heterogeneous mixture of various organic compounds synthesized from organic matter residues, decomposed by microorganisms. Most scientists indicate that humic substances are as a supramolecular association of small heterogeneous molecules stabilized by weak intermolecular bonds. When these substances are presented in water intended for drinking or industrial use, it can have a significant impact on the treatability of this water and on the success of chemical disinfection processes, due to possible formation of organic compounds harmful to human health. Moreover, the humic substances can be used of several ways such as fertilizer to help in the development of plants, to improve soil erosion and to removal of organic compounds and metals from soils and waters. In addition, humic substances suggest an important role in mitigating areas degraded by the phytoremediation technique. The purpose of chapter is to provide an overview of humic substances and to discuss their concepts, chemical characteristics, ecological effects and technological applications for soils and aquatic systems.

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Section: Ecological Effectmentioning

confidence: 99%

Chemical Characteristics of Humic Substances in Nature

Mahler¹,

Svierzoski²,

Bernardino³

2021

Humic Substance [Working Title]

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“…2 also shows that UF+NF permeate achieved a removal average greater than 97% of humic substances for both studied land lls, which evidences in this study the e ciency of removing recalcitrant organic matter using membrane fractionation. In addition, the ltration with membranes shows high e ciencies in removing the humic substances from leachate (Gu et al, 2019).…”

Section: Ultra Ltration and Nano Ltrationmentioning

confidence: 99%

Comparison between Aliivibrio fischeri and activated sludge microorganisms in the evaluation of the toxic pollutants of leachates from Brazilian landfills

Costa

Valentim

Silva

et al. 2021

Environ Sci Pollut Res

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Ecotoxicological assessment of land ll leachate has become a priority to determine its impacts on the ecosystem. Toxicity assays with microorganisms stand out due to their quick response, low cost and ease of testing. In this context, the present study evaluated the acute toxic effects of leachates from two land lls of different ages and modes of operation to bacterium A. scheri and activated sludge microorganisms and the ammonia nitrogen and humic substances (HS) sensitivity to these organisms. Reductions greater than 30% in leachate toxicity were observed after ammonia removal for A. scheri and activated sludge microorganisms. After 97% removal of HS, the greater reductions in toxicity (44.28 to 79.82%) were veri ed for microbial species studied, indicating that the organic compounds (measured as chemical oxygen demand, total organic carbon and humic substances) were the primary pollutants responsible for the toxicity of the leachates. Concerning the organisms studied, A. scheri showed greater sensitivity to the leachates' pollutants compared to the activated sludge microorganisms. Nevertheless, a strong correlation was observed between A. scheri and activated sludge microorganisms' toxicity responses, suggesting that respirometry assay can be used to determine leachate toxicity.

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“…Several studies have found the negative effects of waste leachate on soil quality due to the presence of high content of nutrients, heavy metals, and soluble salts in the leachate 3 , 4 . For example, a range of approximately 1000–3000 mg L −1 for ammoniacal nitrogen was reported in leachates from different parts of the world 5 and ranges of 0.1–40 mg kg −1 , 20–1500 mg kg −1 , and 15–1300 mg kg −1 were found for Cd, Cr, and Ni of leachates of the US, respectively 6 . The upper range of these concentrations is far beyond their acceptable ranges.…”

Section: Introductionmentioning

confidence: 99%

Degradation of soil quality by the waste leachate in a Mediterranean semi-arid ecosystem

Yeilagi

Rezapour

Asadzadeh

2021

Sci Rep

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The assessment of soil quality indices in waste leachate-affected soils is vital to understand the threats of land quality degradation and how to control it. In this respect, a study was conducted on the effects of uncontrolled landfill leachate on soil quality index (SQI) in calcareous agricultural lands using 28 soil variables. Using the total data set (TDS) and minimum data set (MDS) approaches, the SQI was compared between leachate-affected soils (LAS) and control soils by the integrated quality index (IQI) and nemoro quality index (NQI) methods. The results revealed that LAS were significantly enriched by soil salinity-sodicity indices including electrical conductivity (EC), sodium adsorption ratio (SAR), and exchangeable sodium percentage (ESP), fertility indices including total N, available P and K, organic carbon, and cation exchange capacity (CEC), exchangeable cations (Ca, Mg, K, and Na), the available and total fractions of heavy metals (Zn, Cu, Cd, Pb, Ni). After the leachate got its way into the soil, the values of IQI and NQI were dropped ranging 5–16% and 6.5–13% for the TDS approach and 5–15.2% and 7.5–12.2 for the MDS approach, respectively. Clearly, the data showed that soil quality degradation was encouraged and stimulated by the leachate. Among the different models of SQI applied in the present study, IQI determined by MDS was the optimal model to estimate soil quality and predict crop yields given the analysis of the correlations among the SQI models, the correlations between the SQI models and wheat yield, and sensitivity index values.

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Bioenergy, ammonia and humic substances recovery from municipal solid waste leachate: A review and process integration

Cited by 58 publications

References 111 publications

Chemical Characteristics of Humic Substances in Nature

Chemical Characteristics of Humic Substances in Nature

Comparison between Aliivibrio fischeri and activated sludge microorganisms in the evaluation of the toxic pollutants of leachates from Brazilian landfills

Degradation of soil quality by the waste leachate in a Mediterranean semi-arid ecosystem

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