How to determine whether the operation of the sewage treatment plant is low reload

Whether the actual inlet water detection data is consistent with the design data, if the inlet water data is too large, it is called overload operation, and it is difficult to meet the effluent standard; The inlet water is consistent with the design data, and the error of 15% is within the range; If the influent data is 50% lower than the design data, it is a low load. Low-load operation can be found by running records, such as DO, MLSS, SV30, and a series of data viewing and analysis. low-load hazards; High energy consumption, long settling time of SV30, loose sludge, suspended fine suspended solids, and low sewage removal rate.

Solution; It is to calculate F m to see if the ratio of microorganisms to pollutants is within the range (if it is a low load, reduce the MLSS content and discharge a little activated sludge).

Please read more books on sewage treatment, and you can solve the problem.

1. Operationally speaking, the inlet water concentration is increased, and if the effluent water quality is almost unchanged, it is a low load.

2. In terms of design, check the residence time and load, and compare it with the conventional design value, and it can also be seen whether it is a low load.

The load rate of the sewage treatment plant = the actual daily water intake and the daily design treatment capacity. Therefore, the most direct way to judge whether the sewage plant is running at low load is the actual daily water inflow and daily design treatment capacity, and the general operating load rate is not less than 60%, and the maximum load rate stipulated by the state shall not be higher than 120%. If you don't know the design treatment capacity, you can also roughly judge whether it is running at low load through the growth of the sludge in the biochemical tank, such as DO, PH value, water temperature, nutrient ratio, etc. are normal, but the activated sludge still cannot grow normally, it may be caused by low load operation.

I will be the problem in environmental protection. The above is someone else's reply, I hope it will be helpful to you.

Dear, hello, sewage rolling treatment from high load to low load will affect the biological treatment efficiency of sewage treatment, such as the anaerobic reaction of the anaerobic pond may be inhibited, as well as the denitrification reaction inhibition. In addition, the functional structure of sewage treatment facilities will also change, the physical properties of sludge will also be affected, the movement of sludge, sedimentation and the deposition of suspended solids will also be affected, and then affect the gravity sedimentation process of sewage in the sewage treatment process, thereby affecting the effect of the entire sewage treatment process and reducing the efficiency of sewage treatment facilities.

Key points of judgment: The effluent is turbid.

The analysis shows that most of the particulate matter carried in the discharged water caused by activated sludge load is activated sludge non-sludge treatment process particles, and the activity of activated sludge is enhanced when impacted. Due to the high activity between the particles, the flocculation between the activated sludge particles is poor.

As a result, a large number of fine, unflocculated activated sludge particles appear.

Process control index performance:

SV: The deposition of the slow supernatant is diffuse and cloudy.

DO: The same aeration DO is significantly reduced, reducing sludge growth by about 30% Sludge growth: Sludge grows fast, about 20% per day.

f m: f m exceeded.

Sludge treatment countermeasures: Reducing impact load by homogenizing the water quality and quantity of the physical and chemical area. and increase the MLSS to combat the load.

Impact load refers to the impact force of sewage and the requirements for the bearing capacity provided by the sewage treatment system. or the amount of work to be undertaken.