Role of pH on biological Nitrification Process

Amatya, Iswar Man; Kansakar, Bhagwan Ratna; Tare, Vinod; Fiksdal, Liv

doi:10.3126/jie.v8i1-2.5102

Cited by 11 publications

(11 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result is in line with the findings of previous studies [40,46,47]. The biological system regained alkalinity afterwards from day 60 to 77 and this could be due to neutralization of hydrogen ions by bicarbonate ions in the solution which resulted to CO2 stripping [38,44]. As nitrification continued and became very effective up to steady-state, there were considerable reduction in pH which signifies efficient nitrifying activity.…”

Section: Ph Profilesupporting

confidence: 91%

“…Another factor that may have contributed to the relatively low nitrification in the system is pH. An average value of 7.0 were measured in the reactors at steady-state and which is below the range (7.3 -8.0) reported for efficient and stable nitrification [38]. Before reaching the steady-state, nitrification was more efficient in reactor 1 than in reactor 2.…”

Section: Removal Of Nutrientsmentioning

confidence: 84%

“…The observed fall was the effect of seed wastewater used for inoculation. Overtime, the system regained alkalinity which was subsequently consumed at the phase of effective nitrification as about 8.64 mg of HCO3is reported to be utilized for every mg of ammonia nitrogen oxidized to nitrate [38]. The later decrease in pH was due to the formation of hydrogen ions in the solution during ammonium oxidation to nitrite.…”

Section: Ph Profilementioning

confidence: 99%

“…As nitrification continued and became very effective up to steady-state, there were considerable reduction in pH which signifies efficient nitrifying activity. In earlier work [38] it was stated that about 8.64 mg of alkalinity (HCO3 -) are consumed for ammonia oxidation to nitrate which cumulatively affect pH stability. Thus, the further variations in pH in the present study could be aligned to the stated phenomenon.…”

Section: Ph Profilementioning

confidence: 99%

See 3 more Smart Citations

Appraisal of suspended growth process for treatment of mixture of simulated petroleum, textile, domestic, agriculture and pharmaceutical wastewater

Egbuikwem

Saroj

2019

Environmental Technology

View full text Add to dashboard Cite

The unrestricted discharge of domestic and industrial wastewaters along with agricultural runoff water into the environment as mixed-wastewater pose serious threat to freshwater 2 resources in many countries. Mixed-wastewater pollution is a common phenomenon in the developing countries as the technologies to treat the individual waste streams at source are lacking due to high operational and maintenance costs. Therefore, the need to explore the potential of suspended growth process (SGP) which is a well-established process technology for biological wastewater treatment, is the focus of this paper. Different wastewater constituents: representing domestic, pharmaceutical, textile, petroleum, and agricultural runoff were synthesized as a representative of mixed-wastewater and treated in two semicontinuous bioreactors (R1 & R2) operated at constant operating conditions vis., MLSS (mg/L): 4640-R1, 4440-R2, SRT: 21-d, HRT: 48 -72-h, and uncontrolled pH. The system attained stable condition in day 97, with average COD, BOD and TSS reduction as 84.5, 86.2, and 72.2% for R1; and 85.1, 87.9, and 75.1% for R2 respectively. Phosphate removal on average was by 74.3% in R1 and 76.6% in R2, while average nitrification achieved in systems 1 and 2 were 56.8and 54.7% respectively. The biological treatment system has shown potential for improving the quality of mixed-wastewater to the state where reuse may be considered and tertiary treatment can be employed to polish the effluent quality.

show abstract

Section: Ph Profilesupporting

confidence: 91%

Section: Removal Of Nutrientsmentioning

confidence: 84%

Section: Ph Profilementioning

confidence: 99%

Section: Ph Profilementioning

confidence: 99%

See 2 more Smart Citations

Appraisal of suspended growth process for treatment of mixture of simulated petroleum, textile, domestic, agriculture and pharmaceutical wastewater

Egbuikwem

Saroj

2019

Environmental Technology

View full text Add to dashboard Cite

show abstract

“…All leachates in our study were slightly basic and their pH decreased significantly in Time stamp 3. The optimum pH for the nitrification process is within the range of 7.8-9.0 [35], suggesting that the pH in our study, which was within this range in Time stamps 1 and 2, caused nitrification and higher NO 3 concentrations in leachate. The pH value dropped during nitrification [36], and our investigation confirmed this.…”

