Environmental Engineering, Environmental Science, Biotechnology, Water Science and Technology
9
Scopus Publications
122
Scholar Citations
5
Scholar h-index
2
Scholar i10-index
Scopus Publications
Carbon Dioxide Gas Reduction Using the Absorption Method as an Effort to Support Carbon Capture and Storage (CCS) Technology O. H. Cahyonugroho, I. S. Putra, E. N. Hidayah, R. Novembrianto Nature Environment and Pollution Technology, 2025 Significant changes in global temperature occurred when carbon dioxide gas produced increases from industrial combustion processes that still use fossil fuels. These fuels contribute to environmental damage that will result in greenhouse gas emissions. One form of effort made by using Carbon Capture and Storage (CCS) technology is effectively able to reduce global warming. The reduction process is carried out using NaOH and KOH solutions by comparing the effectiveness of the captured gas. This study was conducted to determine the effect of solution and gas flow rates between NaOH and KOH absorbents on the removal of dissolved CO2 gas. The chosen methods were the sampling method and the alkalimetric method. The method was used to determine the variation of the absorbent flow rate of 2, 4, and 6 L.min-1. While the gas flow rate used is 10, 20, and 30 L.min-1. The results showed that the effective flow rate variation was obtained at a speed of 2 L.min-1 with a gas flow rate of 30 L.min-1. The concentration that is removed in the absorbent is 52% of CO2 gas absorbed in NaOH solution with an electric voltage of 0.817 Volt, while KOH is obtained by 48% with an electric voltage of 0.798 Volt. The analysis results will be used as electrochemical-based electrical energy. It can be concluded that the effective absorbent solution is NaOH which can reduce CO2 gas optimally, which has a correlation to the flow rate of the solution and gas and can produce electrochemical-based electrical energy
The ability of microalgae Nannochloropsis oculata to remove lead (Pb) from artificial wastewater Okik Hendriyanto Cahyonugroho, Chia Fifin, Euis Nurul Hidayah, Firra Rosariawari, Rizka Novembrianto Iop Conference Series Earth and Environmental Science, 2025 Pollution by industrial waste is increasingly prevalent, including pollution by heavy metal lead (Pb). Lead, which belongs to the extremely toxic category, can accumulate in the body and inhibit the growth and development of living things. One method of removing heavy metals is using the phycoremediation method. Phycoremediation is bioremediation by accumulating and absorbing pollutants using microalgae, which in this study used microalgae Nannochloropsis oculata. This study aimed to determine the ability of microalgae Nannochloropsis oculata to remove Pb. The variables in this study were the concentration of Pb waste (1, 5, and 10 mg/L) and the ratio of microalgae: wastewater media, namely 30 : 70. The study was carried out on a batch scale within 14 days with sampling times on days 0, 3, 6, 9, and 12. The number of microalgae cells was examined to determine the effect of Nannochloropsis oculata on Pb removal. The results showed that the microalgae Nannochloropsis oculata could remove heavy metal Pb up to an optimum condition of 0.19 mg/L with an optimum microalgae cell number of 439 × 104 cells/mL.
Oxidation ditches for wastewater recycling and reuse for long-term sustainability - A case study Restu Hikmah Ayu Murti, Muhammad Abdus Salam Jawwad, Praditya Sigit Ardisty Sitogasa, Riko Ferdinand Abdillah, Rizka Novembrianto, Muhammad Faisal Fadhil Iop Conference Series Earth and Environmental Science, 2025 The increasing problem of wastewater management remains reliant on onsite sanitation technology, which is used by 2.7 billion people globally, primarily in developing nations, and may reach 5 billion by the end of 2030. The world’s fastest-growing cities are driven to reevaluate sustainable development goals because they deal with inadequate or nonexistent sanitation sector management. A significant area of focus in sanitation is fecal sludge and septage, which has gained popularity recently as a practical and cost-effective way to create clean, healthy cities. The fecal sludge processing process at the Keputih IPLT Surabaya starts from feces transported by trucks, the feces are dumped into measuring tanks that have been installed with bars screen at the beginning of the unit. The OD unit used to remove organic material from the supernatant fecal sludge by utilizing microorganisms. The evaluation results and recommendations for the performance of the Oxidation Ditch processing unit at the Keputih IPLT show that of the 9 design criteria that have been determined, only the MLSS parameters do not meet the design criteria. The MLSS value was obtained by testing the supernatant in the OD and the MLSS result was 1960 mg/l, ideal design criteria for an MLSS value of 3000-6000 mg/l, it is necessary to optimize the aeration system.
