Application story

Pig farming complex. Biological treatment under heavy loading.

Stabilise biological treatment of heavily loaded manure-containing wastewater during plant start-up and reconstruction.

Programme outcome

2019 · analytical summary dated 1 February 2020

Aeration under heavy loading4 of 6 blowers switched offDissolved oxygen remained around 6.5 mg/L. Outcome of the 2019 programme.

Initial situation

Influent flow of 500–3,000 m³/day, with inlet COD up to 10,500 mg O₂/L. Aeration tanks had unstable oxygen conditions, floating foam and odours. The process included separation, a bioreactor, ultrafiltration and lagoons.

Actions taken

Continuous BIOFOX dosing was established at the equalisation-tank inlet. Aeration, recirculation, excess sludge removal and key-point monitoring were adjusted without changing the treatment configuration.

Application results

Oxygen conditions stabilised and floating foam disappeared. Four of six blowers were switched off while dissolved oxygen remained around 6.5 mg/L. Separated concentrate was composted in two to three weeks, with reduced odours.

Site and period

Inlet and outlet values relate to different process points and sampling dates. The blower configuration is reported without calculating an energy-saving percentage.

Documentary basis

RASTR analytical summary dated 1 February 2020, pp. 1–2.

A similar challenge at your site?

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