Setyo Sarwanto Moersidik

The increase of impermeable surface is inversely proportional to infiltration, thereby increasing flooding. The lack of study on the role of green open space (GOS) in Jakarta’s urban hydrology was identified as a critical factor that discounted the role, and the target of GOS in supporting urban sustainability has not been achieved in Jakarta. The aim of this study was to fill this research gap by analysing the potential of GOS in minimising runoff through optimisation of its function as a storage area for water reserves. Data analysis was done quantitatively using Horton, Thornthwaite–Mather and Ffolliot equations. Results showed that recharge and discharge areas play a critical role in determining optimal water reserve locations, and soil texture is an important indicator that affects runoff. In addition, the proportion of GOS (as indicated by its fulfilment target in urban planning) affected an area’s chances of inundation and flooding. This study concluded that the hydrological function of GOS could be optimised through the sponge city system with GOS and blue open space integration using bioretention.

Not only at the water treatment process, disinfection is required for the inactivation of pathogen microorganisms in wastewater treatment before it is released

The global spread of antibiotic resistance poses a significant threat to public health and is one of the main causes of this problem. Livestock farming plays a significant role in the horizontal and vertical transmission of treatment-resistant genes and bacteria. These processes involve contact with agricultural products and the environment, raising concerns for public health, and farming communities. The farming community is composed of a staggering 608 million farms worldwide, and their livelihood depends heavily on livestock farming. To address this issue, a multidisciplinary One Health approach focusing on integrated monitoring and intervention for humans, animals, and the environment is essential. Water, sanitation, and hygiene (WaSH) programs have the potential to significantly reduce the risk of exposure to antibiotic-resistant bacteria, particularly extended spectrum beta-lactamase (ESBL) Escherichia coli, by obstructing the transmission route between humans and animals. Additional risk reduction measures for ESBL E. coli infection in animals include vaccination and biosecurity program implementation. Water, sanitation, and hygiene and biosecurity measures must be combined to maximize the effectiveness of the One Health program. Therefore, this study aimed to describe recent advances in biosecurity and WaSH interventions in the livestock environment, analyze the effects of these interventions on human and animal health, and investigate potential future scenarios within the quantitative microbial risk assessment framework. This study used an integrative literature review through searches of four databases, a review of World Health Organization documents through websites, and an examination of relevant texts from previously obtained reference lists. Although hygiene and sanitation are often combined, there is still a lack of quantitative evaluation of the efficacy of integrating WaSH with biosecurity in livestock. In addition, the integration of the WaSH program with biosecurity has potential as a One Health intervention in the coming years. Keywords: antibiotic-resistant bacteria, biosecurity, extended-spectrum beta-lactamase Escherichia coli, One Health, scenario, water, sanitation, and hygiene.

The enhancement of the shift in settlement areas in the suburbs of Jakarta is getting out of control. This phenomenon of urban sprawl development has changed the function of open land into built-up land for the construction of new housing infrastructure. This urban sprawl phenomenon will continue along with the escalating number of inhabitants. In addition, the development of residential areas in the outskirts of Jakarta, as happened in the research location in South Jakarta, has social and environmental impacts caused by the high use of groundwater by the community and makes residential areas unsustainable. This paper aims to assess the status of the environment's carrying capacity related to the occurrence of unsustainable settlements and to offer efforts to implement groundwater conservation in residential areas. This study develops a dynamic system model using a feedback approach to obtain the surroundings' carrying capacity status. The feedback approach uses three environmental subsystem models to address sustainable ecological problems: the social-environmental subsystem, the built environment subsystem, and the natural environment subsystem. The variables affecting the simulation system are the community's water needs, land conversion, and groundwater availability. The study's findings indicate that when it begins in 2070, the status of the environmental carrying capacity at the research location will be experiencing a severe water deficit, resulting in groundwater scarcity. Based on the scenario results, several policies can have a positive influence on increasing the status of environmental carrying capacity so that they can assist decision-makers in implementing groundwater conservation policies.

Microplastics are emerging contaminants that degrade from textile plastic products, petroleum, and cosmetic equipment with sizes less than 5 mm. There are more than 70,000 settlements located along the Ciliwung River in DKI Jakarta that use the river water as a source of clean water. The most...

