Published 2016 years 11 month 01 Date
Last updated 2017 years 03 month 15 Date
Thank you for your deep understanding and cooperation in the sewerage business.
Almost 20 years have passed since the sewerage system was put into service, but the flushing rate has exceeded XNUMX%, and the understanding of sewerage systems is increasing.However, even outside the prefecture, water quality accidents due to incorrect usage will not follow.
Even in our town, due to the flora and fauna of ramen shops, the sewer mains are clogged with lard, and the sewerage of the local residents continues to be unusable.Therefore, we request that businesses using Gristrap check the items listed below, review their daily maintenance methods, and thoroughly clean them.
1. Impact on the sewerage facilities, etc. of plants and animals oils
(1) The reference in the regulations
If the flow of animal and vegetable oils and fats to the sewage system, must comply with the "animal and vegetable fats and oils content 30mg / ℓ or less", which is the effluent standard.
(2) of the bad smell in the store generated
If you neglect the day-to-day management of the grease trap, and corruption was or separation "sewage in the tank," "animal and vegetable oils", diverges the stench, it will be discomfort to the customers and the surrounding everyone.
(3) impact on the sewerage facilities
XNUMX) Impact on drainage pipes
- Occurrence of poor flow of sewage due to blockage in the pipeline In particular, oils and fats that harden at room temperature, such as lard, mix with other impurities and adhere to the inside of the sewer pipe, impairing the flow of sewerage and in some cases blocking the sewer pipe. It may cause you to do so. → Backflow and outflow of sewage
- Impact on the manhole in and pump hall
Contamination due to massive generation of "garbage (scum)" containing oils, malfunction of the pump, issuance of abnormality warning etc.
XNUMX) Impact on sewage treatment facilities
① Impact on purification function
In Nagato purification center, but purification of sewage by microorganisms (activated sludge method) have been made, when processing the sewage by microorganisms, oils covers the surface of the sewage, that the oxygen in the air is dissolved in water not only hinder, are encompassed within the activated sludge, which decreases the inhibitory processes function its purification function and precipitation separation. In addition, it also has an impact on the filtration and dewatering in the sludge treatment.
- Impact on the sedimentation pond, water discharged
If oils may not be sufficiently treated for lighter than water, as well as scum that contains the oil will float a lot on the surface, flows out along with the water discharged, it will be which leads to pollution of rivers (Yodakawa).
④ Impact on equipment
In particular, lard-based oils and fats cause deterioration of equipment such as pump cables, and require costs for replacement and repair.
Reference: How to Clean grease trap
① cleaning of basket Let's done every day
Basket of the body is intended to receive, such as dirt and debris. At least 1 Date 1 times let clean removal. Also, please do not use for other purposes.
② oil and fat content of the collection [of cleaning time standard: week 1 times]
Since the oils and fats (lard) s will accumulate floating in the body, please recovered 1 times are scooped up in at least 1 week.
.③ bottom sediment removal of the cleaning time guideline: month 1 times]
Since the reservoir is precipitate to the bottom of the unit, please 1 times are scooped removed at least 1 months.
④ trap inside of cleaning [of cleaning time guideline: 2 ~ 3 times in 1 months]
Trap inside, please clean 2 times 3 ~ 1 months. Since the cap attached to the trap tube is odor stop, please do not remove absolutely except when cleaning.
※ cap of cleaning port Let's return to the original position not forget