餐厨垃圾废水作为外加碳源与生活垃圾渗滤液协同处理的研究

Study on Co-treatment of Food Waste Wastewater as Additional Carbon Source with Landfill Leachate

以餐厨垃圾废水作为外加碳源,投加到生活垃圾渗滤液一级A/O生化系统中与生活垃圾渗滤液协同处理,进行了现场试验,研究了餐厨垃圾废水投加量对COD、氨氮、TN、TP的去除效率的影响,试验表明各污染物的去除效率均随餐厨垃圾废水投加比例的提高而增大,当餐厨垃圾废水的投加比例为6.76%时,COD、氨氮、TN、TP的去除率最高分别可达96.06%、98.75%、72.71%和97.38%,最高平均去除容积负荷分别可达1.177 kgCOD/(m^(3)·d)、0.212 kg氨氮/(m^(3)·d)、0.416 kgTN/(m^(3)·d)和0.0055 kgTP/(m^(3)·d),表明餐厨垃圾废水能促进生物脱氮作用,提高生化系统TN的去除效率,减少生物脱氮处理药剂成本,同时餐厨垃圾废水也得到了有效处理。

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/(m^(3)·d),0.212 kg ammonia nitrogen/(m^(3)·d),0.416 kgTN/(m^(3)·d),and 0.0055 kgTP/(m^(3)·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.