Nuclear medicine (NM) services in Indonesia have rapidly developed due to the increasing number of patients, and this growth has been supported by standardized regulations in the field, including the management of solid waste generated. However, multiple reports indicate that licensing control does not regulate liquid waste disposal from patient excretions to protect personnel and the community from radiopharmaceutical exposure. One of the radiopharmaceuticals commonly used in NM and having the longest half-life among the radiopharmaceuticals used in NM is iodine 131(I-131). Thus, this study used a high-purity germanium detector to measure iodine-131 (I-131) activity in liquid waste from decay tanks, temporary collection channels, the hospital’s wastewater treatment plant (WWTP) outlet, and six points around the NM service and liquid waste treatment unit. Concentration measurements in three decay tanks were carried out sequentially every 12 h for 3 d, corresponding to the therapy period. The results showed that the I-131 activity levels in the decay tanks and temporary collection channels, before being mixed with liquid waste from other units, were 95.9 × 10⁶ ± 4.4 × 10⁶ Bq m^−3. At the point where the liquid waste from other units was mixed, the activity level decreased significantly to 472 680 ± 22 160 Bq m⁻³, which was below the clearance level of 10⁷ Bq m⁻³. However, the recorded concentration exceeded the standard for environmental radioactivity at the hospital’s WWTP outlet, namely 37 670 ± 2040 Bq m⁻³. The measurement results for I-131 in the air in the open space for two nuclear buildings was above the standard at 1.3 ± 0.27 Bq m⁻³. According to the RESRAD simulation, based on the initial dose taken from the liquid waste treatment outlet point, the accumulation of doses and the risk of cancer among workers and the community decreased within 3 months after the maximum exposure.

Water is a key resource needed for human life. Urban water supply has not met the target of fulfilling water rights in terms of quantity, quality, continuity, and affordability. Urban water management system still traditionally emphasizes the physical construction of infrastructure and are still managed fragmented. This research aims to develop the conceptual models of dynamic governance model in urban water governance. The research approach uses a qualitative method by using soft system methodology (SSM) to develop the conceptual model. Research results are the conceptual models of dynamic governance in urban water governance at the policy hierarchy process starting from policy, organizational and operational levels to achieve the goals of sustainable urban water management. The conceptual models are described through the pathways of activities based on the interaction between dynamic capabilities and organizational culture. The dynamic governance model is adapted in Bandung Metropolitan Area as an implementation strategy in the fast-growing urban area.

The Cisadane River, Tangerang City, is one of the most important rivers in Indonesia. This river provides raw water for Municipal Waterworks (PDAM) of the Tangerang City and Soekarno-Hatta International Airport, but the water quality tends to deteriorate due to pollution. The government has made...

Acid mine drainage (AMD) treatment leaves residue in the form of sludge that contains large amounts of metal, silica, ferric, and alum. This research aims to determine the capabilities that AMD sludge-synthesized coagulant has in reducing COD and TSS concentration in domestic wastewater. The domestic wastewater sample used in this research is an artificial domestic wastewater with a COD concentration of 285 mg/l and a TSS concentration of 245.31 mg/l. After going through Acidification process, AMD sludge coagulant contains Si (43.66%), Fe (30.02%), dan Al (12.35%). A jar test is then performed in order to determine the optimal coagulant dosage. In this process, a coagulant dosage of 40 mg/; 60 mg/l; 80 mg/l; 100 mg/l; 140 mg/l; 180 mg/l; and 200 mg/l was used with 100 mg/l being the optimal coagulant dosage. The AMD sludge containing the optimal coagulant dosage of 100 mg/l is found to be able to reduce COD concentration by 34.74% and TSS concentration by 95.63% from the tested domestic wastewater sample. This research can illustrate the vast potential that the AMD sludge has as a coagulant.

Indonesian government built a hazardous waste treatment facility near two villages in Bogor, Indonesia. The facility has been operating since 1994, and its activities affect the neighboring villages. There had been two significant conflicts between the village’s community and the company, in 2006 and 2008. The acceptance of the surrounding neighborhood is one of the major risks affecting a company’s lifetime. This study aims to provide the latest perception of the two villages’ community on the facility’s existence. The survey, observation, and in-depth interviews were employed to gather enough information for perception analysis. The perception analysis represents variables: socio-demography, knowledge and information, health issues, social-economy values, and trust. The survey was conducted to 100 respondents, and the data were analyzed as a Likert scale for each variable. The univariate analysis was performed to map the perception, which resulted in “good perception”. The bivariate analysis was performed to explore the socio-demographic variable’s influence on perception. The result showed that there is no significant correlation between age, education level, and occupations with perception. These results can be used as the base information to determine the company’s sustainability strategy.