<strong>Operating</strong> <strong>Manual</strong> for SBR small wastewater treatment systems7. Maintenance, servicing and operationThe plant must be switched on at any time. As operator of a small wastewater treatment plant, youare obliged to ensure the error-free operation of the plant. Almost all operational breakdowns cause adeterioration of the purification performance of the plant. Therefore, these operational breakdowns mustbe detected at an early stage and rectified by you or by a qualified maintenance technician.During any work on the opened cover of cesspit, there is a tripping and fallhazard!The open pit must be secured by suitable measures. Persons involved and/orthird parties may fall into the container! Children are particularly at risk!Fall hazard Due to the biological degradation processes in small wastewater treatmentplants, the generation of (possibly toxic) gases must be expected. Therefore,entering the plant must always be secured by a second person. In any case, afainted person must not be followed, but help must be sought as soon aspossible.High voltageFor activities other than operating the control, the maintenance switch must beset to 0 and/or the mains plug of the cabinet must be pulled out!Any maintenance and repair work on the cabinet system must be carried out by amaintenance technician or an electrician!28<strong>KLARO</strong> <strong>GmbH</strong>
<strong>Operating</strong> <strong>Manual</strong> for SBR small wastewater treatment systems7.1. Tasks of the operatorIn order to ensure an error-free operation, the following checks must be performed:7.1.1. Daily check- It must be checked whether the plant is run properly. This is the case if the operating indicator lamplights up green and no warning signal can be heard. A fault is displayed as described in chapter“control of the plant”. In the event of an incident, we ask you to read the liquid crystal display and toinform the service personnel about the displayed fault or, if possible, to rectify the fault yourself.7.1.2. Weekly checks- Checking the water levels; sludge must not enter the SBR chamber in an uncontrolled manner,- Checking the inlets and outlets for clogging (visual check),- Reading the operating hours counters of the aerator (total operating hours), the ventilation (valve 2)and the sludge return (valve 4), if required, also the operating hours counter of further aggregatesand recording them in the operation log,- Function control of the lifts and the ventilation via the setting “<strong>Manual</strong> mode”.7.1.3. Monthly checks- Visual check for any sludge overflow, blurring or discolouration in the outlet,- Checking the inlets and outlets for clogging (visual check),- Reading the operating hours counters of the aerator (total operating hours), the ventilation (valve 2)and the sludge return (valve 4), if required, also the operating hours counters of further aggregatesand recording them in the operation log,- Checking the air filter:The filter of the switch cabinet ventilation (ventilation grilles on the left and right side in the housingwall with an inside cabinet and/or on the rear with an outdoors cabinet) must be checked and, ifrequired, cleaned or replaced. For this, the grilles on the outside of the cabinet must be removed.The snap lock can be unlocked by applying slight pressure and using a screwdriver and the grille canbe removed by hand. The filter mat lies, without any further fastening means, in the ventilation pitand can be shaken out and/or blown out. The interval at which the filter of the aerator must becleaned or replaced depends on the extent of contamination caused by the atmospheric conditionsaround the application. In order to check or replace the filter on the compressor, the servicedocumentation of the compressor manufacturer provided in the annex must be complied with.- Checking the phosphate precipitation unit (if any): function control of the precipitant pump andchecking the fill level of the precipitant container,- Checking the function of the power outage alarm unit.7.1.4. Sludge drainageIn a small wastewater treatment plant, there are different types of sludge. Only the faecal sludge thataccumulates in the first chamber is removed. It consists of sedimented residues resulting from thewastewater treatment. In small wastewater treatment plants, the faecal sludge and/or sewage sludgeconsists of dead micro-organisms of the biological treatment stage and the settled solids resulting fromthe pre-cleaning. The height of the accumulated sludge in the sludge storage is measured by skilledmaintenance personnel using a sludge pipette. The plant is designed in such a manner that, withpermanent full-load operation and compliance with the operator and maintenance obligations, the<strong>KLARO</strong> <strong>GmbH</strong> 29