All about chemical phosphorus traps

A chemical phosphorus trap is a special pump that doses a precipitation chemical into the wastewater.
It works by reacting with the phosphorus in the sludge separator and binding the phosphorus to the sludge.

Please note that there are no studies or reports on the functioning of simple chemical phosphorus traps. The manufacturer Fann has had their product EkoTreat WiF CE marked and approved with their own biobed.

To succeed in capturing the phosphorus with chemistry, the following is required. The flocculant reacts with water and only seconds later it is ineffective. Since the time is very short, the phosphorus in the toilet water must meet the flocculant within 10 seconds for optimal reduction. For the meeting between the phosphorus and the flocculant to be effective within the active time, movement in the sludge separator is required.

Make sure that the plant is locked up for children as the chemicals are highly corrosive.

You should not compromise on the size of the sludge separator, the hydraulic properties when using chemistry become much more difficult for the sludge separator so you must get a slower flow otherwise there is a great risk of sludge escape. It does not help to have several emptyings but the size should be double the normal.

There are three ways to install chemical phosphorus traps with different pros and cons.

Indoors

Time-controlled dosing according to set number of people in the household no intelligence that senses anything.

– Indoors on the sewer trunk where as much water as possible flows closest to the sludge separator.

– Make sure that the plant is locked up for children as the chemicals are highly corrosive.

– The pipes are often blocked if the chemistry comes in without water, expect to have to clean the pipes against the chemistry, which becomes like tough syrup.

Outdoors in a technical well next to the sludge separator

Time-controlled dosing according to set number of people in the household no intelligence that senses anything.

Can work if you have a large and even load in the household and make sure to adjust the comb pump to the right number of people in the household, must be turned off when leaving home for several days.

– Easy to overdose and thus clog the infiltration.

– The advantage is that there are no clogged pipes indoors and the chemistry is dosed straight into the sludge separator, which means that it can work.

– No dangerous chemicals near children indoors.

– Requires simple digging and electricity at the sludge separator.

Outdoors at the sludge separator with a flow-controlled phosphorus trap

A flow-controlled phosphorus trap that doses the right amount of chemistry depending on water use in the house. You avoid the corrosive chemical canister indoors that is found in simpler solutions. The phosphorus trap is placed between the sludge separator and the infiltration, in addition you get a pump solution from the sludge separator to the bed, which extends the life of the bed and the degree of purification.

To succeed in capturing the phosphorus with chemistry, the following is required. The flocculant reacts with water and only seconds later it is ineffective. Since the time is very short, the phosphorus in the toilet water must meet the flocculant within 10 seconds for optimal reduction. For the meeting between the phosphorus and the flocculant to be effective within the active time, movement is required, which takes place with a return pumping of outgoing sludge-separated water together with the chemistry. No risk of misdosing due to flow controlled pumping. Overdosing can result in sludge escape in the separator which clogs the infiltration. Underdosing results in no reduction of phosphorus. Through customized dosing of flocculants, you get your plant to meet high levels of phosphorus.

There is no need to manually adjust the dosage after changes in the household or when leaving the house for vacation as needed on other simple chemical pump systems. Alarms indicate when it is time to add new chemistry.

Easy to use No adjustment of dosage due to changing number of people in the household or unplugging when leaving home.

Everything is done automatically all the time.

– Proper flow-controlled dosing

– Can handle highly variable loads up to 25 people

– Requires excavation and electricity at the sludge separator.

– Never overdose

– Easy and safe to use

– Installed outdoors, no corrosive chemistry indoors

– Infiltration pump solution for better lifetime and function

The pump well is placed between the sludge separator and the infiltration. The technical well is placed near the pump well, in it there are electrical cabinets, chemical pump and chemical canister to ensure a good environment.

The wastewater flows by gravity to the pump well. All water is pumped out from the pump well and in this way you get the right volume of chemistry to be dosed to the sludge separator. Approximately 10% of the pumped water is returned to the sludge separator to create movement of the water in the sludge separator so that the chemistry can be mixed in effectively.

For advice! Call us 010-490 10 50 or email info@avloppscenter.se

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