Filter Media-Packed Bed Reactor Fortification with Biochar to Enhance Wastewater Quality

Kholoma, Ezekiel; Renman, Agnieszka; Renman, Gunno

doi:10.3390/app10030790

Cited by 4 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An improved P removal efficiency (25.6%) was observed in the biochar‐amended sand column compared with the 100% sand column (19.3%) when treating wastewater (Kholoma et al., 2016). In another study, the addition of a top biochar layer (0.2 m) to the sand layer (0.3 m) reduced the final effluent TP to 6.2 ± 1.0 mg P L −1 , compared with 7.6 ± 1.0 mg P L −1 in the control 0.5‐m sand layer effluent when treating domestic wastewater (Kholoma et al., 2020). In another approach, biochar was mixed with the filter media.…”

Section: Application Of Biochar In Biofiltration Systems For P Removalmentioning

confidence: 99%

Biochar application in biofiltration systems to remove nutrients, pathogens, and pharmaceutical and personal care products from wastewater

Shahraki

Mao

2022

J of Env Quality

View full text Add to dashboard Cite

Although conventional on‐site wastewater treatment systems (OWTSs) provide only primary treatment of domestic wastewater, removal of a limited level of nutrients (N, P), pathogens, and pharmaceuticals and personal care products (PPCPs) could be achieved by such a treatment process. Biochar has the capacity to remove various contaminants and has been widely used as an ideal soil amendment in agriculture due to its persistence, superior nutrient‐retention properties, low cost, and ready availability. However, few applications on the use of biochar in onsite wastewater treatment have been explored. In this review, we systematically reviewed the applications of biochar in filtration‐based OWTSs for nutrient (N, P) removal and recovery as well as pathogen and PPCP removal. Although adsorption was the main mechanism for P, pathogen, and PPCP removal, biochar can also serve as the growth media for enhanced biological degradation, improves available alkalinity, and increases water holding capacity in the OWTSs. The biochar source, surface modification methods, and preparation procedures (e.g., pyrolysis temperature change) have significant effects on contaminant removal performance in biochar‐amended OWTSs. Specifically, contradictory results have been reported on the effect of pyrolysis temperature change on biochar removal performance (i.e., increased, decreased, or no change) of N, P, and PPCPs. Wastewater composition and environmental pH also play important roles in the removal of nutrients, pathogens, and PPCPs. Overall, biochar holds great potential to serve as an alternative filtration material or to be amended to the current OWTS to improve system performance in removing a variety of contaminants at low cost.

show abstract

Section: Application Of Biochar In Biofiltration Systems For P Removalmentioning

confidence: 99%

Biochar application in biofiltration systems to remove nutrients, pathogens, and pharmaceutical and personal care products from wastewater

Shahraki

Mao

2022

J of Env Quality

View full text Add to dashboard Cite

show abstract

“…Kholoma et al . (2020) tested the efficiency of gas–concrete and retrofitting sand (Sa)‐packed reactors with biochar (C) in removing DOC, total phosphorus (P tot ), phosphate (PO 4 3− ) and turbidity from wastewater. All bioreactors attained <3 Nephelometric turbidity units (NTU) and 99% effluent turbidity.…”

Section: Packed Bed Reactormentioning

confidence: 99%

“…Batch wastewater treatment revealed 30%, 28%, 26%, 61% and 56% of COD removal efficiencies for the PU and PU/(PPy-co-PANI) composites obtained at 40 W; 55 min, 30 W; 45 min, 50 W; 30 min and 45 W; 40 min after 48 h, respectively; which was linked with the morphology of the polymer deposited onto the PU foam surface. The composite of PU/(PPy-co-PANI) received at 50 W; 30 min (air plasma first) was examined in the continuous wastewater treatment showed 76% of COD removal at 54 h of hydraulic retention time Kholoma et al (2020). tested the efficiency of gasconcrete and retrofitting sand (Sa) packed reactors with biochar (C) in removing DOC, total phosphorus (P tot ), phosphate (PO 4 3− ) and turbidity from wastewater.…”

mentioning

confidence: 99%

A comprehensive review on application of bioreactor for industrial wastewater treatment

