Food is an essential necessity in our daily lives, which is why there are numerous food factories. Similar to other industries, food production generates wastewater, involving wastewater discharge and Online Water Quality Monitoring. Therefore, it is crucial to understand the water quality monitoring of wastewater produced by food factories.

Monitoring indicators vary across different monitoring points. The following outlines the required indicators for wastewater monitoring at different points in food factories:

1.Total Wastewater Discharge Outlet: This outlet exists in every factory that generates wastewater. Monitoring indicators include: chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, suspended solids (SS), color, flow rate, pH value, animal and vegetable oils, coliform bacteria, etc.

2.Domestic Sewage Discharge Outlet: Monitoring indicators include: animal and vegetable oils, COD, ammonia nitrogen, total phosphorus, total nitrogen, suspended solids, etc.

3.Rainwater Discharge Outlet: Relatively fewer indicators are monitored here, specifically chemical oxygen demand (COD) and suspended solids (SS).

Having understood the wastewater monitoring indicators for food factories, several key reminders are as follows: Ecological and environmental authorities at or above the municipal level of districts may stipulate the installation of Water Quality Monitors for the monitoring of various pollutant indicators, adopting automatic monitoring functions. In addition, for key units in total phosphorus total control areas and key industries with nitrogen and phosphorus emissions in terms of water environmental quality, full-automatic monitoring shall also be implemented, with a daily monitoring frequency.