Wastewater treatment system wood processing industry

Wastewater Treatment with clarifier in ClearFox® modular container system

Project

Treatment of wood condensate wastewater

Data

2019

Location

Thuringia, Germany

Application

ClearFox® container treatment plant

Size

72 m³/d

Effluent quality

Direct discharge to the environment – surface water

Modules

Fixed bed biological reactor FBR

Lamella clarifier

nutrient dosing and pH-Value adjustment

sludge dewatering container

Characteristics

Quick commissioning (Plug & Play)

Compensation of the nutrient deficiency

Sector

Wood drying, Sawmill

SITUATION

Wood is the raw material of the future. In order to enable environmentally friendly construction, our customer, a leading German sawmill, is focussed on the processing of regional raw materials in the production of high-quality sawn timber products. In order to meet the growing demand for dried construction timber with a wood moisture content of 8 – 16 %, our customer expanded its timber drying plants.

During the drying process, the water stored in the wood is expelled and released into the air. The heat stored here is recovered in a heat exchanger. The condensate remains as residual material that must be treated.

PROBLEM

The soil condition survey of the German Federal Ministry of Food and Agriculture shows that a large part of the forest areas in Germany are oversupplied with nitrogen. Phosphorus deficiency is again found in all main tree species.

Since these nutrients are contained in the condensate, the Water Management Office has called for a sewage treatment plant to prevent increased nitrogen in wastewater discharges into the environment.

As a company that is dependent on healthy and functioning ecosystems and thus committed to environmental protection, it was a matter of necessity to protect the surrounding waters from excessive nutrient inputs by discharging the polluted condensate.

SOLUTION

With the construction of the new drying factory, the space available on site became increasingly limited. For this reason, the decision was made to use a space-saving and proven containerized sewage treatment plant from ClearFox.

The industrial wastewater treatment plant comprises the compact plant components, pH-value adjustment, P-nutrient dosing, biological treatment as well as the lamella separator (secondary clarifier) and sludge dewatering. The cost-saving wastewater technology makes it possible to clarify the condensate produced during drying in order to comply with the prescribed limit values.