Meena

Yadav

Sonigra

et al. 2021

Letters Applied Microbiology

View full text Add to dashboard Cite

In the recent past, wastewater treatment processes perform a pivotal role in accordance to maintain the sustainable environment and health of mankind at a proper hygiene level. It has proven as indispensable by government regulations throughout the world due to the importance of preserving freshwater bodies. Human activities, predominantly from industrial sectors, generate an immeasurable amount of industrial wastewater loaded with toxic chemicals, which not only cause dreadful environmental problems but also leave harmful impacts on public health. Hence, industrial wastewater effluent must be treated before releasing into the environment to restrain the problems related to industrial wastewater discharge to the environment. Nowadays, biological wastewater treatment methods have been considered as an excellent approach for industrial wastewater treatment process because of their cost-effectiveness in the treatment, high efficiency, and their potential to counteract the drawbacks of conventional wastewater treatment methods. Recently, the treatment of industrial effluent through bioreactor has proven as one of the best methods from the presently available methods. Reactors are the principle part of any biotechnology-based method for microbial or enzymatic biodegradation, biotransformation, and bioremediation. This review aims to explore and compile the assessment of the most appropriate reactors, like, packed bed reactor, membrane bioreactor, rotating biological contactor, up-flow anaerobic sludge blanket reactor, photobioreactor, biological fluidized bed reactor, continuous stirred tank bioreactor, etc. that are extensively used for distinct industrial wastewater treatment.

show abstract

“…The efficiency of single-pass and vertical flow biochar filters in removing solids, organic matter, pathogen indicators and micropollutants from OWTSs has been assessed in previous studies [2,[17][18][19][20]. These unsaturated filters are designed to remove organic pollutants, with no consideration to removing nitrogen by denitrification.…”

Section: Of 13mentioning

confidence: 99%

Combined Vertical-Horizontal Flow Biochar Filter for Onsite Wastewater Treatment—Removal of Organic Matter, Nitrogen and Pathogens

2019

View full text Add to dashboard Cite

This study investigated the performance of a combined vertical-horizontal flow biochar filter (VFF-HFF) system in terms of organic matter, total nitrogen (Tot-N), Escherichia coli and Salmonella removal and explored the effects of hydraulic loading rate (HLR) on pollutant removal. The combined VFF-HFF system used biochar as the filter medium and comprised two stacked sections: (i) an aerobic vertical flow filter (VFF) in which the wastewater percolated through the biochar medium in unsaturated mode and (ii) a horizontal flow filter (HFF), in which the biochar was saturated with water and had limited access to air, to enable anaerobic conditions and enhance the denitrification process. The system was tested over 126 weeks using real wastewater applied at different HLR (23, 31, 39 L m−2 day−1). The results showed that long-term removal of organic matter in the entire system was 93 ± 3%, with most (87 ± 5%) occurring in the VFF. For Tot-N, the long-term removal was 71 ± 12%, with increasing trends for nitrification in the VFF and denitrification in the HFF. Mean long-term nitrification efficiency in the VFF was 65 ± 15% and mean long-term denitrification efficiency in the HFF 49 ± 14%. Increasing HLR from 23 to 31 L m−2 day−1 increased the nitrification efficiency from 42 to 61%. Increasing the HLR further to 39 L m−2 day−1 decreased the denitrification efficiency from 45 to 25%. HLR had no significant effects on VFF and HFF performance in terms of E. coli and Salmonella removal, although the VFF achieved a 1.09–2.1 log10 unit reduction and the HFF achieved a 2.48–3.39 log10 unit reduction. Thus, long-term performance, i.e., removal of pollutants measured during the last 52 weeks of the experiment, was satisfactory in terms of organic matter and nitrogen removal, with no signs of clogging, indicating good robustness of the combined VFF-HFF biochar filter system.

show abstract

Filter Media-Packed Bed Reactor Fortification with Biochar to Enhance Wastewater Quality

Cited by 4 publications

References 43 publications

Biochar application in biofiltration systems to remove nutrients, pathogens, and pharmaceutical and personal care products from wastewater

Biochar application in biofiltration systems to remove nutrients, pathogens, and pharmaceutical and personal care products from wastewater

A comprehensive review on application of bioreactor for industrial wastewater treatment

Combined Vertical-Horizontal Flow Biochar Filter for Onsite Wastewater Treatment—Removal of Organic Matter, Nitrogen and Pathogens

Contact Info

Product

Resources

About