Section: The Impact Of Composting Procedures On the Leachate Quantity...supporting

confidence: 54%

The Quantity and Composition of Leachate from Hop Plant Biomass during Composting Process

et al. 2022

View full text Add to dashboard Cite

Technology that would result in a high-quality product with minimal environmental impact throughout the on-site composting process of hop biomass after harvest has not yet been developed. It is crucial to introduce composting practices that do not result in a detrimental leachate impact. Three different composting procedures that vary in terms of initial biomass particle size, additives, and pile covering were investigated. Each pile was built from 15 t of fresh hop biomass after harvest (leaves and stems), leachate was collected during the composting season (September to the end of April), and biomass was sampled and analyzed to identify good practices as well as gaps that need to be filled. Leachate quantity differed significantly in terms of the composting procedure and time stamps. There was a strong linear correlation between the amount of precipitation and leachate quantity (0.86), NH4 leached amount (0.87), and total N leached amount (0.92), but not the total P amount. The composting procedure had a significant impact on the quantity of the NH4 leached amount. The majority of the NH4 was lost in the second month of composting. The maturation phase was the most critical for NO3 loss since it had the highest amount of leached NO3 and the greatest variances among the composting protocols. Considering leachate it is recommended that a membrane is used at all times during the maturation phase as well as during any heavy precipitation expected in the thermophilic phase. Whether the cover is also needed for the entire duration of the thermophilic phase (due to emission) is a matter of further research.

show abstract

Impact of saline valorization in contaminated municipal wastewater on the treatment performance and bacterial community dynamics of a membrane bioreactor

Ittisupornrat

Theepharaksapan

krasaesueb

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Background: Due to salt intrusion and the improper use of seawater for cleaning and flushing in food shops along coastal regions, the aerobic biological wastewater treatment process may have an adverse effect on treatment performance. This study demonstrates membrane bioreactor (MBR) performance for treating saline-contaminated municipal wastewater. The aim of this study is to determine how much salt affects the efficiency of the process and how the functional bacterial community evolves in an MBR for treating actual municipal wastewater.Results: An MBR was applied for actual municipal wastewater treatment by increasing the NaCl concentration from 0 to 20 g L −1 with a hydraulic retention time of 12 h and complete sludge retention. High removal efficiencies of chemical oxygen demand (COD) (ranging from 80.3 to 82.8 mgL −1 ) and ammonium-N (ranging from 40.8 to 44.4 mgL −1 ) were found at salinity concentrations of up to 7.8 ± 0.8 g L −1 . However, the removal efficiency of COD was below 50% at high salinity concentrations of 17.9 ± 1.3 g L −1 , whereas the removal rate of ammonium-N had slightly changed with the value of 90%. In terms of bacterial composition, the largest dominant bacterial communities were Proteobacteria and Planctomycetota, both of which may be the predominant halotolerant/halophilic bacteria group. Additionally, Rhizobiales, Planctomycetales, Pirellulales, and Gemmatales (all of which are members of these phyla) were increased, suggesting that they played an important role in the biodegradation process. Conclusion:The MBR operation showed a good performance for treating municipal wastewater with high salinity concentrations, with a salt tolerance threshold of 7.8 g L −1 . The experimental results indicate that the MBR system can be applied for treating municipal wastewater that is occasionally contaminated with seawater.

show abstract

Role of pH on biological Nitrification Process

Cited by 11 publications

References 3 publications

Appraisal of suspended growth process for treatment of mixture of simulated petroleum, textile, domestic, agriculture and pharmaceutical wastewater

Appraisal of suspended growth process for treatment of mixture of simulated petroleum, textile, domestic, agriculture and pharmaceutical wastewater

The Quantity and Composition of Leachate from Hop Plant Biomass during Composting Process

Impact of saline valorization in contaminated municipal wastewater on the treatment performance and bacterial community dynamics of a membrane bioreactor

Contact Info

Product

Resources

About