SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Mon, 24 Apr 2017 01:34:29 +0000 Kunena 1.6 http://forum.susana.org/components/com_kunena/template/default/images/icons/rss.png SuSanA - Forum http://forum.susana.org/ en-gb Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: guilherme http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21284 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21284
The vermifilter I mentioned was built using 1m (diameter) concrete rings. They consist of 2 rings of 0,5m high put one on top of the other, totalling 1m as well. This was my first vermifilter and I thought, based on the studies I had read by then, that it´d be better to get the effluent applied to an area that would be larger than the plastic tanks I had found so far, but not wide enough to create preferential flows since the effluent comes in from a 100m pipe, straight from the toilet + shower.

As I mentioned to Dave, my original plan was to have it receiving blackwater only, a load varying from 5 PE to 20 PE (person equivalent). It now receives usually 1 PE on a day to day basis, and up to 20 in single events. It has already received the volume of up to 20 showers/day in events, whereas today it´s not more than 8/10, as we have been able to build a separate installation for additional showers, which have helped to reduce the load.

Good work out there, best from Brazil!]]>
Vermifilters (or vermi-digesters) for wastewater treatment Wed, 19 Apr 2017 18:39:24 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: guilherme http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21283 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21283
The idea is to really separate black and greywater, and direct greywater straight to the constructed wetlands (a floating wetland with emergent species over a bamboo rack, btw), but this involves a future refurbishment that was not possible to happen, as of yet. In other words, this is a temporary solution.

Best to you all, and thanks for your work and attention!]]>
Vermifilters (or vermi-digesters) for wastewater treatment Wed, 19 Apr 2017 18:10:38 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: goeco http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21278 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21278 keep in mind the primary reactor will be dosed every time you flush, which if stacked would then dose the secondary reactor below. Why would you dose the secondary reactor? Be careful of using sprinkler nozzles, the bacterial slime will block them up. I see dosing as only essential at the outlet where you'd dose surface irrigation drippers.

I reckon the worms should squeeze through the gaps in your shadecloth ...if they ran out of food on one side they might have to slim down a bit before they can get through!

Yes, I have a 230 litre drum-sized vermifilter specifically for my kitchen water. It was going for a few months before I added the worms. The solids and grease built up on the surface of the media (I was shoving anything I could fit down the plughole) so the liquid was then draining through the shadecloth sides, which also got clogged with grease, impeding drainage and making a pool. Once the worms were added they soon dealt with the buildup of solids on the surface and drainage was effective again. The grease condenses on the first surface it finds and in my case almost sealed the filter! Definitely wider filters are always more reliable.

Guilherme, I wonder if you would have better effluent quality if you piped the shower water straight to your wetland rather than through your primary vermifilter? Or set up a dedicated vermifilter for all the greywater that discharges to the wetland? They are so easy and cheap to construct, I'd need convincing that it is a good idea to put shower water through a poo vermi-digester...

cheers
Dean]]>
Vermifilters (or vermi-digesters) for wastewater treatment Wed, 19 Apr 2017 07:41:25 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: BPopov http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21270 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21270


Stacking the secondary treatment crate directly under primary one sounds interesting however I would go for some kind timer operated dosing sprinkler for the secondary filter and put respectively accumulating pump/syphon tank before it.
What I would think also about is to have a separate small volume basket primary filter for kitchen sink filled with wood shavings to get rid of the grease and soapy cleaners (an aerobic grease trap). They are quite effective even without worms.

Regards
Bo]]>
Vermifilters (or vermi-digesters) for wastewater treatment Tue, 18 Apr 2017 13:14:42 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: BPopov http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21258 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21258

Could you please , share what is volume of your primary vermifilter and what was approximate waste water load on it per day including grey water from the shower?

Regards,
Bogdan]]>
Vermifilters (or vermi-digesters) for wastewater treatment Mon, 17 Apr 2017 18:13:03 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: guilherme http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21257 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21257
You can see its overall aspect on the image below. Looks great and no fowl odor at all.

I haven´t had a chance to do lab tests on this one as of yet, but as soon as I do I´ll let you know.]]>
Vermifilters (or vermi-digesters) for wastewater treatment Mon, 17 Apr 2017 14:30:53 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: goeco http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21256 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21256 from memory they are 1m x 1.2m and about 900 high, about a cubic metre of capacity.
I tend to pipe greywater directly to the secondary reactor because the purpose of the primary digester in my design is to filter out and digest solids, not purify the wastewater. Thus kitchen greywater could go through the primary digester to remove any solids, but bathroom/laundry greywater gushing over poo might actually pick up fine solids? Piping laundry/bathroom greywater directly to the secondary filter for purification along with primary-treated blackwater makes more sense to me. I'm sure I could put all my wastewater through the primary treatment vermifilter though and welcome anybody trying out alternatives then sharing the results from these... this is an evolving technology!

cheers
Dean]]>
Vermifilters (or vermi-digesters) for wastewater treatment Mon, 17 Apr 2017 09:46:38 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: BPopov http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21253 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21253 for the primary filter? I have used them as composters and then they can be used directly as grow boxes.

