Graywater quality
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This post was last edited by lflsedin on 2015-4-16 at 20:39. The graywater treatment unit sometimes analyzes the ammonia nitrogen content and chemical oxygen demand; where is sampling usually done for these analyses, in the graywater tank? What happens if it exceeds the limit?
It’s the graywater sink outlet; if the levels exceed the limits, it’s necessary to increase the discharge of graywater, thereby boosting the water circulation in the system… Just my opinion
At the outlet of the low-pressure ash water pump, if the parameters exceed the specified values, increase the amount of wastewater discharged, or replace the water with fresh water or deionized water. If the parameters still exceed the limits despite an unchanged wastewater discharge volume, investigate the causes of this issue
Sampling and analysis are mainly carried out in the gray water tanks; if the analysis shows that the levels are above the allowed limits, then the amount of wastewater discharged from the system is increased. At the same time, it is also necessary to control the low-temperature condensate in the stripping towers used in various processing stages, and this is achieved by controlling the operating temperature of these stripping towers.
Sampling at the inlet and outlet of the low-pressure ash water pump is generally acceptable. Apart from discharge, can we also conduct a deeper analysis of the reasons for exceeding the standards? And what impact do these two excesses have on the system’s operation? Does a high ammonia level necessarily mean a high pH value in the system?
Generally, samples can be taken from the inlets and outlets of the low-pressure ash water pump and the high-pressure ash water pump for analysis; if the parameters exceed the specified limits, the water quality is adjusted by adding more feed water to the deaerator and increasing the discharge volume
What is the control temperature for operating the stripping tower in your shift? Is there a significant relationship between COD and this temperature?
Personally, I believe that ammonia nitrogen levels are related to temperature, while COD has little relation to temperature.
It is certain that when ammonia nitrogen levels are high, the system’s pH value will also be high.
Ammonia nitrogen can only be removed and released into the atmosphere through the terminal stripping tower; generally, it is difficult to decompose ammonia nitrogen at temperatures below 1000°... This is because there is an appropriate ratio between ammonia nitrogen and COD that is suitable for wastewater treatment bacteria and algae. Here, that ratio seems to be 2:1. Excess ammonia nitrogen can only lead to an increase in carbon sources, which in turn places a strain on wastewater treatment processes. Nowadays, environmental regulations require daily cumulative assessments