Self-organisation in environmental service delivery is increasingly being promoted as an alternative to centralised service delivery. This article argues that self-organised environmental service delivery must be understood in the context of legal rules, especially environmental legislation. The article’s aim is twofold: first, to understand the changing relationship between the government and citizens in self-organised service delivery, and second, to explore how self-organised environmental service delivery complies with environmental quality requirements stipulated in legislation. The empirical study focuses on wastewater management in Oosterwold, the largest Dutch urban development that experimented with self-organisation. The results show that while individual wastewater management was prioritised and implemented at scale, the applicable legal rules were not adequately considered and integrated. Consequently, the experiment led to a deterioration of water quality. The article concludes that the success or failure of self-organisation in delivering environmental services such as wastewater management critically hinges on ensuring compliance with environmental legislation.
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High population growth, a lack of wastewater treatment plants and poor wastewater management are major challenges in wastewater management in Timor-Leste (East Timor). One of the approaches of the government of Timor-Leste is to separate wastewater into greywater and blackwater from domestic, commercial, residential, and industrial areas. Three methods were applied to obtain insight into the locations and discharge of grey- and blackwater to develop a cost-effective wastewater strategy: a field survey and data collection, interviews with over 130 participants from local authorities and communities, and the open-source mapping of locations of wastewater discharge. This research concluded that 47.7% of the grey wastewater is discharged into open sewers connected directly to the sea. Most communities discharge their wastewater directly due to the absence of wastewater management, policies and regulations, and lack of communities’ understanding of the possible health impacts of wastewater. The impact of poor wastewater management showed that most of the children in these communities have suffered from diarrhea (73.8%), and in the rainy season, there is a high possibility of infection with waterborne diseases. The literature review, field mapping, and interviews show that there is high demand for a cost-effective wastewater strategy for health improvement. Low-cost nature-based solutions such as constructed wetlands and bioswales can be implemented with local skills and materials to improve the wastewater situation and address other challenges such as biodiversity loss, heat stress, drought, and floodings. These installations are easier to rebuild than large-scale grey infrastructure given the multiple hazards that occur in Timor-Leste: landslides, earthquakes, strong wind, and pluvial and fluvial floodings, and they can serve as coastal protection.
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This chaptes proposes a methodology for the section monitoring locations for wastewater quality monitoring, based on (pre-) screening, a quick scan monitoring campaign, and final selection of location and design of the monitoring setup.
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Thermal disinfection is probably the oldest water treatment method ever used. Similarly to other disinfection processes, it targets the inactivation of pathogenic (micro)organisms present in water, wastewater and other media. In this work, a pilot-scale continuous-flow thermal disinfection system was investigated using highly contaminated hospital wastewater as influent without any pre-treatment step for turbidity removal. The results proved that the tested system can be used with influent turbidity as high as 100 NTU and still provide up to log 8 microbial inactivation. Further results have shown energy consumption comparable to other commercially available thermal disinfection systems and relatively low influence on the investigated physical–chemical parameters.
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Climate change and urbanization will increase the frequency and magnitude of urban flooding and water quality problems in many regions of the world. In coastal and delta areas like The Netherlands and the Philippines, where urbanization is often high, there has been an increase in the adoption of sustainable urban drainage systems (SUDS). SUDS are installed around the world with the expectation to reduce urban flooding and reduce the pollution impact on receiving waters. Most cities in Asia are starting to implement SUDS as their strategy to make their cities sustainable and resilient.The combination of SUDS with appropriate wastewater treatment and management systems have the potential to be multifunctional in alleviating flood run-off, improving water quality, alleviating heat stress and as a source for reusing the stormwater and wastewater.Since the earliest SUDS are implemented in Europe decades ago it is advised to use the lessons learnt in this process. International knowledge exchange is promoted in projects as IWASTO where several organisations from the Philippines and The Netherlands join forces on a specific region as the Pateros riverin Manila with the aim to minimise the pollution impact on this receiving water. The first findings of this project related to storm water and wastewater management are presented in this paper. In this stage of the project high level support models that map the challenges in the city (such as flooding and heatstress) arevaluable tools for implementing cost effective sustainable drainage for improving water quality.
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High-pressure anaerobic digestion is an appealing concept since it can upgrade biogas directly within the reactor. However, the decline of pH caused by the dissolution of CO2 is the main barrier that prevents a good operating high-pressure anaerobic digestion process. Therefore, in this study, a high-pressure anaerobic digestion was studied to treat high alkalinity synthetic wastewater, which could not be treated in a normal-pressure anaerobic digester. In the high-pressure reactor, the pH value was 7.5 ~ 7.8, and the CH4 content reached 88% at 11 bar. Unlike its normal-pressure counterpart (2285 mg/L acetic acid), the high-pressure reactor ran steadily (without volatile fatty acids inhibition). Furthermore, the microbial community changed in the high-pressure reactor. Specifically, key microbial guilds (Syntrophus (11.2%), Methanosaeta concilii (50.9%), and Methanobrevibacter (26.8%)) were dominant in the high-pressure reactor at 11 bar, indicating their fundamental roles under high-pressure treating high alkalinity synthetic wastewater.
