Sanitation Systems Research Articles

Desinfecção de esgoto sanitário de uma estação de tratamento municipal: uso da ozonização individual e combinada com radiação UVC-LED

Abstract The systematic articulation of water resources involves the use of technical and management instruments capable of minimizing environmental impacts with optimization of available capital and constitution of sewage treatment plants (STPs) to seek greater efficiency in the removal of contaminants, including microbiological ones, and enhance the quality of the water to be released into the receiving bodies. In systems where tertiary treatment is present, disinfection methods such as chlorination and UV radiation are commonly used as a final polishing of the effluent, and the monitoring of their effectiveness in disinfection is extremely important to avoid unnecessary expenses. Thus, this research sought to analyze the efficiency of disinfection of effluent samples from an STP of the sanitation system in the municipality of Indaial-SC using ozonation methods and the process combined with UVC-light-emitting diode (LED) radiation, on a bench scale, in batches. The determination of treatment efficiency was carried out by quantifying colony-forming units (CFU), and variables such as pH (5, 7, and 9) and application time (10, 20, and 30 min) formed the configuration of the analysis. The optimal disinfection point was reached within 20 min of the process, regardless of the disinfection method. In 10 min time, whenever the combined application was used, it showed improvement in efficiency at all pHs, most notably in alkaline medium. The application of UV radiation through LED is a recent technology and, therefore, has aroused interest in research worldwide.

Application of Sanitation Safety Planning in the Usage of Wastewater for Agriculture in Bangalore Urban District, India.

Due to water scarcity, wastewater is used in agriculture in peri-urban areas. We aimed to assess the hazards associated with wastewater farming and develop an incremental improvement plan for the sanitation system of wastewater use for agriculture using Sanitation Safety Planning (SSP) in Bangalore urban district, India. Interviews and observations were conducted among 100 farmers in the Mugalur Gram Panchayat area. Direct ingestion and ingestion after contact with wastewater due to inadequate hand hygiene are the routes of contact with wastewater. The control measures followed in the community are the cultivation of crops, which do not have direct contact with wastewater, furrow and drip irrigation, and restricted irrigation. Methods to mitigate the hazards are the provision of interval between final irrigation and consumption,washing of produce with freshwater before transportation to market, and hygienic cooking. Occupational hazards and risks associated with wastewater farming can be mitigated through the adoption of locally acceptable preventive measures.

Treatment of domestic effluents using sustainable biofilter methods

The discharge of effluents is a permanent environmental and sanitation concern. Efficient water management must include water treatment and reuse. It is therefore necessary to study treatment systems to improve their performance throughout the entire chain, from drinking water to wastewater or, more specifically, waste effluent. Currently, technologies using bio-filtration processes have proven to be an effective and low-cost method for treating industrial effluents and domestic sewage. In this study, a low-cost domestic sewage treatment system made up of biofilters and pipes was built on a bench model as a means of teaching practical classes, and its efficiency was also studied. The results showed that the equipment can be made from recyclable material and is low-cost, easy to detail technically and easy to handle and operate. The students involved can easily replicate the technology in their communities, thus spreading low-cost sanitation treatment technologies to low-income populations without access to conventional sanitation systems. The parameters pH, turbidity, chlorination, temperature, and electrical conductivity were all at acceptable levels for discharge into receiving bodies and domestic use.

Ecological and sanitary safety of water supply sources of the Kyrgyz Republic

This article addresses the issue of environmental safety as well as the quality of drinking water and wastewater treatment. The problem of supplying clean water and sewage of settlements and cities of the Kyrgyz Republic is raised. Anthropogenic pollution of natural waters. Inadequate wastewater treatment and unsatisfactory condition of sewage treatment plants. This state of affairs in the water supply and sanitation system of the Kyrgyz Republic requires the development and implementation of new advanced technologies for the treatment of natural and waste waters. Also, the results of this article are aimed at the relevance of scientific research in the treatment of natural and wastewater in the Kyrgyz Republic. Creation and development of innovative technologies, optimization of pumps and pumping units in order to save energy, water treatment, wastewater and collector-drainage water treatment, creation of closed water use systems

Analysis of fecal pollution load factor from septic tanks of residential area (study case: Bandung City, Indonesia)

