Application of biochar as an innovative substrate in constructed wetlands/biofilters for wastewater treatment: Performance and ecological benefits

Deng, Shengjiong; Chen, Jinquan; Chang, Junjun

doi:10.1016/j.jclepro.2021.126156

Cited by 142 publications

(36 citation statements)

References 67 publications

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“…The PW was analyzed by pH [48], electrical conductivity (EC) [49], chloride (Cl − ) [50], heavy metals [51], COD [52], and PAHs via standard methods [53]. The concentrations of different pollutants, such as heavy metals and PAHs, in PW are shown in Figure 1.…”

Section: Produced Water Characterization and Gc-ms Analysis For Pahs Concentrationmentioning

confidence: 99%

Optimization of Micro-Pollutants’ Removal from Wastewater Using Agricultural Waste-Derived Sustainable Adsorbent

Alhothali

Haneef

Mustafa

et al. 2021

IJERPH

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Water pollution due to the discharge of untreated industrial effluents is a serious environmental and public health issue. The presence of organic pollutants such as polycyclic aromatic hydrocarbons (PAHs) causes worldwide concern because of their mutagenic and carcinogenic effects on aquatic life, human beings, and the environment. PAHs are pervasive atmospheric compounds that cause nervous system damage, mental retardation, cancer, and renal kidney diseases. This research presents the first usage of palm kernel shell biochar (PKSB) (obtained from agricultural waste) for PAH removal from industrial wastewater (oil and gas wastewater/produced water). A batch scale study was conducted for the remediation of PAHs and chemical oxygen demand (COD) from produced water. The influence of operating parameters such as biochar dosage, pH, and contact time was optimized and validated using a response surface methodology (RSM). Under optimized conditions, i.e., biochar dosage 2.99 g L−1, pH 4.0, and contact time 208.89 min, 93.16% of PAHs and 97.84% of COD were predicted. However, under optimized conditions of independent variables, 95.34% of PAH and 98.21% of COD removal was obtained in the laboratory. The experimental data were fitted to the empirical second-order model of a suitable degree for the maximum removal of PAHs and COD by the biochar. ANOVA analysis showed a high coefficient of determination value (R2 = 0.97) and a reasonable second-order regression prediction. Additionally, the study also showed a comparative analysis of PKSB with previously used agricultural waste biochar for PAH and COD removal. The PKSB showed significantly higher removal efficiency than other types of biochar. The study also provides analysis on the reusability of PKSB for up to four cycles using two different methods. The methods reflected a significantly good performance for PAH and COD removal for up to two cycles. Hence, the study demonstrated a successful application of PKSB as a potential sustainable adsorbent for the removal of micro-pollutants from produced water.

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Section: Produced Water Characterization and Gc-ms Analysis For Pahs Concentrationmentioning

confidence: 99%

Optimization of Micro-Pollutants’ Removal from Wastewater Using Agricultural Waste-Derived Sustainable Adsorbent

Alhothali

Haneef

Mustafa

et al. 2021

IJERPH

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“…Eutrophication in micro-polluted lake ecosystems has an increasing trend worldwide due to unreasonable anthropogenic activities [1]. Constructed wetlands (CWs) are an efficient, economical, and eco-friendly sewage purification technology, especially suitable for the treatment of micro-polluted lake and river water [2][3][4]. Among these types of wetlands, the vertical subsurface flow constructed wetlands (VSFCW) require less area and strong oxygen transfer capability and have been widely used in the treatment of micro-polluted lake water [5,6].…”

Section: Introductionmentioning

confidence: 99%

Purification of Micro-Polluted Lake Water by Biofortification of Vertical Subsurface Flow Constructed Wetlands in Low-Temperature Season

Gao

Zhang

et al. 2022

Water

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In this study, a novel lab-scale biofortification-combination system (BCS) of Oenanthe javanica and Bacillus series was developed to improve the treatment ability of vertical subsurface flow constructed wetlands (VSFCW) at low temperatures (0–10 °C). The results showed that BCS-VSFCW overcame the adverse effects of low temperature and achieved the deep removal of nutrients. In addition, the removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) by BCS-VSFCW were 38.65%, 28.20%, 18.82%, and 14.57% higher than those of blank control, respectively. During the experiment, Oenanthe javanica and low temperature tolerant Bacillus complemented each other in terms of microbial activity and plant uptake. Therefore, VSFCW combined with Oenanthe javanica and low temperature tolerant Bacillus has a promising future in low temperature (<10 °C) areas of northern China.

