Retting of coconut husk - a unique case of water pollution on the South West coast of India

• Published in: International journal of environmental studies 1997-01, Vol.52 (1-4), p.335-355
• Main Author: Nandan, S. Bijoy
• Format: Article
• Language: English
• Subjects: Agricultural runoff; Ammonia; Animal, plant and microbial ecology; Applied ecology; Biological and medical sciences; Ecotoxicology, biological effects of pollution; Environmental impact; environmental quality; fauna; Fundamental and applied biological sciences. Psychology; Hydrogen sulfide; Marine and brackish environment; Plants (botany); retting; Water pollution
• ISSN: 0020-7233; 1029-0400
• DOI: 10.1080/00207239708711110

The extensive backwaters of Kerala are the sites for a flourishing cottage industry - the coir industry. This enterprise almost exclusively located along the 590 km coastal belt of Kerala, provides direct employment to over half a million people in the state and produces nearly 90% of the total coir goods in the world. The shallow bays and lagoons of the 30 backwater systems of the state are traditional areas for the retting of coconut husk for the production of the coir fibre. The paper examines the environmental status of the retting grounds in Kerala, in relation to the biotic communities. The study revealed that retting activity has caused large scale organic pollution along with the mass destruction of the flora and fauna, converting sizeable sections of the backwaters into virtual cesspools of foul smelling stagnant waters. High values of hydrogen sulphide, ammonia, BOD 5 associated with anoxic conditions and low community diversity of plankton, benthic fauna, fish, shell fish, wood boring and fouling organisms were the outstanding feature of the retting zones.