Treatment of landfill leachate in sequencing batch reactor supplemented with activated rice husk as adsorbent

Lim, Poh‐Eng; Lim, Suat-Ping; Seng, Chye‐Eng; Noor, Ahmad Md.

doi:10.1016/j.cej.2010.02.064

Cited by 31 publications

(9 citation statements)

References 24 publications

(24 reference statements)

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“…Consequently, the deterioration of the sludge settling ability and compressibility (increasing SVI values) resulted in decreasing MLSS concentration. Previous study has shown that high SVI values (bulking sludge) and low biomass concentrations were indications of inhibitory effects of some hazardous substances on microorganisms [38].…”

Section: Svimentioning

confidence: 99%

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Landfill leachate treatment using powdered activated carbon augmented sequencing batch reactor (SBR) process: Optimization by response surface methodology

Aziz

Yusoff

et al. 2011

Journal of Hazardous Materials

167

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Section: Svimentioning

confidence: 99%

“…Typically, SBR is divided into five stages: fill, react, settle, draw, and idle [27,28]. SBR has been used for the treatment of domestic, municipal, industrial, dairy, synthetic, toxic and slaughterhouse wastewaters, swine manure, and landfill leachates [7,24,[27][28][29][30][31][32][33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Landfill leachate treatment using powdered activated carbon augmented sequencing batch reactor (SBR) process: Optimization by response surface methodology

Aziz

Yusoff

et al. 2011

Journal of Hazardous Materials

167

View full text Add to dashboard Cite

“…Although this process is very effective for complete mineralization of pollutants, if it is applied as the only treatment process, it will be expensive. However, if the ultrasonic process is used as a pretreatment with other methods such as biological processes, its use can be optimized and be more useful for leachate treatment (Ben Yahmed et al, 2009;Lim et al, 2010). The objective of this study was to investigate the effect of the ultrasonic process as a pre-treatment for leachate biodegradability improvement.…”

Section: A C T E D a R T I C L Ementioning

confidence: 99%

[RETRACTED ARTICLE]Use of a sonocatalytic process to improve the biodegradability of landfill leachate

Roodbari¹,

Nabizadeh²,

Mahvi³

et al. 2012

Braz. J. Chem. Eng.

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-Landfill leachate is one of the most important sources of toxic organic compounds for ground and surface waters. Advanced oxidation processes can offer an effective and environmentally friendly method for pretreatment of landfill leachates. In this study, an ultrasonic process was used for the pre-treatment of landfill leachate with the objective of improving its overall biodegradability, evaluated in terms of the BOD 5 /COD ratio, up to a value compatible with biological treatment. Under optimized experimental conditions (pH of 10, power of 110 watts, frequency of 60 kHz, TiO 2 concentration of 5 mg/L and exposure time of 120 min), this method showed suitability for partial removal of chemical oxygen demand (COD). The biodegradability was significantly improved (BOD 5 /COD increased from 0.210 to 0.786) which allowed an almost total removal of COD by a sequential activated sludge process.

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“…As shown in Fig. 5, the SVI in the SBR system increased while the biomass decreased during the operation, which suggests a tendency to decay and disintegrate because of the toxicity of compounds and insufficient biodegradable substrate [20,21]. Moreover, deterioration of the sludge settling capability and compressibility decreased MLBSS concentration [22].…”

Section: Effects Of Pac Addition On Activated Sludge Characteristicsmentioning

confidence: 90%

Optimization and effect of powdered activated carbon addition on commingled chemical industrial wastewater treatment in a sequencing batch reactor

Wang

et al. 2014

Desalination and Water Treatment

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In this study, commingled chemical industrial wastewater was treated using a sequencing batch reactor with powdered activated carbon (PAC-SBR). The performance of the PAC-SBR system was investigated under various dosages and feeding frequencies. Results showed that a PAC dosage of 2 g PAC/L-reactor and a feeding frequency of 0.25 g PAC/Lreactor to 0.5 g PAC/L-reactor per 3.5-7 d maintained a stable long-term performance during operation. The effects of PAC addition were also considered. Removal of organic matter in the PAC-SBR system demonstrated synergistic effects of biodegradation and PAC adsorption. The system with PAC had better sludge volume index values (100-200) than that without PAC (150-250). This result suggested that the sludge settling characteristic was improved. Hence, PAC addition was proven to increase biomass in the PAC-SBR system, which improved the removal of chemical oxygen demand through biodegradation. Furthermore, the excitation-emission matrix spectrum of organic matter showed that compounds in raw wastewater that contains aromatic rings, heterocyclic ring structures, and bicyclic aromatic structures were partially removed by biodegradation and PAC adsorption. The organic acid-like compounds, which were recalcitrant to biodegradation, were adsorbed via PAC. The results of organic matter fractionation showed that compounds in transphilic neutral and hydrophilic fractions were easily transformed through biodegradation, whereas compounds in hydrophobic fractions were adsorbed by PAC.

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Treatment of landfill leachate in sequencing batch reactor supplemented with activated rice husk as adsorbent

Cited by 31 publications

References 24 publications

Landfill leachate treatment using powdered activated carbon augmented sequencing batch reactor (SBR) process: Optimization by response surface methodology

Landfill leachate treatment using powdered activated carbon augmented sequencing batch reactor (SBR) process: Optimization by response surface methodology

[RETRACTED ARTICLE]Use of a sonocatalytic process to improve the biodegradability of landfill leachate

Optimization and effect of powdered activated carbon addition on commingled chemical industrial wastewater treatment in a sequencing batch reactor

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