According to the Ministry of Environment and Forestry, 2017, domestic waste is the most significant contributor to pollution sources in the Citarum watershed (62.16%) and Bandung City (94.15%). To overcome the problem, planning for infrastructure development and improvement of the domestic sewage treatment system is necessary. One of the essential characteristic parameters, which is the subject of this study, is the pollutant load factor parameter in the city of Bandung. Compared to sewage pipelines, the domination of domestic wastewater treatment in Bandung is the On-site Sanitation System (OSS) (38.47%), and the most widely used type of OSS is a septic tank. For this reason, thirty fecal sludge samples were taken from two fecal disposal points in Bandung City, and the concentrations of TSS, COD, BOD, and Ammonia were then analyzed. Based on the results of the study, the range of fecal sludge pollutant load factor for TSS in Bandung City is 57.28 g / person/day – 1,064 g / person/day with an average value of 546.39 g / person/day, the range for total COD is 30.06 g / person/day – 294.99 g /person/day with an average of 294.99 g / person/day, the total BOD range is 14.05 g /person/day – 504.97 g / person/day with an average of 175.5 g / person/day, and ammonia range 1.61 g/person/day – 3.11 g/person/day with an average of 2.62 g/person/day. Based on fecal sludge data, the result can be considered a recommendation to re-determine the main domestic wastewater pollution indicator generation. The new suggestions can be used to design an adequate domestic wastewater treatment system, especially in Bandung. The pollutant load factors can also be used to estimate the pollution loading of wastewater generated by present and future populations. It is important in urban growth planning.

ПРОЕКТИРОВАНИЕ СИСТЕМЫ ВОДОСНАБЖЕНИЯ И ВОДООТВЕДЕНИЯ C МИНИМАЛЬНЫМИ КАПИТАЛЬНЫМИ ЗАТРАТАМИ НА ПРИМЕРЕ ТЕПЛОВОЙ ЭЛЕКТРИЧЕСКОЙ СТАНЦИИ

The work is devoted to the design of water supply and sanitation systems for a low-power thermal power plant within the framework of an energy saving policy with minimal capital costs. The purpose of this work was to analyze the station’s needs for water resources, as well as identify sources of water supply with the selection of cost-effective methods of water treatment and recycling. As part of this work, the set goal was achieved through detailed design of the system on the AutoCAD software platform, which made it possible to accurately visualize all elements of the system. The most important and significant result in this work is the calculations and recommendations for optimizing design solutions taking into account economic feasibility. The significance of the results obtained will allow the implementation of these design solutions at mini stations with low power.

Impact of On-Site Sanitation and Siting of Boreholes on Ground Water Quality in Choma Urban: A Case of New Kalundu and Humba Residential Areas.

Groundwater is a climate–resilient source of freshwater for most sub–Sahara African countries and plays a vital role in sustaining improved access to safe water in pursuit of United Nations Sustainable Development Goal 6 – water and sanitation for all by 2030. However, the potential for on-site sanitation to cause major contamination to groundwater has been known for many years, prompting authorities to advise minimum safe distances between boreholes (water sources) and soakaway. This study evaluated the effects of on-site sanitation and borehole placement on the quality of groundwater in residential areas. The study employed an embedded mixed methodology with a descriptive cross-sectional approach. 138 household heads were involved in the study and 15 water samples were collected for microbiological analysis. Data from households was collected using structured questionnaires while upholding all ethical issues. The study found that 85% of households used on-site sanitation systems as their primary means of waste treatment and disposal, while the remaining 15% used other methods like pit latrines. Due to the utility company’s unstable and unreliable supply of water, residents turned to alternative sources of drinking water, such as drilling boreholes and hand-dug wells within and around compounds, using soakaway systems for waste disposal close to the drinking water source. The chi-square tests revealed that the position of the soakaway, as well as the distance between the water sources and the soakaway, have an influence on water quality. The study concluded that establishment of water sources near any pollution source (soakaway) has a negative impact on the quality of groundwater resources. We recommended that local authorities should not permit construction at any plot less than 30 x 30 meters in its dimensions to have both borehole and on-site sanitation system but rather one of the two.

Membrane technology for water reuse in decentralised non-sewered sanitation systems: comparison of pressure driven (reverse osmosis) and thermally driven processes (membrane distillation and pervaporation)

Thermally driven membrane processes provide an alternative method to conventional pressure driven processes to recover high quality water and manage odour from concentrated blackwater, using a low-grade heat source instead of electrical energy.

