Treatment of Metformin-Containing Wastewater by a Hybrid Vertical Anaerobic Biofilm-Reactor (HyVAB)

Janka, Eshetu; Carvajal, Diego; Wang, Shuai; Bakke, Rune; Dinamarca, Carlos

doi:10.3390/ijerph16214125

Cited by 9 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the HyVAB reactor represents a compact integrated system with low footprint, low capital expenditures and high efficiency in organic removal, energy recovery and emission prevention. Very recently, the same research group tested a pilot HyVAB reactor for the treatment of wastewater containing metformin, a widely used antidiabetic drug [67]. To achieve complete metformin removal, it was proposed to co-digest pharmaceutical-containing wastewater with the wastewater rich of easily degradable organics.…”

Section: Anaerobic and Hybrid (Anaerobic-aerobic) Bioreactorsmentioning

confidence: 99%

Advanced Bioreactor Treatments of Hydrocarbon-Containing Wastewater

2020

View full text Add to dashboard Cite

This review discusses bioreactor-based methods for industrial hydrocarbon-containing wastewater treatment using different (e.g., stirred-tank, membrane, packed-bed and fluidized-bed) constructions. Aerobic, anaerobic and hybrid bioreactors are becoming increasingly popular in the field of oily wastewater treatment, while high concentrations of petroleum hydrocarbons usually require physico-chemical pre-treatments. Most efficient bioreactor techniques employ immobilized cultures of hydrocarbon-oxidizing microorganisms, either defined consortia or mixed natural populations. Some advantages of fluidized-bed bioreactors over other types of reactors are shown, such as large biofilm–liquid interfacial area, high immobilized biomass concentration and improved mass transfer characteristics. Several limitations, including low nutrient content and the presence of heavy metals or toxicants, as well as fouling and contamination with nuisance microorganisms, can be overcome using effective inocula and advanced bioreactor designs. The examples of laboratory studies and few successful pilot/full-scale applications are given relating to the biotreatment of oilfield wastewater, fuel-contaminated water and refinery effluents.

show abstract

Section: Anaerobic and Hybrid (Anaerobic-aerobic) Bioreactorsmentioning

confidence: 99%

Advanced Bioreactor Treatments of Hydrocarbon-Containing Wastewater

2020

View full text Add to dashboard Cite

show abstract

“…The reactor is divided into two major components: Water enters into the upflow anaerobic sludge bed section (i.e., lower compartment) and flows up into the aerated top section. The aerated section can be operated either as continuous flow intermittent cleaning biofilm (CFIC ® , (Biowater Technology AS, Tønsberg, Norway)) or as moving bed biofilm processes [21][22][23]. A gas separator between the anaerobic and aerobic parts collects biogas while water flows upwards.…”

Section: Shortcut To Traditional Biological Nitrogen Removalmentioning

confidence: 99%

Effect of Intermittent Aeration in a Hybrid Vertical Anaerobic Biofilm Reactor (HyVAB) for Reject Water Treatment

Sivalingam

Dinamarca

Wakjera

et al. 2020

Water

View full text Add to dashboard Cite

Water from anaerobic sludge dewatering (reject water that is recycled to the inlet main process treatment) from the Knarrdalstrand municipal wastewater treatment plant in Porsgrunn, Norway, contains 2.4 g/L of total chemical oxygen demand (TCOD) and 550 mg/L NH4-N (annual average). The high concentration of ammonium causes disturbances in the mainstream physical and chemical processes, while only a small fraction of the organics is biodegradable. A pilot-scale hybrid vertical anaerobic biofilm (HyVAB) reactor combining anaerobic and aerobic treatment was tested for reject water treatment to reduce process disturbances. The pilot HyVAB was prepared for the study with continuous aeration of the aerobic part of the reactor for 200 days, while two intermittent aeration schemes were applied during the three-month test period. Ammonium removal efficiency increased from 8% during the continuous aeration period to 50% at the end of the test when a short (7 min) aeration cycle was applied. COD removal was close to 20%, which was mainly obtained in the anaerobic stage and not significantly influenced by the aerations schemes. Simultaneous partial nitrification and denitrification were established in the biofilm that alternated between aerobic and anoxic conditions. The observed high ammonium removal is explained by two alternative shortcut processes via nitrite. The lack of biodegradable organics in the aerated stage suggests that most of the nitrogen removal was via the anammox pathway (autotrophic denitrification). The HyVAB, combining an anaerobic sludge bed and an intermittently aerated biofilm, appears to be an efficient process to treat high ammonium containing reject water.

show abstract

“…While the presence of such drugs in the natural environment may be partly ascribed to the release of their metabolised and unmetabolized fractions via normal excretion from the human body, a certain proportion of them is traceable to inappropriate disposal methods. For example, metformin, a drug used to treat diabetic patients, has been reported in municipal wastewaters due to both normal excretions and inappropriate disposal via sinks and toilet drains [ 7 ]. Similarly, anti-retroviral drugs (so-called ARVs) for treating HIV/AIDS patients have been found in both surface water bodies and wastewater treatment plants [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Household Pharmaceutical Waste Management Practices in the Johannesburg Area, South Africa

Magagula

Rampedi

Yessoufou

2022

IJERPH

View full text Add to dashboard Cite

Pharmaceutical wastes are expected to increase given the increasing population growth rates and rapidly rising economic burden of human diseases. This challenge calls for appropriate measures for the management of such hazardous wastes. The purpose of this survey was to document and investigate existing practices for the handling, storage, and disposal of household pharmaceutical wastes (HPWs) in the Johannesburg area. Primary data were collected via online surveys with self-administered questionnaires completed by respondents. The research found that 77% (n = 286) of respondents claimed some knowledge about HPWs. Types of medicines that contributed to HPWs included painkillers or analgesics (73%, n = 270) and drugs for treating colds and flu-related illnesses (52%; n = 193). Although there were a few exceptions, the respondents generally exhibited strong disagreements with environmentally unfriendly and health-threatening disposal practices. Moreover, most participants were willing to return expired medicines to pharmacies (40.7%, n = 151), whereas only 8.6% (n = 32) opposed this solution. Awareness levels tended to vary with employment status, educational qualifications, and place of residence. However, place of residence and household size did not correlate with types of pharmaceutical waste. Additionally, the study found that education attainments significantly influenced the willingness of respondents to return pharmaceutical wastes. Finally, there were no significant differences amongst respondents in terms of waste disposal practices. Altogether, the findings suggest the need for targeted efforts to bring about sustainable waste management at a household level.

show abstract

Treatment of Metformin-Containing Wastewater by a Hybrid Vertical Anaerobic Biofilm-Reactor (HyVAB)

Cited by 9 publications

References 26 publications

Advanced Bioreactor Treatments of Hydrocarbon-Containing Wastewater

Advanced Bioreactor Treatments of Hydrocarbon-Containing Wastewater

Effect of Intermittent Aeration in a Hybrid Vertical Anaerobic Biofilm Reactor (HyVAB) for Reject Water Treatment

Household Pharmaceutical Waste Management Practices in the Johannesburg Area, South Africa

Contact Info

Product

Resources

About