Improving stormwater quality at source using catch basin inserts

Alam, Zahanggir; Anwar, Faisal; Heitz, Anna; Sarker, Dipok Chandra

doi:10.1016/j.jenvman.2018.08.070

Cited by 29 publications

(17 citation statements)

References 44 publications

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“…The Freundlich constant (K F ) in equation ( 10) indicates the approximate adsorption capacity. The maximum value of K F was found for PO 4 -P adsorption which also supports the findings of maximum Langmuir adsorption capacity (q m ). The factor 1/n indicates the strength of adsorption in the adsorption process (1/n = 1 indicates that adsorption partitioning are independent of concentration, 1/n < 1 indicates normal adsorption and 1/n > 1 indicates cooperative adsorption) [50].…”

Section: Intraparticle Diffusion Liquid Film Diffusionsupporting

confidence: 85%

“…Batch adsorption experiments were conducted with EW biochar, alum sludge of 2.36 mm and their mixture with varying initial nutrient concentrations (0.5-5 mg/L), adsorbent dosages (2-10 g) and pH (4)(5)(6)(7)(8). Each adsorbent dosage was mixed with nutrient solution (0.5-5 mg/L; 100 mL) in a 250 mL Erlenmeyer flask.…”

Section: Batch Experimentsmentioning

confidence: 99%

“…Each adsorbent dosage was mixed with nutrient solution (0.5-5 mg/L; 100 mL) in a 250 mL Erlenmeyer flask. The pH values were kept constant at 6.5 (± 0.5) except the experiments with varying pH (4)(5)(6)(7)(8). Parafilm was used to cover the flasks to avoid any evaporation of the solution.…”

Section: Batch Experimentsmentioning

confidence: 99%

“…Due to the expansion of urbanization, the volume of urban stormwater runoff has also been increased significantly [1][2][3][4]. This urban runoff consists of significant number of pollutants including nutrients, heavy metals, oil, grease and hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nutrients Adsorption onto Biochar and Alum Sludge for Treating Stormwater

Alam

Anwar

2020

J. of Wat. & Envir. Tech.

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In this study, Eucalyptus wandoo (EW) biochar and alum sludge and their mixture are used in batches to remove nutrients (ammonium-nitrogen (NH 3 -N), nitrate-nitrogen (NO 3 -N), nitrite-nitrogen (NO 2 -N), and phosphate-phosphorus (PO 4 -P)) from synthetic stormwater. First, batch tests were conducted using biochar and alum sludge separately with varying concentration (0.5-5 mg/L); dosage (2-10 g); pH (4-9); and contact time (0-24 h). The results revealed that the EW biochar alone could remove 100% of NO 2 -N and NH 3 -N while the alum sludge alone could remove 100% of PO 4 -P. Next batch tests were carried out with the mixture of EW biochar and alum sludge of different proportions and the results revealed that the mixture of 8 g biochar and 2 g alum sludge gave the best combination for removing all nutrients (NH 3 -N = 98.2%; NO 2 -N = 99.4%; PO 4 -P = 99.8%) except NO 3 -N. The adsorption kinetics of mix-medium were studied for Intraparticle diffusion, liquid film diffusion and Lagergren pseudo first and second-order models. The nutrient adsorptions onto mix-medium show two-stage adsorption process following Intraparticle diffusion and liquid film diffusion. The results revealed that the pseudo-second order kinetic models fitted better with high R 2 (0.98-1.00) and small normalized standard deviation, Δq (0.00-0.62). The isotherm results revealed that the NH 3 -N adsorption followed both Langmuir and Freundlich model while NO 2 -N and PO 4 -P adsorption followed Langmuir model better.

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Section: Intraparticle Diffusion Liquid Film Diffusionsupporting

confidence: 85%

Section: Batch Experimentsmentioning

confidence: 99%

Section: Batch Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nutrients Adsorption onto Biochar and Alum Sludge for Treating Stormwater

Alam

Anwar

2020

J. of Wat. & Envir. Tech.

Self Cite

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“…Therefore, when the surface runoff entered WWTP, the concentrations of COD, TSS, and ISS first reflected the scouring effect of initial rainwater and then reflected the dilution effect of surface runoff [23]. The effects on TN and TP were primarily dilution [24]. After the rainfall started, the average volume diameter of the influent from the grit chamber increased from 54.4 μm–71.9 μm, with the maximum value appearing at 80 min.…”

Section: Discussionmentioning

confidence: 99%

The Shock Effect of Inorganic Suspended Solids in Surface Runoff on Wastewater Treatment Plant Performance

Tan²,

Zhi-xi

et al. 2019

IJERPH

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Previous studies on the water quality of surface runoff often focused on the chemical oxygen demand (COD), nitrogen, phosphorus, and total suspended solid (TSS), but little is known in terms of the inorganic suspended solids (ISS). This research investigated the effects of ISS carried by surface runoff on the treatment efficiency of the pretreatment facilities and the ratio of mixed liquor volatile suspended solid to mixed liquor suspended solid (MLVSS/MLSS) of the activated sludge in a wastewater treatment plant (WWTP) with the anaerobic-anoxic-oxic (AAO) process in Chongqing city, China. The results showed that the surface runoff had a long-lasting impact on the grit removal capacity of the grit chamber, affecting the normal operation after the rainfall. In contrast, the primary sedimentation tank showed strong impact resistance with higher removal rates of COD, TSS, and ISS. Nonetheless, the primary settling tank aggravates the removal of organic carbon in sewage during rainfall, having a negative impact on subsequent biological treatment. The ISS in the surface runoff could increase the sludge concentration and decrease the MLVSS/MLSS ratio. After repeated surface runoff impact, the MLVSS/MLSS ratio in the activated sludge would drop below even 0.3, interrupting the normal operation of WWTP.

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Embedding Nano-adsorbents Within Gross Pollutant Traps (GPTs): A Review

Safie

Rajin

Anisuzzaman

et al. 2020

Advances in Nanotechnology and Its Applications

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Gross pollutants (GPs) in storm water runoff have increased the number of harmful contaminants as a result of complete and incomplete decomposition of organic and non-organic matters. The addition of adsorbents may enhance the performance of GPTs as an on-site treatment. However, there is no complete review reporting the performance of GPTs with adsorbents. Hence, this review presents the preliminary process of GPTs installation, performance of GPTs in dissolved pollutants removal as well as the potential of zeolite and chitosan as adsorbent media within GPTs.

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Improving stormwater quality at source using catch basin inserts

Cited by 29 publications

References 44 publications

Nutrients Adsorption onto Biochar and Alum Sludge for Treating Stormwater

Nutrients Adsorption onto Biochar and Alum Sludge for Treating Stormwater

The Shock Effect of Inorganic Suspended Solids in Surface Runoff on Wastewater Treatment Plant Performance

Embedding Nano-adsorbents Within Gross Pollutant Traps (GPTs): A Review

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