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ISO 4789:2023PublishedGuidelines for wastewater treatment and reuse in thermal power plantsISO 5667-15:2026PublishedWater quality — Sampling — Part 15: Preservation and handling of samples of sludge, sediment and suspended matterISO 8228:2026PublishedEcotoxicological evaluation and classification of sludge for land applicationISO 12370:2025PublishedGuidelines for treatment and reuse of fermentation-based pharmaceutical wastewaterISO 13610:2025PublishedSludge recovery, recycling, treatment and disposal — Determination of calorific value of sludgeISO 19388:2023PublishedSludge recovery, recycling, treatment and disposal — Requirements and recommendations for the operation of anaerobic digestion facilitiesISO 19654:2025PublishedSludge recovery, recycling, treatment and disposal — Laboratory chemical conditioning procedureISO 19658:2025PublishedSludge recovery, recycling, treatment and disposal — Protocol for validating methods for physical properties of sludgesISO 19698:2020PublishedSludge recovery, recycling, treatment and disposal — Beneficial use of biosolids — Land applicationISO/TR 20736:2021PublishedSludge recovery, recycling, treatment and disposal — Guidance on thermal treatment of sludgeISO 22447:2019PublishedIndustrial wastewater classificationISO/TR 22707:2023PublishedSludge recovery, recycling, treatment and disposal — Information on the processes and technologies for inorganic substance and nutrient recoveryISO 23043:2021PublishedEvaluation methods for industrial wastewater treatment reuse processesISO 23044:2020PublishedGuidelines for softening and desalination of industrial wastewater for reuseISO 23882:2026PublishedSludge recovery, recycling, treatment and disposal — Beneficial use of biosolids land application — Guidelines for risk communication and management of public perceptionISO 24521:2025PublishedDrinking water, wastewater and stormwater systems and services — Management of on-site domestic wastewater servicesISO 24566-4:2025PublishedDrinking water, wastewater and stormwater systems and services — Adaptation of water services to climate change impacts — Part 4: Wastewater servicesISO 31800:2020PublishedFaecal sludge treatment units — Energy independent, prefabricated, community-scale, resource recovery units — Safety and performance requirementsISO 54321:2020PublishedSoil, treated biowaste, sludge and waste — Digestion of aqua regia soluble fractions of elementsIWA 28:2018WithdrawnFaecal sludge treatment units — Energy independent, prefabricated, community-scale resource-recovery units — Safety and performance