Comparison of Fe-based and Al-based coagulants in the removal of organic and disinfection by-product precursors Euis Nurul Hidayah, Okik Hendriyanto Cahyonugroho, Rizka Novembrianto, Kindriari Nurma Wahyusi, Endang Srihari Clean Soil Air Water, 2024 Surface water is renowned for its natural organic matter, constituting approximately 45% of total dissolved organic carbon (DOC) which can be removed in water treatment plants. However, residual DOC in water can react with chlorine to form several carcinogenic disinfectant by‐products (DBPs). This study aimed to examine the molecular weight of organic fractions dissolved in three different water sources that act as precursors to the formation of DBPs species. The coagulants used were Al‐ and Fe‐based, frequently used in water treatment plants to remove organic fractions. Characterization of DOC in source water served as the first step in determining the performance of both coagulants in terms of organic properties. The results showed that the selected surface waters had similar DOC characteristics, including biopolymers, humic substances, building blocks, and a low molecular weight. These fractions contributed to the formation of trihalomethanes (THMs) and haloacetic acids (HAAs). The Fe‐based coagulant was more effective than the Al‐based coagulant in removing all organic fractions and reducing THMs compared to HAAs. Furthermore, one‐way ANOVA analysis showed a significant difference in the average removal of organic fractions and DBP species between the Fe‐based and Al‐based coagulants. The Fe‐based coagulant showed higher efficiency in removing biopolymers, dibromochloromethane, and chlorodibromoacetic acid than the Al‐based coagulant. In contrast, the Al‐based coagulant had better performance in reducing dibromo HAA and tribromo HAA. Both coagulants had no significant difference in extracting other organic fractions or DBPs species.
Performance evaluation of wastewater treatment plants in Taman’s public health center in Sidoarjo District Muslikha Nourma Rhomadhoni, Achmad Syafiuddin, Nabila Febrianti, Rizka Novembrianto Bali Medical Journal, 2023 Introduction: In general, wastewater produced by Public health centers contains many microorganisms, pathogenic compounds, and hazardous and toxic chemicals that can cause environmental pollution and transmit various diseases.1 The danger posed by the liquid waste produced is quite large, so it is necessary to have a wastewater treatment process before it is disposed of. Wastewater treatment is carried out using a wastewater treatment plant (WWTP). Thus, this study aims to evaluate the performance, environment and economy of WWTPs in Public health centers. Methods: This research uses descriptive quantitative research methods. The inclusion criteria were the laboratory data results in 2018 and 2019. The exclusion criteria were the data needed to be completed. The research variable was the performance of the WWTP on wastewater quality. The data analysis of the laboratory test results is analyzed and compared with the East Java Governor Regulation Number 72 of 2013 concerning Wastewater Quality Standards for Business and Hospital Activities. Results: The results of laboratory tests in 2018 showed the parameters by the requirements according to regulations, such as temperature, pH, BOD5, COD and TSS. At the same time, the parameters were not following requirements according to rules such as free NH3-N, PO4 and MPN-coliform bacteria. Data from laboratory test results in 2019 showed requirements according to regulations: temperature, pH, BOD5, and TSS. The effects on the COD parameter were seen only in July that they did not follow the requirements, while most of the results for the NH3-N, PO4 and MPN-free coli groups did not meet the criteria. Conclusion: Based on the research done in this study, the following conclusions can be drawn: The results of the performance evaluation of the WWTP at the Taman Public health center are included in the category that meets the stipulated regulatory requirements.
Implementation of COVID-19 prevention and control at PT. Port of indonesia III (PELINDO 3) Muslikha Nourma Rhomadhoni, Friska Ayu, Rizka Novembrianto, Octavianus Hutapea, Merry Sunaryo, Ratna Ayu Ratriwardhani, Moch. Sahri, Maya Nurahmadiana Bali Medical Journal, 2023 Introduction: The number of Covid-19 cases in Indonesia continues to increase in several places. Management support in producing realistic policies for business continuity during the pandemic is very much needed. This research is needed to provide an overview of the business community or business managers and or industry related to the implementation of Covid-19 control management at PT. Pelindo 3. Method: This is descriptive research. The sample is PT. Pelindo 3 head office, Surabaya. Data was taken using company secondary data related to the management of Covid-19 control. Data was collected using related document literature studies, observations, interviews, and documentation. Presentation of data carried out descriptively. To provide a clear picture of Pelindo 3's efforts in controlling Covid 19. Results: To prevent and control Covid 19 at PT. Pelindo 3, the company carries out all government directives, as well as human resource, financial, facilities, and infrastructure support. The company's ability can be proven by receiving an award from the Ministry of Manpower as a recipient of the Platinum Award in implementing the Covid 19 control and prevention program at the company in 2021. Conclusion: Management support in carrying out efforts to control Covid-19 is very good, starting from policy support and support for the realization of the Covid-19 control program, namely carrying out all government directives
Reducing nitrate and total phosphate by using oxidation ditch with microalgae chlorella sp. Reactor Euis Nurul Hidayah, Okik Hendriyanto Cahyonugroho Rasayan Journal of Chemistry, 2021 Microalgae is a microscopic plant that has chlorophyll for carrying out photosynthesis. Chlorella sp. is one of the most easily found microalgae in the aquatic. Chlorella sp needs some nutrients such as nitrate and total phosphate for growing. There are many ways to develop microalgae, and an algae reactor is more effective on a large scale. Algae reactor has the same concept with oxidation ditch by using different microorganisms. This study applied an oxidation ditch reactor filled with microalgae Chlorella sp for treating domestic wastewater in terms of nitrate and phosphate concentration. Variation of rotational speed airbrush (45 and 60 rpm) and ratio volume of waste to microalgae (3:1, 4:1, 5:1, 6:1) were performed. The sample was collected for 5 days and measured for nitrate and phosphate concentration. The result shows that the optimum removal of nitrate and total phosphate is about 63.64% and 66.15%, respectively, with an under-speed variation of 60 rpm and a volume ratio of 3: 1. This study concludes that oxidation ditch reactor-filled microalgae Chlorella sp had performed an effective process in removing nitrate and total phosphate under optimum speed rotation and a low ratio of waste microalgae.
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