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“…Currently, LCA studies in active systems such as the ATUs have shown important changes in the environmental performance when the source of electricity generation (coal, gas, oil, solar) is altered for one or another specific location, this is due to the permanent and high demand of electricity for its operation (De Feo & Ferrara 2017;Mirra et al 2020). Conversely, amendments of the construction material to better target specific pollutants or to improve the quality of the discharge have resulted in inconsistent impacts on the overall environmental performance of the CW systems (Cao et al 2021;Deng et al 2021;Diaz-Elsayed et al 2017;Yang et al 2018;Shen et al 2020;Zhou et al 2020). The availability of new materials that may be used in the substrate can enhance the removal efficiencies of different pollutants in CWs and shrink the gap in the treated wastewater quality currently existing between CWs and ATUs.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

“…The availability of new materials that may be used in the substrate can enhance the removal efficiencies of different pollutants in CWs and shrink the gap in the treated wastewater quality currently existing between CWs and ATUs. Concerning this, the use of biochar, a prefabricated material based on carbon, has shown promising results in improving the efficiency of CWs for domestic wastewater treatment, specifically as a substrate material (De Rozari et al 2015;Deng et al 2021). However, it has not yet been established if the improved pollutant removal efficiency will enhance the overall environmental performance.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Comparative life cycle assessment of aerobic treatment units and constructed wetlands as onsite wastewater treatment systems in Australia

Gongora

Hanandeh

2021

Water Science and Technology

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Life Cycle Assessment was used to evaluate onsite wastewater treatment systems (OWTS): aerobic treatment unit (ATU) with reinforced concrete (C.ATU) and HDPE (H.ATU) tank; and constructed wetland (CW) with three biochar concentrations in the substrate (0%; 10, and 20% v:v), dubbed CW.BC0, CW.BC10 and CW.BC20, respectively. CML 2001 in SimaPro® was used to evaluate the impacts of the treatment of 1 m3 wastewater. The OWTS were compared on their overall environmental performance scores (OEP). ATUs have higher impacts on human toxicity, eutrophication, freshwater and marine ecotoxicity. The CW.BC20 has the lowest global warming impact (GWP) while CW.BC0 has the highest. Electricity consumption was the largest contributor to the impacts of the ATUs. PVC pipes, coir peat, geomembrane, and electronic devices were the biggest contributors to the impacts of the CWs. The OEP of the CWs were almost a third of the ATUs’ (6.07E-03). Changes in electricity sources were tested according to the 2030-Australian targets; increasing renewables share improves the OEP of ATUs by 39%; nevertheless, CWs continue to outperform the ATUs. Variations in biochar biodegradation has small effect on the OEP of CWs; being relevant only to GWP. This study provides a reference to policy makers for better evaluation of OWTS.

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Application of biochar as an innovative substrate in constructed wetlands/biofilters for wastewater treatment: Performance and ecological benefits

Cited by 142 publications

References 67 publications

Optimization of Micro-Pollutants’ Removal from Wastewater Using Agricultural Waste-Derived Sustainable Adsorbent

Optimization of Micro-Pollutants’ Removal from Wastewater Using Agricultural Waste-Derived Sustainable Adsorbent

Purification of Micro-Polluted Lake Water by Biofortification of Vertical Subsurface Flow Constructed Wetlands in Low-Temperature Season

Comparative life cycle assessment of aerobic treatment units and constructed wetlands as onsite wastewater treatment systems in Australia

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