scholarly journals TREATING PALM OIL MILL EFFLUENT BY ACTIVATED SLUDGE PROCESS USING SUBMERGED MECHANICAL AERATOR/AGITATOR REPLACING SURFACE AERATOR

2019 ◽  
Vol 81 (3) ◽  
Author(s):  
Yahaya Hawari ◽  
Wira Jazair Yahya ◽  
Ikuma Sonda ◽  
Hirotaka Kawashima ◽  
Zahari Mohamad ◽  
...  
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Palm Oil ◽  
Removal Rate ◽  
Palm Oil Mill Effluent ◽  
Aeration Tank ◽  
Water Quality Criteria ◽  
Activated Sludge Process ◽  
Activated State ◽  
Palm Oil Mill

Activated sludge process (ASP) is gaining recognition as a process technique for the control of biological oxygen demand (BOD) in palm oil mill effluent (POME). Surface aerators or diffusing plates are often used in aeration tanks serving as core of the ASP. For consistent improvement in water quality within the aeration tank utilising the ASP and in particular, mitigating its BOD effluent stream, this study replaced the surface aerator with submerged mechanical aerator/agitator incorporating separate “agitation function” and “agitation diffusing function” intended for use in aeration tank of polishing plant that contains surface aerators. In order to confirm the activated state of the sludge in the aeration tanks, sludge was observed by microscopy (magnification 600 ´ or lower). The water analysis, POME, BOD, ammonium, and total nitrogen were analsyed. As a result of the study, improvement in water quality criteria including the agitation state in the aeration tank, mixed liquid dissolved oxygen, and BOD were observed. The BOD has improved from 34.7% to 93.1% at a maximum removal rate.

Treatment System of Wastewater from Rural Settlements with Batch-Activated Sludge Process

1993 ◽  
Vol 28 (10) ◽  
pp. 223-232 ◽  
Author(s):  
Y. Yuyama ◽  
K. Fujino ◽  
Y. Miyamoto ◽  
R. Oonishi
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Removal Rate ◽  
Treatment System ◽  
Aeration Tank ◽  
Activated Sludge Process ◽  
Rural Settlements ◽  
Time Data ◽  
Treated Water ◽  
Remote Monitoring System

The treatment system for rural communities with Batch-Activated Sludge Process was improved. The focus was on removal of nitrogen by intermittent aeratyion. Following the experimental results, treated water quality lower than 10 mg/l of BOD and T-N was ensured throughout the year, under the operational conditions of hydraulic retention time in aeration tank longer than 24 h and MLSS higher than 2,500 mg/l. Treated water quality of T-N was less than 5 mg/l within cumulative frequency of 66%. Removal capacity of T-N did not reach its limit under condition less than 0.05 kgN/m3d−1 of influent load. Estimating from the nitrogen removal rate, consumption of alkalinity, characteristics of biomass growth and the amount of nitrogen content in MLSS, 77% of influent nitrogen was denitrified, 18% of that was discharged as treated water and 5% of that was extracted as excess sludge or SS in treated water. Fluctuation patterns of DO and ORP in a cycle by seasonally changed water temperature were effective indices for regulation of operation. A remote monitoring system was helpful to support the management, because it enabled maintenance staff to judge urgency of management from the latest real time data.

scholarly journals Comparison of Performance of an Intermittent Aeration Membrane Bioreactor and a Conventional Activated–sludge System in the Treatment of Palm Oil Mill Effluent

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
S. Annop ◽  
P. Sridang ◽  
P. Chevakidagarn ◽  
K. Nopthavorn
Keyword(s):  
Activated Sludge ◽  
Palm Oil ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Palm Oil Mill Effluent ◽  
Oil And Grease ◽  
Stage Of Development ◽  
Working Volume ◽  
Dissolved Oxygen Control ◽  
Palm Oil Mill

The main objective was to compare the performances and the removal efficiencies of two biological treatment systems, a submerged membrane bioreactor (SMBR) and a simultaneous activated sludge (AS), for treating Palm Oil Mill Effluent (POME). Two lab scale units of SMBR and AS with a working volume of 24 L were operated under favorable biological conditions and minimized membrane fouling intensity. To achieve both carbonaceous and nitrogen removal, the cyclic air intermittent and dissolved oxygen control were performed into SMBR and AS with the influent flow rate about 16 L/d respectively. In terms of organic removal and membrane performance, the SMBR showed good removal efficiency to treat high strength wastewater with organic loading variation of POME. The average removal rates of TCOD, BOD, Turbidity, Color, Oil and Grease, NH3–N, TKN were 69±2, 76±2, 100±1, 37±21, 92±6, 67±4 and 75±10% respectively. Results pointed out the benefit of membranes retained totally the active compositions of biomass in each stage of development. The AS showed the limitation of sedimentation phase for sludge and oil separation. The characteristics of sludge in SMBR showed healthy floc formations and good settling after 240 h. The concentrations of COD and BOD in permeate were around 870±53 and 37±13 mg/L.

scholarly journals Augmented yeast-extract and diary-waste for enhancing bio-decolourization of palm oil mill effluent using activated sludge

2020 ◽  
Vol 36 ◽  
pp. 101263 ◽  
Author(s):  
Mohammed Abdulsalam ◽  
Hasfalina Che Man ◽  
Khairul Faezah Yunos ◽  
Zurina Zainal Abidin ◽  
Aida Isma Idris ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Yeast Extract ◽  
Palm Oil ◽  
Palm Oil Mill Effluent ◽  
Palm Oil Mill

Respirometric analysis of activated sludge models from palm oil mill effluent

2010 ◽  
Vol 101 (1) ◽  
pp. 144-149 ◽  
Author(s):  
A. Damayanti ◽  
Z. Ujang ◽  
M.R. Salim ◽  
G. Olsson ◽  
A.Z. Sulaiman
Keyword(s):  
Activated Sludge ◽  
Palm Oil ◽  
Palm Oil Mill Effluent ◽  
Palm Oil Mill ◽  
Activated Sludge Models

Nocardia scum suppression technology by ozone addition

1996 ◽  
Vol 34 (3-4) ◽  
pp. 283-290 ◽  
Author(s):  
T. Okouchi ◽  
M. Goi ◽  
T. Nishimura ◽  
S. Abe ◽  
T. Murakami
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Aeration Tank ◽  
Activated Sludge Process ◽  
Raw Water ◽  
Treated Water ◽  
The Real ◽  
Ozone Addition ◽  
Nocardia Sp ◽  
Real Plant

In order to suppress scum formation due to Nocardioform Actinomycetes (Nocardia sp.), an experiment was made by adding ozone at a small rate in the aeration tank of the real plant in operation based on the oxygen activated sludge process. It was clarified that adding ozone at a rate of above 1.2 mg/l-raw water suppressed scum and Nocardia. The treated water quality was good, and no influence of ozone on the activated sludge was seen.

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