Treatment of baseflow from an urban catchment by a floating wetland system

Chua, Leok Poh; Tan, Stephen Boon Kean; Sim, C. H.; Goyal, Manish Kumar

doi:10.1016/j.ecoleng.2012.08.031

Cited by 72 publications

(39 citation statements)

References 26 publications

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“…Therefore the process of organic substance decomposition presumably lasts more effective than any other plants. Some studies suggest that V. zizanioides is used for the processing of organic wastewater from tapioca factory (Indrayatie et al 2013), study using vetiver plantlets on floating platform with 1 3 2 Page 2 of 6 aeration to degrade phenol in illegally dumped industrial wastewater (Phenrat et al 2017), total organic pollution and tetracycline waste (Datta et al 2013), as well as organic waste with floating wetlands (Chua et al 2012). In addition, V. zizanioides and tilapia have an excellent performance when they are cultivated with aquaponics system (Effendi et al 2015a).…”

Section: Introductionmentioning

confidence: 99%

Tofu wastewater treatment using vetiver grass (Vetiveria zizanioides) and zeliac

2018

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Tofu production is a domestic industry, that most of it has no appropriate wastewater treatment facilities. Wastewater of tofu contains high organic matter which can decrease the water quality. This study aimed to analyze capability of Vetiveria zizanioides, L and zeliac in treating tofu wastewater industry. Zeliac is a new adsorbent, which consists of zeolite, activated carbon, limestone, rice husk ash and cement. Response surface methodology was applied to analyze the data, using central composite design with two factors, i.e., time (3, 9, and 15 days) and waste concentration (20, 40, and 60%). The optimum treatment occurred at the time of 15 days and 38.41% of tofu wastewater concentration decreasing up to 76% of COD, 71.78% of BOD, and 75.28% of TSS.

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Section: Introductionmentioning

confidence: 99%

Tofu wastewater treatment using vetiver grass (Vetiveria zizanioides) and zeliac

2018

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“…Mejoras en el flujo del agua, aireación de la columna de agua, recuperación de la ribera (arborización) y la implementación de humedales artificiales en las entradas puntuales (Scheffer et al, 1993;Jeppesen et al, 2007;Hilt et al,. 2009;Chua et al, 2012) constituyen otra serie de medidas que podrían contribuir a disminuir el actual estado eutrófico de los lagos de Concepción. Para la implementación de estos procedimientos y/o métodos se deben considerar las particularidades de cada lago urbano en cuanto a su profundidad, variabilidad estacional y estado trófico.…”

Section: Bases Para La Gestión De Los Lagos Urbanosunclassified

Bases limnologicas para la gestion de los lagos urbanos de Concepcion, Chile

Almanza-Marroquín

Figueroa

Parra

et al. 2016

lajar

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RESUMEN.Se estudiaron las características morfológicas y las variables físicas y químicas de cuatro lagos urbanos de Concepción (Chile) durante un periodo de tres años (2011)(2012)(2013). Los resultados muestran que los lagos se encuentran en un proceso de eutrofización avanzada, por la excesiva carga de nutrientes (principalmente fósforo y nitrógeno), además de presentar altas concentraciones de coliformes fecales y totales en la columna de agua y metales pesados en los sedimentos. El análisis de componentes principales, indica que el fósforo total, amonio, pH, transparencia conductividad y clorofila-a son las variables que mejor explican las condiciones del agua de todos los lagos estudiados. Se recomienda orientar las acciones de gestión de los lagos en disminuir la concentración de fósforo total, sin embargo y dependiendo de las particularidades de cada lago deben ser aplicadas otra serie de medidas complementarías que ayuden a revertir la situación actual de estos sistemas acuáticos. Este trabajo contribuye a la generación de conocimiento limnológico que facilita la toma de decisiones en materia del uso y gestión ambiental de los lagos urbanos de Concepción. Palabras clave: lagos urbanos, eutrofización, limnología, gestión ambiental, Concepción, Chile. Limnological bases for the management of urban lakes in Concepción, ChileABSTRACT. Morphological, physical and chemical characteristics of urban lakes of Conception were studied. The results indicate that these lakes are in an advanced process of eutrophication caused by excessive anthropogenic nutrient loads (mainly phosphorus and nitrogen). Furthermore, high concentrations of faecal and total coliforms in the water column and heavy metals in the sediments of these lakes were recorded. The principal component analyses showed that total phosphorus, ammonia, pH, conductivity, transparency and chlorophylla, are the variables that best explain the water conditions of all the lakes studied. It is recommended to orientate the lake management actions to decrease total phosphorus. Considering the particular situation of each lake, a series of complementary measures for reversing the current situation should be applied. This study provides new limnological information for the decision-making process focussed on the recovery of urban lakes of the City of Concepción.

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“…These are small-scale floated plants provided with structural supports made of inert materials without being grown in soils (Haddad and Mizyed 2011). These are applicable for surface waters with low flow velocities or shear stress and are promising solutions for humid and tropical climates (Chua et al 2012). It uses phytoremediation process that is a non-constructive solution increasing the remediation capability of rivers by photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of surface water quality using trading discharge permits and artificial aeration

et al. 2015

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Water quality trading (WQT) is a strategy for surface water quality management. This study focused on finding the optimal waste load allocation by WQT framework based on the concentrations of BOD and dissolved oxygen (DO) in Sefidrud River. It also assessed the consequences of using artificial aeration on trading discharge permits. For these purposes, river was simulated by Qual2kw. Two checkpoints were considered for monitoring the upstream (Sangar) and downstream (Caspian). Sensitivity analysis was carried out to find the impact factors of each emission sources. The required total maximum daily loads (TMDLs) were determined through simulation results. It predicted that the concentrations of ultimate BOD in both Sangar and Caspian stations may decrease from 3.6 and 8.1 mg/L, respectively, to 2.1 mg/L. Conversely, DO may increase from 5.8 and 0.9 mg/L to 7 and 3.7 mg/L, respectively. This could solely save 7 % of total treatment costs in comparison with the conventional command and control (C&C) policy. WQT may increase the revenues to 21 %. However, this could not provide enough flexibility and robustness in regard to the permit pricing and profits attained by stakeholders. Artificial aeration was considered as an improvement solution in the second scenario. The experimental results of hydroponic systems and hydraulic river simulation by CCHE2D showed that 0.25 day -1 can be added to the aeration coefficients. This modified TMDLs and impact factors thoroughly. Results verified that this approach may increase the revenues of TMDLs and discharge permit market, respectively, to 17 and 30 %. Permits can also be sold with higher prices and stakeholders may attain considerable profits. Consequently, the integration of artificial aeration with WQT was recommended for surface water quality enhancement.

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Treatment of baseflow from an urban catchment by a floating wetland system

Cited by 72 publications

References 26 publications

Tofu wastewater treatment using vetiver grass (Vetiveria zizanioides) and zeliac

Tofu wastewater treatment using vetiver grass (Vetiveria zizanioides) and zeliac

Bases limnologicas para la gestion de los lagos urbanos de Concepcion, Chile

Enhancement of surface water quality using trading discharge permits and artificial aeration

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