Inactivation of Escherichia coli in domestic wastewater by modified septic tank treatment

The Sustainable Development Goals (SDGs) targets for the improvement of drinking water, sanitation, and hygiene (WASH) makes the development of wastewater infrastructure in many countries is increasing. In Indonesia, the development of sewer connections remained limited nationally, most households still rely on on-site sanitation systems that mainly use septic tanks technology. Septic tank as watertight containment itself cannot provide the treatment to comply with the effluent standard of domestic wastewater, while a lot of application of septic tank do not follow by suggested technology for further treatment. That makes the need of septic tank improvement as modified septic tank (MST) system. One of parameters removed by MST better is microbial content. This research aims to identify Escherichia coli inactivation in MST, how the process along the treatment impact E. coli concentration and identification the effectiveness of trichloroisocyanuric acid (TCCA) tablet application as disinfectant in E. coli inactivation, and concurrently safe to environment. This research was conducted in laboratory using MST reactor set-up consists of pre-sedimentation chamber, fixed bed anoxic chamber, and MBBR chamber to treat synthetic wastewater. The synthetic wastewater, composed by C6H12O6, NH4Cl, KH2PO4 and E. coli culture is used. With influent E. coli concentration was 108-109, it was reduced to 108 in pre sedimentation chamber, 106-107 in fixed bed anoxic chamber, 105-106 in MBBR chamber and final effluent, all in MPN/100 ml unit. E. coli was inactivated 99.84% along MST process but with relative high concentration to be discharged. Application of TCCA tablet 90% active chlorine with contact time 15 minutes is adequate to inactivate E. coli completely but generates high concentration of chlorine residual.

A comparative study of bottled and tap water in Abbottabad city: Implications for stakeholders

Access to safe drinking water is essential for human health. In Abbottabad, tap and bore water are commonly used, but there has been a recent increase in bottled water consumption. This study aimed to compare tap and bottled water quality in Jinnahabad, Abbottabad. Physicochemical and bacteriological analysis was conducted on water samples collected from various sources. Surveys and interviews were also conducted to assess consumer perceptions and costs. The study found that, on average, bottled water had better physicochemical quality, although both alternatives met WHO limits. Tap water had higher levels of E. coli due to a weak sanitation system. Interestingly, despite perceiving bottled water as safer, most respondents still consumed tap water daily. Shopkeepers reported higher bottled water purchases for travel but lower daily consumption. Tap water was the main source, according to the Cantonment Board Abbottabad, though resources were insufficient. Doctors confirmed tap water-related diseases. The study suggests further research into consumer behavior and recommends monitoring measures, staff evaluations, and penalties to reduce costs and waste.

Water springs: an immeasurable resource for ensuring sustainability.

Water springs are manifestations of groundwater to the surface, forming and ensuring the supply and sustainability of streams, lakes, rivers, and dams. Therefore, its riparian forest is considered an area of permanent preservation, which aims to protect the water, as well as the spring, from consequences of disordered population growth, added to deficient basic sanitation systems, climate change, agricultural activities, inappropriate land uses, unplanned urbanization, and diffuse sources of pollution. In addition to compromising water quality, many of these factors affect the permanence of water upwelling at the source, compromising the formation and continuity of streams, lakes, and rivers. In this context, the objective of the present research was to carry out a bibliographic review on water springs, approaching adjacent themes to the main axis of the study that are fundamental for a deep understanding of their importance for the maintenance of water resources and ensuring biodiversity in the search for the sustainability of life for present and future generations. This research collaborates with the environmental view and shows that the function of a water sources is broader than its concepts can reveal.

Fumitizer: Automated Sanitization System

Fumitizer: Automated Sanitization System

Quaternary prevention in the Cardiovascular Health Program Rational use of complementary exams: A narrative review

The Cardiovascular Health Program (PSCV), founded by the Ministry of Health of Chile (Minsal), is focused on the global cardiovascular risk of people with the purpose of preventing and reducing morbidity, disability and premature death caused by cardiovascular diseases, in congruence with its sanitary aims. Quaternary Prevention is defined as "actions taken to protect individuals from medical interventions that are likely to cause more harm than good". The PSVC's 2017 technical guidelines establish a battery of 11 complementary exams to request upon entering the program, however, neither the scientific evidence that supports them nor the periodicity of their request was mentioned. The aim of this revision is to evaluate the rationality of exams request, based on updated evidence, as a strategy for quaternary prevention and potential economic savings for the sanitary system. A narrative review was conducted through searches on databases, updated clinical guidelines and international recommendations about 11 complementary exams on the follow-up of Type 2 Diabetes and Hypertension. Based on the data analysis, recommendations were made according to the GRADE (Grading of Recommendations Assessment, Development and Evaluation) system. It was concluded that the costs of widely requested complementary exams could be reduced through a more efficient management guided by updated evidence. Our proposal entails changes in some processes and in the evaluation of fulfillment of the PSCV, as well as a deeper cost-effectiveness analysis of the recommendations in order to optimize the management of resources in primary health care.