What about mixed flow (grey+black)? Do you think it's possibly to use vermifilter in this case? Maybe it should be some kind of middle way system with more volume ot top but still deep enough with recirculation.?

Regards
Bogdan]]>
Vermifilters (or vermi-digesters) for wastewater treatment Mon, 17 Apr 2017 07:31:31 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: goeco http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21252 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21252 Vermifilters (or vermi-digesters) for wastewater treatment Mon, 17 Apr 2017 07:15:29 +0000 Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: JKMakowka http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21251 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21251 Vermifilters (or vermi-digesters) for wastewater treatment Mon, 17 Apr 2017 06:45:30 +0000 Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: goeco http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21250 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21250 Okay, now to the primary treatment vermifilter. Here is a diagram of a twin chamber digester:



You will see that the two baskets are contained within the one chamber. The worms can migrate from one basket to the other depending on where the best food source is. This allows you rotate the influent from one basket to the other and to dig out humus from the rested basket without fresh poo deposit in the way (say every 5 years).

I use plastic fruit crates for baskets:



They are the right size, durable and hold the weight of 5 years of accumulated solids. They allow air flow below and through the sides. Two of these sit side by side against each other on a concrete sump. The walls/roof are screwed to the crates with a cavity for ventilation. Inside the basket is lined with shadecloth and a 20-30cm layer of coarse bark is provided for the worm refuge.

Now, the other thing is that if you have the fall to design a passive (gravity) system you can stack the crates for primary (top) and secondary treatment (directly below). Greywater and recircultion can go to the secondary crate, which is almost filled with media.

cheers
Dean]]>
Vermifilters (or vermi-digesters) for wastewater treatment Mon, 17 Apr 2017 00:36:10 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: BPopov http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21249 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21249
As far as I understood you shared the secondary treatment vermifilter arrangement. What about the primary vermifilter for black water? Could it also be a basket filled all the way down with wood chips but wider ? In the tiger toilet article that you shared before the layering is quite elaborating consisting of diffrent granular material as well as charcoal.
Also as far I understood you system is of batch type with one chamber resting and one active. What is happenning in the resting chamber when worms eat completely the nutrients? Also is there danger that resting chamber go dry?

Regards
Bogdan]]>
Vermifilters (or vermi-digesters) for wastewater treatment Sun, 16 Apr 2017 18:49:39 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: goeco http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21248 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21248 the basket is cylindrical (my photo might have been misleading) and all the way to the bottom. There is an outlet at the bottom of the drum.

cheers
Dean]]>
Vermifilters (or vermi-digesters) for wastewater treatment Sun, 16 Apr 2017 00:41:08 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: BPopov http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21246 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21246
Thank you ! The basket idea is great! So this means in the bottom there is even bigger air gap between the drum walls and busket. How do you drain the water from the drum then? A pipe outlet in the drum wall near the bottom?
Is conical basket shape essential? What if the basket will be more or less cylindrical following the shape of the drum? Wouldn't we get more substrate volume this way (and worms population) and therefore more water treated?]]>
Vermifilters (or vermi-digesters) for wastewater treatment Sat, 15 Apr 2017 16:12:54 +0000
Re: Vermi-Trickling Filters for Sewage Treatment (looking for help to design) - by: goeco http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21244 http://forum.susana.org/component/kunena/205-vermifilters-or-vermi-digesters-for-wastewater-treatment/20372-vermi-trickling-filters-or-vermifilters-for-sewage-treatment-looking-for-help-to-design?limit=12&start=36#21244 I wanted to ask you about the profile of your vermifilter.
We probably should be discussing primary treatment and secondary treatment vermifilters separately. In a secondary treatment vermifilter you don't need much space above the media because solids don't really build up over time. This is because only liquid circulates through the secondary treatment module. Depth of media is also important.

On the other hand, primary treatment vermifilters need lots of space above for buildup of solids, they should be wide to allow the solids to spread out rather than build up, and they don't require much depth of media.



Media basket using plastic mesh, shadecloth, polythene pipe and plastic cable ties




Basket installed in 250 litre plastic drum



Coarse pine bark media installed in basket

Because there is air surrounding the media there is no need for a coarser drainage layer at the bottom. I do use a free draining media that doesn't impede percolation and air penetration into the media though. If you use a fine media such as peat or sawdust, you might need a coarse gravel drainage layer at the bottom. Keep in mind that using a basket means that impeded drainage doesn't result in over-saturation/flooding. You can't drown the worms this way and the environment always remains aerobic. Also note that I drill lots of fine holes in the drum to allow ventilation (but not flies). In your case you'd have insulation and a ventilation system to ensure the reactor doesn't freeze.

cheers
Dean]]>
Vermifilters (or vermi-digesters) for wastewater treatment Sat, 15 Apr 2017 07:37:42 +0000