Category Archives: Wastewater Management

Simple wastewater treatment system could boost aquaculture

Simple wastewater treatment system could boost aquaculture. Fish Information & Services, March 9, 2017.

woodchip bioreactors

Woodchip bioreactors. (Photo: College of Agricultural, Consumer and Environmental Sciences)

New research shows that a simple, organic system using woodchip bioreactors can be helpful for cleaning aquaculture wastewater effectively and inexpensively.

Fish farming creates waste that can be difficult and costly to clean up, an issue that impedes the growth of the industry in the United States.

The researchers participating in the study built bioreactors filled with wood chips to treat wastewater from a fully operational recirculating aquaculture system in West Virginia.

These scientists explain that water from the fish tank enters the bioreactor at one end, flows through the wood chips, and exits through a pipe at the other end. Along the way, solids settle out and bacteria housed in the wood chips remove nitrogen, a regulated pollutant.

To carry out the research, the team set up four identical bioreactors, varying only in retention time, or the amount of time it takes for water to travel from end to end.

Laura Christianson, assistant professor of water quality at the University of Illinois and lead author of the study pointed out that the bioreactors worked as a filter for the solids and took nitrates out and clarified that for systems that need to move a lot of water in a short amount of time, her recommendation is an additional microscreen filter to settle some of the solids out before they enter and clog up the bioreactor.

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This Device by Filipino Electronics Engineering Students Generates Electricity Out of Wastewater

This Device by Filipino Electronics Engineering Students Generates Electricity Out of Wastewater. GineersNow, March 13, 2017.

When John Paul Santos noticed the wastewater in the Pasig River which is near to his school the Polytechnic University of the Philippines, he had a thought of using such water to generate electricity. It was a wild idea then. gineers

But being in his second year as an electronics engineering student, he knew he had to do something about it. Eventually he did.

Together with fellow electronics engineering student Christian Sta. Romana, he developed a device called Electrifilter, or electricity generation from filthy water, which does exactly what is called. It can produce electricity from filthy water which first samples were from the Pasig River.

Read the complete article.

 

Scientists harness sunlight to break down wastewater in 20 minutes

Scientists harness sunlight to break down wastewater in 20 minutes. WaterWorld, March 14, 2017.

CANBERRA, Australia – Chemists in Australia claim to have found an alternative to ultraviolet (UV) light disinfection technologies which they claim is 15 times more efficient.
The research group from Australian National University (ANU) have developed a system that uses modified titanium dioxide as a photocatalyst that works with sunlight.

Research group leader Professor Yun Liu said the photocatalyst can completely decompose organic pollutants in wastewater in 20 minutes.

The team added nitrogen and niobium ions in pairs into the titanium dioxide to improve its performance as a photocatalyst.

ANU conducted the research in collaboration with the Chinese Academy of Sciences, the University of New South Wales, Western Sydney University, and the Australian Nuclear Science and Technology Organisation.

The university has filed a provisional patent covering the discovery, which involved the design strategy, chemical composition and manufacturing approach.

ANU said the new technology could be “useful for treating water for human consumption and has potential applications in making self-cleaning building materials, including glass, and splitting water to make hydrogen fuel”.

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Ushering a new era in sanitation value chain management in India

Report of a WASH Dialogue on faecal sludge and septage management.

By Anupama Sahay

Cambodia faecal sudge management-crop

Faecal sludge management in Cambodia. Photo: Dany Dourng

Is Faecal Sludge and Septage Management (FSSM) an effective and long-term solution in the sanitation value chain? That was the question that Indian sanitation experts reflected on in Jaipur, the state capital of Rajasthan, at a multi-stakeholder dialogue on ‘FSSM Matters: Looking Forward’ on 10 January 2017. The dialogue was the second of the “Insights” series launched last year by the India Sanitation Coalition (ISC), IRC and TARU Leading Edge.

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33rd AGUASAN Workshop: “Circular economy – transforming waste into resources”

The 2017 AGUASAcircular-economyN Workshop will focus on analysing successful and failed approaches for transitioning from linear to circular water and sanitation models.

The workshop takes place from June 26 to 30, 2017 in Spiez, Switzerland.

Circular economy has great potential to drive the Water and Sanitation 2030 Agenda forward because it aligns directly with the Sustainable Development Goal (SDG) 6.3 of improving water quality and substantially increasing recycling and safe reuse globally and SDG 6.4 of substantially increasing water-use efficiency across all sectors and ensuring sustainable withdrawals.

Key questions and issues: 

  • What does the circular economy concept entail?
  • Which flows are relevant?
  • Which stakeholders need to be involved and how?
  • How can demand for recovered products be created?
  • In which context do these stakeholders act?
  • What are the drivers and barriers influencing the transition towards a circular economy?
  • Which circular economy approaches can we learn from for overcoming the identified
  • How should change from linear to circular water and sanitation be managed?
  • How can health risks be managed?
  • How to address public perceptions associated with recycling and reusing of human waste?