Multisectoral approach for the control of cholera outbreak - lessons and challenges from Lusaka district - Zambia, October 2023 - February 2024.

on October 18, 2023, the Ministry of Health declared an outbreak of cholera in the Lusaka district. Public health interventions were implemented using a multisectoral approach in the Lusaka district and other hotspots in the country. We documented the multisectoral response efforts and their impacts on the cholera epidemic in the Lusaka district of Zambia. We highlighted the major challenges and their associated impacts on the epidemiologic patterns of disease in hotspot areas. we conducted a descriptive observational study of cholera response activities in the Lusaka district. We used quantitative and qualitative non-participant techniques using the Centers for Disease Prevention and Control's direct in-person observation tool in healthcare settings. We reviewed surveillance records to estimate the magnitude of the outbreak, and characterized cases by person, place, and time. We documented the response interventions and challenges using situation reports. during the 2023 - 2024 cholera outbreak, Lusaka district was the most affected district with 13,122 cases and 498 deaths as of 12th February 2024. Despite having a well-established system for coordinating technical support and resource mobilization, inadequate sanitation and limited access to clean water remained potential risks for cholera outbreaks in Lusaka district. Lusaka district may have experienced one of the most severe cholera epidemics in the nation's history, as indicated by its rapid spread and increased mortality reported from both the community and treatment centers. A multisectoral coordination for improved sanitary systems, access to clean water, health education strategies, and vaccination campaigns contributed to the decline in cholera cases.

Water and war: The effect of functioning chlorinated water stations in reducing waterborne diseases during conflict in northwest Syria, 2017-2021.

Since 2011, Syria has been engulfed in a complex conflict marked by both targeted and indiscriminate attacks on civilians and civilian infrastructure. Water infrastructure has been continuously targeted, exacerbating problems with contamination of and access to clean adequate drinking water, and increasing the risk of waterborne diseases. We aimed to determine whether having access to more functional and chlorinated water stations is associated with a reduced risk of waterborne disease in northwest Syria. We examined the effect of functioning chlorinated water stations on the incidence of waterborne disease in 10 districts of Northwest Syria between January 1, 2017, and June 30, 2021, using weekly reported disease surveillance data and data from a water, sanitation, and hygiene (WASH) system evaluation program of the Assistance Coordination Unit (ACU). We ran eight negative binomial models to examine the association between functioning chlorinated water stations and the incidence of four of the five waterborne diseases: acute bloody diarrhea (ABD), acute other diarrhea (AOD), acute jaundice syndrome (AJS), and severe typhoid fever (STF). Dose-response models were used to investigate how the incidence of disease can theoretically be reduced as functioning and chlorinated water stations strategically increase. Compared to areas with lower quintiles of functioning and chlorinated water stations, the rates of the four waterborne diseases were lower in areas with higher quintiles of functioning and chlorinated water stations. Exposure to functioning water stations had a stronger association with lower rates of waterborne diseases than exposure to chlorinated water stations. Dose-response models demonstrate a potential for curbing the incidence of acute diarrhea and acute jaundice syndrome. The results of this study provide an understanding of the effects of water station functionality and chlorination in conflict settings. These findings support greater prioritization of WASH activities in countries experiencing violence against civilian infrastructure.

Pemilihan Lokasi Prioritas Pelayanan Penyaluran Air Limbah di Kabupaten Cianjur Dengan Metode Skoring dan Pembobotan

The increase in population in Cianjur Regency has begun to be significant. Inadequate urban sanitation systems make people dispose of their domestic waste carelessly into the nearest river or water body resulting in environmental pollution. One way to reduce these problems is to build an adequate domestic wastewater distribution system. The planning of a domestic wastewater distribution system in an area must be accompanied by the selection of the best location to increase the effectiveness of environmental pollution prevention. Priority service areas are selected based on 5 available criteria, namely: Population density, Topography, Clean water distribution network, Sanitation condition, and Slum area. The method of determining priority areas used is the scoring and weighting method. The results obtained are 3 priority zones so that it can be determined which sub-district is the planning area, namely Cianjur District.

