Influencing Parameter of Self Purification Process in the Urban Area of Cikapundung River, Indonesia

Abstract

Self-purification process is an important process in the effort of recovering the river condition itself. This process usually takes place naturally. However, several inhibitions might disturb the process. It was indicated by the slow deoxygenation rate and unhealthy river condition. This research aims to identify the influence parameters responsible for the slow of self-purification in the Cikapundung River, which is located in the urban area of Bandung City, Indonesia. The river water samples were taken and analyzed in the laboratory to obtain the water quality. The deoxygenation rate was also calculated based on the Slope Method after data was acquired from 10 days daily observation. Research showed that the value of urban river deoxygenation rate is relatively low. The low value of the rate of deoxygenation led to the difficulty in rivers to purify themselves. Pollutants inhibiting the process include phenol, detergent, and heavy metals, which are contaminating the river over the maximum standard. Biologically, the decomposer consists in the river is few. It leads to a slow organic degradation rate. The condition is representing the low capacity of self-purification of the Cikapundung River which is caused mainly by chemical and biological parameters.

Determination of Deoxygenation Rate of Urban River Using Modification Methods for Citepus River Water, Bandung, Indonesia

“…The deoxygenation rate value obtained in this research is higher than those of the previous studies. Cikapundung River study that used laboratory observations for 10 days obtains the value of the deoxygenation rate ranges from 0.01 to 0.37 per day (Yustiani et al, 2018). A study at the Cicadas River water shows a deoxygenation rate ranging from 0.01 to 0.17 per day (Yustiani et al, 2019).…”

Climate change impact assessment on a tropical river resilience using the Streeter-Phelps dissolved oxygen model

“…The low temperature severely inhibits the microbial activity since most heterotrophic microorganisms responsible for transforming dissolved organic matter to CO 2 are mesophilic, with an optimal metabolism at temperatures between 20-35 °C. Therefore, there are the minimum acceptable conditions to biodegrade the organic matter and nutrients (Yustiani et al, 2018;Zhou et al, 2018).…”

Challenges and Opportunities for Septage Management in the Urban Areas of Indonesia – Case Study in Bandung City

“…Open defecation is mainly practiced by people who live in slum areas nearby the river, which causes water quality deterioration in the Cikapundung river, a tributary of the Citarum River. Because of excess discharge of untreated domestic wastewater, the Citarum river is classified as in the top 10 worst polluted rivers in the world [15][16][17]. Meanwhile, results from the household questionnaire surveys showed that only 37.47% of the population were served by septic tanks and the septage sludge generated from these tanks was properly emptied, collected by either PDAM or private companies and legally dumped at designated dumping points connected to sewer networks.…”