Discussion on the Formulating of Discharge Standard of Mariculture Tailwater in Tianjin

摘要

Discharge standard of tailwater pollutants for mariculture is an important basis for discharge of mariculture tailwater. To formulate the discharge standard of mariculture tailwater in Tianjin scientifically, the characteristics of tailwater discharge of mariculture and relevant standards of other provinces and cities were studied by literature review and investigation, combined with the tailwater monitoring. According to the results, we proposed some suggestions to formulate discharge standard of mariculture tailwater. Firstly, the standard is applicable to mariculture in closed water. Secondly, classification is based on functions of receiving water and aquaculture models. Thirdly, the control indicators are representative and concise. Suspended solid, pH, chemical oxygen demand (CODMn), ammonia nitrogen, total nitrogen and total phosphorus are added. Fourthly, the emission limit is determined reasonably considering the technical and economic feasibility of pollution control. To ensure the implementation of the discharge standard smoothly, some suggestions from the perspective of administrative management, farmers and strengthening supervision and management are also put forward.