Domestic wastewater treatment with aeration and addition of Pseudomonas putida bacteria

Abstract

The research was conducted to recognize the quality of domestic wastewater in the Kedung Tungkul Domestic Wastewater Installation Processor (Kedung Tungkul DWIP) and to recognize the effect of aeration and Pseudomonas putida addition. The analysis of this research based on the enhancement of wastewater quality by using the indicator of pH, BOD, TSS, oil and fat judged against the quality standard of domestic wastewater according to The Resolution of The Ministry of State of Environment Affairs by means of License Number 112 in the year of 2003. In conducting the research, the value of pH, TSS, BOD, oil and fat analyzed from the influent and effluent of Kedung Tungkul DWIP. Then the influent of Kedung Tungkul DWIP was treated in laboratory by aeration and Pseudomonas putida addition. The aims of the treatment were to improve the quality of domestic wastewater than accomplished to the standard quality. Each parameter was analyzed by using T test to recognize the difference of influent and effluent in the Kedung Tungkul DWIP, two ways Analysis of Varian (ANOVA) and Duncan Multiple Range Test (DMRT) to recognize the best treatment in the laboratory. Then, the data was matched up to the quality standard of domestic wastewater according to The Resolution of the Ministry of State of Environment Affairs. The results of the research showed that the influent and effluent of Kedung Tungkul DWIP have no differences on the value of pH and TSS. For the meantime there were differences between the values of BOD, oil, and fat. Compared to the quality standard of domestic wastewater, the values of pH (17,33% increase) and BOD (71,48% decrease) have accomplished the standard quality while the value of TSS (22,09% decrease), oil and fat (45,99% decrease) have not accomplished yet. The result of value measurement of the treatment in laboratory showed that there was no difference on the value of pH and has accomplished the standard quality for all treatment, temporarily there were differences on the values of BOD, TSS, oil and fat. For BOD, oil and fat parameter, the best treatment was on A Bioreactor (aerated by 2 l/minute oxygen about 216 hours with 1010 cell/ml Pseudomonas putida bacteria addition about 1000 ml in 10 l domestic wastewater) reached 89,19% decrease for BOD and 93,18% for oil and fat. For TSS parameter, the best treatment was on B Bioreactor (aerated by 2 l/minute oxygen about 216 hours with 1010 cell/ml Pseudomonas putida bacteria addition about 500 ml in 10 l domestic wastewater) reached 90,77% decrease. Compared to the quality standard of domestic wastewater, the values of pH, BOD, and TSS have accomplished the standard quality, while the values of oil and fat have not accomplished yet.