To solve the problem of excessive suspended solids in the wastewater of food testing laboratories, we first need to understand the ** and nature of suspended solids. In general, suspended solids refer to insoluble solid particles in water, which can be produced due to a variety of reasons such as food processing, reagent use, etc. Excessive suspended solids will cause pollution to the water body and affect the treatment effect of laboratory wastewater.
In order to solve the problem of suspended solids exceeding the standard, we can take the following methods to remove suspended solids in wastewater:
1.Natural sedimentation method: using the principle of natural sedimentation with large suspended solids particles, the wastewater is allowed to stand for a period of time, so that the suspended solids can naturally settle to the bottom, and then cleaned up regularly. This method is simple and easy to implement and is suitable for wastewater with low concentrations of suspended solids.
2.Filtration method: The suspended solids in the wastewater are intercepted through the filter medium (such as filter paper, filter cloth, etc.), so that the wastewater can be purified. This method is suitable for wastewater with high concentrations of suspended solids and small particles.
3.Coagulation and sedimentation method: add coagulant to the wastewater, so that the suspended solids particles quickly condense into large particles and settle down. This method can effectively remove suspended solids from wastewater, but it requires the use of chemicals and may produce secondary pollution.
4.Biological treatment method: the organic matter in the wastewater is converted into harmless substances by the metabolism of microorganisms, and the suspended solids are removed through biological flocculation. This method has good treatment results, but requires a long treatment time and suitable conditions for microbial growth.
In practical applications, the appropriate method for removing suspended solids can be selected according to the specific situation of laboratory wastewater. At the same time, in order to reduce the amount of suspended solids, corresponding measures can be taken, such as improving experimental operations, using environmentally friendly reagents, etc.