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IFAS and ShearCon Process in Wastewater Treatment

In conventional sewage treatment plants (STPs), the settling veloctiy of sludge as well as sedimentation volume in the secondary clarifier are the main limiting factors for the allowed maximum biomass concentrations in the aeration tank. The IFAS system and the ShearCon process address this issue , enabling a much higher concentrations of MLSS and a higher sludge age than what is achievable in conventional STPs.

ShearCon Process

The ShearCon process is the optimization of the conventional IFAS process. It enriches high-quality biomass in the biological reactor using CLERATEC® technology and the Jaeger aeration system. The premium sludge produced from ShearCon process exhibits two unique features: an excellent settling velocity and the comparably high nitrification rate, as shown by data from Geiselbullach wastewater treatment plant. More detailed information on the plant can be found in the case study.

1987 (without CLEARTEC®)

Parameters	Inlet [mg/l]	Outflow [mg/l]	Removal rate [%]
CSB	321	53	82,9
BSB₅	172	11	93,5
NH₄-N	36	32	11,1

Inlet

CSB: 321 mg/l
BSB₄: 172 mg/l
NH₄-N: 36 mg/l

Outflow

CSB: 53 mg/l
BSB₄: 11 mg/l
NH₄-N: 32 mg/l

Removal rate

CSB: 82,9 %
BSB₄: 93,5 %
NH₄-N: 11,1 %

2022 (with CLEARTEC®)

Parameters	Inlet [mg/l]	Outflow [mg/l]	Removal rate [%]	Limit value [mg/l]
CSB	602	19	96,8	33
BSB₅	213	1,3	99,4	15
NH₄-N	40	1,17 (Jan-Dez)	97,1	-
NH₄-N	40	0,3 (Mai-Okt)	99,3	10

Inlet

CSB: 602 mg/l
BSB₄: 213 mg/l
NH₄-N: 40 mg/l

Outflow

CSB: 19 mg/l
BSB₄: 1,3 mg/l
NH₄-N: 1,17 mg/l (Jan-Dez)
NH₄-N: 0,3 mg/l (Mai-Okt)

Removal rate

CSB: 96,8 %
BSB₄: 99,4 %
NH₄-N: 97,1 % (Jan-Dez)
NH₄-N: 99,3 % (Mai-Okt)

Limit value

CSB: 33 mg/l
BSB₄: 15 mg/l
NH₄-N: 10 mg/l

IFAS-conventional

The integrated fixed film activated sludge (IFAS) process combines the benefits of conventional activated sludge and biofilm systems by integrating both technologies in a single reactor. In an IFAS system, synthetic media is used in the aeration tank as a growth surface for additional biomass. This combination enables a significantly higher biomass concentration and a higher sludge age compared to conventional activated sludge processes. Our IFAS technology has been integrated into municipal and industrial wastewater treatment plants to upgrade existing systems (improving treatment capacity and effluent quality) and/or to reduce the footprint of new plants (by optimizing aeration tank volume).

The process with CLERATEC®

The patented CLERATEC® technology unfolds its full potential when used in combination with suspended biomass (8). Loop bands are woven into the growth strip of the CLERATEC® growth carrier (1) and provide an ideal habitat due to the large inner surface in the growth strip. This bacteria settle in greater numbers.
The oxygen supply to the biomass through air intake (6) (7), which reduces the thickness of the biofilm (2) due to the flexibility (3) of the carrier.

The constant removal of older biomass (4).
The biomass is removed by bacterial metabolic processes (5). This results in the formation of new, active biomass and interfaces are renewed. The sheared biomass passes into the suspension, where it forms a highly effective “third biomass fraction” with very good settling properties in the system (it is our know how).
The aeration thus ensures both an ideal supply of oxygen to the active biomass and regular removal of the biofilm from the suspension.

Regular removal of the biofilm from the surface, which is made possible by the flexibility of the textile. Consequently
an enrichment (maintenance) of the powerful, easily settleable third biomass fraction takes place.

Get in touch

Kontakt JUT

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Natcha Kosolkamolmas

Sales

Tel. +49 51164644415 n.kosolkamolmas@jaeger-envirotech.com

Jaeger Rubber & Plastics (Shenzhen) Ltd.

Tel. +86 755 - 29832412 info@jaeger-shenzhen.cn

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