The Influence of Calcium Hypochlorite Dosage Adjustment on Tapioca Wastewater Pre-Chlorination Toward Efficiency of Activated Sludge Treatment

Mulyani, Happy; Pamungkas, Guruh Sri

doi:10.20884/1.jm.2016.11.2.213

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Moreover, increase of chlorine dose will further decrease effluent COD concentration in activated sludge process and required aeration time. However, the best effluent COD concentration which still valued at 1,538 mg/L (Mulyani and Pamungkas, 2016) shows that further pretreatment optimization is still needed.…”

Section: Introductionmentioning

confidence: 99%

Study of COD Removal Rate on a Sequencing Batch Reactor (SBR) Treating Tapioca Wastewater

et al. 2019

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Industrial wastewater treatment using Sequencing Batch Reactor (SBR) can improve effluent quality at lower cost than that obtained by other biological treatment methods. Further optimization is still required to enhance effluent quality until it meets standard quality and to reduce the operating cost of treatment of high strength organic wastewater. The purpose of this research was to determine the effect of pretreatment (pH adjustment and prechlorination) and aeration time on effluent quality and COD removal rate in tapioca wastewater treatment using SBR. Pretreatment was done by (1) adjustment of tapioca wastewater pH to control (4.92), 7, and 8, and (2) tapioca wastewater prechlorination at pH 8 during hour using calcium hypochlorite in variation dosages 0, 2, 4, 6 mg/L Cl2, SBR operation was conducted according to following steps: (1) Filling of pre-treated wastewater into a bioreactor during 1 hour, and (2) aeration of the mixture of tapioca wastewater and activated sludge during 8 hours. Effluent sample was collected at every 2-hours aeration for COD analysis. COD removal rate mathematical formula was got by first deriving the best fit function between aeration time and COD. Optimum aeration time resulting in no COD removal rate. The value of COD effluent and its removal rate in optimum aeration time was used to determine the recommended of operation condition of pretreatment. Research result shows that chosen pH operation condition is pH 8. Prechorination can make effluent quality which meets standard quality and highest COD removal rate. The chosen Cl2 dosage is 6 mg/L.

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Section: Introductionmentioning

confidence: 99%

Study of COD Removal Rate on a Sequencing Batch Reactor (SBR) Treating Tapioca Wastewater

et al. 2019

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Multivariate Statistical Application for the Assessment of Surface Water Quality in Lower Zab River, Kirkuk

Mohammed

Almaliki

Qasim

et al. 2020

Wseas Transactions on Environment and Development

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Spatiotemporal variation analysis of water quality in the river is very vital for water resources protection and sustainable consumption. In this study, Multivariate statistical methods, i.e., Principal Component Analysis (PCA), Canonical Correlation Analysis (CCA) and Multi Recreation Analysis (MRA) were used to interpret of data matrix in water quality over a period of five years (2015–2019) in the Lower Zab River. The results from PCA matrix showed high positive correlation between total hardness and sulphate (SO4) at 95% confidence level (0.934) indicating that non-carbonate hardness is a measure in the river. By using Varimax rotation and by extracting the eigenvalues greater than 1 from the correlation matrix, number of significant principal components (PCs) were extracted. Five and four latent factors respectively in Lower Zab station 3 (LZ3) and Lower Zab station 2 (LZ2) were identified as responsible for the data structure, explaining 86.8% of total variance in winter season in LZ3 station and it is strong positive related to the SO4, nitrate (NO3), chloride (CL) and pH. All these variables are related to the weathering of minerals component of the river. 87.5% of total variance for winter season in LZ2 station, which is strongly positive, related to the NO3, pH, sodium (NA) and magnesium (MG) related to the weathering of minerals component. The strong correlations between PC3 and five-day biochemical oxygen demand (BOD5) as a result of CCA in LZ3 station during summer season, indicates that the high concentration of calcium (CA) and dissolved oxygen (DO) in water cause the low concentration of BOD5. Among 72 multiple regression model run, only eight dependent variables had statistically significant relationships with independent variables. These results provide may useful information for water quality in the Lower Zab River, which can mainly affected by weathering of minerals component of the river, soil structure and run-off.

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Optimization of tapioca wastewater treatment in sequencing batch reactor (SBR) using alkaline pre-chlorination

Budianto¹,

Mulyani²,

Margono³

et al. 2020

Desalination and Water Treatment

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The Influence of Calcium Hypochlorite Dosage Adjustment on Tapioca Wastewater Pre-Chlorination Toward Efficiency of Activated Sludge Treatment

Cited by 3 publications

References 7 publications

Study of COD Removal Rate on a Sequencing Batch Reactor (SBR) Treating Tapioca Wastewater

Study of COD Removal Rate on a Sequencing Batch Reactor (SBR) Treating Tapioca Wastewater

Multivariate Statistical Application for the Assessment of Surface Water Quality in Lower Zab River, Kirkuk

Optimization of tapioca wastewater treatment in sequencing batch reactor (SBR) using alkaline pre-chlorination

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