Study on Co-treatment of Food Waste Wastewater as Additional Carbon Source with Landfill Leachate
An in-situ field experiment was conducted to study the impact of the dosage of food waste wastewater on the removal efficiency of COD,ammonia nitrogen,TN,and TP by adding it as an additional carbon source to the primary A/O biochemical system for landfill leachate for co-treatment.The experiment results showed that the removal efficiency of each pollutant increased with the increase in the proportion of food waste wastewater added.When the proportion of food waste wastewater added was 6.76％,the removal rates of COD,ammonia nitrogen,TN,and TP reached their highest values of 96.06％,98.75％,72.71％,and 97.38％,respectively.The highest average removal volume loads were 1.177 kgCOD/(m3·d),0.212 kg ammonia nitrogen/(m3·d),0.416 kgTN/(m3·d),and 0.0055 kgTP/(m3·d),respectively.This indicated that food waste wastewater could promote biological denitrification,improve the removal efficiency of TN in the biochemical system,and reduce the cost of biological nitrogen removal treatment agents.At the same time,the food waste wastewater was also effectively treated.
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