Wastewater A Resource for Drinking 2024.pptx

Wastewater Treatment for Drinking

1. WASTEWATER: A Resource for Drinking 18 April 2024

2. Content Introduction Sewerage Condition Sewage Treatment Process Wastewater Reuse for Drinking

3. Metro Manila Population (PSA 2020) : 13,484,462   Estimated Water Demand Projection : 150 lpcd Estimated Sewage Generation : 2,000,000 cmd INTRODUCTION Water Consumption Projection, MLD https://psa.gov.ph/sites/default/files/Crops%20Statistics%20of%20the%20Philippines%202016-2020.pdf https://ro.mwss.gov.ph/business-plans-of-maynilad-services-inc-and-manila-water-company-inc/ Google image

4. Effects of Untreated Wastewater Risk to human health Degradation of Environment particularly receiving water bodies Negative impact to the economy Metro Manila Sewerage Sewerage under the MWSS service coverage through separate sewers currently low. Sewerage coverage is about 16% in the east zone and 8% in the west zone (2020). Most areas in Metro Manila have combined sewer systems, which were used to collect wastewater from houses and from surface runoff. INTRODUCTION The World Bank 2020

5. Provision of wastewater management services was declared a national priority. In 2008, the Philippine Supreme Court passed a decision mandating concerned national government agencies (including MWSS), local government units (LGUs), and other state entities to clean up, rehabilitate, and restore the water quality of Manila Bay to ultimately reach a level that is fit for contact recreation. In compliance with the Supreme Court decision and as part of the obligations under the extension of the concession term, MWCI and MWSI were mandated to achieve 100% wastewater service coverage by 2037.

6. Many of the millions of people living on the lake shores are informal settlers whose homes lack proper sanitation facilities. At least  half a million of them are estimated to be discharging raw sewage into the Laguna Lake. Untreated sewage is another cause of pollution. Highly problematic is also intensive fishing and the large number of fish farms in this region.

7. Untreated wastewater causes pollution to rivers and health problems

8. How do we treat Wastewater?

9. Sewage Treatment Process https://biologyreader.com/activated-sludge-treatment.html#google_vignette

10. DENR Administrative Order No. 2016-08 – Water Quality Guidelines and General Effluent Standards of 2016 and DENR DAO No. 2019-21 Updated WQG and GES for Select Parameters Sewage Treatment Process

11. ANSWER: YES, as long as we treat it and should pass the standard for drinking water. Can We Use Wastewater for DRINKING ?

12. ANSWER: YES, as long as we treat it and should pass the standard for drinking water.

13. INTRODUCTION Wastewater Reuse for Drinking

14. Wastewater Environmentally Sound Technologies (ESTs) Wastewater Reuse Wastewater -Sewage Potable Drinking Water Treatment Process (EST) Philippine National Standards for Drinking Water (DOH AO No. 2017-0010)

15. Treatment Process (EST)

16. Opportunities: In Metro Manila, wastewater could be a potential additional supply for potable drinking water. Reduce negative impact to the environment. Wastewater for Reuse

17. Water Reuse and Recycling https://www.epa.gov/waterreuse

18. Developments of Membrane-Based W astewater R euse Potable Water Reuse through Advanced Membrane Technology Chuyang Y. Tang, Zhe Yang, Hao Guo, Jason J. Wen, Long D. Nghiem, and Emile Cornelissen . 2018.

19. Treatment Process

20. Use of Information Technology The Use of Remote Sensing and GIS Technologies for Comprehensive Wastewater Management Remote sensing technologies and geographic information systems are major tools in order to find suitable environments and decide on action plans for watershed conservation, water supply, and wastewater management. GIS and Remote Sensing integration is one of the most important methods used to apply geo-information in management of hydrological structures

21. Water Treatment Process

22. Benefits provided by reuse projects This section describes the many benefits of water reuse project and links users to case studies that provide project descriptions, information on policy considerations and financial and contractual information.  Reliable Water Supply Climate change is causing more severe droughts. Also, as populations expand, cities and towns need more water to support new homes and businesses. Water reuse can help cities and towns meet these growing water needs - even during droughts - because it creates a sustainable and reliable water supply from water that would be otherwise lost. Water reuse is also often cheaper than constructing new reservoirs or desalinating seawater.

23. Improved Water Quality Pollution can degrade water quality and make surface waters too dirty for recreational, drinking, or wildlife habitat uses. Water reuse collects and treats polluted water so that it can be used again within a community. This practice reduces pollutant discharges, such as nutrients, while increasing the reliability of community water supplies.  Infrastructure Resilience Climate change is  threatening communities with more frequent and intense floods, droughts, and sea level rise. Flooding can overwhelm our sewers; droughts make drinking water scarcer; and sea level rise threatens to mix salty water into our fresh drinking water. Water reuse can help lower the volume of stormwater that flows into city sewers and help cities to secure a water supply that does not depend on the rain.  Water reuse can also be used to create freshwater barriers underground that prevent seawater from contaminating drinking water. 

24. Ecological Restoration Habitat loss threatens wildlife and the ability of ecosystems to freely provide humans with food, clean water, and clean air. Water reuse can help restore ecosystems by providing them with a consistent water source. For example, wetlands can be created near wastewater treatment plants, and reused water can be used to help maintain health streamflow to support aquatic species. In arid regions, such as the desert southwest, treated wastewater and stormwater may be the sole source of water for important habitats. Social Benefits   People highly value greenspace, parks and natural areas because they provide social, cultural and recreational benefits. Water reuse projects can help create new greenspaces in cities through green infrastructure projects, preserving wildlife habitats, and sustaining the stream flow in culturally important water bodies. 

25. Economic Resilience  Water reuse can benefit the local economy of a community by lowering the overall cost of infrastructure over its lifetime. For example, water reuse projects that capture and treat stormwater before infiltrating it into the ground can help prevent sewers from being overwhelmed with too much water. This lowers the cost to clean up sewer overflows and to treat the smaller volume of sewage flowing into the downstream wastewater treatment plant. Water reuse investments can also create new kinds of green jobs in the public and private sector and lower the cost of finding, buying, and transporting conventional water supplies from further away.      Critical Water Access  Due to their remoteness and small size, rural and underserved communities may lack access to adequate or reliable water and wastewater treatment services.   Water reuse can be an way to improve water supplies or sanitation. Onsite water reuse is especially attractive in areas where it is impractical to build large, centralized treatment plants. 

26. Water Reuse in the Philippines Maynilad’s “New Water” project is one of the innovative solutions being implemented to meet the increasing demand for a continuous and affordable supply of clean drinking water in the West Concession Area. The treatment plant yields 10 million liters of New Water per day. https://ro.mwss.gov.ph/mwss-ro-congratulates-maynilad-for-winning-the-2023-global-water-awards-water-reuse-project-of-the-year/ https://globalwaterawards.com/2023-water-reuse-project-of-the-year/

27. Water Reuse in the Philippines - Parañaque New Water Plant, Philippines Raw Sewage Sewage Treatment Plant (STP) Compliant to DENR Standards Ambient Water and General Effluent Standards of 2021 Modular Treatment Plant ( ModTP ) Pressurized Media Filtration, Ultrafiltration, Reverse Osmosis, and Chlorine Disinfection Compliant to Philippine National Standard for Drinking Water Treat Used Water https://power4all.org/articles/news/maynilads-new-water-2