Improved odour control with full-scale multi-layered biological treatment methods

Norway is a leading country on wastewater treatment comprising chemical precipitation processes. This is because Norwegian effluent standards to the North Sea have traditionally focused on phosphorus removal. In most cases, chemical treatment therefore has been considered to give lower investment and operating costs than biological treatment. Norwegian wastewater policy and management is based on the EU guidelines resulting from the EEA (European Economic Area) Agreement. According to the 1991 Urban Wastewater Treatment Directive, this will in most cases require secondary treatment. However, primary treatment can be accepted for plants larger than 10,000 PT with effluents to less sensitive coastal areas, if no negative environmental impacts can be proved. The main objective of the Regional Water, Sewerage and Waste Company (IVAR) is to comply with the prevailing effluent limits at lowest possible cost. During the past four years, IVAR has therefore undertaken comprehensive optimising of the precipitation process including full-scale experiments with different coagulant dosing control systems and different types of coagulants. IVAR also accomplished a feasibility study of introducing biological treatment as an alternative to chemical treatment. Under the prevailing frame conditions of discharge requirements and sludge deposit costs, it is not economically feasible to change to organic coagulants or biological treatment. This conclusion might have to be altered later resulting from the implementation of new EU regulations and increasing sludge deposit costs. This paper presents results from full-scale experiments, extracts from the feasibility study and a comparison of costs. Furthermore, the practical consequences of implementing the EU-guidelines are discussed.

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Nitrification in partially aerated flocculation filters - a full-scale approach

Water Science & Technology ◽

10.2166/wst.1998.0193 ◽

1998 ◽

Vol 38 (3) ◽

pp. 135-142

Author(s):

G. Kolisch

Keyword(s):

Biological Treatment ◽

Suspended Solids ◽

Full Scale ◽

Phosphorus Compounds ◽

Decay Products ◽

Low Concentrations ◽

Aerated Filter ◽

Anoxic Zones ◽

Treatment Step

In a full-scale approach, we investigated whether nitrification can be carried out in partially aerated flocculation filters without compromising the removal of suspended solids. The objective is an aerated filter in addition to an advanced nitrification in the main biological treatment step to reduce low NH4-N concentrations in the effluent to very low concentrations. In two separate sets of experiments with an aerated filtering layer of 0.7 m and 1.4 m, nitrification rates up to 14 g N/(m3/h) were achieved. Compared to unaerated chambers, there was approximately the same removal of particulate COD and of precipitated phosphorus compounds. Due to the formation of anoxic zones, nonspecific denitrification occurred in the chambers under both conditions. Decay products are suspected to be the endogenous H-donors.

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Long term experience with the nutrient limited BAS process for treatment of forest industry wastewaters

Water Science & Technology ◽

10.2166/wst.2007.216 ◽

2007 ◽

Vol 55 (6) ◽

pp. 89-97 ◽

Cited By ~ 2

Author(s):

Å. Malmqvist ◽

T. Welander ◽

L.E. Olsson

Keyword(s):

Biological Treatment ◽

Operating Mode ◽

Full Scale ◽

Forest Industry ◽

Process Stability ◽

Sludge Characteristics ◽

Long Term Treatment ◽

Different Types ◽

Sludge Production

The nutrient limited biofilm-activated sludge (BAS) process was developed with the aim to ensure maximum biological treatment efficiency in combination with good process stability, low sludge production and minimum effluent concentration of nutrients. The first full scale nutrient limited BAS (NLBAS) processes were implemented at Södra Cell Värö and Stora Enso Hylte in 2002. Since then another three full scale installations have been built. The aim of this study was to investigate and summarise the long-term treatment results, process stability, sludge production and sludge characteristics for the five full scale NLBAS processes. It was of particular interest to compare the nutrient limited operating mode with regard to the different types of production and wastewater that the mills represent (kraft, TMP and newsprint, bleached CTMP). The study showed that after the initial start-up period, which varied from a couple of weeks to three to four months, all plants meet their respective discharge limits. The sludge production for the different plants varies between 0.07 and 0.15 kg TSS/kg COD and the sludge characteristics are with few exceptions excellent. In conclusion, the nutrient limited BAS process is suitable for both upgrades and new installations of biological treatment for different types of forest industry wastewaters.

