Wei Chen
Support for Major Reshape of MARPOL Annex IV
Disinfecting raw sewage is ineffective and harmful. The comminuting and disinfecting systems are a disservice to the IMO's asp...
Avoiding Non-Compliance in Ship Generated Food Wastes
Seeing custom officers stopping certain food products (among other things) at the airport, one might find it hard to contemplate t...
Opinion: Grey Water Related Non-Conformities Need to be Addressed
Manufacturers are there to innovate, to compete, to think outside-the-box and to test boundaries. However, there is a line, drawn...
MEPC 74 Agrees to Revise MARPOL Annex IV While Non-Conformities Spread
To protect marine water from ships’ sewage discharges is no less important than any other environmental aspirations of ...
Sewage Chlorination Without De-chlorination: A Certified Impossibility
The approval regime has been in the blood of the marine industry. It has served well to safety equipment, but can the same be said...
Call for Action on Sewage Treatment with No-Sludge Production
In late 2018, The Maritime Executive featured an editorial by me, Dr. Wei Chen of Wärtsilä Water Systems, on the subject...
Sewage from Ships – Better Guidelines are Needed
The IMO’s MARPOL Annex IV Convention aims at the “Prevention of pollution by sewage from ships.” Installing an a...
Sewage from Ships – Rules and Realities
Sewage pollution control was the first environmental initiative in history. Technologies and regulations for the land-based wastew...