Please find the invitation letter, announcement and pre-registration on the website: www.aguasan.ch. Registrations will be accepted until March 19th, 2017.

AGUASAN is an interdisciplinary Swiss Community of Practice (CoP) that brings together a broad range of specialists to promote wider and deeper understanding of key water and sanitation management issues in developing and transition countries. It builds on committed sector professionals from various specialised institutions involved in Swiss development cooperation, humanitarian aid and research. Since 1984, the CoP provides an exemplary, vibrant and most pertinent exchange platform and think-tank serving the water sector, and constitutes an essential link in the innovation and knowledge management strategy of the Swiss Agency for Development and Cooperation (SDC). Besides convening quarterly knowledge sharing events, every year members of the CoP organise an international AGUASAN Workshop in Switzerland

 

Information on fecal sludge management

4th International Faecal Sludge Management Conference (FSM4), February 19-23, Chennai, India. FSM4 will focus on innovative and practical solutions that can be scaled up, including three tracks: research, case studies, and industry and exhibition.

Sanitation Service Delivery (SSD) Program – Ghana, Ivory Coast and BeninSustainable Sanitation Alliance, November 2016. SSD is a USAID/West Africa urban sanitation project implemented in Cote d’Ivoire, Benin, and Ghana. The project aims to improve sanitation outcomes through developing and testing scalable, market-based models that contribute to structural change within the region’s sanitation sector. Several posts to this forum discuss the SSD program and provide links to SSD’s reports and webinars.

Fecal Sludge Management ToolsThe World Bank, June 2016. The World Bank has developed some tools to diagnose fecal sludge management (FSM) status and to guide decisionmaking. These tools do not provide predefined solutions, as the many variables and stakeholders involved demand interventions that are specific to each city and should be seen within the context of integrated urban water management.

Faecal Waste Flow CalculatorIRC WASH, 2016. The tool is developed to determine fecal waste volumes along the entire service chain, allowing city planners, service authorities, or any other users to determine where the biggest losses are and where interventions should be targeted. Less easily quantifiable issues such as the existence of policies and legislation, availability and transparency of plans and budgets, and presence and adherence to environmental and safety standards are captured with the use of score cards.

Fecal Sludge Management in MadagascarWASHplus, March 2016. This video discusses how USAID’s WASHplus project engaged the international NGO Practica to design and pilot a private-sector service delivery model to sustainably manage fecal sludge generated in the peri-urban area of Ambositra using low-cost decentralized technologies.

2016 WEDC Conference Presentations on Fecal Sludge ManagementSanitation Updates, August 2016. This post has links to each of the eight WEDC 2016 conference presentations on fecal sludge management, topics include analysis of fecal sludge collection efficiency and overcoming capacity gaps in fecal sludge management through education and training.

Smaller is Better when Investing in Fecal Sludge Management in AsiaAsian Development Blog, August 2016. This article discusses small wastewater projects that differ from the bank’s traditional approach of focusing on developing bigger centralized systems that involve large, extensive wastewater networks and infrastructure.

Is There Fecal Sludge on Your Salad? IWA Network, January 2017. This article discusses the Sanitation Safety Planning tool that helps optimize the reuse of wastewater, grey water, and excreta.

SFD toolboxSustainable Sanitation Alliance, January 2017. An excreta flow diagram (also often described as shit flow diagram, SFD) is a tool to readily understand and communicate visualizing how excreta physically flows through a city or town.

Assessing Public Health Risks from Unsafe Fecal Sludge Management in Poor Urban Neighborhoods: What Does SaniPath Tell Us about Exposure to Fecal Contamination in 12 Neighborhoods in 3 Cities? Sanipath, August 2016. This presentation compares the latest results of the SaniPath Study from three different study sites: Accra, Ghana; Vellore, India; and Maputo, Mozambique, and discusses the reliability of the SaniPath Tool data.

USAID – Infographic: Tackling Water Scarcity and Sanitation Challenges Across the Middle East

Infographic: Tackling Water Scarcity and Sanitation Challenges Across the Middle East, December 15, 2016. USAID. MENA_Water_infographic-V3.png

The American people, through USAID, have been investing in the water sector across the Middle East to improve access to clean water, reduce water losses, facilitate sustainable use of limited resources and improve access to sanitation.

Egypt
2.2 Million People – Since 2008, USAID invested in water systems and wastewater treatment plants, helping 2.2 million people gain access to clean water and sanitation.

850 Kilometers of Water Pipelines – Since 2012, USAID funded construction of 850+ kilometers of pipelines that serve 1.8+ million people in rural areas –many of whom received access to drinking water and sanitation for the first time.

Capacity Building – USAID supported billing and operation systems to strengthen and build the capacity of institutions.

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