Cookie tracking notice
Are we allowed to crumble with cookies and anonymous tracking?

We use cookies on our website. Some of them are essential for the operation of the site (so called session cookies), while others help us to improve this site and the user experience (tracking cookies). We use the application Matomo and the external service etracker to analyze your behavior on our website anonymously. Because we value your privacy, we are here with asking your permission to use the following technologies. You can change your settings any time via this link or the menu item in footer menu. For more information visit our Data Policy

Synapse Dewatering Investigation Report - Omni-Ingestor Phase 2, Milestone 1

Frederick, R., Gurski, T. (2012)

Published in: 2012

Publisher:
Consultancy report by Synapse (USA) commissioned by Bill & Melinda Gates Foundation, Seattle, USA

Author:
Frederick, R., Gurski, T.

Uploaded by:
SuSanA secretariat

Partner profile:
common upload


11390 Views
152 Downloads

Content - Summary

This document explores various available dewatering technologies, and analyzes their applicability for separating the liquid and solid components of septic holding tanks. The purpose of this exercise is to identify ways to reduce the quantity of solid materials that must be transported away after desludging a pit or septic tank, presuming the produced water could be easily treated and safely reused or discharged on site or nearby. The technologies reviewed are discussed for their applicability to a specific project concept; reviews do not address more general applicability. For others with dewatering needs, however, this review may provide some directional guidance.

This report was created as part of the development effort for the Omni-Ingestor: a modular equipment set designed to extract and process fecal sludge from pit latrines and septic tanks. This work is being performed under a contract with the Bill and Melinda Gates Foundation’s Water, Sanitation, and Hygeine department. Its purpose is to explore available dewatering technologies, and analyze their applicability towards the Omni-Ingestor design. Its intention is neither to promote, nor to discredit, any specific vendor, technology, or manufacturer.

One of the critical capabilities of the Omni-Ingestor is the ability to separate the liquid and solid components of septic holding tanks to reduce the quantity of material that must be transported away. The system in the Omni-Ingestor must meet several requirements, as outlined in the “Ejected Material Guidelines D5.pdf” document.1 To summarize, the requirements are:
• Input liquid septage will be between 0% and 5% solids.
• Output liquid after separation and dewatering must have:
o Less than 20mg/l TSS
o Less than 20mg/l BOD
o Less than 50mg/l COD
o Turbidity less than 200 NTU
o pH between 6.0 and 9.0
• Output solids after dewatering must have:
o All free water be removed (TS value of 12%-15%)
- The target TS will be 25%
- Higher TS values are permitted but the cost of the additional performance will need to be relatively low.
• The benefits of the system must be economically justifiable.

The system(s) Synapse recommends pursuing meet or come close to meeting these targets. In cases where they do not meet the target requirements, Synapse holds the position that increasing the performance to meet the requirements is either possible through a redesign of the system, reducing system cost via mass production and DFM, or is not practical and would result in a substantial increase in system cost.

Bibliographic information

Frederick, R., Gurski, T. (2012). Synapse Dewatering Investigation Report - Omni-Ingestor Phase 2, Milestone 1. Consultancy report by Synapse (USA) commissioned by Bill & Melinda Gates Foundation, Seattle, USA

Filter tags

English Faecal sludge treatment processes Fundamental research and engineering North America

Download

Synapse Dewatering Investigation Report

Format: pdf file
Size: 1.95 MB

Share this page on    


Follow us on    

SuSanA Partners  currently 400 partners

Networks Circle

 

Latest SuSanA Blog Articles

SuSanA Blog »

SuSanA newsletter

Stay informed about the activities of SuSanA and its partners. The SuSanA newsletter is sent out around four times per year. It contains information about news, events, new partners, projects, discussions and publications of the SuSanA network.

Subscribe to newsletter »

 


close  

 

Resources and publications

Our library has more than 3,000 publications, factsheets, presentations, drawings etc. from many different organisations. It continues to grow thanks to the contributions from our partners.

Add item to library »

The three links below take you to special groups of items in the library for more convenient access:

Projects

The project database contains nearly 400 sanitation projects of many different organizations dealing with research, implementation, advocacy, capacity development etc. Advanced filtering functions and a global map are also available. Information on how and why this database was created is here.

People working for SuSanA partners can add their own projects through their partner profile page. You might need your SuSanA login upgraded for this purpose. Please contact us if you would like to add a project.


Trainings, conference and events materials

Missed important conferences or courses? Catch up by using their materials for self study. These materials have been kindly provided by SuSanA partners.

Shit flow diagrams, excreta flow diagrams (293 SFDs worldwide)

Shit flow diagrams (SFDs) help to visualize excreta management in urban settings. Access SFDs and more through the SFD Portal.

Emersan eCompendium

Humanitarian Sanitation Hub

Sanitation Workers Knowledge and Learning Hub

 


close  

 

Discussion forum

Share knowledge, exchange experiences, discuss challenges, make announcements, ask questions and more. Hint: Your discussion forum login is the same as your SuSanA login. More about the forum's philosophy »


Integrated content

We are hosting content from some other communities of practice and information-sharing portals. This section also provides a link to SuSanA's Sanitation Wikipedia initiative.

Suggest content to add »

SuSanA partners

Not yet a SuSanA partner? Show your organisation's support to SuSanA's vision and engage in  knowledge sharing by becoming partners.

Apply to become a partner »


Individual membership

Register as an individual member of SuSanA free of charge. As a member you can interact with thousands of sanitation enthusiasts on the discussion forum.  You can also get engaged in one of our 13 working groups and our regional chapters. Our FAQs explain the benefits further.

By getting a SuSanA login you can fully participate in the SuSanA community!

Register as a member

Login


Forgot your password?
Forgot your username?

 


close