ENVIROCELL TRAINING SEMINAR

OPTIMISING WASTEWATER TREATMENT AT PAPER MILLS

This seminar is aimed at anyone involved in the design and operation of mill treatment plants from operators to production/technical staff, including suppliers of treatment plant and chemicals. The emphasis is on practical aspects of plant operation with a view to improving understanding and overall plant performance and on the more recent process developments within each treatment category.

PROGRAMME

Pressures and motivations for optimising wastewater treatment

- legislative pressures such as IPPC, framework EU water directive, etc
- environmental effects of discharges to water
- key parameters for discharge regulation and wastewater recycling
- approaches to treatment and disposal

Minimising wastewater loads within the process

- selection of raw materials and their mode of use
- process water management and degree of water closure
- use of clean technologies: retention aids, savealls, etc
- monitoring for control and optimisation

Primary wastewater processes for clarification

- theory of solids-liquid separation and particle aggregation
- comparison of sedimentation, flotation and filtration processes
- key operational parameters for process optimisation

Secondary treatment processes for BOD/COD removal

- comparison of aerobic and anaerobic biotreatment processes
- key operational parameters for process optimisation
- other approaches such as electrochemical treatment

Tertiary treatment options

- clarification for capture of residual suspended solids
- removal of non-biodegradable organics
- removal of dissolved electrolytes

Examples of state-of-the art treatment plants at paper mills