The feasibility study of using non-woven MBR for reduction of hydrolysed biosolids

In this study, non-woven MBR was used to treat hydrolysed biosolids wasted from a biological treatment plant. The concentration of SS of hydrolysed biosolids in influent was 10,000 mg/L and the concentration of SS in effluent was less than 200 mg/L with/without discharging wasted sludge depending on different HRTs, i.e. 20, 15 and 10 d. The results indicated that the percentage of biosolids reduction in terms of SS removal efficiency in non-woven MBR was around 65, 60 and 35%, respectively, depending on different HRTs. Meanwhile, the ratio of VSS/SS was decreased from 0.78 to 0.50 and the number of smaller inorganic particle sizes increased due to extended SRT. The initial flux in the non-woven MBR was set at 0.02, 0.04 and 0.06 m3/m2/day and trans-membrane pressure (TMP) was less than 10 kPa. The permeate flux could be maintained quite stably due to lower TMP. The proposed non-woven MBR could be used to achieve the reduction of biosolids in the wastewater treatment plant.

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Modelling the performance of anaerobic wastewater stabilization ponds

Water Science & Technology ◽

10.2166/wst.1995.0483 ◽

1995 ◽

Vol 31 (12) ◽

pp. 171-183 ◽

Cited By ~ 4

Author(s):

M. M. Saqqar ◽

M. B. Pescod

Keyword(s):

Wastewater Treatment ◽

Water Temperature ◽

Removal Efficiency ◽

Wastewater Treatment Plant ◽

Suspended Solids ◽

Treatment Plant ◽

Pond Water ◽

Removal Efficiencies ◽

Wastewater Stabilization Ponds ◽

Raw Wastewater

The performance of the primary anaerobic pond at the Alsamra Wastewater Treatment Plant in Jordan was monitored over 48 months. Overall averages for the removal efficiencies of BOD5, COD and suspended solids were 53%, 53% and 74%, respectively. An improvement in removal efficiency with increase in pond water temperature was demonstrated. A model, which takes into account the variability of raw wastewater at different locations, has been developed to describe the performance of a primary anaerobic pond in terms of a settleability ratio for the raw wastewater. The model has been verified by illustrating the high correlation between actual and predicted pond performance.

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A feasibility study of the installation of a modular bioreactor inside a chemical scrubber at a wastewater treatment plant

Process Safety and Environmental Protection ◽

10.1016/j.psep.2021.01.019 ◽

2021 ◽

Vol 147 ◽

pp. 932-941

Author(s):

Astrid Barona ◽

Adrián Malo ◽

Ana Elías ◽

Naiara Rojo ◽

Arrate Santaolalla ◽

...

Keyword(s):

Wastewater Treatment ◽

Feasibility Study ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

Chemical Scrubber

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Investigation of pharmaceuticals in a conventional wastewater treatment plant: Removal efficiency, seasonal variation and impact of a nearby hospital

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105548 ◽

2021 ◽

Vol 9 (4) ◽

pp. 105548

Author(s):

Lubertus Bijlsma ◽

Elena Pitarch ◽

Eddie Fonseca ◽

María Ibáñez ◽

Ana María Botero ◽

...

Keyword(s):

Wastewater Treatment ◽

Seasonal Variation ◽

Removal Efficiency ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

Plant Removal ◽

Conventional Wastewater Treatment

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Savings with upgraded performance through improved activated sludge denitrification in the combined activated sludge–biofilter system of the Southpest Wastewater Treatment Plant

Water Science & Technology ◽

10.2166/wst.2008.232 ◽

2008 ◽

Vol 57 (8) ◽

pp. 1287-1293 ◽

Cited By ~ 1

Author(s):

A. Jobbágy ◽

G. M. Tardy ◽

Gy. Palkó ◽

A. Benáková ◽

O. Krhutková ◽

...

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Wastewater Treatment Plant ◽

Biological Treatment ◽

Treatment Plant ◽

Oxygen Demand ◽

Process Efficiency ◽

Initial Value ◽

Initial Profile ◽

Biological Treatment System

The purpose of the experiments was to increase the rate of activated sludge denitrification in the combined biological treatment system of the Southpest Wastewater Treatment Plant in order to gain savings in cost and energy and improve process efficiency. Initial profile measurements revealed excess denitrification capacity of the preclarified wastewater. As a consequence, flow of nitrification filter effluent recirculated to the anoxic activated sludge basins was increased from 23,000 m3 d−1 to 42,288 m3 d−1 at an average preclarified influent flow of 64,843 m3 d−1, Both simulation studies and microbiological investigations suggested that activated sludge nitrification, achieved despite the low SRT (2–3 days), was initiated by the backseeding from the nitrification filters and facilitated by the decreased oxygen demand of the influent organics used for denitrification. With the improved activated sludge denitrification, methanol demand could be decreased to about half of the initial value. With the increased efficiency of the activated sludge pre-denitrification, plant effluent COD levels decreased from 40–70 mg l−1 to < 30–45 mg l−1 due to the decreased likelihood of methanol overdosing in the denitrification filter

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Occurrence and behaviour of pharmaceutical compounds in a Portuguese wastewater treatment plant: Removal efficiency through conventional treatment processes

Environmental Science and Pollution Research ◽

10.1007/s11356-017-9012-7 ◽

2017 ◽

Vol 24 (17) ◽

pp. 14717-14734 ◽

Cited By ~ 15

Author(s):

Vanessa de Jesus Gaffney ◽

Vitor Vale Cardoso ◽

Eugénia Cardoso ◽

Ana Paula Teixeira ◽

José Martins ◽

...

Keyword(s):

Wastewater Treatment ◽

Removal Efficiency ◽

Wastewater Treatment Plant ◽

Conventional Treatment ◽

Treatment Plant ◽

Pharmaceutical Compounds ◽

Treatment Processes ◽

Plant Removal

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Implementation of EU discharge guidelines at IVAR's Regional Wastewater Treatment Plant of North Jaeren, Stavanger, Norway

Water Science & Technology ◽

10.2166/wst.2001.0008 ◽

2001 ◽

Vol 44 (1) ◽

pp. 33-39 ◽

Cited By ~ 1

Author(s):

O. Tornes

Keyword(s):

Wastewater Treatment ◽

Feasibility Study ◽

Chemical Treatment ◽

Biological Treatment ◽

Treatment Plant ◽

Primary Treatment ◽

Full Scale ◽

Precipitation Process ◽

European Economic Area ◽

The Eu

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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