Phosphorus removal from secondary sewage and septage using sand media amended with biochar in constructed wetland mesocosms

Rozari, Philiphi de; Greenway, Margaret; Hanandeh, Ali El

doi:10.1016/j.scitotenv.2016.06.096

Cited by 84 publications

(41 citation statements)

References 38 publications

(53 reference statements)

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“…Tan et al (2015) pointed out that adsorption mechanisms of biochar can occur via different types of interactions such as electrostatic attraction, ion-exchange, physical adsorption and chemical bonding. In our research, increase of biochar percentage in the sand media increased the cation exchange capacity (CEC) from 5.73 (S100) to 9.23 cmol(+)/ kg (BC20) (De Rozari et al, 2016). The CEC in the biochar is the main source of NH 4 + adsorption (Jassal et al, 2015).…”

Section: Intermittent Septage Load Phase (November 2014-july 2015)mentioning

confidence: 71%

“…The treatments contained 12% coir peat to enhance moisture retention (during intermittent loading) except in a control treatment that used 100% sand with no added coir peat, labelled as S100. The physical and chemical characteristics of the seven media treatments were presented in a previous paper (De Rozari et al, 2016). All treatments were triplicated.…”

Section: Experimental Designmentioning

confidence: 99%

“…The removal of TSS, BOD 5 , and coliforms has previously been reported in De Rozari et al (2015). Phosphorus removal, microbial P biomass and plant-P biomass has been reported in De Rozari et al (2016). This paper focuses on N removal and plant-N biomass.…”

Section: Experimental Designmentioning

confidence: 99%

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Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

Rozari

Greenway

Hanandeh

2018

Ecological Engineering

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Biochar has been identified as a media amendment to improve nutrient removal from wastewater, and N retention and plant growth in agroforestry. It therefore has the potential for treating domestic wastewater. The aim of this research was to compare nitrogen removal and plant growth in pure sand and sand amended with biochar, in wetland mesocosms (240 L) receiving sewage. There were seven media treatments based on the proportions of biochar in the sand media (100% sand, sand and coir peat, 5, 10, 15, 20, 25% biochar). The plant species were Paperback tree (Melaleuca quinquenervia) and Lemongrass (Cymbopogon citratus). The mesocosms were continuously loaded for 8 months with secondary clarified wastewater (SCW) (16 L/day). Septage was then intermittently loaded (20 L/2 days) for a further 8 months. Inflow and outflow samples were monitored for TN, NH 4-N, and NO x-N. All treatments showed good nitrogen removal efficiency. Average removal efficiencies of TN, NO x-N and NH 4-N in the mesocosms loaded with SCW ranged from 71 to 87%, 81 to 93% and 65 to 79%, for 100% Sand to 25% Biochar respectively. For septage, the removal efficiencies ranged from 63 to 81%, 69 to 87% and 66 to 81%, for 100% Sand to 25% Biochar respectively. Significant differences of nitrogen outflow concentrations were observed between pure sand and sand amended with biochar. Physical chemical properties of the biochar would have facilitated microbial processes and adsorption. Strong positive correlations were observed between biochar content in the media and nitrogen removal rates. The increased nitrogen removal may be attributed to higher mineralisation of organic nitrogen and NH 4-N, especially in the case of septage where strong correlation was observed between BOD 5 and TN removal. Total N biomass in the plants harvested after 21 months ranged from 13.4-14.0 g N. The addition of biochar did not increase plant N biomass in either species.

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Section: Intermittent Septage Load Phase (November 2014-july 2015)mentioning

confidence: 71%

Section: Experimental Designmentioning

confidence: 99%

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Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

Rozari

Greenway

Hanandeh

2018

Ecological Engineering

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“…The removal efficiency of phosphate in sand was extremely high (>99%); as a result, the effect of biochar addition on the removal efficiency (in relative terms) was insignificant. A number of researchers reported that biochar had little capacity for PO4 3-removal [6,12]. On the other hand, others reported that biochar has the capacity to remove or enhance phosphorus removal [4,5,7,13].…”

Section: Ammonium Removalmentioning

confidence: 99%

Removal of nitrate, ammonia and phosphate from aqueous solutions in packed bed filter using biochar augmented sand media

2017

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Abstract.Nutrients from wastewater are a major source of pollution because they can cause significant impact on the ecosystem. Accordingly, it is important that the nutrient concentrations are kept to admissible levels to the receiving environment. Often regulatory limits are set on the maximum allowable concentrations in the effluent. Therefore, wastewater must be treated to meet safe levels of discharge. In this study, laboratory investigation of the efficiency of packed bed filters to remove nitrate, ammonium and phosphate from aqueous solutions were conducted. Sand and sand augmented with hydrochloric acid treated biochar (SBC) were used as packing media. Synthetic wastewater solution was prepared with PO4 3-, NO3 -, NH4 + concentrations 20, 10, 50 mg/L, respectively. Each experiment ran for a period of five days; samples from the effluent were collected on alternate days. All experiments were duplicated. Over the experiment period, the average removal efficiency of PO4 3-, NO3 -, NH4 + were 99.2%, 72.9%, 96.7% in the sand packed columns and 99.2%, 82.3%, 97.4% in the SBC packed columns, respectively. Although, the presence of biochar in the packing media had little effect on phosphate and ammonium removal, it significantly improved nitrate removal.

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“…However, excessive P loads to water bodies from industrial, agricultural, household wastes may cause the overgrowth of aquatic plants or algae which accelerate the depletion of dissolved oxygen (DO) in waters, and leading to serious eutrophication problems. In developing countries, approximately 75% of domestic wastewater is released to the environment without treatment [1]. Ayaz et al, [2] reported that eutrophication in receiving water bodies may occur when concentration of phosphorus was 6 mg/L.…”

Section: Introductionmentioning

confidence: 99%

Recycled Concrete Aggregates as a Filter for Removal of Phosphorus in Synthetic Wastewater

Roni¹,

Adnan²,

Hamdan³

2018

IJET

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This paper assesses of recycled concrete aggregates as a filter for removal of phosphorus in synthetic wastewater. Recycled concrete aggregate used as a filter system emerged as an alternative technology for phosphorus removal. This can overcome the problem of construction site waste by converting the waste into something valuable products. Thus, this study aim to determine the percentage of Phosphorus removal by using two different size of Recycled Concrete Aggregate which is (5 mm to 10 mm) and (25 mm to 30 mm). A total of five vertical recycled concrete aggregate filter laboratory scale was design using recycled concrete aggregate and five different concentration of synthetic wastewater which is 10 – 50 mg/L was prepared. Samples were taken from the influent and effluent filters to be tested once a week, and analyzed to determine the value of pH and the percentage of Phosphorus removal (%). RCA was analyzed using Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDX) testing to determine chemical composition. Results shows that RCA is highly contained with Aluminium, Calcium and Magnesium elements that enhanced the phosphorus adsorption. The RCA with size 5 mm to 10 mm and synthetic wastewater 10 mg/L display high potential in removing Phosphorus with 99.54% removal at pH 9.77. The lower concentration of synthetic wastewater, smaller size of RCA and higher pH have slightly better Phosphorus removal efficiency. Thus, RCA has a potential in removing Phosphorus from synthetic wastewater.

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Phosphorus removal from secondary sewage and septage using sand media amended with biochar in constructed wetland mesocosms

Cited by 84 publications

References 38 publications

Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

Removal of nitrate, ammonia and phosphate from aqueous solutions in packed bed filter using biochar augmented sand media

Recycled Concrete Aggregates as a Filter for Removal of Phosphorus in Synthetic Wastewater

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