Solar drying as an option for post processing shrimp biowaste in Khulna District-Southwest Bangladesh | |
| Author | Begum, Salma |
| Call Number | AIT Thesis no.AQ-04-13 |
| Subject(s) | Shrimp industry--Bangladesh Shrimp industry--Waste disposal Solar dryers--Bangladesh |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-04-13 |
| Abstract | First expansion of shrimp processing industry has resulted in increased discharge of waste. Material discarded from treatment and processing of main products and by-products is termed as waste. About 30-45 percent (%) by weight, shrimp raw material is discarded as waste when processed shrimp is headless, shell on products. Value addition to shrimp processing wastes might provide extra income to the local workers. In Bangladesh it is estimated that about 114,000 metric tons/year of shrimp waste is produced annually. The study was conducted with survey on current status and a drying trial with traditional and solar dryer to assess solar dryer as an option for post processing shrimp bio-waste in Khulna district. Total waste estimated about 13,678 metric tons (MT). About 28% was processed as sun drying in open place. Among the rest (72%), a portion was dumped and a portion was utilized for catfish, white fish or shrimp culture. The primary reason for the limited utilization of waste is its highly perishable nature and lack of technical method than the traditional method. Among total of 1,580 waste processors, 70 processors were interviewed. They were involved seasonally with shrimp waste drying in traditional method. Rate of traditional dried products differed from 16% to 38%, one processor to other, suggesting the processors were not skilled in management. Products of traditional and solar drying methods indicate a significant difference among protein, lipid, moisture, fiber, and calcium content except nitrogen free extract, suggesting the product quality was highest in solar drying method. A high BOD was observed in the Rupsha, adjacent river to shrimp processing plants indicate unusable condition of water. Traditional method of drying also causes water unusable and bad smell. Therefore they needs to be support research, training and technology demonstration for effective waste drying. Law enforcement against illegal action could maintain environment in peace and encourage waste processing. Solar driers are small-scale engineering with low-cost locally available materials and could be operated close to the user's house. It could provide faster and more hygienic condition than traditional sun dryer appears most suitable for the limited income processors. The cost benefit ratio revealed solar drying method is very much applicable and could increase benefit. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-04-13 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Ikejima, Kou; |
| Examination Committee(s) | Yi, Yang;Bart, Amrit;Somsak Boromthanarat; |
| Scholarship Donor(s) | The Royal Netherlands Government; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2004 |