Collective responsibility during a cholera outbreak: The case of Hammanskraal

The transmission of cholera, a highly infectious disease, is closely linked to inadequate access to clean water and sanitation facilities, with resource-poor communities, including refugees, rural communities and temporary displacement camps particularly vulnerable to outbreaks. Any disruption in water and sanitation systems or a sudden surge in community size owing to displacement can spark a humanitarian and health crisis, elevating the risk of cholera transmission and possibly triggering a regional epidemic. Recently, Hammanskraal in Gauteng, South Africa, experienced such an epidemic. A multifaceted approach is essential to minimise fatalities and effectively manage healthcare services in such health emergencies. This approach includes early detection, rapid response to contain outbreaks, and the effective deployment of technical support, advocacy, resource mobilisation and partnerships at local, national, and international levels. This paper explores the responsibilities of individuals, healthcare workers, communities and governments in addressing epidemics. It also delves into the concept of collective responsibility with regard to climate change and cholera, as part of the multifaceted approach for cholera prevention and control. While economic development, equal access to safe drinking water, and adequate sanitation are necessary for cholera control, major challenges persist in achieving the fundamental right to a healthy environment in the long term. We also discuss these obstacles and conclude with practical suggestions and recommendations for future cholera prevention.

Rural Sanitation Sustainability Dynamics: Gaining Insight through Participatory and Simulation Modeling.

Improved sanitation provides many benefits to human health and well-being and is integral to achieving Sustainable Development Goal Six. However, many nations, including most of sub-Saharan Africa, are not on track to meeting sanitation targets. Recognizing the inherent complexity of environmental health, we used systems thinking to study sanitation sustainability in Uganda. Our study participants, 37 sanitation actors in three rural districts, were engaged in interviews, group model building workshops, and a survey. The resulting model was parametrized and calibrated using publicly available data and data collected through the Uganda Sanitation for Health Activity. Our simulations revealed slippage from improved sanitation in all study districts, a behavior reflected in real interventions. This implies that systemic changes-changes to the rules and relationships in the system-may be required to improve sanitation outcomes in this context. Adding reinforcing feedback targeting households' perceived value of sanitation yielded promising simulation results. We conclude with the following general recommendations for those designing sanitation policies or interventions: (1) conceptualize sanitation systems in terms of reinforcing and balancing feedback, (2) consider using participatory and simulation modeling to build confidence in these conceptual models, and (3) design many experiments (e.g., simulation scenarios) to test and improve understanding.

Assessing and improving the sanitation services in Kabarto 2 IDP camp using the Smart sanitation approach

Sanitation is a critical issue in internally displaced people (IDP) camps, where the lack of proper infrastructure and services can pose major health and environmental dangers. This paper presents a comprehensive analysis of the sanitation situation in Kabarto 2 IDP Camp in Iraq using the Smart Sanitation Approach comprising of three tools: SFD (Shit Flow Diagram), CSDA (Citywide Sanitation Diagnostic Assessment), and ECAM (Energy and Carbon Assessment for Environmental Management). The results show that the camp's sanitation infrastructure is wholly unsafe, with faecal sludge (FS) not being properly contained, emptied, or treated. The operation of the desludging trucks and the incomplete treatment are the main causes of the sanitation system's greenhouse gas emissions. The paper offers recommendations for enhancing the design and construction of the containment systems and restoring or upgrading the treatment plant. In conclusion, the study suggests improving data collection and monitoring, clear roles and responsibilities for the developing a faecal sludge management policy. The paper also makes suggestions for potential future applications of these tools, including the use of these technologies in more IDP camps or humanitarian settings to produce more data and knowledge about the provision of sanitation services in these settings and promote service improvement in the region.

К вопросу о необходимости корректировки СП 54.13330.2022. «СНИП 31-01-2003. Здания жилые многоквартирные»

The article discusses issues related to the need to adjust the enacted set of rules 53.13330.2022 on energy saving issues. This set of rules specifies the installation of cold and hot water meters, but other proposals for water supply and sanitation systems are not presented. In order to save water, it is recommended in the next edition of set of rules to specify information about the installation of single-lever faucets, thermostatic (with flow control), contactless (above the washbasin) and compact type toilets or with an installation with a double flush system in apartments.