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Industrial-Scale Applications of Fixed Biomass on the Mediterranean Seaboard. Design, Operating Results

Water Science & Technology ◽

10.2166/wst.1990.0154 ◽

1990 ◽

Vol 22 (1-2) ◽

pp. 281-292 ◽

Cited By ~ 8

Author(s):

P. Gilles

Keyword(s):

Flow Rate ◽

Biological Treatment ◽

Full Scale ◽

Industrial Scale ◽

Industrial Technology ◽

Pollution Load ◽

Pollutant Loads ◽

Treatment Stage ◽

The Mediterranean ◽

One Year

The technology that consists of treating sewage on submerged granular filters is now far beyond the stages of research and testing on pilot units. Fifteen or so full-scale facilities are in operation in France using, as a biological treatment stage, the fixed biomass technology as realised by the Biocarbone process, particularly for the treatment of sewage from built-up areas along the seaboard. These are cases where the advantages of this technique can be put to decisive use. The Mediterranean seaboard is an ideal site for this technology. Cases in point are the waterworks of Sanary Bandol (pop.60,000) and Perpignan (pop.160,000), that have been in operation for two years and one year respectively. Waterworks in Monaco (pop.100,000) and Antibes (pop.170,000) will be commissioned in 1989 using the same technology. Results obtained during intensive controls show that the fixed biomass, designed with a suitable industrial technology, is capable of producing in routine conditions, on full industrial-scale plant, a very good quality effluent. (COD : 70 mg/l, TSS : 20 mg/l) for pollutant loads in the order of 8 kg COD/m3 day. It enables the fluctuations in the daily flow-rate and pollution load of the influent to be absorbed. The units currently being built are examples of what can be done in compact roofed facilities incorporating a fixed biomass treatment stage, with the objective of reaching a no-nuisance level.

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Groundwater Remediation Using Biological And Photocatalytic Methods

Hungarian Journal of Industry and Chemistry ◽

10.1515/hjic-2015-0007 ◽

2015 ◽

Vol 43 (1) ◽

pp. 39-44 ◽

Cited By ~ 1

Author(s):

Sándor Guba ◽

Viola Somogyi ◽

Erzsébet Szabóné Bárdos

Keyword(s):

Activated Sludge ◽

Active Ingredient ◽

Biological Treatment ◽

Groundwater Remediation ◽

Uv Light ◽

Transport Modelling ◽

Sludge Treatment ◽

Treatment Methods ◽

Laboratory Conditions ◽

Preliminary Information

Abstract The degradability of two commercially available pesticides was studied using heterogeneous photocatalytic and activated sludge treatment methods. The first pesticide contained 5% quizalofop-P-ethyl as an active ingredient and petroleum naphtha as a solvent, the latter causing difficulties both in photocatalytic and biological treatment methods. The active ingredient of the second compound was acetamiprid. The photocatalysis proved to be effective both under laboratory conditions (using UV light) and when exposed to sunlight, but the pesticides remained stable during the employed biological treatment. Preliminary information on its behaviour in soil was obtained from transport modelling.

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Investigation of a Full-Scale Anaerobic-Aerobic and Constructed Wetlands Integrated System Treating Livestock Wastewater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.113-116.1189 ◽

2010 ◽

Vol 113-116 ◽

pp. 1189-1194

Author(s):

Yong Ming Wu ◽

Jin Bao Wan ◽

Ji Hai Xiong ◽

Shun Fa Wang ◽

Ping Gu

Keyword(s):

Constructed Wetlands ◽

Biological Treatment ◽

Large Scale ◽

Wastewater Treatment Plants ◽

Removal Rate ◽

Full Scale ◽

Integrated System ◽

Tertiary Treatment ◽

Livestock Wastewater ◽

Aerobic Process

A full-scale integrated system of the IOC-SBBR and CWs for the biological treatment of livestock wastewater was carried out in this study, the combined IOC-SBBR process had the removal rates of COD, NH4+-N, TN reached 96.5%, 89% and 81.1%, respectively. CWs were used for the further tertiary treatment of livestock wastewater, which the average removal rate of the NH4+-N and TN was 61.3% and 60.2%, the overall integrated system was superior to the direct anaerobic or aerobic process for the treatment of large-scale livestock wastewater, would provide the valuable design and operation for the livestock wastewater treatment plants.

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