|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Sequenced anaerobic-aerobic treatment of landfill leachatesтезисы доклада
- Авторы: Kalyuzhnyi S., Gladchenko M.
- Сборник: In: Abstract book of the 3rd Intern. Congress "Waste Management"
- Тезисы
- Год издания: 2003
- Место издания: Moscow
- Первая страница: 271
- Аннотация: As a first step of treatment of high strength, strong nitrogenous landfill leachates (total COD – 9.66-20.56 g/l, total nitrogen 780-1,080 mg/l), a performance of laboratory UASB reactors has been investigated under sub-mesophilic (193 oC) and psychrophilic (102 oC) conditions. Under hydraulic retention time (HRT) of around 1.2 days, when the average organic loading rate (OLR) was around 8.5 g COD/l/day, the total COD removal accounted for 71 % (on the average) with the total COD effluent concentrations of around 3 g/l for sub-mesophilic regime. The psychrophilic treatment conducted under the average HRT of 2.44 days and the average OLR of 4.2 g COD/l/day showed an average total COD removal of 58% giving the effluents (4.24 g COD/l, on the average) more suitable for subsequent biological nitrogen removal. Both anaerobic regimes used for leachate treatment were quite efficient for elimination of heavy metals (Fe, Zn, Cu, Pb, Cd) by concomitant precipitation in the form of insoluble sulphides inside the sludge bed. The subsequent submesophilic aerobic-anoxic treatment of submesophilic anaerobic effluents led to only 75% of total inorganic N removal due to COD deficiency for denitrification created by too efficient anaerobic step. On the contrary, psychrophilic anaerobic effluents (richer in COD compared to the submesophilic ones) were more suitable for subsequent aerobic-anoxic treatment giving the total N removal of 95 and 92% at 19 and 10 oC, respectively. Thus, the application of sequenced anaerobic-aerobic treatment of high strength, strong nitrogenous landfill leachates aerobic/anoxic biofilter was acceptable for elimination of biodegradable COD and nitrogen approaching to the current standards for direct discharge of treated wastewater.
- Добавил в систему: Гладченко Марина Анатольевна