scholarly journals Research of COD and BOD Removal Efficiency in Tempeh Industrial Wastewater Treatment using Aerated Activated Sludge

Tempeh is the most popular food in Indonesia. The process of making tempeh requires a lot of water. The preliminary analysis of tempeh wastewater showed that the value of COD, BOD and pH are 26693 mg/l, 11204 mg/l and 3,99. This results actually do not meet the Minister of Environment regulation No.5 (2014) about quality standard of wastewater treatment for industry. The quality standard for COD, BOD and PH for tempeh wastewater are 100-300 mg/l, 50-150 mg/l, and 6-9. So, the tempeh industrial wastewater must be processed before being discharged into the environment. The aim of this study is to determine the activated sludge ability to reduce COD, BOD, and also pH value in tempeh industrial wastewater. Tempeh industrial wastewater treatment carried out in aerated batch reactor using wastewater composition 10%, 15%, and 25% (v/v) of tempeh wastewater in 500 ml as a research variables. The wastewater while the hidraulic retention time is 48 hours. The highest COD, BOD removal efficiency occured at 25% (v/v) wastewater composition each for 74,58%, 79,27%. The COD and BOD concentration after treatment are 7625,79 mg/l and 4555,7 mg/l. And pH at 25% (v/v) wastewater composition is 6,92. pH value after treatment meet quality standard of industrial wastewater from Minister of Environment regulation No.5 (2014), but COD and BOD do not meet the standards.

1988 ◽  
Vol 20 (10) ◽  
pp. 201-210 ◽  
Author(s):  
S. Matsui ◽  
Y. Okawa ◽  
R. Ota

Twenty-eight process wastewaters and thirty-seven organic substances identified in the wastewater of the Kashima petrochemical complex were subjected to biodegradability tests. The tests consisted of the activated sludge degradability method and a supplementary test using the respiration meter method. Both tests utilized the activated sludge of the Fukashiba industrial wastewater treatment plant, which was acclimatized to the wastewater and organic substances. The 28 process wastewaters were classified into biodegradable, less biodegradable, and non-biodegradable according to the percentage TOC removal and the BOD5/TOC ratio of the wastewater. The 37 organic substances were also classified into biodegradable, less biodegradable and non-biodegradable according to TOC and CODMn removal. In general, chlorinated compounds, nitro-aromatics and polymerized compounds were difficult to biodegrade. From the biodegradability tests of the factory wastewaters, it was found that the refractory CODMn loads of these factories contributed to the load remaining in the effluent of the wastewater treatment plant. Various improvements were made to reduce the discharge of refractory substances from the factories.


2016 ◽  
Vol 72 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Carlo Salerno ◽  
Dirk Benndorf ◽  
Sabine Kluge ◽  
Luigi Leonardo Palese ◽  
Udo Reichl ◽  
...  

2014 ◽  
Vol 5 (6) ◽  
pp. 551-556
Author(s):  
Mamdouh Y. Saleh ◽  
◽  
Gaber El Enany ◽  
Medhat H. Elzahar ◽  
Mohamed Z. Elshikhipy ◽  
...  

2003 ◽  
Vol 47 (11) ◽  
pp. 289-295 ◽  
Author(s):  
Y. Peng ◽  
C. Gao ◽  
S. Wang ◽  
M. Ozaki ◽  
A. Takigawa

Deficiency in the nutrient supply such as nitrogen usually results in activated sludge bulking and this phenomenon often takes place in the industrial wastewater treatment plants with activated sludge process. The effects of nitrogen deficiency on activated sludge bulking were studied specially in some experiments carried out in a sequencing batch reactor fed with brewing process wastewater in this paper. The experimental results showed that the sludge settled properly at an influent BOD/N value of 100/4. When the value of BOD/N was 100/3, filaments had an excessive growth at one time during the reaction process. Afterwards, the number of filamentous bacteria began to reduce and simultaneously an excessive growth of viscous Zoogloea with high percentage of moisture was observed and non-filamentous activated sludge bulking occurred. When the influent BOD/N value was 100/2, the excessive growth of filamentous microorganisms could not be observed at all times and the sludge characterization was similar to the case in which BOD/N value was 100/3. When the value of influent BOD/N was 100/0.94, more serious non-filamentous bulking occurred. Furthermore, the effects of nitrogen deficiency on the nitrogen sources and phosphorus sources utilization rate and the COD removal rate were investigated in the experiments.


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