Development of vermicast from sludge and powdered oyster shell

Kwon, Yongmoon; Lee, C.W.; Yun, Jeonghee

doi:10.1016/j.jclepro.2008.11.014

Cited by 33 publications

(17 citation statements)

References 6 publications

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“…Legislation has been enacted to prohibit the dumping of organic wastes such as wastewater sludge into the ocean. 8 For example, the Ministry of Land, Transport and Maritime Affairs (MLTM) of the Republic of Korea has enforced strict ruling on sludge management by banning the dumping of livestock manure and sewage sludge as well as industrial wastewater and sludge since 2012 and 2014, respectively. 9 Hence, finding a way to dispose of the sludge that would not permanently damage the environment is always a challenge in achieving sustainable sludge management.…”

Section: Introductionmentioning

confidence: 99%

Sustainable approach to biotransform industrial sludge into organic fertilizer via vermicomposting: a mini‐review

Lee

Shak

et al. 2018

J of Chemical Tech & Biotech

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Currently, industrial sludge is generated in large amounts. Industrial sludge is a solid or semi‐solid material consisting of all compounds removed from wastewater, as well as any substances added to the biological and chemical operation units during the treatment process. The composition of sludge may vary considerably. Furthermore, distinctive treatment and disposal methods are necessary as sludge produced from different industries has different characteristics. Therefore, processing and disposing of industrial sludge is a challenging and complex environmental problem. Landfilling, incineration and agricultural land application are the three most commonly employed methods for the disposal of industrial sludge. Among the three methods, the agricultural land application is a convenient and economical disposal alternative for industrial sludge. However, industrial sludge could have high putrescible content and pathogenic hazards. One possible way to ensure that the industrial sludge could be reused on agricultural land is by conditioning and stabilizing the sludge using a pretreatment process. One of the pretreatment processes which could be employed in this context is vermicomposting. Vermicomposting is an alternative for biological stabilization of organic wastes, with the addition of earthworms. Through vermicomposting, industrial sludge could be transformed into matured organic fertilizer or vermicompost in a shorter period. Thus, this work reviewed the recent literature on utilizing the vermicomposting process to manage industrial sludge in order to assess the feasibility of this technology. The present review also provides a brief overview of the production and treatment methods of industrial sludge. © 2017 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Sustainable approach to biotransform industrial sludge into organic fertilizer via vermicomposting: a mini‐review

Lee

Shak

et al. 2018

J of Chemical Tech & Biotech

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“…, , (Seco et al, 2014;Oliveira et al, 2013), , (Kwon et al, 2009) . (Korea Health Statistics, 2014).…”

Section: 서 론mentioning

confidence: 99%

Properties of Calcium Lactate Prepared from Calcined Littleneck Clam Ruditapes philippinarum Shell Powder

Lee¹,

Yoon²,

Lee³

et al. 2016

Korean Journal of Fisheries and Aquatic Sciences

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Clamshells, which comprise more than 50% of a clam's weight, are a major byproduct of the clam industry and are mainly composed of insoluble calcium carbonate. This study investigates the use of clamshells as a natural calcium resource. Highly soluble powdered calcium lactate (LCCL) was prepared from the calcined powdered shells of littleneck clams (LCCP) using response surface methodology (RSM) to predict optimum conditions. These conditions, as derived from pH, solubility, and yield of 11 LCCLs manufactured according to the RSM model, were 1.80 M lactic acid and 1.13 M LCCP. The actual values of pH (6.98), solubility (93.99%), and yield (351.23%) under the optimized conditions were as predicted. The derived LCCL exhibited a strong buffering capacity in the range of pH 2.78-3.90 when combined with less than 2 mL of 1 N HCl. The ranges of calcium content and solubility of LCCL were 7.7-17.5 g/100 g and 96.6-98.9%, respectively. Fourier transform infrared spectroscopy (FT-IR) of the LCCL identified it as calcium lactate pentahydrate, and field emission scanning electron microscopy (FESEM) revealed an irregular and rod-like microstructure. These results confirm the potential use of clamshells, converted to highly soluble organic acid calcium, as an additive to enhance calcium content in food ingredients.

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“…Thus, organic amendments proved to be better than chemical fertilizers in energy plantation of Salix species (Hector et al, 2003). The nutrient value of sludge was also encompassed in an experiment conducted in Korea in which sewage sludge was used for development of vermicomposting cast which fulfilled the cast standards of Korea Ministry of Environment and improved the capacity of the soil to hold nutrients for plants, improved soil aeration and soil drainage (Kwon et al, 2008).…”

Section: Energy MIX In Households Of Urban India In 1999mentioning

confidence: 99%