Conversion of Sewage Sludge to Biosolids

Amuda, Omotayo S.; Deng, An; Alade, Abass Olanrewaju; Hung, Yung‐Tse

doi:10.1007/978-1-59745-174-1_2

Cited by 14 publications

(14 citation statements)

References 10 publications

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“…Total carbon also increased from 0.5 to 3.1% whereas total nitrogen from 0.1% in T1 to 0.5% in T4. The significant difference among the treatment levels was due to high organic materials in the sludge (Amuda et al, 2008) but the differences depends on the age and the origin of the sewage sludge (Soler-Rovira et al, 1996) where in this experiment the differences of nitrogen and carbon were not very large.…”

Section: Statistical Analysis and Phytoremediation Potential Assessmentmentioning

confidence: 62%

ASSESSMENT OF <I>MELALEUCA CAJUPUTI</I> AS HEAVY METALS PHYTOREMEDIATOR FOR SEWAGE SLUDGE CONTAMINATED SOIL

Mohd¹

2013

American Journal of Applied Sciences

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In 2011, total marine capture landings in Peninsular Malaysia decreased by 3.9% which amounted to 1,373,105 tonnes as compared to 1,428,881 tonnes in 2010. The decline is connected to marine pollution which mainly comes from land based sources. Coastal forests play an important role affecting the marine ecosystem health and need to be conserved as a buffer to minimize pollution input into marine ecosystem. Heath forest, a type of coastal forest that receives less attention compared to mangroves, also has similar role. Melaleuca cajuputi that dominates heath forest has high potential as a phytoremediator of heavy metals and also has high economic values. A greenhouse experiment was conducted to evaluate the potential of this species to extract heavy metals namely Zn and Cd from soil. Four levels of treatment were prepared where the test media was mixed with different amounts of sewage sludge (v/v) namely; T1 (control-soil only), T2 (30% sludge +70% soil), T3 (50% sludge + 50% soil) and T4 (70% sludge + 30% soil). After 90 days of experimental period, the accumulation of Zn was found to be high in the roots (137.19 mg kg^-1), followed by the leaves (135.0 mg kg^-1) and stems (102.24 mg kg^-1). As for Cd the highest concentration was in the roots (2.05 mg kg^-1), stems (1.78 mg kg^-1) and leaves (1.66 mg kg^-1). The species Transfer Factor (TF) values in the greenhouse experiment were > 1 but the Bio-Concentration Factor (BCF) values areâ¤ 1. This result shows that M. cajuputi is tolerant to Zn and Cd toxicity (low BCF) but able to transfer these elements (high TF) to the shoots for removal by leaf fall or by harvesting the shoots. In addition, the accumulation of Zn and Cd were high in the roots which suggests that Zn and Cd were efficiently immobilized (in the roots) from entering the marine ecosystem

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Section: Statistical Analysis and Phytoremediation Potential Assessmentmentioning

confidence: 62%

ASSESSMENT OF <I>MELALEUCA CAJUPUTI</I> AS HEAVY METALS PHYTOREMEDIATOR FOR SEWAGE SLUDGE CONTAMINATED SOIL

Mohd¹

2013

American Journal of Applied Sciences

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“…The purpose of the primary treatment is mainly to reduce the amount of suspended solids present in the wastewater and the collection of grease and scum. Settling of the sewage is influenced by density, size, ability to flocculate, retention time and surface loading (Spellman 1997;Spinosa and Vesilind 2001;Amuda et al 2008;Clesceri et al 2008). During primary treatment, more than half of the suspended solids is removed and over one third of the biochemical oxygen demand is utilized (Amuda et al 2008).…”

Section: Primary Treatmentmentioning

confidence: 99%

“…The products of the primary treatment then move on to secondary treatment. Wastewater at this stage still has a high biological oxygen demand (BOD) thus requiring secondary treatment either through biological filtration or sludge activation (Amuda et al 2008). During its secondary treatment, growth of microbes is encouraged to consume most of the available nutrients (Spinosa and Vesilind 2001).…”

Section: Secondary Treatmentmentioning

confidence: 99%

“…Closed tanks are now used instead of open tanks and a more steady temperature is maintained when compared with conventional aerobic digestion. However, the major disadvantage of this newer technology lies in the high cost of supplying pure oxygen which is needed for efficient aerobic decomposition in the closed tanks (Tchobanoglous and Burton, 1995;Amuda et al 2008).…”

Section: -Aerobic Stabilizationmentioning

confidence: 99%

“…Acetogenesis follows resulting in the breakdown of the products of hydrolysis and fermentation into intermediate compounds such as acetate and formaldehyde. Finally, methanogenesis converts these compounds to methane and water (Amuda et al 2008;Clesceri et al 2008).…”

Section: -Anaerobic Digestionmentioning

confidence: 99%

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Phosphorus fractions in biosolids, biosolid-amended soils, runoffs and its impact on primary productivity in aquatic ecosystems

Hanief¹

2021

Preprint

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The impact of land application of biosolids on soil phosphorus (P) and subsequent transfer to aquatic ecosystems were assessed. Boxed reference soils were amended with two biosolids at a rate of 8 dry t/ha. Biosolids and soil samples taken over four months were sequentially fractionated to determine various inorganic and organic P pools. Also, within three weeks of biosolids application, four storm events were simulated and surface runoff and leachate from the soils were collected and analyzed for different P forms. The runoffs and equivalent inorganic nutrient were added to different mesocosms that mimicked stratified lakes. Samples from the mesocosms were periodically collected and analyzed for various physical, chemical and biological parameters. The results indicated that biosolids significantly affect different P pools in soils. Also, P loading from biosolids was expected to drive the mesocosms to hypereutrophication, yet the response was moderately eutrophic, followed by decline in chlorophyll a.

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Environmentally Friendly Wastewater Treatment Methods for the Textile Industry

Sachidhanandham¹,

Periyasamy²

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Conversion of Sewage Sludge to Biosolids

Cited by 14 publications

References 10 publications

ASSESSMENT OF <I>MELALEUCA CAJUPUTI</I> AS HEAVY METALS PHYTOREMEDIATOR FOR SEWAGE SLUDGE CONTAMINATED SOIL

ASSESSMENT OF <I>MELALEUCA CAJUPUTI</I> AS HEAVY METALS PHYTOREMEDIATOR FOR SEWAGE SLUDGE CONTAMINATED SOIL

Phosphorus fractions in biosolids, biosolid-amended soils, runoffs and its impact on primary productivity in aquatic ecosystems

Environmentally Friendly Wastewater Treatment Methods for the Textile Industry

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