Water Quality Parameters of Tofu Wastewater: A Review

Abstract

The tofu industry’s existence is quite potential in recruiting labors, which can improve the economy of the surrounding community. On the other hand, it can also have a negative impact due to the wastewater produced from the tofu making process, which can damage the environment. Water is widely used as material for washing and boiling soybeans; due to the large use of water in making tofu and tempeh, fermented soybeans. The resulting waste is also quite large. This research presents a literature review with primary data on articles, magazines, reports, and theories. The purpose of this research is to provide an overview of the water quality parameters of tofu waste. The liquid waste produced by the tofu-making industry is a thick liquid that is separated from the clumps of tofu, which is called whey. This liquid contains high levels of protein and can quickly break down. This waste is often disposed of directly without prior treatment, resulting in a bad smell and polluting the environment. There are several parameters used to measure water quality, including physical, chemical, and biological properties.

Studi Efektivitas Pemanfaatan Arang Aktif Cangkang Kelapa Sawit (Elaeis guineensis) Sebagai Adsorben Pengurangan Kadar Amonia Limbah Cair Tahu

“…Limbah cair tahu mengandung gas-gas yang terdekomposisi bahan-bahan organik yang terdapat di dalam air buangan seperti gas nitrogen (N2), oksigen (O2), hidrogen sulfida (H2S), ammonia (NH3), karbondioksida (CO2) dan metana (CH4). Selain komponen gas, limbah cair tahu juga memiliki parameter-parameter seperti suhu, pH, COD, BOD, DO, dan TSS yang bisa menetukan kualitas limbah tersebut (Pagoray et al, 2021;Laksono Putro et al, 2021;Widayat et al, 2019).…”

Benthic macroinvertebrates as bioindicators to detect the level of water pollution in the upstream segment of Brantas River Watershed in Malang, East Java, Indonesia

“…Additionally, the decomposition of organic matter, such as domestic garbage, facilitated by bacteria transported by water currents, also contributes to the production of ammonia. The presence of ammonia in water can be attributed to the decomposition of inorganic and organic nitrogen compounds, including protein and urea (Putro et al 2021). According to Wahyudi et al (2017), the typical concentration of ammonia in river waters is less than 0.5 mg/L.…”

Effect of storage time on in-situ parameters and total nitrogen analysis results of tofu liquid waste samples

“…The pH value expresses the intensity of the acidity or alkalinity of a dilute liquid. The pH does not measure the total acidity or alkalinity; the pH value of water characterizes the balance between acid and base in water and is a measurement of the concentration of hydrogen ions in a solution [16]. Temperature determines the rate of catalysis, while pH determines the balance of enzymatic reactions [17].…”

“…This is because the dissolved ions in the solution act as charge carriers, allowing electrical current to flow through the solution more easily. Similarly, the higher the EC of a solution, the higher its TDS is likely to be since TDS is a measure of the total concentration of dissolved solids in the solution [16]. It is important to note that the exact relationship between EC and TDS can depend on factors such as the types of dissolved solids present in the solution, their ionic charges, and the temperature of the solution.…”