EFFECT OF SOLIDS RETENTION TIME ON NITROGEN REMOVAL IN INTERMITTENT CYCLE EXTENDED AERATION ACTIVATED SLUDGE (ICEAS) SYSTEM
The effect of food to microorganism ratio (F:M) on nitrogen removal in intermittent cycle extended aeration activated sludge (ICEAS) system, has been studied using a large pilot scale treatment system. A basic operation schedule for BOD removal was used in the study. The objective of the study was also to develop data that would provide […]
Författare ANDERS WISTRÖM
ERFARENHETER FRÅN PILOTFÖRSÖK FÖR LÅNGTGÅENDE KVÄVEREDUKTION OCH FOSFORREDUKTION I DANMARK / Experiences from Pilot Tests in Denmark for Efficient Nitrogen and Phosphorus Removal
The demand in Denmark for efficient wastewater treatment has increased dramatically lately. Before 1993 most wastewater treatment plants must meet the effluent quality demand 15 mg/1 BOD, 8 mg/l nitrogen and 1.5 mg/1 phosphorus. This means that the nitrogen removal has to be in the order of 70-80 % also at low wastewater temperatures (6-7°C). […]
Författare MAGNUS EMANUELSSON
Nyckelord (Keyword) nitrogen reduction, pilot test, pre-denitrification, chemical precipitation, methanol.
Successful treatment of leachates is often found to be difficult with respect to COD and nutrient removal. This paper presents the results of pilot plant tests carried out in situ at the sanitary landfill, Bösarp, operated by the city ofVarberg. The tests were performed by means of SBR-technics. The results have been very encouraging with […]
Författare STIG MORLING, and BENNY JOHANSSON
Nyckelord (Keyword) leachates, SBR-technics, low temperature, concentrated waste waters, nitrogen removal.
A large number of measurements and field studies on the quality of combined sewer overflow discharge quality have been carried out during the recent years. These measurements indicate that commonly used calculation methods for determining the pollution load from combined sewer overflows may greatly underestimate the actual load. This is due to the fact that […]
Författare RONNY BERNDTSSON, and WILLIAM HOGLAND and MAGNUS LARSSON,
Nyckelord (Keyword) combined sewer overflow discharge quality, wash-out, pollutants, sedimentation.
ETT OPERATIVSYSTEM FÖR MILJÖKONSEKVENSANALYS FÖR AKVATISKA EKOSYSTEM, An Operative System for Environmental Consequence Analysis for Aquatic Ecosystems
The intention with this paper is to present one type of operative system for environmental consequence analysis (ECA) for natural aquatic ecosystems, i.e. lakes, rivers and marine areas. The operative system consists of two parts: (1) a “note system” for ECA, i.e., the scientific framework and concepts and (2) the “instruments”, i.e., the tools which […]
Författare LARS HÅKANSON
Nyckelord (Keyword) environmental consequence analysis, lakes, rivers, marine areas, eutrophication, contamination, acidification, load diagrams, cost-benefit analysis.