Bagasse | Images of Old Hawaiʻi

When we were kids and went fishing (trolling), I remember the frustrating – and repeated – need to pull in and clean the lines from floating bagasse (cane trash) that entangled at the lures.

It wasn’t a new thing, floating masses of bagasse have littered beaches/shorelines, affected fishers, and impacted marine resources for decades before. Several attempts to use bagasse rather than dump it (fuel to operate the mill, canec, etc) helped, but it wasn’t until the 1970s that the dumping finally stopped.

Sugar was a canoe crop; the early Polynesian settlers to Hawaiʻi brought sugar cane with them and demonstrated that it could be grown successfully in the islands.

In pre-contact times, sugarcane was not processed as we know sugar today, but was used by chewing the juicy stalks. Its leaves were used for inside house thatching, or for outside (if pili grass wasn’t available.) The flower stalks of sugar cane were used to make a dart, sometimes used during the Makahiki games. (Canoe Crops)

The first written record of sugarcane in Hawaiʻi came from Captain James Cook, at the time he made initial contact with the Islands.

On January 19, 1778, off Kauai, he notes, “We saw no wood, but what was up in the interior part of the island, except a few trees about the villages; near which, also, we could observe several plantations of plantains and sugar-canes.” (Cook)

Cook notes that sugar was cultivated, “The potatoe fields, and spots of sugar-canes, or plantains, in the higher grounds, are planted with the same regularity; and always in some determinate figure; generally as a square or oblong”. (Cook)

Sugarcane, a tall perennial grass, is grown in tropical and semitropical climates. (USDA) “Sugar cane, described in botany as Saccharum officinarum, is a giant-stemmed perennial grass that grows from eight to twenty-four feet long. … As a rule, sugar cane consists of about eighty-eight per cent of juice and twelve per cent of fiber”. (Rolph)

The first reported processing of sugar was noted … “in 1802 sugar was first made at these islands, by a native of China, on the island of Lanai. He came here in one of the vessels trading for sandal wood, and brought a stone mill, and boilers, and after grinding off one small crop and making it into sugar, went back the next year with his fixtures, to China.” (Torbert; Polynesian, January 31, 1852)

As production grew, the early sugar ventures were either Hawaiian-owned or regulated by Hawaiian rulers. In most instances, the Hawaiian-owned sugar processing was managed by either Chinese sugar boilers or American shopkeepers in rural districts. (MacLennan) Although sugar cane had grown in Hawaiʻi for many centuries, its commercial cultivation for the production of sugar did not occur until 1825.

In that year, John Wilkinson and Governor Boki started a plantation in upper Mānoa Valley. Within six months they had seven acres of cane growing, and by the time Wilkinson died, in September 1826, they had actually manufactured some sugar. The sugar mill was later converted into a distillery for rum, prompting Kaʻahumanu to have the cane fields destroyed around 1829. (Schmitt)

Shortly thereafter, King Kamehameha III, seeking to encourage commercial cultivation of sugar by native Hawaiians offered the “acre system,” giving “out small lots of land, from one to two acres, to individuals for the cultivation of cane.”

“When the cane is ripe, the King finds all the apparatus for manufacturing & when manufactured takes the half. Of his half one fifth is regarded as the tax due to the aupuni (government) & the remaining four fifths is his compensation for the manufacture. These cane cultivators are released from all other demands of every description on the part of chiefs.” (Armstrong (1839;) MacLennan)

About this time, the initial signs of commercial sugar are found on Maui, in Wailuku. In 1840, the King ordered an iron mill from the US, and it was erected by August. Hung & Co in 1841 advertised the sale of sugar and sugar syrup from its 150-acre plantation in Wailuku. More than likely, this was sugar from the King’s Mill. (MacLennan)

Early plantations were small and didn’t fare too well. Soon, most would come to realize that “sugar farming and sugar milling were essentially great-scale operations.” (Garvin)

Then, the King sought to expand sugar cultivation and production, as well as expand other agricultural ventures to support commercial agriculture in the Islands. In a speech to the Legislature in 1847, the King notes:

“I recommend to your most serious consideration, to devise means to promote the agriculture of the islands, and profitable industry among all classes of their inhabitants. It is my wish that my subjects should possess lands upon a secure title; enabling them to live in abundance and comfort, and to bring up their children free from the vices that prevail in the seaports.”

