5.As collector drains in subsoil system, sewerage treatment plant sludge drying bed under drains HDPE/PVC Double Wall Corrugated Pipe Making Machine Double Wall Corrugated Pipe Production Line PE/HDPE/PVC double wall corrugated pipe ext...
Contamination from sewage outfall pipes, from dumping of sludge or other wastes, and from oil spills can harm marine life, especially microscopic phytoplankton that serve as food for larger aquatic organisms. Sometimes, unsightly and dangerous waste materials can be washed back to shore, littering ...