SuSanA - Forum Kunena Site Syndication Wed, 27 Jul 2016 01:11:36 +0000 Kunena 1.6 SuSanA - Forum en-gb Re: UASB Design for Industrial wastewater treatment - by: muench
Your post didn't get a response yet but I just wanted to confirm that yes, this forum is indeed the right place to discuss industrial wastewater treatment, too. We have not yet often talked about it on the forum but that can and should change.

About UASBs for domestic wastewater treatment, perhaps you find something useful in this thread:

Also, I see that you're based on Florianopolis, Brazil. You should meet up with Christoph Platzer (from Rotaria) who lives in the same town if I am not mistaken - or perhaps you know him already. Christoph has also been an active contributor to this forum in the past.

Anaerobic treatment systems (DEWATS, UASBs, ABRs, biogas sanitation systems) Thu, 29 Oct 2015 09:29:40 +0000
UASB Design for Industrial wastewater treatment (looking for good references) - by: ivarurdalen
I am looking for good references in terms of the design of UASB reactors for high strength industrial wastewater (dairy, slaughterhouse, poultry, etc.)

Currently I am using:
- Biological wastewater treatment in warm climates, Von Sperling (More for domestic wastewater)
- Handbook of biological wastewater treatment, Van Haandel
- Biological Wastewater Treatment: Principles, Modelling and Design
- Papers from Lettinga, Netherlands.
- Different scientific articles.]]>
Anaerobic treatment systems (DEWATS, UASBs, ABRs, biogas sanitation systems) Tue, 15 Sep 2015 08:22:51 +0000
Re: Are there any issues with anaerobic digestion of faecal sludge? - by: vishwanathdalvi
Thank you for your reply. It is helpful to know that some urine entering the digestor is ok. It was especially important to know that the effluent of the anaerobic digestor is not strictly safe for environmental disposal.

We have had a look at Flycatcher's digestor. They claim to get good rates for kitchen wastes: something like 2 kg/day of waste treated in a 250 litre vessel. Their effluent is a low viscosity liquid that does not have a repulsive odour: which can be used as fertilizer for flower beds. This unit seems good for treating the fecal matter of a family of 5 (assuming 250 gms/day of fecal matter produced per person).

We are developing a unit that uses air to flush. The fecal matter is sequestered from the environment by allowing it to sink through a bed of particles and is removed from the bottom. The problem was what to do with this fecal matter and how to recover the particles that are lost with the fecal matter.

The anaerobic digestor seems to address both problems. By dumping the fecal+particle mix into the digestor, the particles (which are hydrophobic and lighter than water) will separate from the fecal matter: which will degrade. The particles can be collected from the overflow of the digestor and dried (basically to destroy the liquid bridges that make them clump) and recycled to the "flush" system.

A readily apparent problem with Flycatcher's systems are that the digestor gets upset without warning. Once it is down, it needs something like 30 litres of inoculum to get going again.

Another problem is what happens if there is a sudden spike in toilet use (guests coming to stay) or a drop (family goes on vacation). Anaerobic systems go belly up in such cases. Is there a solution?

Could an aerobic system be preferred in this case: we will forego the methane in exchange for reliability?

Really appreciate your inputs.

Anaerobic treatment systems (DEWATS, UASBs, ABRs, biogas sanitation systems) Sun, 16 Aug 2015 14:07:18 +0000