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Met de toenemende drukte in de stad neemt ook het autogebruik toe. Deze toename zorgt voor extra druk op de veiligheid en gezondheid voor mens en natuur. Om de negatieve impact van verkeer te mitigeren kan gekeken worden naar strengere eisen aan hinder en uitstoot. Met Smooth Traffic Management (STM) wordt gewerkt aan het verminderen van de negatieve verkeerseffecten rond ‘gevoelige locaties’ door bestuurders middels een navigatiesysteem een alternatieve, omgevingsbewuste route aan te bieden.
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Waste disposal management and the energy crisis are important challenges facing most countries. The fruit-processing industry generates daily several tons of wastes, of which the major share comes from banana farms. Anaerobic digestion (AD) technology has been applied to the treatment of wastewater, animal slurry, food waste, and agricultural residues, with the primary goals of energy production and waste elimination. This study examines the effect of organic loading (OL) and cow manure (CM) addition on AD performance when treating banana peel waste (BPW). The maximum daily biogas production rates of banana peels (BPs) with a CM content of 10%, 20%, and 30% at 18 and 22 g of volatile solids (gvs) per liter were 50.20, 48.66, and 62.78 mL·(gvs·d)−1 and 40.49, 29.57, and 46.54 mL·(gvs·d)−1, respectively. However, the daily biogas yield showed no clear interdependence with OL or CM content. In addition, a kinetic analysis using first-order and cone models showed that the kinetic parameters can be influenced by the process parameters.
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The WATERMINING project aims to bring solutions to improve the circularity of water treatment and the resulting by-products of these processes. Achieving a deep understanding of the barriers potentially hindering the development of circular water solutions is crucial to design policies that enable the deployment of these techniques. To do this, the WATERMINING project organizes Communities of Practice (CoPs), where stakeholders from the WATERMINING case study projects analysed these market barriers and proposal (policy) measures to clear these.CoPs in the case studies of Lampedusa in Italy and Almería in Spain focused on sea water desalination. The case studies of Faro-Olhão in Portugal, Larnaca in Cyprus and La Llagosta in Spain have been discussed by CoP stakeholders in terms of barriers in circular urban wastewater treatment. The CoP in the Netherlands focused on circular industrial waste water treatment at the Westlake plant at Rotterdam. The barriers defined by the stakeholders in the CoPs were discussed by the WATERMINING partners at the consortium meeting in Palermo (Italy, September 2022), and presented at the WATERMINING Market and Policy workshop in Brussels (Belgium, February 2023).Addressing the three above-mentioned categories of circular water solutions, common barriers identified across all WATERMINING’s case studies are the following. First, stakeholders report a lack of incentives to implement circular solutions, as mainstream linear practices are generally cheaper.This could be addressed by de-encouraging linear techniques by making the disposal of their byproducts (such as brine) more expensive. Another solution could be to provide added value to circular solutions through the monetization of their additional products and services. Subsidies can support in lowering production costs or prices of materials recovered from sea- and wastewater treatment to level the playing field with conventionaly derived material.Another commonly mentioned barrier is the difficulty to introduce products obtained from circular water treatment in the market, both because of a lack of public acceptance and legal constraints stemming from products being regarded as waste. Information campaigns and the revision of current regulatory frameworks to allow these products entering the market would expand the revenue sources from these techniques and improve the circularity of the system. Standardising the circular water treatment technologies in the market could support this, whereby best available techniques reference documents of the EU (BREFs) could be an effective instrument, especially when tapping into an ongoing BREF writing or updating process.Across the case studies and replication studies it has been mentioned that current legislation in case study countries exclude ‘watermined’ products from food and/or other applications. Criteria for endof-waste status of ‘watermined’ products, which would determine whether a product, such as Kaumera which is produced from urban wastewater treatment, is eligible as a fertiliser in agriculture, are usually determined at the level of the EU, but Member States could interpret these more stringently (Member State-level criteria cannot be weaker than the EU-level ones). In this respect it has been recommended to enhance knowledge exchange across Member States, e.g., by creating anEU-based unit (or competencies within an existing unit) to promote cooperation among EU Member States and regional authorities concerning the production, sale and use of products recovered from wastewater treatment.Another common perception stakeholders report is the widespread conservatism in the water sector. Water treatment actors traditionally have a focus on purifying water and supplying this to the market. Generating products from waste streams is often something that market actors are less familiar with. Among other solutions, the ‘Dutch model’ has been recommended as a way to create national centres for the development of knowledge and technology for water management, which would serve as an R&D accelerator.
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The adaptation of urbanised areas to climate change is currently one of the key challenges in the domain of urban policy. The diversity of environmental determinants requires the formulation of individual plans dedicated to the most significant local issues. This article serves as a methodic proposition for the stage of retrieving data (with the PESTEL and the Delphi method), systemic diagnosis (evaluation of risk and susceptibility), prognosis (goal trees, goal intensity map) and the formulation of urban adaptation plans. The suggested solution complies with the Polish guidelines for establishing adaptation plans. The proposed methodological approach guarantees the participation of various groups of stakeholders in the process of working on urban adaptation plans, which is in accordance with the current tendencies to strengthen the role of public participation in spatial management. https://doi.org/10.12911/22998993/81658
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