“What my native subjects are greatly in want of, to become farmers, is capital with which to buy cattle, fence in the land and cultivate it properly. I recommend you to consider the best means of inducing foreigners to furnish capital for carrying on agricultural operations, that thus the exports of the country may be increased …” (King Kamehameha III Speech to the Legislature, April 28, 1847; Archives)

A few things helped kick-start this vision – following finding gold in 1848, the California gold rush stimulated a small boom in commercial agriculture for the Islands – particularly in potatoes and sugar. However, by the end of the 1850s, the boomlet became a depression (California started to supply its own needs.)

The American Civil War virtually shut down Louisiana sugar production during the 1860s. Hawaiian-grown sugar soon replaced much of this southern sugar through the duration of the conflict.

By the end of the war, over thirty extremely prosperous plantations were in operation and expanded to new levels previously unheard of before the war’s commencement.

Hawaiʻi’s industrial plantations began to emerge at this time (1860s;) they were further fueled by the Treaty of Reciprocity – 1875 between the United States and the Kingdom of Hawai‘i eliminated the major trade barrier to Hawai‘i’s closest and major market.

A century after Captain James Cook’s arrival in Hawaiʻi, sugar plantations started to dominate the landscape. Hawai‘i’s economy turned toward sugar in the decades between 1860 and 1880; these twenty years were pivotal in building the plantation system.

The industry came to maturity by the turn of the century; the industry peaked in the 1930s. Hawaiʻi’s sugar plantations employed more than 50,000 workers and produced more than 1-million tons of sugar a year; over 254,500-acres were planted in sugar.

Sugarcane is crushed in the mill to extract and process the sugar. Several waste products are produced by the sugar industry – one was bagasse (the fibrous residue that remains after sugarcane stalks are crushed to extract the juice), and the mills would flume it out of the mill and simply dump it in the ocean.

Later, some of the bagasse was made into fiber board. In 1929, Hawaiian Cellulose Ltd, a subsidiary of the Waiākea Mill Company applied for a patent for the manufacture of it. (County of Hawai‘i) They made ‘canec.’

Canec was originally the brand name for pressed fiber board made by Hawaiian Cane Products, Ltd, but it became commonly used to refer to all pressed board of this type.

Also, later, “After passing through the last mill, as much cane pulp (bagasse) as needed is fed into the mill fireroom for use as fuel.” (EPA) The bagasse was pelletized and fueled the boiler.

In 1971, ecological studies of coral communities along the Hamakua Coast of the island of Hawaii resulted in the instigation of a number of Environmental Protection Agency restrictions regarding ocean disposal by sugar mills.

These included, among other things, the elimination of bagasse discharge into the ocean and significant reductions in total suspended solid (TSS). Compliance with EPA standards was achieved in 1979. (Grigg)

Mats of bagasse no longer clogged and smothered rocky bottom habitats. Also mats of bagasse on the ocean surface no longer fouled fishing boats and fishing gear. (Grigg)

The first written record of sugarcane in Hawaiʻi came from Captain James Cook, at the time he made initial contact with the Islands. On January 19, 1778, off Kauai, he notes, “We saw no wood, but what was up in the interior part of the island, except a few trees about the villages; near which, also, we could observe several plantations of plantains and sugar-canes.” (Cook)

Sugarcane, a tall perennial grass, is grown in tropical and semitropical climates. (USDA)

To plant it, short sections of sugar cane plant stalk containing one or more node are first planted in soil which has been deep-plowed and formed into furrows that follow the contour of the land. In about 24 months a mass of vegetation (up to 10-feet high) has developed and is ready for harvest.

There are two factors that distinguish cane sugar production in Hawaii from cane sugar production in other parts of the world. First, growers do not harvest Hawaiian sugarcane until it is an average of two years old. In most other areas, sugarcane is harvested after one year of growth. (EPA)

Prior to World War II, almost all cane was cut by hand and transported to the sugar mills through an extensive network of water flumes. When water flumes did not exist, mule-drawn wagons carried the cane to rail roads for transport.

Following World War II, mechanical harvesting completely replaced the hand cutting of cane. The most common method of harvesting is to snap off the cane at ground level with a bulldozer-type push rake on a large standard tractor. (EPA)

Sugar cane is processed at two facilities: processing starts at a raw sugar factory and finished at a sugar refinery. The following address raw sugar processing. (Sugar Association)

When harvested, the root structure is left intact so that a second, third, or even fourth crop of sugar cane may be produced from suckers which grow from the root structure of old harvested plants. This process is known as ‘ratooning.’

