6333-1
OXYMOP wastewater treatment plant with 161-490 EH rotary screen

OXYMOP are compact activated sludge treatment units, developed in polyester tanks, compartmentalized into an aeration tank followed by a clarifier downstream of a rotary screen (see data sheet 6341).
Designed to treat domestic waste from 200 to 980 users, these plants use the principle of prolonged aeration with recycling and automatic extraction of settled sludge. 
These stations require maintenance because of their operating principle and their property to generate excess sludge (related to bacterial growth), to eliminate.
The OXYMOP rotary sieves+ OXYMOP are designed to guarantee a discharge into superficial hydraulic medium in accordance with the decree of 22 June 2007 after a start-up period of approximately 1 month for the micro-station. This discharge to the superficial hydraulic medium is subject to authorisation by the administrative authorities.

Performance obtained *
BOD5 Less than 35 mg/l
COD Less than 125 mg/l
MES Less than 35 mg/l

These performances are obtained under normal conditions of use, care and maintenance in accordance with the instructions in this operating manual. And in the case of a biodegradable effluent whose concentrations are standard for a domestic effluent.
Note: In the case of collection of effluent from a restaurant's kitchens, a grease separator must be installed upstream of the line.

The rotary screen + oxymop must be preceded by a bar screen (can be integrated into the lifting station if it is provided for).

PDF Technical sheet
The effluents are admitted to the aeration basin at the outlet of the rotary sieve, the sludge (bacteria) suspended in the water to be treated is oxygenated sequentially. The sludge collected at the base of the secondary settling system is recirculated, regardless of the periods of aeration, the excess sludge is sent to a silo for example.
Installation must comply with PH-PRVNC instructions
For implantation in hydromorphic terrain or in the presence of a water table, the water table must not exceed the discharge water line.
Recalls:
Pre-seeding of plants with biomass from activated sludge treatment with a volume equal to 1/3 of the activation basin.
A company approved by SIMOP will carry out the connections, tests and commissioning of the station in the presence of the company that installed it.
A complete guide is available upon request.
A maintenance contract must be signed with a specialist approved by the SIMOP company as soon as it is commissioned. 
The guarantee of results, function and electro-mechanical parts can only be acquired under this condition.

Station maintenance:
Floats located on the surface of the clarifier should be evacuated monthly.
The bottom 2/3 of the sludge must be emptied every 6 months by an approved drainer.  Electromechanical devices must be switched off the day before.
For electro-mechanical devices a regular inspection is necessary.
Ventilation and recirculation times, pre-programmed in the factory, must be checked and adjusted if necessary according to the actual use of the station.