Bulldozers then rake the cane into piles for cranes, equipped with special grabs, to load the cane into special cane haulers usually consisting of an enormous truck-tractor unit and semi-trailer. (EPA)

The operations necessary for making raw cane sugar are as follows :

The extraction of the juice.
The purification of the juice.
The evaporation of the juice to syrup point.
The concentration and crystallization of the syrup.
The preparation of the crystals or grains for the market by separating them from the molasses. (Rolph)

The cane initially moves to a feeder table, up a conveyor, and then contacts a drum which spreads it out into a thin even blanket. Next it passes over a set of rollers which acts as a primary rock extractor. From there it falls into a flotation bath where rocks and other heavy foreign matter settle in the tank and are carried away. (EPA)

Following the flotation bath, the cane proceeds up a conveyor where heavy washing begins. Next it passes over drums to be shaken and leveled. The root structure holding the stalks together is then broken and here also final washing occurs.

The cane then moves over trash extractors (oppositely spinning rollers) which grab and strip leaves from the stalks. The resulting trash is conveyed away from the cleaning plant. A series of knives then cut the cane into small lengths for crushing by a pair of corrugated rollers.

Typically, the milling is through a tandem of three rollers, and the chopped cane passes through each mill in succession to remove the sugar cane juice. Either three, four, or five mills in a series are employed to squeeze the juice out of the cane stalks. (EPA)

Following extraction, sugar cane juice is sent through a clarifier; after leaving the clarifier, the juice enters a multi-effect steam evaporator from which it emerges with greater density as ‘syrup.’

The syrup then enters vacuum pans where it is converted into molasses. In the pans, sugar crystals are also formed from the syrup by the process of evaporation to saturation. At the end of this operating cycle, the crystals are centrifuged to remove the molasses.

The sugar from the first pan operation is of commercial raw sugar quality and is ready for shipment to a mainland refinery. The molasses remaining from centrifuge of the first boiling operation is called ’A’ molasses. This is returned directly to the pans for a second cycle.

The material from the second pan operation is centrifuged and the sugar produced is also of commercial quality. The molasses remaining from the second pan operation is called ‘B’ molasses. ‘B’ molasses is of low quality sugar content and must be specially processed before additional sugar can be produced. (EPA)

The raw sugar is then sent in bulk to refineries (C&H) for finishing, packaging and marketing/shipping. The initial step in cane sugar refining is washing the sugar, called affination, with warm, almost saturated syrup to loosen the molasses film.

There are a variety of steps of heating, separation of sugar crystals (in centrifuges), screening, washing and clarification. Two clarification methods are commonly used: pressure filtration and chemical treatment.

To produce refined granulated sugar, white sugar is transported by conveyors and bucket elevators to the sugar dryers. The most common sugar dryer is the granulator, which consists of two drums in series. One drum dries the sugar and the other cools the dried sugar crystals.

In addition to granulated sugar, other common refined sugar products include confectioners’ (powdered) sugar, brown sugar, liquid sugar, and edible molasses. (Food and Agricultural Industry; EPA) (The color and flavor of brown sugar come from the residual molasses left in the crystals during the refining process.)

Several waste products are produced by the sugar industry in raw sugar processing – one was bagasse, and the mills would flume it out of the mill and simply dump it in the ocean.

Later, some of the bagasse was made into canec. In 1929, Hawaiian Cellulose Ltd, a subsidiary of the Waiākea Mill Company applied for a patent for the manufacture of it. (County of Hawai‘i) They made ‘canec.’

Canec was originally the brand name for pressed fiber board made by Hawaiian Cane Products, Ltd., but it has become commonly used to refer to all pressed board of this type.

Also, later, “After passing through the last mill, as much cane pulp (bagasse) as needed is fed into the mill fireroom for use as fuel.” (EPA) The bagasse was pelletized and fueled the boiler.

In 1906, the California and Hawaiian Sugar Refining Company (C&H) began refining pure cane sugar in the small town of Crockett, California, near San Francisco. As cargo ships offloaded raw cane sugar from the Hawaiian Islands, the refinery employed 490 people and produced 67,000 tons of refined cane sugar.

Cane Trash

Making Sugar